Series 1000 1/4
DIN Analog Controller/Limit Device
Overview / Design Principle:
The Series 1000 are versatile analog controllers designed for rugged, reliable, low cost control of process
variables in harsh industrial environments, even those plagued by environmental electronic noise.
Available as a non-indicating analog on/off controller or high or low limit device, it offers a quality
level not commonly found in comparably priced devices. It is a 1/4 DIN instrument with a depth of only 5.8
inches. All versions are UL recognized and CSA certified as controllers and limit devices are FM approved.
The Series 1000 can accommodate J, K, T, R, B, and S thermocouples. Outputs are either SPST or SPDT
electro-mechanical relay or solid state relay drivers.
Features and Benefits:
• Non-display, easy dial setting
• 1/4 DIN panel mount
• Thermocouple input
• Sensor fault detection
• Relay or SSR driver output
• High or Low Limit or On/Off control
Printable Literature
Data Sheet
Series 1161+ 1/16
DIN Limit Controller
Overview / Design Principle:
The Partlow 1161+ is part of a range of new generation '+' Series limit devices that share the same
distinctive styling as the '+' Series temperature controllers.
The expanded '+' Series limit controller platform includes 1/4, 1/8 and 1/16 DIN models that incorporate
numerous product specification, communication, display interface and software improvements that surpass
competitive limit device offerings in ease of use, delivery and valueper dollar characteristic of the
growing '+' Series product family.
By adding more versatile features and user-friendly functionality like digital inputs, an easy-to-use HMI,
jumperless and auto-hardware configuration, 24VDC transmitter power supply and MODBUS communication across
the range - the new generation Partlow + Series limit controllers transform the complicated into the simple
while saving you time (as much as 50% on product set-up), reducing inventory stock and virtually eliminating
the likelihood of operator errors.
The + Series limit controllers are affordable, well-featured, easy to use and adaptable with performance
features that work for you to make limit control simple.
Features and Benefits:
• NEW Improved easy-to-use HMI
• NEW Jumperless input configuration
• NEW Auto-hardware recognition
• NEW Improved Windows PC configuration
software
• Process alarms
• Optional digital input and remote reset
• Optional 10V SSR driver output
• Faster communication speeds in selectable
MODBUS or ASCII format
• FM Approved
• Backward compatible panel cutout, housing
and terminal wiring capability
Printable Literature
Data Sheet
Series 1401+ 1/4
DIN Limit Controller
Overview / Design Principle:
The Partlow 1401+ is part of a range of new generation '+' Series limit devices that share the same distinctive styling
as the '+' Series temperature controllers.
The expanded '+' Series limit controller platform includes 1/4, 1/8 and 1/16 DIN models that incorporate numerous product
specification, communication, display interface and software improvements that surpass competitive limit device offerings in
ease of use, delivery and valueper dollar characteristic of the growing '+' Series product family.
By adding more versatile features and user-friendly functionality like digital inputs, an easy-to-use HMI, jumperless
and auto-hardware configuration, 24VDC transmitter power supply and MODBUS communication across the range - the new generation
Partlow + Series limit controllers transform the complicated into the simple while saving you time (as much as 50% on product
set-up), reducing inventory stock and virtually eliminating the likelihood of operator errors.
The + Series limit controllers are affordable, well-featured, easy to use and adaptable with performance features that
work for you to make limit control simple.
Features and Benefits:
• NEW Improved easy-to-use HMI
• NEW Jumperless input configuration
• NEW Auto-hardware recognition
• NEW Improved Windows PC configuration
software
• Process alarms
• Optional digital input and remote reset
• Optional 10V SSR driver output
• Faster communication speeds in selectable
MODBUS or ASCII format
• FM Approved
• Backward compatible panel cutout, housing
and terminal wiring capability
Printable Literature
Data Sheet
Series 1801+ 1/8
DIN Limit Controller
Overview / Design Principle:
The Partlow 1801+ is part of a range of new generation '+' Series limit devices that share the same distinctive
styling as the '+' Series temperature controllers.
The expanded '+' Series limit controller platform includes 1/4, 1/8 and 1/16 DIN models that incorporate numerous
product specification, communication, display interface and software improvements that surpass competitive limit device
offerings in ease of use, delivery and value per dollar characteristic of the growing '+' Series product family.
By adding more versatile features and user-friendly functionality like digital inputs, an easy-to-use HMI, jumperless
and auto-hardware configuration, 24VDC transmitter power supply and MODBUS communication across the range - the new generation
Partlow + Series limit controllers transform the complicated into the simple while saving you time (as much as 50% on product
set-up), reducing inventory stock and virtually eliminating the likelihood of operator errors.
