Model TEC1
Thermoelectric Temperature Chamber
For TEC1 s/n 0100222 and above
For TEC1-001 s/n 1100168 and above
Operation and Service Manual
TestEquity LLC
6100 Condor Drive
Moorpark, CA 93021
Support: 877-512-3457 Toll Free
805-480-0636
Corporate: 800-732-3457
805-498-9933
http://www.testequity.com
Copyright © 2010-2018 TestEquity LLC Rev. 2.1 – April 9, 2018
Table of Contents
Chapter 1 – Safety Instructions ................................................................................................ 1-1
Introduction ____________________________________________________________________________ 1-1
Installation Safety Notices _________________________________________________________________ 1-1
Operation Safety Notices __________________________________________________________________ 1-1
Chapter 2 – Installation ............................................................................................................. 2-1
Unpacking ______________________________________________________________________________ 2-1
Preparation For Use _____________________________________________________________________ 2-1
Installation Location _____________________________________________________________________ 2-1
Condensate Drain _______________________________________________________________________ 2-2
Input Voltage Configuration _______________________________________________________________ 2-2
Chapter 3 – Operation ............................................................................................................... 3-1
Introduction ____________________________________________________________________________ 3-1
Summary of Chamber Operation ___________________________________________________________ 3-1
Front Panel Switches _____________________________________________________________________ 3-1
POWER Switch................................................................................................................................................ 3-1
TEMP Switch ................................................................................................................................................... 3-1
Convenience Outlet ______________________________________________________________________ 3-1
Loading the Chamber ____________________________________________________________________ 3-2
Performance Considerations ............................................................................................................................ 3-3
Internal Test Fixtures ....................................................................................................................................... 3-3
Chapter 4 – Temperature Controller ....................................................................................... 4-1
Introduction ____________________________________________________________________________ 4-1
Temperature Controller Keys and Displays __________________________________________________ 4-2
Home Page _____________________________________________________________________________ 4-3
Home Page Parameters .................................................................................................................................... 4-3
Temperature Set Point Control ......................................................................................................................... 4-3
Profile Programming _____________________________________________________________________ 4-4
Operations Page _________________________________________________________________________ 4-5
Setup Page _____________________________________________________________________________ 4-5
Factory Page ____________________________________________________________________________ 4-5
Computer Interface ______________________________________________________________________ 4-6
RS-232C ........................................................................................................................................................... 4-6
GPIB (optional) ................................................................................................................................................ 4-6
Ethernet (optional) ........................................................................................................................................... 4-6
GPIB and Ethernet Programming .................................................................................................................... 4-7
Chapter 5 – Frequently Asked Questions ................................................................................ 5-1
Chapter 6 – Specifications ......................................................................................................... 6-1
Model TEC1 Chamber Specifications _______________________________________________________ 6-1
Table of Contents
Chapter 7 – Maintenance .......................................................................................................... 7-1
Preventive Maintenance Schedule __________________________________________________________ 7-1
Daily or As Needed .......................................................................................................................................... 7-1
Every 6 Months ................................................................................................................................................ 7-1
Every 12 Months .............................................................................................................................................. 7-1
How to clean the chamber interior and exterior ............................................................................................... 7-1
How to verify the chamber performance .......................................................................................................... 7-2
How to verify the calibration ........................................................................................................................... 7-3
Theory of Operation _____________________________________________________________________ 7-4
Thermoelectric Cooling and Heating ............................................................................................................... 7-4
Temperature Control ........................................................................................................................................ 7-4
Troubleshooting _________________________________________________________________________ 7-5
Recommended Spare Parts ________________________________________________________________ 7-6
Major Electrical Parts ____________________________________________________________________ 7-6
General Replaceable Parts ________________________________________________________________ 7-6
EZ-Zone Temperature Controller Setup Parameters __________________________________________ 7-7
EZ-Zone Setup Menu Parameters .................................................................................................................... 7-8
EZ-Zone Custom Menu Parameters ............................................................................................................... 7-10
EZ-Zone Operations Page Parameters ........................................................................................................... 7-10
Chapter 8 – Warranty ............................................................................................................... 8-1
Chapter 9 – Drawings ................................................................................................................ 9-1
Chapter 1 – Safety
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 2 precedes an electric shock hazard CAUTION or WARNING
statement.
