TestEquity 1016H-2 Operation manual

Copyright © 2014-2018 TestEquity LLC Rev. 1.0 – January 3, 2018
Model 1016H-2
Temperature/Humidity Chamber
With 2x2 HP Compressors
Operation and Service Manual
TestEquity LLC
6100 Condor Drive
Moorpark, CA 93021
Technical Support: 877-512-3457 Toll Free
805-480-0638
Corporate: 800-732-3457 Toll Free
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
Input Power Configuration ________________________________________________________2-2
Overview_____________________________________________________________________________ 2-2
Voltage and Phase Configuration __________________________________________________________ 2-3
Connection to the Power Source ____________________________________________________2-4
Power Source Connection ________________________________________________________________ 2-4
Humidity Water Connection _______________________________________________________2-5
Plumbed Demineralized Water Installation __________________________________________________ 2-5
Water Recirculation System Installation, Model W100 _________________________________________ 2-5
Water Recirculation System Filter Cartridge Replacement ______________________________________ 2-5
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 ____________________________________________________________3-4
Performance Considerations ______________________________________________________________ 3-4
Port Plugs ____________________________________________________________________________ 3-5
Avoiding Moisture (non-humidity mode) ____________________________________________________ 3-5
Internal Test Fixtures ___________________________________________________________________ 3-5
Humidity Operation ______________________________________________________________3-6
Humidity Mode Enable __________________________________________________________________ 3-6
Standard Humidity Range ________________________________________________________________ 3-6
Humidity Mode Considerations ___________________________________________________________ 3-6
Purge Option____________________________________________________________________3-7
GN2 (Gaseous Nitrogen) Installation (Option TE-0031) ________________________________________ 3-7
Dry Air Installation (Option TE-0030) ______________________________________________________ 3-7
Purge Operation _______________________________________________________________________ 3-7
Adjusting the Purge Flow ________________________________________________________________ 3-7
Relief Vent ___________________________________________________________________________ 3-8
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 – Frequently Asked Questions________________________________________ 5-1
Chapter 6 – Specifications ____________________________________________________ 6-1

Table of Contents
Chapter 7 – Maintenance _____________________________________________________ 7-1
Preventive Maintenance Intervals __________________________________________________7-1
Daily or As Needed_____________________________________________________________________ 7-1
Every 3 Months________________________________________________________________________ 7-1
Every 6 Months________________________________________________________________________ 7-1
Every 12 Months_______________________________________________________________________ 7-1
Maintenance Procedures __________________________________________________________7-2
How to Clean the Chamber Interior and Exterior ______________________________________________ 7-2
How to Listen for Abnormal Noise or Vibration ______________________________________________ 7-2
How to Inspect the Door Seal _____________________________________________________________ 7-2
How to Inspect the Refrigeration Machinery Compartment ______________________________________ 7-3
How to Check the Low-Stage Refrigerant Charge _____________________________________________ 7-3
How to Verify the Performance (Non-controlled humidity mode) _________________________________ 7-4
How to Verify the Performance (Controlled humidity mode) ____________________________________ 7-5
How to Inspect the Electrical Compartment __________________________________________________ 7-6
How to Clean the Condenser______________________________________________________________ 7-6
How to Drain the W100 Water Recirculation System Reservoir __________________________________ 7-6
How to Drain the Humidifier _____________________________________________________________ 7-7
How to Verify the Temperature Calibration __________________________________________________ 7-8
How to Verify the Humidity Calibration ____________________________________________________ 7-9
Humidity Sensor Calibration and Maintenance _______________________________________________ 7-9
Theory of Operation_____________________________________________________________7-10
Overview____________________________________________________________________________ 7-10
Air Heating and Safety Systems __________________________________________________________ 7-10
Humidity System______________________________________________________________________ 7-10
Refrigeration System (non-humidity mode) _________________________________________________ 7-11
Refrigeration System (controlled-humidity mode) ____________________________________________ 7-12
Troubleshooting ________________________________________________________________7-13
Refrigeration System Charging Instructions _________________________________________7-15
High-Stage Charge ____________________________________________________________________ 7-15
R-508B Low-Stage Charge ______________________________________________________________ 7-15
Recommended Spare Parts _______________________________________________________7-16
Major Electrical Parts ___________________________________________________________7-17
Major Refrigeration Parts ________________________________________________________7-18
General Parts __________________________________________________________________7-18
EZ-Zone Limit Controller Setup Parameters ________________________________________7-19
Setup Menu __________________________________________________________________________ 7-19
Operations Menu______________________________________________________________________ 7-19
Chapter 8 - Warranty________________________________________________________ 8-1
Chapter 9 – Drawings________________________________________________________ 9-1