The + Series limit controllers are affordable, well-featured, easy to use and adaptable with performance features that
work for you to make limit control simple.
Features and Benefits:
• NEW Improved easy-to-use HMI
• NEW Jumperless input configuration
• NEW Auto-hardware recognition
• NEW Improved Windows PC configuration
software
• Process alarms
• Optional digital input and remote reset
• Optional 10V SSR driver output
• Faster communication speeds in selectable
MODBUS or ASCII format
• FM Approved
• Backward compatible panel cutout, housing
and terminal wiring capability
Printable Literature
Data Sheet
Series 1160+ 1/16
DIN Temperature Controller
Overview / Design Principle:
The Partlow 1160+ is a new generation of '+' Series controller that takes flexibility and ease of use to new levels. The
expanded '+' Series platform of 1/4, 1/8 and 1/16 DIN model controllers incorporates numerous product specification,
communication, display interface and configuration software improvements that surpass competitive offerings in ease of use,
delivery and value per-dollar.
By adding more versatile features and user-friendly functionalities than ever before - like remote setpoint inputs,
digital inputs, plug-in output modules, a customizable operator/HMI menu, jumperless and auto-hardware configuration,
and 24VDC transmitter power supply - the new generation 1160+ Series controller transforms the complicated into the
simple while saving you time (as much as 50% on product set-up), reducing inventory stock and virtually eliminating
the likelihood of operator errors.
Making things complicated is easy - the clever trick with the new generation 1160+ Series controller from
Partlow is to make it simple.
Features and Benefits:
• Dual setpoints with optional remote
selection
• Plug-in output modules allow installing just
the functions needed
• Expanded user-selectable operator modes
• User-selectable plug-and-play output cards
• Process and loop alarms
• Adjustable hysteresis
• Optional 10V SSR driver
• Improved Windows® PC configuration
software
• Improved easy-to-use HMI
• Jumperless input configuration
• Auto-hardware recognition
• Faster communication speeds
• More security options
• Backward compatible panel cutout, housing and terminal wiring capability
Printable Literature
Data Sheet
Series 1400+ 1/4
Temperature Controller
Overview / Design Principle:
The Partlow 1400+ is a new generation of '+' Series controller that takes flexibility and ease
of use to new levels. The expanded '+' Series platform of 1/4, 1/8 and 1/16 DIN model controllers
incorporates numerous product specification, communication, display interface and configuration
software improvements that surpass competitive offerings in ease of use, delivery and value per-dollar.
By adding more versatile features and userfriendly functionalities than ever before - like remote
setpoint inputs, digital inputs, plug-in output modules, a customizable operator/HMI menu, jumperless
and auto-hardware configuration, and 24VDC transmitter power supply - the new generation 1400+ Series
controller transforms the complicated into the simple while saving you time (as much as 50% on product
set-up), reducing inventory stock and virtually eliminating the likelihood of operator errors.
Making things complicated is easy - the clever trick with the new generation 1400+ Series
controller from Partlow is to make it simple.
Features and Benefits:
• Dual setpoints with optional remote
selection
• Plug-in output modules allow installing just
the functions needed
• Expanded user-selectable operator modes
• User-selectable plug-and-play output cards
• Process and loop alarms
• Adjustable hysteresis
• Optional 10V SSR driver
• Improved Windows® PC configuration
software
• Improved easy-to-use HMI
• Jumperless input configuration
• Auto-hardware recognition
• Faster communication speeds
• More security options
• Backward compatible panel cutout, housing and terminal wiring capability
Printable Literature
Data Sheet
Series 1800+ 1/8
Temperature Controller
Overview / Design Principle:
The Partlow 1801+ is part of a range of new generation '+' Series limit devices that share the same distinctive styling as
the '+' Series temperature controllers.
The expanded '+' Series limit controller platform includes 1/4, 1/8 and 1/16 DIN models that incorporate numerous product
specification, communication, display interface and software improvements that surpass competitive limit device offerings in
ease of use, delivery and value per dollar characteristic of the growing '+' Series product family.
By adding more versatile features and user-friendly functionality like digital inputs, an easy-to-use HMI, jumperless
and auto-hardware configuration, 24VDC transmitter power supply and MODBUS communication across the range - the new generation
Partlow + Series limit controllers transform the complicated into the simple while saving you time (as much as 50% on product
set-up), reducing inventory stock and virtually eliminating the likelihood of operator errors.
