TPS Tenney TUJR User manual

Order Number: 113119
Revision Date: 01-25-15
Operation and Maintenance Manual
Tenney Junior
Environmental Test
Chambers
Models TJR/TUJR
Model TJR
Model TUJR

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such release, disclosure or use.

Table of Contents
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Table of Contents
1.0 INTRODUCTION ......................................................................................................................................... 1
1.1 C ONTACT I NFORMATION ........................................................................................................................................... 1
1.2 P ARTS AND S ERVICE I NQUIRES .................................................................................................................................... 1
1.3 T ECHNICAL S PECIFICATIONS ....................................................................................................................................... 2
2.0 SAFETY ...................................................................................................................................................... 3
2.1 S YMBOLS ............................................................................................................................................................... 3
2.2 W ARNINGS ............................................................................................................................................................. 4
3.0 SYSTEM OVERVIEW .................................................................................................................................... 6
3.1 A PPLICATION .......................................................................................................................................................... 7
E NVIRONMENTAL C ONDITIONING F UNCTIONS ....................................................................................................... 7
3.2 H EATING -A LL M ODELS ............................................................................................................................................. 8
H EATER C ONTROL ............................................................................................................................................ 8
3.3 C OOLING -A LL M ODELS .............................................................................................................................................
C APILLARY T UBE C ONTROL D ESCRIPTION ............................................................................................................ 11
L OW S TAGE D ESCRIPTION ............................................................................................................................... 11
H IGH S TAGE D ESCRIPTION ............................................................................................................................... 11
R EFRIGERANT F LOW ....................................................................................................................................... 11
3.4 S AFETY D EVICES .................................................................................................................................................... 11
L OW P RESSURE C UT -I N S WITCH PS2 AND T IMER 1TDR ....................................................................................... 11
H IGH P RESSURE C UT -I N S WITCH PS1 ................................................................................................................ 12
C OMPRESSOR M OTOR O VERLOADS ................................................................................................................... 12
3.5 A IR C IRCULATION .................................................................................................................................................. 12
3.6 O VER T EMPERATURE P ROTECTION ............................................................................................................................ 13
3.7 W ATLOW F4 T EMPERATURE C ONTROLLER ................................................................................................................. 14
F EATURES .................................................................................................................................................... 14
D ISPLAYS ..................................................................................................................................................... 14
I NDICATOR L IGHTS ......................................................................................................................................... 14
K EYS ........................................................................................................................................................... 15
D ATA C OMMUNICATIONS ................................................................................................................................ 15
C ONTROLLER C ONFIGURATION ......................................................................................................................... 15
4.0 OPTIONS ................................................................................................................................................. 16
4.1 B OOST H EAT ........................................................................................................................................................ 16
4.2 D RY A IR P URGE S YSTEM ......................................................................................................................................... 16
O PERATION .................................................................................................................................................. 16
D RY A IR E QUIPMENT D ESCRIPTION ................................................................................................................... 16
4.3 GN
2
P URGE S YSTEM .............................................................................................................................................. 18
4.4 LN
2
B OOST C OOLING S YSTEM .................................................................................................................................. 1
O PERATION .................................................................................................................................................. 1