Chapter 1 – Safety
TestEquity 1016H-2 Temperature/Humidity 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.
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 1016H-2 Temperature/Humidity 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 F4T/F4 Controller alarms are configured for internal protection of the
humidity system. Do NOT change this configuration under any circumstances.
The independent EZ-Zone Limit Controller functions as the main system and
product 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 or volatile substances.

Chapter 1 – Safety
TestEquity 1016H-2 Temperature/Humidity Chamber Page 1-3
!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.

Chapter 2 – Installation
TestEquity 1016H-2 Temperature/Humidity 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. Check the low-stage refrigeration charge.
e. 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. The chamber
generates a heat load of up to 17,485 BTUH during a continuous cool down from a high
temperature.
The chamber must be on a solid and level floor. 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.
!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 1016H-2 Temperature/Humidity Chamber
Input Power Configuration
Overview
This chamber is designed to be easily configured for operation from a Single Phase or Three
Phase power source, and either 208 V / 60 Hz or 230 V / 60 Hz. 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 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.
Figure 2-1 – Location of Input Configuration Terminals on the Electrical Sub Panel
Disconnect
Switch
Terminal Strip
Control
Transformer
TR1
3 4
Input
L1 L2 L3
T1 T2 T3
Ground
Lug
A
B
C
Power Distribution
Block

Chapter 2 – Installation
TestEquity 1016H-2 Temperature/Humidity Chamber Page 2-3
Voltage and Phase Configuration
NOTE: Refer to Figure 2-1 on the previous page for the location of the input voltage
configuration terminals on the electrical subpanel that are described below.
To access the electrical subpanel, turn the Disconnect Switch to the OFF position. Remove the
lower door retaining screw located on the right side. Open the lower door.
230 V / 60 Hz Input Configuration
Locate the Control Transformer TR1. Wire number TA must be connected to the 230 V terminal
4 on Control Transformer TR1.
208 V / 60 Hz Input Configuration
Locate the Control Transformer TR1. Wire number TA must be connected to the 208 V terminal
3 on Control Transformer TR1.
Single Phase Configuration
1. Locate the Power Distribution Terminal Block. There must be a jumper between terminal
C and A (right side of terminal block). Wire D must connect to terminal B (left side of
terminal block).
2. The input power wires will be connected to L1 and L2 on the top of the Disconnect
Switch. Connect earth ground to the ground lug.
Three Phase Configuration
1. Locate the Power Distribution Terminal Block. Wire D must connect to Power
Distribution Block terminal A (left side of terminal block).
2. The input power wires will be connected to L1, L2, and L3 on the top of the Disconnect
Switch. Connect earth ground to the ground lug.
Figure 2-2 – Power Distribution Block, Phase Configuration Terminals
A
B
C
Three Phase
Wire D to terminal A
A
C
B
Single Phase
Wire D to terminal B

Chapter 2 – Installation
Page 2-4 TestEquity 1016H-2 Temperature/Humidity Chamber
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 strain
relief bushing. Approximately 54-inches of additional wire length 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 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.
Three Phase Input
1. Locate the Disconnect Switch.
2. Connect the “Hot” input wires to terminals L1, L2 and L3 on the Main Disconnect Switch.
3. Connect the Ground wire (NOT A NEUTRAL) to the Ground terminal.
4. Put the chamber side panel back on and close the lower door.
NOTE: The Disconnect Switch and the Disconnect Knob must both be in the off position before
closing the door. Failure to do this will result in damage to the Disconnect Switch and the
Disconnect Knob.
Single Phase Input
1. Locate the Disconnect Switch.
2. Connect the “Hot” input wires to terminals L1 and L2 on the Main Disconnect Switch.
3. Connect the Ground wire (NOT A NEUTRAL) to the Ground terminal.
4. Put the chamber side panel back on and close the lower door.
NOTE: The Disconnect Switch and the Disconnect Knob must both be in the off position before
closing the door. Failure to do this will result in damage to the Disconnect Switch and the
Disconnect Knob.