The + Series limit controllers are affordable, well-featured, easy to use and adaptable with performance features that
work for you to make limit control simple.
Features and Benefits:
• NEW Improved easy-to-use HMI
• NEW Jumperless input configuration
• NEW Auto-hardware recognition
• NEW Improved Windows PC configuration
software
• Process alarms
• Optional digital input and remote reset
• Optional 10V SSR driver output
• Faster communication speeds in selectable
MODBUS or ASCII format
• FM Approved
• Backward compatible panel cutout, housing
and terminal wiring capability
Printable Literature
Data Sheet
MRC 5000
Basic Digital Circular Chart Recorder
Overview / Design Principle:
Designed with the latest innovations in recording technology, enclosures and functionality,
the MRC 5000 is slim, trim and simple. The MRC 5000 is a digital circle chart recorder capable of
measuring, recording and controlling up to two process variables from a variety of inputs. Finding
a place to install this recorder is easy, with its compact panel depth and short protrusion from the
front panel. The mode switch, located next to the display, provides two functions. When in the
PROG/CAL/TEST position, it provides access to program parameters, calibration facilities and test
functions. Hardware options are matrix selectable and are shipped with default settings. The MRC 5000
directly connects to either thermocouple, RTD, mVDC, VDC, or mADC inputs. Changes in input type are
easily accomplished in the field through programming. This instrument has a universal power supply,
90-264VAC line voltage at 50-60Hz.
Features and Benefits:
• Easy and simple in every aspect of
operation: programming, testing
and calibration
• Standard easy read display saves setup
time, ensures proper configuration
and allows for field calibration
• Completely assembled slim/trim design no
assembly required reduces your panel
depth and saves you money
• Wide range of power operation
• More standard input selections, time
rotations and optional features
• Value priced basic recording
Printable Literature
Data Sheet
MRC 7000
Recorder/Controller/Profiler
Overview / Design Principle:
The MRC7000 Recorder/Controller is a microprocessor based circular chart instrument capable of measuring, displaying,
recording and controlling up to two process variables from a variety of inputs. Record and control functions, alarm settings
and other parameters are easily configured via the keys on the front cover and self prompting displays. All user entered data
can be protected against unauthorized changes via the MRC7000 Enable Mode security system.
Features and Benefits:
Micro based recording with controller or profiler options with programming setpoint profile capability in one instrument
Two displays allow you to see critical process values at the same time (on 2 pen units)
Easy, straightforward programming allows you to configure your recorder with a logical step-by-step process using a simple keypad
Optional true time based profiling capability puts you in control of your process
Reliability maintenance free recording for years to come
Printable Literature
Data Sheet
MRC 7700
RH Recorder/Controller/Profiler
Overview / Design Principle:
The MRC7700 Relative Humidity Recorder is a microprocessor based circular chart profile recorder capable of measuring,
displaying, recording and controlling relative humidity and/or temperature using Dry Bulb and Wet Bulb temperatures from a
variety of inputs. Record and control functions, alarm settings and other parameters are easily configured via the keys
on the front cover and self prompting displays. NEMA 3 protection and sealed door lock optional.
Features and Benefits:
• Micro based recording controller
with relative humidity profile capability
• Two displays allowing you to see critical
process values at the same time
• Easy, straightforward programming allows
you to configure your recorder with a logical
step-by-step process using a simple
keypad
• True time based profiling capability puts
you in control of your process
• Reliability maintenance free recording for
years to come
Printable Literature
Data Sheet
MRC 7800
Flow Recorder
Overview / Design Principle:
The MRC 7800 Flow Controller is a microprocessor based circular chart recorder capable of measuring, displaying,
recording and totaling flow process variables. Record functions, alarm settings and other parameters are easily configured
from the front mounted keypad and self prompting displays. All user data can be protected from unauthorized changes by the
Enable Mode security system. The MRC7800 is protected against loss of data from AC power failures by a standard battery
backup system. Applications for the MRC 7800 include process validation, trend analysis, regulatory compliance and
product safety. Flow tracking is available with the optional totalizing capability.