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Table of Contents
4.5 CO
2
B OOST C OOLING S YSTEM ................................................................................................................................. 21
O PERATION .................................................................................................................................................. 21
4.6 TEMPGARD IV IV A LARM AND S HUTDOWN C IRCUIT .................................................................................................. 22
4.7 I NTRINSICALLY S AFE I NTERIOR D ESIGN ....................................................................................................................... 23
O VERVIEW ................................................................................................................................................... 23
I NTRINSIC D ESIGN F EATURES ............................................................................................................................ 23
S HEATHED ELECTRICAL HEATERS ........................................................................................................................ 23
H EATER S URFACE T EMPERATURE C ONTROL ........................................................................................................ 24
W ATLOW LV L IMIT C ONTROLLER ...................................................................................................................... 25
L OSS OF A IRFLOW .......................................................................................................................................... 25
N ON -S PARKING C ONDITIONER F AN D ESIGN ........................................................................................................ 25
I NTRINSIC S AFETY B ARRIERS ............................................................................................................................. 26
E XPLOSION P ROOF INTERNAL L IGHT F IXTURES ..................................................................................................... 26
E XPLOSION R ELIEF ......................................................................................................................................... 26
4.8 D ATA AND C OMMUNICATIONS P ORTS ....................................................................................................................... 28
RS-485 I NTERFACE ........................................................................................................................................ 28
E THERNET C OMMUNICATIONS P ORT ................................................................................................................. 28
IEEE C OMMUNICATIONS P ORT ........................................................................................................................ 28
4. L INK T ENN 32 S OFTWARE ......................................................................................................................................... 2
4.10 C HART R ECORDER .................................................................................................................................................. 30
5.0 INSTALLATION ......................................................................................................................................... 31
5.1 D ELIVERY AND U NCRATING OF U NIT .......................................................................................................................... 31
5.2 L OCATION AND I NSTALLATION OF U NIT ...................................................................................................................... 31
5.3 A IR S UPPLY C ONNECTION ........................................................................................................................................ 32
F LOW A DJUSTMENTS ...................................................................................................................................... 32
5.4 GN
2
C ONNECTION ................................................................................................................................................. 33
F LOW A DJUSTMENT ....................................................................................................................................... 33
5.5 LN
2
C ONNECTION .................................................................................................................................................. 34
LN
2
F LOW A DJUSTMENT ................................................................................................................................. 35
5.6 CO
2
C ONNECTION ................................................................................................................................................. 36
5.7 P OWER S UPPLY S PECIFICATIONS AND C ONNECTION ...................................................................................................... 37
5.8 P OWER C ONNECTION ............................................................................................................................................. 37
M AKING THE P OWER S UPPLY C ONNECTION TO THE C HAMBER ............................................................................... 38
A PPLICATION OF P OWER ................................................................................................................................. 3

Table of Contents
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6.0 OPERATION ............................................................................................................................................. 40
6.1 S TANDARD C ONTROL P ANEL .................................................................................................................................... 40
6.2 S TANDARD O PERATION P ROCEDURE .......................................................................................................................... 41
6.3 O PERATION WITH T EMPGARD IV IV I NSTALLED ........................................................................................................... 42
6.4 O PERATION P ROCEDURE ......................................................................................................................................... 42
A LARMS ....................................................................................................................................................... 43
6.5 T EMPGARD IV IV A LARM S ETPOINT E NTRY –WATLOW EZ ........................................................................................... 44
A LARM S ETPOINT E NTRY P ROCEDURE ................................................................................................................ 44
A LARM C ONDITIONS ...................................................................................................................................... 44
S AVING AND R ESTORING U SER S ETTINGS (C OPIED FROM THE W ATLOW L IMIT C ONTROLLER M ANUAL ) .......................... 45
7.0 PREVENTIVE MAINTENANCE ..................................................................................................................... 45
7.1 M AINTENANCE C HECKS /P ROCEDURES ....................................................................................................................... 45
7.2 P REVENTATIVE M AINTENANCE S CHEDULE / L OG .......................................................................................................... 47
8.0 TROUBLES OOTING ................................................................................................................................. 48
9.0 MAINTENANCE AND SERVICING................................................................................................................ 51
.1 R EFRIGERATION S YSTEM ......................................................................................................................................... 51
I NTRODUCTION ............................................................................................................................................. 51
H ISTORY ...................................................................................................................................................... 51
H OW I T W ORKS ............................................................................................................................................ 51
9.1.3.8 L OAD L IMIT S WITCH ................................................................................................................................... 53
L EAK T ESTING ............................................................................................................................................... 53
T ESTING BY S TATIC C HARGE ............................................................................................................................. 53
E VACUATION ................................................................................................................................................ 54
C HARGING A L OW S TAGE ................................................................................................................................ 54
.2 S PARE P ARTS ........................................................................................................................................................ 55
.3 T HERMAL C UTOFF R EPLACEMENT ............................................................................................................................. 55
10.0 DRAWINGS AND OEM MANUALS .............................................................................................................. 56
OEM M ANUALS ........................................................................................................................................... 56