Chapter 2 – Installation
TestEquity 1016H-2 Temperature/Humidity Chamber Page 2-5
Humidity Water Connection
2CAUTION: The humidity system must be supplied with demineralized water having a
specific resistance of 50,000 to 200,000 ohms/centimeter. The use of
unfiltered tap water or triple-distilled water will damage the humidity system
and chamber interior, and will void the warranty.
Plumbed Demineralized Water Installation
Follow these instructions if your chamber is NOT being used with the optional W100 Water
Recirculation System, and you are connecting to a plumbed source of demineralized water.
1. Attach a supply of demineralized water to the Water Supply fitting on the rear of the
chamber. Water pressure must not exceed 50 psi.
2. The chamber drain water is not under pressure, and is fed by gravity. Therefore, it must
empty into an open floor drain, condensate pump, or bucket.
Water Recirculation System Installation, Model W100
The optional Model W100 Water Recirculation System provides a source of demineralized water
for the humidity system, using ordinary tap water. Condensate from the chamber is returned back
to the water tank. The water pump runs continuously when the humidity system is enabled,
keeping the supply line pressurized at all times. Detailed assembly pictures are shown on the
next page.
1. Attach filter cartridge. Use clamp provided on each end of filter to prevent leaking. Do not
overtighten.
2. Position the recirculation system on the back left side of the chamber.
3. Attach the chamber Water Supply hose from the chamber to the top fitting of the filter. Use
clamp provided to secure the hose to the Water Supply fitting.
4. Attach the chamber Drain hose to the chamber and position it so it goes into the water tank.
The drain hose must not be submerged in the water.
5. Fill the water tank with clean water.
6. Place the cover on the water tank.
7. Plug the pump power supply into the receptacle labeled Pump on the rear of the chamber.
Water Recirculation System Filter Cartridge Replacement
The demineralizer filter cartridge must be replaced when it is used up. The color of the bottom
half of the cartridge changes gradually brown through continued use. Replacement cartridges are
available from TestEquity (part number TE-0014 for a carton of 6 cartridges).

Chapter 2 – Installation
Page 2-6 TestEquity 1016H-2 Temperature/Humidity Chamber
Water Recirculation System Assembly, Model W100
Finger-tighten the Water Supply and Drain connections to chamber. Plug the pump power supply into
receptacle on the back of the chamber. The drain tube from the chamber must not be submerged in the water.
Use the supplied clamp on each end of filter and the
water inlet fitting to prevent leaking.
Do not over
-tighten the clamp screws.
Bottom of Filter Top of Filter
Clamp
Clamp
Reservoir drain. Drain water
when it appears dirty.
Replace filter when this portion
turns brown.
Clamp
NOTE: The rear panel
of your chamber may
look different.

Chapter 3 – Operation
TestEquity 1016H-2 Temperature/Humidity 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 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 set point.
The F4T/F4 Controller controls the temperature and humidity in the chamber. It can function as
either a single set point controller or as a programmable profile controller. The F4T/F4
Controller automatically turns the refrigeration system on or off based on the demand for
cooling.
Refer to the separate F4T or F4 Temperature/Humidity Controller manual for details on
how to use the 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 set points (or program) on the F4T/F4 Controller.
4. Load your test sample in the chamber.
5. If you are running a controlled humidity condition between +10°C and +85°C, turn the
Humidity button on the F4T controller ON or Event 2 on the F4 controller ON.
6. If you are running temperature-only conditions or are operating lower than +10°C or higher
than +85°C, turn the Humidity button on the F4T controller OFF or Event 2 on the F4
controller OFF. Humidity cannot be controlled in this range of temperature.
7. Turn the CONDITIONING Switch ON. Alternatively, turn the CONDITIONING Switch to
the EVENT 1 position and turn the Power button on the F4T controller ON or EVENT 1 on
the F4 controller ON.

