TestEquity 1016S Operation manual

Copyright © 2013-2019 TestEquity LLC Rev. 2.2 – December 18, 2019
Model 1016S & 1027S
Temperature Chamber
1016S all serial numbers
1027S serial number 70319 and above
Operation and Service Manual
TestEquity LLC
6100 Condor Drive
Moorpark, CA 93021
Support: 877-512-3457 Toll Free
805-480-0638
Corporate: 800-732-3457
805-498-9933
http://www.testequity.com

Table of Contents
Chapter 1 – Safety Instructions________________________________________________ 1-1
Introduction ____________________________________________________________________1-1
Installation Safety Notices _________________________________________________________1-1
Operation Safety Notices __________________________________________________________1-2
Chapter 2 – Installation ______________________________________________________ 2-1
Uncrating_______________________________________________________________________2-1
Preparation For Use ______________________________________________________________2-1
Installation Location _____________________________________________________________2-1
Condensate Drain ________________________________________________________________2-2
Input Power Configuration ________________________________________________________2-2
Overview_____________________________________________________________________________ 2-2
230 V / 60 Hz Input Configuration _________________________________________________________ 2-3
208 V / 60 Hz Input Configuration _________________________________________________________ 2-3
Connection to the Power Source ____________________________________________________2-3
Power Source Connection________________________________________________________________ 2-3
Phase Sequence________________________________________________________________________ 2-3
Chapter 3 – Operation _______________________________________________________ 3-1
Introduction ____________________________________________________________________3-1
Summary of Chamber Operation ___________________________________________________3-1
Front Panel Switches and Lights____________________________________________________3-2
Main Disconnect Switch _________________________________________________________________ 3-2
CONDITIONING Switch – ON Mode ______________________________________________________ 3-2
CONDITIONING Switch – EVENT 1 Mode _________________________________________________ 3-2
LIGHT Switch_________________________________________________________________________ 3-2
HEAT Light __________________________________________________________________________ 3-2
COOL Light __________________________________________________________________________ 3-2
Loading the Chamber ____________________________________________________________3-3
Port Plugs ____________________________________________________________________________ 3-3
Performance Considerations ______________________________________________________________ 3-4
Avoiding Moisture _____________________________________________________________________ 3-4
Internal Test Fixtures ___________________________________________________________________ 3-4
Chapter 4 – Limit Controller__________________________________________________ 4-1
Introduction ____________________________________________________________________4-1
Limit Controller Keys and Displays ________________________________________________________ 4-2
How to Set the High and Low Temperature Safety Limits _______________________________________ 4-2
Resetting an Out of Limit Condition________________________________________________________ 4-2
Silencing the Audible Alarm______________________________________________________________ 4-2
Protecting an Energized Test Sample _______________________________________________________ 4-3
Chapter 5 – Purge ___________________________________________________________ 5-1
Introduction ____________________________________________________________________5-1
GN2 (Gaseous Nitrogen) Installation (Option TE-0031) ________________________________________ 5-1
Dry Air Installation (Option TE-0030) ______________________________________________________ 5-1
Purge Operation _______________________________________________________________________ 5-1
Adjusting the Purge Flow ________________________________________________________________ 5-1
Relief Vent ___________________________________________________________________________ 5-1
Chapter 6 – Frequently Asked Questions________________________________________ 6-1
Chapter 7 – Specifications ____________________________________________________ 7-1
Model 1016S Chamber Specifications _______________________________________________7-1
Model 1027S Chamber Specifications _______________________________________________7-2