Installation Safety Notices
2 WARNING: The power cord is equipped with a grounded/polarized plug. To prevent a
shock hazard, DO NOT defeat the ground or polarization feature. This device
MUST be plugged into a properly grounded and polarized outlet.
! CAUTION: This chamber is designed for operation in a conditioned laboratory
environment. Operation above 27°C (80°F) will have a significant impact on
low-temperature operation.
! CAUTION: For optimum performance, there should be a minimum of 4-inch clearance
between the fans on the back of the chamber and a wall. Operation of the
chamber directly against a wall will result in 25% less cooling capacity.
Operation Safety Notices
! CAUTION: The “EZ-Zone PM 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
PM6R1CC-2AAAAAA, as described on page 112 of the “EZ-Zone PM
User’s Manual” are applicable.
! CAUTION: The EZ-Zone Temperature Controller has been properly configured by
TestEquity to match the chamber’s system requirements and to perform
optimally over a wide range of operating conditions. Improper modifications
to these setup values can result in erratic performance and unreliable
operation. Do not attempt to modify the setup values, unless you thoroughly
understand what you are doing. If there is any doubt, please call TestEquity
before proceeding.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 1-1
Chapter 1 – Safety
Live Load Rating
Temp
+37°C
+23°C
+15°C
+10°C
Watts
90 W
50 W
35 W
20 W
! CAUTION: NEVER select “Factory Default” in the Diagnostic Menu. “Factory Defaults”
are NOT the TestEquity configuration parameters for this chamber. If you
select “Factory Defaults”, you must reconfigure all System and Operation
Parameters as documented in the TestEquity manual, NOT the “EZ-Zone PM
User’s Manual”.
! CAUTION: The EZ-Zone Temperature Controller “Alarm” function is NOT used in the
chamber and is NOT connected.
! WARNING: Do NOT put items in the chamber that 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.
! 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 cooling system fails.
You are responsible for providing thermal protection devices to your test
sample.
! CAUTION: To prevent damage to your test sample and the thermoelectric devices, do not
exceed the live load rating of the chamber.
Page 1-2 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 2 – Installation
Chapter 2 – Installation
Unpacking
Inspect the shipping container for any signs of visible damage. Notify the carrier and TestEquity
immediately if there are signs of shipping damage.
1. Cut the bands that hold the packaging together.
2. Remove the top cover and top foam inserts.
3. Remove the outer box.
4. Carefully lift the chamber out of the box. This should be done by two people, since the unit
weighs 52 pounds.
5. Do NOT handle the chamber by the thermoelectric modules which protrude from the rear.
Preparation For Use
2 WARNING: The power cord is equipped with a grounded/polarized plug. To prevent a
shock hazard, DO NOT defeat the ground or polarization feature. This device
MUST be plugged into a properly grounded and polarized outlet.
1. Inspect the chamber for signs of shipping damage.
2. Read this entire manual.
3. Select a suitable location to place the chamber for use.
4. Plug the power cord to a 115 VAC, 60 Hz power source (or 230 V, 50 Hz if configured for
export use. See “Input Voltage Configuration” on the next page).
5. Perform following the procedure “How to verify the chamber performance” in the
Maintenance chapter of this manual to make sure that no damage has occurred in shipment.
Installation Location
! CAUTION: This chamber is designed for operation in a conditioned laboratory
environment. Operation above 27°C (80°F) ambient room temperature will
have a significant impact on the ability to reach low temperature and is NOT
recommended.
! CAUTION: For optimum performance, there should be a minimum of 4-inch clearance
between the fans on the back of the chamber and a wall. Operation of the
chamber directly against a wall will completely block airflow to the fans,
resulting in 25% less cooling capacity.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 2-1
Chapter 2 – Installation
Condensate Drain
Any time the ambient air is subjected to temperatures below the dew point, moisture will
condense out of the air.