Chapter 3 – Operation
Page 3-2 TestEquity 1016H-2 Temperature/Humidity 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 F4T/F4 Controller, Limit
Controller, and (optional) Chart Recorder are always functional when the Main Disconnect
Switch is ON, regardless of the CONDITIONING 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 Controller or Event 1 (Digital Output 1)
of the F4 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 1016H-2 Temperature/Humidity Chamber Page 3-3
HUMIDITY ENABLE Light
The Humidity mode is enabled through the Humidity button on the F4T Controller or Event 2 on
the F4 Controller. This should only be ON if you are performing a controlled humidity test
within the humidity range of the chamber (+10°C and +85°C). The HUMIDITY ENABLE light
will be illuminated, as long as the chamber temperature is within +7°C and +90°C. The chamber
will cool in single-stage refrigeration mode.
If the Humidity mode is disabled, the chamber will cool in cascade refrigeration mode and there
will be no humidity control.
HUMIDITY Light
The HUMIDITY Light will illuminate when the F4T/F4 Controller turns on the humidifier
heater to maintain the workspace humidity. The HUMIDITY Light will cycle on/off as the
workspace humidity approaches and reaches the humidity set point.
Note that the HUMIDITY ENABLE must be ON, the chamber workspace must be between
+7°C and +90°C, and the humidifier water level must be correct for the HUMIDITY Light to
correspond to the humidity output on the F4T/F4 controller.
There is no corresponding light on the front panel for the dehumidification function.

Chapter 3 – Operation
Page 3-4 TestEquity 1016H-2 Temperature/Humidity Chamber
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 or volatile substances.
!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 1016H-2 (uncontrolled humidity mode only)
Temp +23°C 0°C –40°C –55°C –65°C
Watts 2250 W 1890 W 1100 W 800 W 540 W
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.

Chapter 3 – Operation
TestEquity 1016H-2 Temperature/Humidity Chamber Page 3-5
You may find that the temperature throughout the chamber is even, but always different from
what the F4T/F4 Controller indicates. The correct way to adjust what the F4T/F4 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.
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.
Avoiding Moisture (non-humidity mode)
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.
You CANNOT use the humidity system to control moisture at low temperatures. The humidity
system is disabled below +7°C. However, if you have a source of GN2(gaseous nitrogen) or Dry
Air, you can use the optional Purge system to eliminate moisture condensation at low
temperatures.
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 3 – Operation
Page 3-6 TestEquity 1016H-2 Temperature/Humidity Chamber
Humidity Operation
Humidity Mode Enable
The Humidity mode is enabled through the Humidity button on the F4T Controller or Event 2 on
the F4 Controller. This mode should only be ON if you are performing a controlled humidity test
within the temperature humidity range of the chamber as shown in the chart below.
Standard Humidity Range
This chamber is capable of controlling humidity from 10% RH to 95% RH over the temperature
range of +10°C to +85°C. The lowest possible humidity in the Standard Range varies depending
on the temperature, and is limited to a 6°C dew point. For example, +45°C is the lowest
temperature that 10% RH can be achieved. Below is a chart that shows the achievable range of
humidity as compared to temperature. Achieving low humidity levels require you to start with a
clean, dry chamber. For extended low humidity range below 6°C a dew point condition, see
“Purge Option” which follows.
The F4T/F4 will automatically disable the humidity system below +7°C and above +90°C to
protect the chamber.
Figure 3-2 – Achievable Range of Temperature/Humidity Conditions
Humidity Mode Considerations
The chamber workspace must be between +7°C and +90°C. If the chamber is outside this
temperature range, the chamber will operate as though the Humidity Enable was OFF.
It takes several minutes for the humidifier to fill to the correct level after the water supply is
initially connected to an empty system. The humidifier function is disabled until the water level
is correct.
If you are running a high humidity condition, it can take approximately 5 minutes until the
humidifier heats up from an initial “cold start”. During most of that time, it might appear that
“nothing is happening” because there is little increase in the humidity reading. Be patient – if the
Humidity Light is ON, the humidity will eventually begin to rise after this initial heat-up period.