Table of Contents
Chapter 8 – Maintenance _____________________________________________________ 8-1
Preventive Maintenance Intervals __________________________________________________8-1
Maintenance Procedures __________________________________________________________8-2
How to clean the chamber interior and exterior. _______________________________________________ 8-2
How to listen for abnormal noise or vibration. ________________________________________________ 8-2
How to inspect the door seal. _____________________________________________________________ 8-2
How to inspect the refrigeration machinery compartment. _______________________________________ 8-3
How to verify the chamber performance. ____________________________________________________ 8-4
How to inspect the electrical compartment. __________________________________________________ 8-5
How to clean the condenser. ______________________________________________________________ 8-5
How to verify the calibration. _____________________________________________________________ 8-5
Theory of Operation______________________________________________________________8-6
Troubleshooting _________________________________________________________________8-8
Refrigeration System Charging Instructions _________________________________________8-10
R-404A Charge _______________________________________________________________________ 8-10
Recommended Spare Parts _______________________________________________________8-11
Major Electrical Parts __________________________________________________________________ 8-12
Major Refrigeration Parts _______________________________________________________________ 8-13
General Parts_________________________________________________________________________ 8-13
EZ-Zone Limit Controller Setup Parameters ________________________________________8-14
Setup Menu __________________________________________________________________________ 8-14
Operations Menu______________________________________________________________________ 8-14
Chapter 9 - Warranty________________________________________________________ 9-1
Chapter 10 – Drawings______________________________________________________ 10-1

Chapter 1 – Safety
TestEquity 1016S and 1027S Temperature Chamber Page 1-1
Chapter 1 – Safety Instructions
Introduction
Follow all CAUTION notices to prevent damage to the chamber or your test sample. Failure to
follow all CAUTION notices may void your warranty. CAUTION may also indicate a
potentially hazardous situation which, if not avoided, may result in minor or moderate personal
injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
The safety alert symbol !precedes a general CAUTION or WARNING statement.
The electrical hazard symbol 2precedes an electric shock hazard CAUTION or WARNING
statement.
Installation Safety Notices
!CAUTION: The minimum clearance you should allow for proper ventilation around the
chamber must be at least 12" from both the left and right side, and 24" from
the rear.
!CAUTION: This chamber is designed for operation in a conditioned laboratory
environment. Operation above 30°C (85°F) or below 16°C (60°F) ambient
room temperature is NOT recommended.
!CAUTION: The Input Voltage label on the back of the chamber indicates the input voltage
configuration as shipped from the factory. If the input voltage configuration is
changed, this label must be replaced to reflect the new configuration.
Replacement labels are available from TestEquity at no charge.
!CAUTION: This chamber must be properly configured for either 208 V or 230 V nominal
input. 208 V and 230 V are NOT the same. Do NOT guess! Do NOT assume
you have “220 V”. You must verify the exact type of electrical service you
have. If there is any doubt, you must consult with a qualified electrician who
is familiar with industrial plant wiring. In addition, the input line voltage
should be measured while the chamber is operating in the COOL mode to
ensure that the expected nominal voltage of either 208 V –5/+10% or 230 V
±10% is present. Operation below 198 V or greater than 253 V requires
internal transformers, which can be supplied for a nominal charge.
2CAUTION: This chamber should be connected to the AC power source by a qualified
electrician who is familiar with industrial plant wiring.

Chapter 1 – Safety
Page 1-2 TestEquity 1016S and 1027S Temperature Chamber
Operation Safety Notices
!CAUTION: This chamber has a crankcase heater to protect the high-stage compressor. The
chamber must be connected to the power source AND the Main Disconnect
Switch must be ON for 3 hours prior to operating the chamber. Although it
may be safe to use the chamber immediately, this procedure ensures the
longest possible life for the high-stage compressor if the chamber has been
removed from the power source for more than 24 hours.
!CAUTION: The Temperature Controller’s “Alarm” functions are NOT used in the
chamber’s safety system and are NOT connected. TestEquity does NOT
recommend using the Temperature Controller’s alarm function as the main
protection device. The independent EZ-Zone Limit Controller functions as the
main protection device.
!CAUTION: The EZ-Zone Limit Controller has been properly configured by TestEquity to
match the chamber’s system requirements. Improper modifications to these
setup values can result in unreliable and unsafe operation. Do not attempt to
modify the setup values, unless you thoroughly understand what you are
doing. The correct values are documented in the “EZ-Zone Limit Controller
Setup Parameters” section of this manual.
!CAUTION: Always verify that the Limit Controller’s high and low limits are set to
temperatures that are appropriate for your test sample.
!CAUTION: If your test sample is energized, it may be capable of raising the workspace
temperature beyond safe limits. This could occur if your test sample exceeds
the live load rating of the chamber or if the chamber’s refrigeration system
fails. This chamber has a set of contacts that can be used to remove power to
your test sample if the Limit Controller’s temperature limits are exceeded.
!CAUTION: To prevent damage to your test sample and the chamber’s compressors, do not
exceed the live load rating of the chamber.
!WARNING: Do NOT put items in the chamber that could burn or explode at high
temperatures. This chamber uses open wire heating elements which generate
surface temperatures over 1000ºF. This is NOT an explosion-proof chamber.
!WARNING: Do NOT put items in the chamber which can emit corrosive vapors or
substances.
!WARNING: This chamber is NOT a curing oven. There are NO provisions for venting
fumes.