Features and Benefits:
• Micro based recording controller
• Two displays, allowing you to see critical
process values at the same time
• Easy, straightforward programming allows
you to configure your recorder with a logical
step-by-step process using a simple
keypad
• High reliability eliminates cost of process
downtime
• Up to 8 relay or solid state outputs for use
as totalizer presets
• Up to 4 analog outputs for process
retransmission
Printable Literature
Data Sheet
MRC 8000
Recorder/Controller
Overview / Design Principle:
The MRC 8000 incorporates numerous refinements over its 10½ MRC 7000™ sibling, including a
larger 12 inch recording area; an advanced platen assembly which eliminates slide wire feedback for improved reliability; as
well as the incorporation of optional isolated 4-20mA outputs to provide the highest resolution and accuracy available in a
recorder of this type. The MRC 8000 is offered in two versions: a basic recorder and a recording controller. Both may be
specified as either single pen or dual pen units. Each version is capable of measuring, recording and displaying temperature,
pressure, level, flow and other process variables. The MRC 8000 includes isolated universal inputs and a list of optional
capabilities including: transmitter power supply, 5A relay outputs, auxiliary inputs for remote setpoints, RS-485 communications,
door lock and NEMA 4X enclosure.
Features and Benefits:
• 12½ Micro-based recording controller with
remote setpoint capability
• Two large displays allow you to see critical
process values at the same time on 2
pen models
• Easy, straightforward programming allows
you to configure your recorder with a
logical step-by-step process using a simple
keypad
• High resolution of recorder process
variables for better record accuracy
• Reliability maintenance free recording for
years to come
Printable Literature
Data Sheet
MRC 9400
VersaEZ (Simplified) High-End 4-Pen Color Temperature Recorder with Alarms
Overview / Design Principle:
The MRC 9000 VersaEZ will record up to four process variables on a circular chart. The circular chart
sizes are 10½, 11½ or 12½ with the unit shipped to you configured to record on 12½ paper. The VersaEZ is
designed to provide you with a product that is user-friendly, and delivers a high quality unalterable
printout of your process data. Out of the box the VersaEZ is set up for most common applications. Given
that there are many variables in the world of process control, no one set-up will cover all needs. Yet
preconfigured as the VersaEZ is, it will minimize the amount of time you need to commit to programming.
You need only change the parameters necessary to get your process running and documented.
Features and Benefits:
• Pre-configured for you for E-Z installation
and out-of-the box, plug and play
capability
• Four pens and four colors
• Flexible chart sizes-choose from 10-12½
diameter
Printable Literature
Data Sheet
MRC 9000
VersaChart (Full Version) High-End Recording Controller/Profiler
Overview / Design Principle:
The VersaChart is perfect for demanding applications requiring a high performance recorder/controller
with custom ramp/soak capability. The Versachart provides powerful true time based profile capability and
exceptional value per data. Using advanced printing technology, the Versachart produces a circle chart in
four colors with alpha/ numeric chart characters for clear, accurate and readable charts that can be archived.
It is the only circle chart recorder to deliver up to 16 Profiles with up to 8 segments per profile. The profiling
feature provides closed loop PID process control with the added capability of configurable setpoints as a function
of time. Additionally, the profile feature includes actuators, parameters and a function block feature permitting
logic equations. The entire recorder (recorder, controller and profile feature) is easy to setup with its innovative
PC configuration port and available PC configuration software with security and single point data access features.
A recovery feature is also part of the profile option which enables users to choose a course of action in the advent
of power loss, preventing unnecessary process cycling. Finally, a guaranteed soak feature assures that the actual
process variable during soak is within a preselected tolerance for the soak time to increase product quality and
prevent waste/loss.
Features / Benefits:
• Micro-based recorder/controller with profile
capability
• Four pens and four colors
• Flexible chart sizes choose from 10-12
diameter
• Two displays allowing you to see critical
process values at the same time
• Easy, straightforward PC programming
allows you to configure your recorder with
a logical step-by-step process using a
simple keypad
• True time based profiling capability
(including Four Process PID Loops,
Recovery Action, Guaranteed Soak)-and
up to 16 profiles puts you in control of your
process
• Reliability maintenance free recording for
years to come
• Excellent features/reasonable price
Printable Literature
Data Sheet
N79-79
Non Indicating Temperature Controller
Overview / Design Principle:
This unit is a two-switch, non-indicating temperature control with unlimited differential
setting capabilities between switches. It is used where two fixed temperatures are specified
as control points and where a change or adjustment of those points is seldom required. UL and
CSA listed.
Operation:
Temperature setting on the N79-79 may be set by the factory or the end user by adjusting
screws inside the control case in conjunction with an accurate temperature-sensing device
placed adjacent to the thermal sensing element.
Due to the construction of the instruments, the switches are held in a depressed position
and revert to their normal, or free state, in response to a temperature increase.