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Tenney Junior Test Chambers-Models TJR and TUJR
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1.0 Introduction
Congratulations on purchasing a chamber from one of the fine divisions of Thermal Product Solutions. Your
chamber has been designed to operate with the reliability you expect for the demands you impose on your
product and research testing. We truly hope that every aspect of chamber design and quality will measure up
to your strictest standards.
Headquartered in New Columbia, Pennsylvania, Thermal Product Solutions includes the following five
divisions that manufacture environmental test chambers, industrial ovens, and furnaces. The Blue M,
Gruenberg, Tenney, and Lindberg divisions are located in New Columbia, Pennsylvania, which is in the
North-Central part of the state. MPH is located in Riverside, Michigan.
1.1 Contact Information
Mailing Address: Thermal Product Solutions
PO Box 150
White Deer, PA 17887
Physical Address: Thermal Product Solutions
2821 Old Route 15
New Columbia, PA 17856
Main Number: 570 - 538 - 7200 Toll Free Number: 1 - 800 - 586 - 2473
Fax-Parts Department: 570 - 538 - 7385 Fax-Service Department: 570 - 538 - 7391
Fax-Main: 570 - 538 - 7380
Website: www.thermalproductsolutions.com
1.2 Parts and Service Inquires
Your equipment has been designed and manufactured to provide years of reliable service. In the event a
component should fail, it is recommended that only OEM approved parts be used as replacements. Please
contact the Parts Department for component replacement, or repair.
Parts and service inquiries for equipment within each division should be directed to Thermal Product
Solutions by any of the following methods.
Important! Please have the Model and Order Numbers of your unit available when contacting us.
Model No. Order No.
MADE IN THE USA!

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Tenney Junior Test Chambers-Models TJR and TUJR
1.3 Technical Specifications
This table shows the major mechanical, electrical and environmental specifications for this unit.
Unit Type
Model Numbers: Model TJR Tenney Junior - Benchtop Unit
Model TU-JR Tenney Junior - Upright Unit
Mechanical
Shipping Weight: 260 lbs.
Internal Capacity: 16" W x11" D x12" H = 1.22 Ft
3
(406.4 W x279.4 D x304.8 H
Millimeters)
Electrical
Standard Chambers 120 V, 16 A, 60 Hz, 1 PH
CE Marked Chambers 220 V, 13 A, 50 Hz, 1 PH
Environmental
General •Indoor use only.
•Facility temperature range of 5°C to 30°C (max).
•Maximum relative humidity 90%.
Operating Temperature: - 75 to + 200 °C, ± 0.3 °C
Note: This manual may also apply to special chambers with alternate
model numbers (listed below).
For special Model XXXX, O/N xxxxx, the following custom temperature
specifications apply:
Temperature Range:- xx° to + xxx° C, +/- xx deg. after stabilization
T HE LISTED CHAMBER SPECIFICATIONS ARE BASED ON OPERATION AT 24° C AMBIENT TEMPERATURE ,
ALTITUDE AT SEA LEVEL , AND A 60 H Z POWER SUPPLY . C HAMBER OPERATION UTILIZING A 50 H Z POWER
SUPPLY MAY DE - RATE THE LISTED PERFORMANCE SPECIFICATIONS .
Option Specifications
Compressed Air Supply 80 PSIG min. to 100 PSIG max.
GN
2
Supply Up to 100 psig
LN
2
Supply Up to 40 psig
CO2 Supply Up to 1000 psig

Tenney Junior Test Chambers-Models TJR and TUJR
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2.0 Safety
It is important that you read and understand all Warning statements listed throughout the manual!
2.1 Symbols
Various symbols are used throughout the manual to alert the reader to a potentially dangerous situation.
Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury
Indicates that there is a voltage at this point that may be a hazard.
Indicates that there is a grounding point at this location.
Provides additional information on a particular topic.
WARNING OF ELECTRIC HAZARD INSIDE