Chapter 2 – Installation
TestEquity 1016S and 1027S Temperature Chamber Page 2-1
Chapter 2 – Installation
Uncrating
Inspect the shipping container for any signs of visible damage. Notify the carrier and TestEquity
immediately if there are signs of shipping damage.
The pallet is designed with ramps so the chamber can be rolled off without the need for a forklift
or pallet jack.
Preparation For Use
1. Inspect the chamber for signs of shipping damage.
2. Read this entire manual.
3. Select a suitable location to install the chamber.
4. Verify the input voltage configuration.
5. Connect to the power source.
6. Perform following the procedures as described in the Preventive Maintenance section:
a. Inspect the electrical compartment.
b. Inspect the refrigeration machinery compartment.
c. Verify the chamber performance.
Installation Location
The chamber will produce a significant amount of heat during normal operation. Locate the
chamber in a room with adequate ventilation to prevent excessive heat build-up. Allow enough
space around the chamber to permit serviceability and the removal of the service access panels,
which are located on each side and the rear.
The chamber must be on a solid and level floor.
!CAUTION: The minimum clearance you should allow for proper ventilation around the
chamber must be at least 12" from both the left and right side, and 24" from
the rear.
!CAUTION: This chamber is designed for operation in a conditioned laboratory
environment. Operation above 30°C (85°F) or below 16°C (60°F) ambient
room temperature is NOT recommended.

Chapter 2 – Installation
Page 2-2 TestEquity 1016S and 1027S Temperature Chamber
Condensate Drain
The chamber has a condensate drain connection on the rear of the chamber. This provides a way
to remove condensate that may accumulate in the chamber during low-to-high temperature
cycling or when the refrigeration system runs to maintain moderate temperatures. Any time the
ambient air is subjected to temperatures below the dew point, moisture will condense out of the
air. The effect is ice or frost during low temperature operation. When the chamber is heated
above 0°C, the ice or frost will turn into water. The fitting accommodates a ½-inch male pipe
thread. The chamber drain water is not under pressure, and is fed by gravity. Therefore, it must
empty into an open drain. Alternatively, the chamber drain can empty into a condensate pump.
You can purchase a condensate pump from suppliers such as Grainger (www.grainger.com).
Under most circumstances, you will not see any water coming out of the drain.
Input Power Configuration
Overview
This chamber can be easily configured for operation from a 208 V / 60 Hz or 230 V / 60 Hz,
3 Phase nominal input. Other input voltages and 50 Hz operation are available as special options,
and are not covered in these instructions.
Your chamber was configured prior to shipment for the particular voltage that was specified at
time of order. These instructions should be used to verify the input voltage configuration prior to
installation, or to change the input voltage from one configuration to another.
!CAUTION: This chamber must be properly configured for either 208 V or 230 V nominal
input. 208 V and 230 V are NOT the same. Do NOT guess! Do NOT assume
you have “220 V”. You must verify the exact type of electrical service you
have. If there is any doubt, you must consult with a qualified electrician who
is familiar with industrial plant wiring. In addition, the input line voltage
should be measured while the chamber is operating in a continuous HEAT
mode to ensure that the expected nominal voltage of either 208 V –5/+10% or
230 V ±10% is present.
Control
Transformer
TR1
1 2 3 4
208 V - Wire T1 to 3
230 V - Wire T1 to 4
Figure 2-1 – Location of Input Configuration Terminals on the Electrical Sub Panel