Therefore, as a mechanism function in this control, a normally open two-wire switch, or
the normally open side of a three-wire switch, operates as a normally closed circuit when the
bulb temperature is below set point.
Printable Literature
Data Sheet
ZF79
Non Indicating Temperature Controller
Overview / Design Principle:
This unit is a compact single-switch industrial temperature controller designed to operate
fuel valves or relays which start and stop heating or cooling systems. It can also be used as a
limit device for sounding an alarm, actuating lights or to shut down equipment at a pre-determined
termperature. Compact, flush or wall mounted (brackets included), externally adjustable set point,
available in twelve optional ranges within -30°F to 1100°F. UL and CSA listed.
Operation:
Temperature is set by turning the large, easy to handle setting knob on the front of the
instrument to the desired point on 200 angular degree semi-circular scale.
Expansion and contraction in the sensing element moves the switch-actuating lever through
a simple mechanical linkage. Optional weather resistance accessory (Acc 243) is available.
Adaptionof Acc 243 provides for inverted mounting and special gasketing for resistance to normal
outdoor climate conditions.
Printable Literature
Data Sheet
OL63X
Non Indicating High Temp
Overview / Design Principle:
This unit is used to cut off a heat supply at any pre-determined temperature within
the overall range of -30°F to 1100°F. It operates in conjunction with a separate temperature
control to provide positive safety shutdown of industrial heating appliances. Reset button
and safety light on front cover, trip free switch, fully tamperproof. UL and FM listed.
Agency recognition is void if instrument is modified from factory standard.
Operation:
The high limit switch is manually reset to reactuate the equipment after shutdown.
It can be reset only after temperature has returned below the high-limit setting. The
switch is of a trip-free design, i.e. it will not function in the event the reset
button is tied or welded down, providing protection from tampering.
It is designed primarily for user applications where high temperature limitations
can be specified in advance of ordering , the OL63X is always factory preset to customer
requirements and the setting adjustment is factory sealed to prevent unauthorized changing.
Note: The element must be purchased with instrument to have switch set correctly.
Preset limit temperature is stamped on the rating plate affixed to the side of the control case.
A cover-mounted red signal light remains "on" during normal operation. Light is de-energized
the instant the high limit switch is activated. The instrument also is equipped with capstan cover
screws through which a wire may be threaded and secured with a lead seal.
Printable Literature
Data Sheet
O63X
Non Indicating High Temp
Overview / Design Principle:
This unit is for OEM's. Identical to the OL63X in all respects except for the preset high temperature limit and
sealing of the setting adjustment, the O63X is listed under UL component recognition program. However, it does not
carry the UL label when it leaves the factory.
This modification of the OL63X is made to accommodate the original equipment manufacturer who, at the time of
ordering, has not determined the high temperature limit to be imposed on a given applicaiton.
The OEM is required to make his own temperature setting and to seal the setting adjustment screw to qualify
the limit device for incorporation in UL listed appliance.
Operation:
Identical to the OL63X in all respects except for the preset high temperature limit and sealing of the setting
adjustment - refer to OL63X operation specifications for more details.
Printable Literature
Data Sheet
OHL63X
Non Indicating High Temp
Overview / Design Principle:
This unit incorporates element failure protection. It operates in conjunction with a primary temperature controller to provide positive safety shutdown of industrial heating appliances. If features fully tamperproof trip-free switch, reset button and signal light on front cover. It has both UL and FM listing. Agency recognition is void if instrument is modified from factory standard.
Operation:
The high limit switch is manually reset to reactuate the equipment after shutdown. It can be reset only
after temperature has returned below the high-limit setting. The switch is of a trip-free design, i.e. it
will not function in the event the reset button is tied or welded down, providing protection from tampering.
Designed primarily for user applications where high temperature limitations can be specified in advance
of ordering , the OHL63X is always factory preset to customer requirements and the setting adjustment is factory
sealed to prevent unauthorized changing. Note: The element must be purchased with instrument to have
switch set correctly. Preset limit temperature is stamped on the rating plate affixed to the side of the control case.
The element failure switch, connected in series with the high limit switch, is factory set are a point below normal
ambient, at 50°F, unless otherwise specified. This switch will prevetn appliance start-up if ambient temperature is lower
than switch setting or if the instrument's thermal element has lost some of its fill.
A cover-mounted amber signal light remains energized during normal operation, while the light is de-energized the
instant the high limit switch is activated. The instrument also is equipped with capstan cover screws through which a
wire may be threaded and secured with a lead seal.