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Tenney Junior Test Chambers-Models TJR and TUJR
2.2 Warnings
1. Read this entire Operation Manual, as well as the vendor manuals and cut-sheets provided before
operating this equipment! Failure to adhere to any Safety Warning, or failure to follow the proper
operating procedures listed throughout any of the information provided, could cause damage to your
equipment, personal injury, or death.
2. Obey all “CAUTION”, “DANGER”, and “WARNING” signs / labels mounted on the equipment. Do not
remove any of these signs / labels.
3. Do not use this equipment in any manner not specified in this manual. Improper use may impair the
safety features employed and will void your warranty.
4. Operators and service personnel must be familiar with the location and function of all controls and
the inherent dangers of the equipment before operating or maintaining it.
5. Only qualified service personnel should ever be permitted to perform any service-related procedure
on this equipment!
6. Warning! This chamber is NOT designed for use with volatile or explosive materials unless
specifically stated in your purchase order. The air conditioning section contains open wire heating
elements, which can attain temperatures sufficiently high to ignite gas vapors. Do not install test
articles that may release explosive or flammable vapors in the chamber. Loading of such materials
may result in explosion or fire.
7. Chamber Classification is NFPA 86 Class B: NFPA 86 Class B chambers / ovens are heat
utilization equipment operating at approximately atmospheric pressure wherein there are no
flammable volatiles or combustible material being heated in the oven.
8. Do not place the unit near combustible materials or hazardous fumes or vapors.
9. Do not install unit in a corrosive environment. A corrosive environment may lead to poor performance
and deterioration of unit.
10. Make sure the chamber and any remote equipment provided are leveled when installed. The
chamber door may swing shut on personnel if unit is tilted.
11. A main power disconnect switch may not be provided with your unit. If not provided, we
recommend that a fused disconnect switch on a separate branch circuit be installed as the
power source in accordance with all National and Local Electrical Codes. If your unit is equipped with
a power cord and plug, you must utilize a receptacle with the appropriate rating, which is on a branch
circuit of its own.
12. Do not position the chamber in a manner that would make it difficult to operate your main power
disconnect switch.
13. Your power supply line voltage may be too low or too high to properly and safely operate your
equipment. Before making the power supply connection to your equipment, you must follow the
specific directions stated under “Power Connection” in the Installation Instructions section. Failing to
perform the directions stated may damage your equipment and void your warranty!
14. Control panels, gauge boxes, the conditioning compartment, etc., contain exposed electrical
connections. Keep panels in place properly when the unit is in operation. Disconnect and Lock-Out /
Tag-Out all electrical power from the unit at its source before servicing or cleaning.

Tenney Junior Test Chambers-Models TJR and TUJR
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15. Refrigerant under high pressure is used. Only qualified refrigeration mechanic personnel should ever
be permitted to perform any service-related procedure on the refrigeration system.
16. Do not adjust any mechanical components such as refrigeration valves or any electrical components
except as directed in this manual.
17. Human exposure to temperature extremes can cause injury. Do not open the chamber door until
chamber temperature drops below 200°F (93°C), when applicable. Take appropriate precautions
before opening oven doors and upon handling any chamber contents.
18. Do not modify any component on this unit. Use only original equipment manufacturer (OEM) parts as
replacement parts. Modifications to any component, or the use of a non-OEM replacement part could
cause damage to your equipment, personal injury, or death.
19. Do not overload the floor of the chamber workspace or load the unit unevenly.
20. Do not stand on the roof of the chamber. The roof is not designed to withstand additional weight.

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Tenney Junior Test Chambers-Models TJR and TUJR
3.0 System Overview
Control Panel
Machinery
Compartment
Figure
1
Model TUJR Front View
Figure
2
Model TJR Front View
Chamber
Workspace
Control Panel
Machinery
Compartment
Chamber
Workspace Machinery
Compartment

Tenney Junior Test Chambers-Models TJR and TUJR
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3.1 Application
The Tenney Junior family of environmental test chambers are innovative reach-in types that provide a wide
range of temperature conditioning with a set of diverse optional conditioning equipment. This manual applies
to the following models in the Tenney Junior family which employ the Watlow F4 profiling type controller.
Environmental Conditioning Functions
•Heating of the chamber is achieved by recirculating chamber air through low-mass, open-air
nichrome wire heater elements in the conditioning plenum. The plenum is located in the chamber
ceiling and is isolated from the workspace to prevent direct heat radiation.
•For Intrinsically Safe Interior Designs (TJR-INS) only, heating of the chamber is achieved by
recirculating chamber air through a sheathed, low-watt density finned heater in the conditioning
plenum.
•Cooling of the chamber is achieved by recirculating chamber air through a refrigerated cooling coil in
the conditioning plenum. A cascade type refrigeration system is used with Non-CFC refrigerants.
•Air circulation is generated by a propeller type fan, which is driven by an externally mounted motor.