Chapter 2 – Installation
TestEquity 1016S and 1027S Temperature Chamber Page 2-3
NOTE: Refer to Figure 2-1 for the location of the input configuration terminals on the electrical
sub panel that are described below.
230 V / 60 Hz Input Configuration
1. Turn the Main Disconnect switch to the OFF position.
2. Remove the lower door retaining screw located on the right side. Open the lower door.
3. Locate the Control Transformer TR1. Wire number T1 must be connected to the 230 V
terminal 4 on Control Transformer TR1.
208 V / 60 Hz Input Configuration
1. Turn the Main Disconnect switch to the OFF position.
2. Remove the lower door retaining screw located on the right side. Open the lower door.
3. Locate the Control Transformer TR1. Wire number T1 must be connected to the 208 V
terminal 3 on Control Transformer TR1.
Connection to the Power Source
2CAUTION: This chamber should be connected to the AC power source by a qualified
electrician who is familiar with industrial plant wiring.
The Main Disconnect Switch on the front panel removes primary power to the entire chamber.
All branch circuits on the load side of the Main Disconnect Switch are individually fused.
However, your local electrical code may require a separate disconnect switch within sight of the
chamber.
Power Source Connection
1. Turn the Disconnect Switch to the OFF position.
2. Remove the lower door retaining screw located on the right side. Open the lower door.
3. Remove the chamber’s right side panel.
4. Mount the input wire through the hole on the rear of the chamber, using an appropriate
bushing. An additional 54-inches of wire will be needed need to reach to the terminals on the
electrical subpanel. The wires will need to pass through the Input Access Hole. This hole is
located in the corner of the partition which separates the compressor compartment from the
electrical compartment. Three tie points are provided on the side of the chamber to secure the
input wiring with provided tie-wraps.
5. Connect the “Hot” input wires to terminals L1, L2 and L3 on the Main Disconnect Switch.
6. Connect the Earth Ground wire (NOT A NEUTRAL) to the Ground terminal.
7. There is NO NEUTRAL connection.
Phase Sequence
This chamber has a protective circuit to ensure the proper input power phase sequence. If the
chamber does not function with the initial wiring hookup, then reverse two of the input lines.

Chapter 3 – Operation
TestEquity 1016S and 1027S Temperature Chamber Page 3-1
Chapter 3 – Operation
Introduction
The Front Panel Switches control power to the chamber. The Front Panel Lights provide
indication of heat and cool functions.
The Limit Controller is a protection device. It turns the chamber OFF if the workspace
temperature exceeds either a high temperature or low temperature limit set point.
The Temperature Controller controls the temperature of the chamber. It can function as either a
single set point controller or as a programmable profile controller. The Temperature Controller
automatically turns the refrigeration system on or off based on the demand for cooling.
Refer to the separate F4T or F4 Temperature Controller manual for details on how to use
the Temperature Controller.
!CAUTION: This chamber has a crankcase heater to protect the high-stage compressor. The
chamber must be connected to the power source AND the Main Disconnect
Switch must be ON for 3 hours prior to operating the chamber. Although it
may be safe to use the chamber immediately, this procedure ensures the
longest possible life for the high-stage compressor if the chamber has been
removed from the power source for more than 24 hours.
Summary of Chamber Operation
1. Turn the Main Disconnect Switch ON.
2. Enter the appropriate high and low temperature safety limits on the Limit Controller.
3. Enter the desired temperature set point (or program) on the Temperature Controller.
4. Load your test sample in the chamber.
5. Turn the CONDITIONING Switch ON. Alternatively, turn the CONDITIONING Switch to
the EVENT 1 position and turn he Power button on the F4T controller ON or EVENT 1 on
the F4 controller ON.