Printable Literature
Data Sheet
N5-10X
Non Indicating High Temp
Overview / Design Principle:
This unit is designed to operate in conjunction with a primary temperature controller to provide positive
safety shutdown of industrial heating systems.
The instrument also contains a fail-safe feature in the event temperature drops below normal ambient because
of accidental severance of sensing bulb or capillary. This instrument has manual reset, internal-switch actuation
adjustment and is available with any temperature ranged element from -30°F to 1100°F. CSA and FM listed. Agency
recognition is void if instrument is modified from factory standard.
Operation:
Switches are set at designated temperatures by removing the front cover and adjusting setting of switch
actuating screws on the lever arms. The element failure switch is usually set at ambient temperature.
Adjustment is made by reference to a test thermometer of known accuracy, its probe placed adjacent to
the thermal sensing bulb in the controlled medium.
Printable Literature
Data Sheet
ZFHL
Non Indicating High Temp
Overview / Design Principle:
This unit is designed to operate in conjunction with a primary temperature controller to
cut off heat supply if preset temperature is exceeded.
The externally-set Model ZFHL is tamperproof by application of clear acrylic dial and knob
shield which is held in place by capstan cover screws. This feature permits tie-wiring for positive
sealing of the protective shield. Reset button on front of cover, FM listed. Agency recognition is
void if instrument is modified from factory standard.
Operation:
The high limit switch is positioned to desired setting by turning dial knob on the instrument
cover, this is accomplished only after the acrylic dial shield is removed by withdrawing the capstan
cover screws.
In response to minuet temperature changes, expansion and contraction in the thermal element
moves a switch actuating lever through a simple mechanical linkage. When the bulb reflects the
temperature set on the dial, the limit switch is actuated, shutting down equipment, energizing
the lights or sounding alarms.
Only when the process temperature drops beow the dial setting can the switch be reset by
pushing the reset button on the cover of the instrument.
Printable Literature
Data Sheet
RFT
Recording Thermometer
Overview / Design Principle:
Records temperature on a 10" chart. Twelve ambient compensated ranges within -30°F to 1100°F, permit
application diversity from refrigeration to high temperature ovens. Standard clock rotations 12, 24 and
48 hour, 7 day, others availalble. Choice of electric or spring wound chart drives available. Wall mounted
(brackets furnished) or flush mounted. UL listed.
Operation:
Pen recording is powered by the Piston Pak thermal sensing element, which is field replaceable.
Temperature ranges may be substituted at any time by obtaining the correct Piston Pak assembly and proper
chart graph, and exchange these with those already on the recorder, providing field range changeability.
Printable Literature
Data Sheet
RF15-79
Two Switch Recording Temperature Control
Overview / Design Principle:
This recording temperature controller incorporates two switches which operate in fixed
relationship to the temperature setting. Differential between switches can be adjustable up to
5% of scale range. Like other RF series recorders, this unit has a 10" chart, may be flush or
surface mounted. Unit is shipped with brackets for surface mounting operation. UL and CSA listed.
Operation:
This unit incorporates two snap-setting switches mounted on a common setting arm (red pointer)
and actuated by the same temperature response mechanism which moves the recording pen.
First to be actuated on a temperature rise is the leaf-type switch. The second, a pin type switch,
is actuated only when the recorded temperature exceeds the operation of the first switch.
Switches are mounted one behind the other, each having its own circuit. Temperature actuation points
between the two switches (differential) is adjustable from 0 to 5 percent of scale range with tolerance
on switch settings ±1/2%. Adjustment is made by set screws inside the instrument case.
Printable Literature
Data Sheet
RFA
Pneumatic Temperature Controller/Recorder
Overview / Design Principle:
This recorder is an accurate, sensitive pneumatic controller used in conjunction with an
air-operated valve for control of steam, gas or fuel for combustion equipment or to operate
other pneumatic devices. Requires approximately 16 psi input, air output is 3 to 15 psi,
throttling span is 5% to 25% of scale range. Flush or wall mounted (brackets supplied)
with 12 optional ranges from -30°F to 1100°F.
Operation:
Operates in an adjustable throttling range of 5-25% of scale range. As the indicating
pointer, moving up or down scale in response to the expansion or contraction in the thermal
sensing element, enters the throttling range and approches set point, it changes the effective
orifice in the instrument's bleed valve.
Depending upon its control action (reverse or direct acting) this increases or decreases
the pressure delivered to the remotely-placed air operated control device.
Pressure transmitted by the control instrument is reflected by teh valve postition of the
air-operated device which modulates the flow of heating or cooling medium.