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Tenney Junior Test Chambers-Models TJR and TUJR
3.2 Heating-All Models
Heating of the chamber is achieved with the use of open air low mass nichrome wire heating elements.
These elements have low thermal lag and provide rapid response to the controller's demands. The elements
are configured in a serpentine pattern within stainless steel racks and are supported with ceramic insulators.
Heater racks are installed in the conditioning plenum. This isolates them from the workspace and prevents
direct radiation to the product. Electric power ratings for your chamber's heater bank are listed on the Power
Schematic.
Heater Control
The heaters are controlled by a time proportioned output from the main controller. This output energizes a
solid state relay, which provides power to the electric heaters.
Figure 3 Electrical Heater Rack-Bottom View
Refrigeration
Cooling Coil
Heater Elements

Tenney Junior Test Chambers-Models TJR and TUJR
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3.3 Cooling-All Models
Cooling of the chamber is achieved by re-circulating chamber air through a refrigerated cooling coil in the
chamber conditioning plenum. Non-CFC refrigerants are used.
The chamber is equipped with a cascade refrigeration system that uses capillary tube type refrigerant
metering to the cooling coils. Two 1.0 HP hermetic compressors are employed in a cascade design,
consisting of a low-stage and a high-stage system. A cascade condenser is used in the low stage, where the
low stage refrigerant is cooled and condensed by high stage refrigerant. This highly efficient design permits
extreme low temperatures to be attained. An air-cooled condenser is used in the high stage. Refrigeration
System Description
The main design features of this cascade refrigeration system include capillary tube type refrigerant control
and the use of ½ HP hermetic compressors.
This is a multiple refrigeration system consisting of a low stage and a high stage system. These systems are
integrated to efficiently provide very low temperature levels. This is achieved by utilizing a cascade
condenser in the low stage, where low stage refrigerant is cooled and condensed by high stage refrigerant.
The cooled low stage refrigerant now has greater cooling capacity in the chamber evaporator coil. An air-
cooled condenser is used in the high stage.
Figure 4 TJR Refrigerant System
Air-Cooled
Condenser
Low Stage
Compressor High Stage
Compressor
Pressure
Switch PS1
Pressure
Switch PS2

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Tenney Junior Test Chambers-Models TJR and TUJR
Low Stage
Compressor High Stage
Compressor
Air-Cooled
Condenser
Figure
5
TJR Refrigerant System
-
Rear View
Pressure
Switch PS1

Tenney Junior Test Chambers-Models TJR and TUJR
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Capillary Tube Control Description
This system employs capillary tube type refrigerant control. A long length of seamless copper tubing with a
small internal diameter is used to feed the evaporator coil. The tube acts as an automatic throttle in
controlling refrigerant pressure and flow to the evaporator. With the compressor running, a high pressure is
maintained on the inlet to the capillary tube, and a low pressure is maintained in the evaporator. The
pressures will balance when the compressor is turned off. This places a low starting load on the compressor
motor when turned back on. A fine filter or filter-drier is provided at each capillary tube inlet to remove
moisture and dirt from the refrigerant.
Low Stage Description
The low stage system includes the compressor, the cascade condenser, an expansion tank, and the
evaporator coil located in the chamber conditioning section.
Refrigerant flow in the low stage is from the compressor as a hot compressed gas and then through a
desuperheater where most of the heat of compression is removed. The desuperheater is part of the high
stage air cooled condenser. As a cooled gas, it then flows to the cascade condenser where it condenses to
liquid form by heat exchange with circulating high stage refrigerant. The liquid refrigerant flows through a
drier assembly, and is metered through a capillary tube to the evaporator cooling coil in the chamber
conditioning section. Warm chamber air circulates through the cooling coil, and heat exchange occurs as the
liquid refrigerant boils, vaporizes, and absorbs heat. The vaporized refrigerant returns to the compressor
through the suction line. The cycle is repeated.
High Stage Description
The high stage system includes the compressor, an air cooled condenser, and a suction line accumulator to
guard against liquid refrigerant return to the compressor.
Refrigerant Flow
Refrigerant flow in the high stage is from the compressor as a hot compressed gas, to the air cooled
condenser where the gas cools and condenses to liquid form. It then flows to the cascade condenser, being
metered by a capillary tube. In the cascade condenser, high stage refrigerant absorbs heat from the
circulating low stage refrigerant. As it absorbs heat, the high stage refrigerant boils and vaporizes. It then
returns to the compressor through the suction line accumulator SLA. The cycle is repeated.
3.4 Safety Devices
Low Pressure Cut-In Switch PS2 and Timer 1TDR
In order to prevent both compressors from hitting the power line at the same time, Low Pressure Cut-In
Switch PS2 and Digital Timer 1TDR are provided to delay the start-up of the low stage compressor. The high
stage compressor will start first when cooling is demanded by the main controller. PS2 monitors the suction
pressure in the high stage compressor suction line. PS2 will close when the suction pressure reaches 20
PSIG, which involves a short delay. In order to insure that PS2 is closed before the low stage compressor is
permitted to start, a 30 second On-delay is programmed into 1TDR. 1TDR contacts will close after the delay
to start the low stage compressor. 1TDR is mounted inside the control panel.