Chapter 3 – Operation
Page 3-2 TestEquity 1016S and 1027S Temperature Chamber
Front Panel Switches and Lights
Main Disconnect Switch
The Main Disconnect Switch controls power to the entire chamber and provides a mechanical
safety interlock to the lower door.
In the ON position (clockwise) primary power is connected. The Temperature Controller, Limit
Controller, and (optional) Chart Recorder are always functional when the Main Disconnect
Switch is ON, regardless of the Master Switch position. The Main Disconnect Switch should be
left ON if the chamber is usually used on a daily basis.
In the OFF position (counter clockwise) primary power is disconnected. The Main Disconnect
Switch can be left OFF if the chamber is not used on a daily basis. It can also be locked in the
OFF position with a padlock. The knob has a red insert that can be pushed in at the top to reveal
the lock-hole.
!CAUTION: This chamber has a crankcase heater to protect the high-stage compressor. The
chamber must be connected to the power source AND the Main Disconnect
Switch must be ON for 3 hours prior to operating the chamber. Although it
may be safe to use the chamber immediately, this procedure ensures the
longest possible life for the high-stage compressor if the chamber has been
removed from the power source for more than 24 hours.
CONDITIONING Switch – ON Mode
The CONDITIONING Switch enables all chamber functions. When the CONDITIONING
Switch is OFF, only the Temperature Controller and Limit Controller are operational. When the
CONDITIONING Switch is ON, the chamber’s temperature conditioning system will function to
maintain the temperature set point. The CONDITIONING Switch does NOT illuminate in any
position.
CONDITIONING Switch – EVENT 1 Mode
When the CONDITIONING Switch is in the EVENT 1 position, you can enable and disable all
chamber functions through the Power button on the F4T Temperature Controller or Event 1
(Digital Output 1) of the F4 Temperature Controller.
LIGHT Switch
The LIGHT Switch controls the workspace light. The LIGHT Switch illuminates when it is ON.
HEAT Light
The HEAT Light will illuminate when the Temperature Controller turns on the heater to
maintain the workspace temperature. The HEAT Light will cycle on/off as the workspace
temperature approaches and reaches the temperature set point.
COOL Light
The COOL Light will illuminate when the Temperature Controller turns on the cooling valve to
maintain the workspace temperature. The COOL Light will cycle on/off as the workspace
temperature approaches and reaches the temperature set point.

Chapter 3 – Operation
TestEquity 1016S and 1027S Temperature Chamber Page 3-3
Loading the Chamber
!WARNING: Do NOT put items in the chamber that could burn or explode at high
temperatures. This chamber uses open wire heating elements which generate
surface temperatures over 1000ºF. This is NOT an explosion-proof chamber.
!WARNING: Do NOT put items in the chamber which can emit corrosive vapors or
substances.
!WARNING: This chamber is NOT a curing oven. There are NO provisions for venting
fumes.
!WARNING: The chamber door must remain closed while the chamber is operating. If you
need to open the door while the chamber is operating, wear safety goggles to
prevent the high velocity airflow from blowing particles or objects into your
eyes.
!WARNING: This chamber operates at extreme temperatures. Avoid contact with air,
objects, and surfaces that are hot or cold to prevent severe burns or frostbite.
Protective gloves are recommended.
!CAUTION: If your test sample is energized, it may be capable of raising the workspace
temperature beyond safe limits. This could occur if your test sample exceeds
the live load rating of the chamber or if the chamber’s refrigeration system
fails. This chamber has a set of contacts that can be used to remove power to
your test sample if the Limit Controller’s temperature limits are exceeded.
!CAUTION: To prevent damage to your test sample and the chamber’s compressors, do not
exceed the live load rating of the chamber.
Live Load Capacity for Model 1016S
Temp +23°C 0°C –10°C –20°C –30°C
Watts 4000 W 2800 W 2300 W 1800 W 1250 W
Port Plugs
Foam port plugs are provided with a gray silicone surface on one side. The port plug must be
inserted with the gray silicone surface facing the inside of the chamber. Port plugs should be
considered expendable and be replaced when they no longer provide a good seal.