Load error, inherent in throttling controls, is compensated by manual reset adjustment.
Note: For long air line feeds, ie. 10 feet or greater, or large volume air valves or
control devices, an air pressure booster relay is strongly recommended.
Printable Literature
Data Sheet
RFP
Modulating Temperature Recorder
Overview / Design Principle:
This recorder is a potentiometer-type controller designed for use with porportional positioning motors
to operate modulating valves or damper systems where extremely close sensitivity or straight-line control is required.
The instrument automatically positions any of a variety of standard motor operators to provide precise
temperature control without sawtooth line characteristics of conventional on-off control. Flush or wall mounted,
brackets supplied. Available in 12 optional ranges from -30°F to 1100°F. CSA listed.
Operation:
The potentiometer coil, which moves up or down scale in response to the expansion or contraction in the
thermal element, also slides the contact finger along the potentiometer coil within the modulating range.
In essence, the coil forms half of a Wheatstone Bridge circuit, while the other half of the bridge is
formed by a potentiometer of similar electrical characteristics built into the proportioning motor and
driven by the motor shaft.
When the contact finger is located at the low end of the potentiometer coil as in process start-up,
the motro drives the device to the fully open position.
With the contact finger at the high end of the coil, the motor moves the drive to the fully closed position.
Printable Literature
Data Sheet
RFHTT
Dual Recording Thermometer
Overview / Design Principle:
This unit is a dual recording thermometer designed to sense and record temperature from two separate
locations simultaneously on a single chart. The case contains two pen mechanisms with individual thermal
sensing elements. The pens operate on 1/12 revolution of the chart, for example 2 hours per 24 hour rotation
to prevent possible interference when both sensed termperatures happen to coincide. Flush or wall mount
available (brackets supplied). Available in 12 ranges from -30°F to 1100°F.
Operation:
This unit consists of a chart drive either electrically driven or spring wound. This chart drive rotates
a 10" chart on which two independent pens mark temperature. The mechanism pens function as a result of the
Piston Pak expanding or contracting due to termperature change.
Printable Literature
Data Sheet
RFH15-79/15-15
Dual Recording Temperature Control
Overview / Design Principle:
This dual instrument controls and records two temperature variables on a single chart. It is ideal for
temperature and humidity controlled applications such as growth chambers, smokehouses and kilns. The unit
is made up of two switch mechanisms. UL and CSA listed. Flush or wall mount available (brackets supplied).
Operation:
The unit is a mechanical, recording controller that incorporates two independent control switching
systems in a single case. To avoid interference, the two pens register a difference on one-twelth revolution
of the chart, or a two hour differential on a 24 hour chart. Control points are indicated by a red setting
pointer on the right hand mechanism, a green pointer on the left.
There are two control switches mounted on each mechanism, they are mounted one behind the other.
First switch to be actuated on a termperature rise is the leaf-type switch. The second switch (a pin
type for left mechanism and a leaf type for the right mechanism) is actuated when the recorded
temperature exceeds the operation of the first switch. Temperature actuation points between the
two switches (differential) is adjustable from 0 to 5% of scale range, with tolerance on switch
setting ±1/2%, adjustment is made by set screws inside the instrument case.
Printable Literature
Data Sheet
RFC15-52
Recording Temperature Programmer
Overview / Design Principle:
This instrument is a recorder with a two switch control mechanism which provides automatic temperature programming
by use of a pre-cut plastic cam. It is used when two temperatures separated by not more than 5% of scale range are
specified as control points. The instrument contains two internally-mounted three-wire thermostatic relays. Wall
mounted (brackets furnished) or flush mounts. CSA listed.
Operation:
Control point of the RFC15-52 is determined by a cam-follower which rides the edge of a revolving pre-cut cam
and postiions the snap-acting switches in accordance with the program for which the cam is shaped. Cam is configured
and fabricated by end user.
Switches are actuated by the same termperature-responsive mechanism which moves the recording pen, operating at
preselected points in relation to the center line of the cam follower roller.
First switch to be actuated on a temperature rise is the leaf-type #15 if normal sensitivity. Second is a
super-sensitive #52 pin type, actuated only when the recorded temperature exceeds the operating point of the first switch.
Printable Literature
Data Sheet
RFHAA
Dual Recording Pnematic Temperature Control
Overview / Design Principle:
This unit is designed to control pneumatically can record two separate temperature variables on a common
chart. Relative humidity can be governed through the control of wet and dry bulb temperatures. Two independent
control systems in a single case. Humidity and temperature control, output 3-15 psi. Manual reset adjustment
with adjustable throttling range 5-25%.