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Tenney Junior Test Chambers-Models TJR and TUJR
High Pressure Cut-In Switch PS1
An Artificial Loading solenoid valve SV will be energized by the High Pressure Cut-in Switch PS1 when low
stage compressor head pressures reaches 280 PSI. This action dumps refrigerant into the expansion tank
for storage until the pressure drops to 220 PSI.
Compressor Motor Overloads
A motor overload protective device is installed in the windings of each compressor, which will open if the
motor windings exceed a preset temperature. Probable causes are insufficient refrigerant flow across the
motor due to a refrigerant loss, or a failure of the liquid injection valve provided for suction gas cooling. The
motor overload will automatically reset and restart the compressor after the motor has cooled.
NOTE: Please reference the section entitled “Servicing Cascade Refrigeration Systems” for a more detailed
description.
3.5 Air Circulation
Tenney Junior Test Chambers are provided with an efficient vertical-down airflow system that maintains
maximum temperature uniformity.
Air Circulation
Conditioning Plenum
Conditioned
Air Output
Heat Limiter
RTD Sensor
Figure 6 Air Circulation

Tenney Junior Test Chambers-Models TJR and TUJR
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Chamber air is conditioned in the ceiling plenum where the circulation fan, heater elements, and refrigeration
coil are located. A propeller type fan driven by an externally mounted motor generates airflow. The plenum
cover prevents direct heat radiation to the workspace.
Process air is drawn up into the left side of the plenum. It flows through the heater elements and the
refrigeration coil, and is discharged by the fan down into the workspace to condition the product. The cycle
repeats. A 100 ohm Platinum RTD sensor mounted below the fan measures the conditioned air temperature.
3.6 Over Temperature Protection
Chamber over temperature protection is provided with a thermal cutoff.
This is an axial leaded one-shot protection device that is mounted in a small
white ceramic terminal block. For chambers with a top temperature limit of 200
degrees C, the Heat Limiter is designed to open when the surrounding
temperature reaches 240 degrees C. For chambers with a lower temperature
limit, either an alternate thermal cutoff will be used, or the Watlow LV Limit
Controller will be used.
Heater Refrigeration
Coil
Heat
Limiter
RTD Sensor
Figure 7 Conditioning Plenum
Figure 8 Thermal
Cutoff

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Tenney Junior Test Chambers-Models TJR and TUJR
3.7 Watlow F4 Temperature Controller
Features
Temperature conditions may be controlled with the standard Watlow F4 Controller. The WF4 is a powerful ¼
DIN profiling type controller with the following features.
Single Channel
Profiling: Forty Profiles, 256 Steps
Automatic & Manual Control
1 Input: Universal Type (RTD is Std.)
4 Digital Inputs
2 Auxiliary Analog Inputs - Optional
2 Control Outputs: Time Proportioned, On/Off, or 4-20 ma
2 Alarm Outputs
8 Digital Event Outputs
2 Retransmit Outputs - Optional
Communications: EIA-232 and EIA-485 with Modbus RTU
protocol
Displays
PV Display: (Upper Display) Process Value. Error information when applicable.
LCD Display: (Lower Display) 4 line display shows information about setup, operation, and
programming. A cursor (>) indicates the selected parameter or present value in memory. Cursor moves
via the 4 navigation keys.
Scroll Bar: (Within LCD Display) Appears when the Up or Down Keys can reveal more information in
the LCD Display.
Indicator Lights
1A, 1B, 2A, 2B: Lights when the corresponding controller channel output is active.
Alarm 1 & 2: (Bell #1 and Bell #2 graphics) Lights during an alarm state.
Communications: (Phone graphic) Lights (pulsates) when the controller sends or receives valid data.
Profile Indicator: (Chart-line graphic) Run / Hold Status. Lights when a ramping profile runs. When
blinking, the profile is on hold. When not lit, operates as a static set point controller.
Figure
9
Watlow F4 Temperature
Controller