Chapter 3 – Operation
Page 3-4 TestEquity 1016S and 1027S Temperature Chamber
Performance Considerations
The performance of all chambers is significantly affected by the characteristics of your test
sample. Factors include size, weight, material, shape, and power dissipation if energized.
The test sample should be placed in the chamber in a manner that allows for air circulation. The
air plenum is located on the back wall of the chamber, where air is sucked in from the bottom
and exits from the top. You should not place the test sample directly on the chamber floor. It
should be placed on the shelf. Multiple test samples should be distributed throughout the
chamber to ensure even airflow and minimize temperature gradients. If necessary, additional
shelves should be used to evenly distribute the load. Verify that the temperature gradients are
within acceptable limits, by measuring the chamber temperature at strategic points using a
multipoint thermocouple meter or data logger.
You may find that the temperature throughout the chamber is even, but always different from
what the temperature controller indicates. The correct way to adjust what the temperature
controller “displays” compared to what is measured at some point other than the controller’s
sensor is with the “Calibration Offset” parameter, NOT by recalibrating the controller.
Avoiding Moisture
Any time the ambient air is subjected to temperatures below the dew point, moisture will
condense out of the air. The effect is ice or frost during low temperature operation, or water
when maintaining over 0°C and cooling is required.
To avoid moisture condensation, make sure the port plugs are inserted at all times. Also, avoid
opening the chamber door while the chamber is operating at temperatures below room ambient.
When a low temperature test is completed, warm the chamber to at least room ambient before
opening the chamber door and before removing your test sample.
Internal Test Fixtures
Some applications require internal fixtures to support test samples and provide a convenient
method of connecting wires and sensors. Fixtures must be designed to minimize their impact on
chamber functionality and performance.
Fixtures should be designed for easy removal to permit maintenance and cleaning of the
chamber. The chamber liner should never be drilled or screwed into. This will compromise the
integrity of the liner and permit moisture migration due to condensation into the insulation,
which will eventually impact performance and lead to premature rusting of the outer cabinet.
Fixtures should be constructed of stainless steel. This also applies to all screws and fasteners. All
welds should be passivated. To prevent rust and corrosion, never use iron or mild steel even if it
is painted or plated. Aluminum may be used. However, since the specific heat of aluminum is
double that of steel, it represents a greater load and will have more impact on the chamber
performance.
Make sure that all connectors, wiring, pc boards, and auxiliary components can withstand the
temperature extremes that they will be subjected to. In some cases, these components may not be
able to last after repeated tests and should be considered expendable.

Chapter 4 – Limit Controller
TestEquity 1016S and 1027S Temperature Chamber Page 4-1
Chapter 4 – Limit Controller
Introduction
The EZ-Zone Limit Controller is a protection device. It turns the chamber OFF if the workspace
temperature exceeds either a high temperature or low temperature limit. You can set these limits
to correspond to the maximum and minimum temperature that your test sample can safely
withstand. This provides protection against someone setting the Temperature Controller to a
temperature that is unsafe for the test sample. It also provides protection in the unlikely event of
a chamber system component failure. The Limit Controller has its own temperature sensor
(thermocouple) and functions completely independent of the Temperature Controller.
This section provides a brief overview on how to operate the Limit Controller. For more detailed
instructions, see the “EZ-Zone User’s Manual”.
!CAUTION: The “EZ-Zone User’s Manual” is a general manual and is written by the
manufacturer, Watlow, for a wide variety of applications and configurations.
Not all features or functions are applicable. Only the capabilities of a model
PM6L1AJ-AAAABAA are applicable.
!CAUTION: The EZ-Zone Limit Controller has been properly configured by TestEquity to
match the chamber’s system requirements. Improper modifications to these
setup values can result in unreliable and unsafe operation. Do not attempt to
modify the setup values, unless you thoroughly understand what you are
doing. The correct values are documented in the “EZ-Zone Limit Controller
Setup Parameters” section of this manual.
!CAUTION: Always verify that the Limit Controller’s high and low limits are set to
temperatures that are appropriate for your test sample.
!CAUTION: If your test sample is energized, it may be capable of raising the workspace
temperature beyond safe limits. This could occur if your test sample exceeds
the live load rating of the chamber or if the chamber’s refrigeration system
fails. This chamber has a set of contacts that can be used to remove power to
your test sample if the Limit Controller’s temperature limits are exceeded.