Operation:
The dual RFHAA operates air powered throttling valves regulating the flow of steam, water or gas or actuates
other pneumatic devices such as pressure switches or relays. Wet and dry bulbs are recorded when it is used to
control temperature and relative humidity.
Two instruments with independent pen arms comprise the control. Pen arms are set at two-hour time differential
on a 24 hour chart to prevent interference when recording at or near the same control temperature.
Pen arms move up or down scale in response to the expansion or contraction in the thermal sensing element.
As a pen arm enters the throttling range an approaches set point, it changes the effective orifice size in its
control mechanism's bleed valve.
The control produces an outpu pressure of 3 to 15 psi, approximately 16 psi input pressure is required to
obtain this range. Throttling span is adjustable within the extreme of 5 to 15% of the scale range.
Load arm, inherent in throttling controls, is compensated by a manual reset adjustment.
Printable Literature
Data Sheet
RFCP
Recording Temperature Control
Overview / Design Principle:
This instrument is a recorder which utilizes a potentiometer-type contolling mechanism which
provides automatic temperature programming by use of a pre-cut plastic cam. It governs proportional
positioning motors which operate modulating valves, damper systems, or electric multi-state systems
where extremely close sensitive or straigh-line control is required. The instrument automatically
positions any of a wide variety of standard motor operators to provide precise temperature control
without the sawtooth line characteristics of conventional on-off control. CSA listed.
Operation:
Control point of the RFCP is determined by a cam-follower which rides the edge of a revolving
pre-cut cam and postiions the potentiometer in accordance with the program for which the cam is shaped.
Cam is configured and fabricated by end user.
The pen arm, which moves up or down scale in response to the expansion and contraction in the
thermal sensing element, also slides the contact finger along the potentiometer coil within the
modulating range. In essence, the coil forms half of a Wheatstone bridge circtui, while the
other half of the bridge is formed by a potentiometer of similarly electric characteristics
built into the proportioning motor and driven by the motor shaft. A detector relay, either
incorporated into the proportioning motor or operating as a separate unti, detects any
inbalance in the Wheatstone bridge caused by a change in control temperature and drives
the proportioning motor in the direction necessary to regain a balanced bridged circuit.
The shaft fo teh proportioning motro is connected through linkage to the device which
controls the process fuel flow or temperature variable. When the contact finger is located
at the low end of the potentiometer coil, the motor drives the device to the fully open
position. When the contact finger at the high end of the coil, the moteor moves the
divide to the fully-closed position.
Resistance of the potentiometer coil to the Model RFCP should match that of the coil in the positioning motor.
Printable Literature
Data Sheet
RFC52
Recording Temperature Programmer
Overview / Design Principle:
This instrument is a recorder with a mechanism that has single switch control capability
which provides automatic temperature programming by use of a pre-cut plastic cam. An
internally-mounted three-wire thermostatic relay insures extremely long switch life and
often eliminates the need for an external conductor. Wall mounted (brackets furnished)
or flush mounted. CSA listed.
Operation:
Control point of the RFC52 is determined by a cam-follower which rides the edge of
a revolving pre-cut cam and postiions the snap-acting switch in accordance with the program
for which the cam is shaped. Cam is configured and fabricated by end user.
The switch is actuated by the same temperature responsive mechanism which moves the
recording pen, actuated when the pen point is at the center line of the cam follower,
the switch operates the three-wire thermostatic relay which handles the load.
Printable Literature
Data Sheet
Series 1000 1/4
DIN Analog Controller/Limit Device
Overview / Design Principle:
The Series 1000 are versatile analog controllers designed for rugged, reliable, low cost control of process
variables in harsh industrial environments, even those plagued by environmental electronic noise.
Available as a non-indicating analog on/off controller or high or low limit device, it offers a quality
level not commonly found in comparably priced devices. It is a 1/4 DIN instrument with a depth of only 5.8
inches. All versions are UL recognized and CSA certified as controllers and limit devices are FM approved.
The Series 1000 can accommodate J, K, T, R, B, and S thermocouples. Outputs are either SPST or SPDT
electro-mechanical relay or solid state relay drivers.
Features and Benefits:
• Non-display, easy dial setting
• 1/4 DIN panel mount
• Thermocouple input
• Sensor fault detection
• Relay or SSR driver output
• High or Low Limit or On/Off control
Printable Literature
Data Sheet