Chapter 4 – Limit Controller
Page 4-2 TestEquity 1016S and 1027S Temperature Chamber
Limit Controller Keys and Displays
Figure 4-1 – Limit Controller Keys and Displays
How to Set the High and Low Temperature Safety Limits
1. Press the ‰key once to get the [`LL;s] prompt in the lower display. This is the Low Limit
Set Point prompt.
2. Press the ▲or ▼ key to enter the desired Low Limit Set Point in the upper display. Make
sure it is lower than your actual chamber temperature set point, and at least below room
temperature to prevent nuisance tripping.
3. Press the ‰key once again to get the [`lh;s] prompt in the lower display. This is the High
Limit Set Point prompt.
4. Press the ▲or ▼ key to enter the desired High Limit Set Point in the upper display. Make
sure it is higher than your actual chamber temperature set point to prevent nuisance tripping.
5. Press the RESET Key to return to the Home Page.
6. The upper display will show the actual chamber temperature while the lower display will
show [SAFE] as long as the limits are not exceeded.
Resetting an Out of Limit Condition
If the limit is exceeded, the Limit Controller will flash [Li;h1] (high limit) or [Li;L1] (low
limit) in the upper display and [Attn] in the lower display, alternating with the actual chamber
temperature in the upper display and [FAiL] in the lower display. It will also shut down all
chamber functions. The Limit Controller cannot be reset until the temperature returns to within
the limit set points. Then, you must press the RESET or EZ Key to resume normal operation.
Silencing the Audible Alarm
Turning off the MASTER switch on the chamber front panel lets you temporarily turn off the
Audible Alarm, even though the High or Low Limit condition may still exist.

Chapter 4 – Limit Controller
TestEquity 1016S and 1027S Temperature Chamber Page 4-3
Protecting an Energized Test Sample
If your test sample is energized, it may be capable of raising the workspace temperature beyond
safe limits. This could occur if your test sample exceeds the live load rating of the chamber or if
the chamber’s refrigeration system fails.
This chamber has a set of safety contacts that can be used to remove power to your test sample if
the Limit Controller’s temperature limits are exceeded.
The safety contacts are rated as follows:
Resistive: 10 A, 250 VAC or 10 A, 28 VDC
Inductive: 7 A, 250 VAC
To access the safety contacts:
1. Turn the Main Disconnect Switch to the OFF position.
2. Remove the lower door retaining screw located on the right side. Open the lower door.
3. Locate the Terminal Strip on the electrical sub panel. Connections to the safety contacts are
at terminals A1 and A2.
Terminal Strip
A1 A2
Figure 4-2 – Location of Safety Contact Connections on the Electrical Sub Panel

Chapter 5 – Purge
TestEquity 1016S and 1027S Temperature Chamber Page 5-1
Chapter 5 – Purge
Introduction
Optional GN2(gaseous nitrogen) Purge or optional Dry Air Purge can be used to reduce to
possibility of condensation in the chamber at low temperatures.
!CAUTION: Nitrogen cannot be detected by human senses. Nitrogen is non-toxic.
However, if adequate ventilation is not provided, nitrogen will displace air.
This can cause dizziness, unconsciousness or death without warning. The
chamber must be located in a well-ventilated area. Do not open the chamber
door with the GN2flowing.
GN2 (Gaseous Nitrogen) Installation (Option TE-0031)
Connect a supply of GN2 with a maximum pressure of 100 psig to the 1/4-inch FPT fitting which
is designated PURGE on the rear panel.
Dry Air Installation (Option TE-0030)
Option TE-0031 is a prerequisite to provide the purge inlet functionality for Option TE-0030.
Connect the hose from the Dry Air system to the fitting which is designated PURGE on the rear
panel. Connect a supply of compressed air to the 3/8-inch FPT shutoff valve of Dry Air system.
Connect the power cord from the Dry Air system to the DRY AIR POWER socket on the rear
panel. This plug must be twisted clockwise to lock it. The Dry Air system requires 13 cfm of
compressed air at 100 psig (175 psig max).
Purge Operation
The Purge mode is enabled through the Purge button on the F4T Controller or Event 2 (Digital
Output 2) in the F4 Controller.
Adjusting the Purge Flow
A flowmeter is located on the front panel to adjust the flow of purge gas into the chamber. The
flowmeter has a scale, calibrated in SCFM. The flow of purge gas should be adjusted to the
minimum amount required to obtain the desired drying in the chamber for your particular
conditions. A suggested starting setting is 4 SCFM.
Relief Vent
Excess pressure in the chamber workspace is vented through a pressure-relief check-valve,
which is located on the top of the chamber. There is no need to vent this externally.