Example 1: If the room temperature is 23°C (74°F) and the humidity is ≥45%RH, moisture will
condense if the chamber is held at 10°C (51°F).
Example 2: If the room temperature is 23°C (74°F) and the room humidity is ≥59%RH,
moisture will condense if the chamber is held at 15°C (58°F).
The condensate drain connection is located on the rear of the chamber. The chamber drain water
is not under pressure and is fed by gravity. Therefore, it must empty into a container. The drain
fitting accommodates a 3/8-inch ID hose.
Under most controlled laboratory or office conditions, there will be no condensation and the
Condensate Drain can be ignored.
Input Voltage Configuration
(Does not apply to model TEC1-001, which is only rated for 115V input)
This chamber can be configured for 115V (88 to 132VAC) or 230 V (176 to 264VAC), 50/60 Hz
input. The chamber ships pre-configured for the correct input voltage based on the county it
ships to. To change the input voltage, use the following procedure:
1. Make sure the chamber is NOT plugged into the power source.
2. Remove the 6 screws on the perimeter of the right side panel.
3. Locate the red voltage selection switch on the DC power supply on the side which normally
faces up.
4. Select either 115 V or 230 V as applicable.
5. Reattach the right side panel, ensuring that no wires are pinched.
6. Plug the chamber into the power source.
7. Turn the POWER switch ON.
8. On the Temperature Controller, enter the Setup Menu\Global Menu. Change the AC Line
Frequency (AC.FL prompt) to either 50 or 60 (Hz) as appropriate. See EZ-Zone Temperature
Controller Setup Parameters in Chapter 7 for instructions on how to navigate to this menu.
Page 2-2 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 3 – Operation
Chapter 3 – Operation
Introduction
The Front Panel Switches control power to the Temperature Controller and all chamber
functions. The Temperature Controller controls the temperature of the chamber. The chamber
automatically heats or cools as required based on the deviation from temperature set point and
according to the PID tuning values.
Summary of Chamber Operation
1. Turn the POWER Switch ON.
2. Enter the desired temperature set point on the Temperature Controller.
3. Load your test sample in the chamber and close the door.
4. Turn the TEMP Switch ON.
5. When you are completed with your test, turn the TEMP Switch OFF to ensure the longest
possible life for the fans, while reducing power consumption and audible noise. You may
also turn the POWER Switch OFF.
Front Panel Switches
POWER Switch
The POWER Switch controls power to the entire chamber.
TEMP Switch
The TEMP Switch enables all chamber functions.
When the POWER Switch is ON and the TEMP Switch is OFF, only the Temperature Controller
is operational.
When both the POWER and TEMP Switches are ON, the chamber fans will turn on and the
temperature conditioning system will function to maintain the temperature set point.
Convenience Outlet
(Applies to model TEC1-001 only)
The rear panel has a convenience outlet. It is provided for the AC power adapter for the GPIB or
Ethernet interface converter only. The power is unswitched and is the same voltage as the outlet
that the chamber is plugged into. Thus, the TEC1-001 is rated for 115 V input only.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 3-1
Chapter 3 – Operation
Live Load Rating
Temp
+37°C
+23°C
+15°C
+10°C
Watts
90 W
50 W
35 W
20 W
Loading the Chamber
! WARNING: Do NOT put items in the chamber that 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.
! 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 cooling system fails.
! CAUTION: To prevent damage to your test sample and the chamber’s thermoelectric
devices, do not exceed the live load rating of the chamber.
Page 3-2 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 3 – Operation
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.
Multiple test samples should be distributed throughout the chamber to ensure even airflow and
minimize temperature gradients. 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 is different from what the temperature controller indicates at a
particular temperature. 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. See page 56 of the “EZ-Zone PM User’s Manual” for details.
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. 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.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 3-3
Chapter 4 – Temperature Controller
Chapter 4 – Temperature Controller
Introduction
The EZ-Zone Temperature Controller can function as either a single set point controller (static
mode) or as a programmable profile controller. The user-interface is organized into five “pages”
of menus.
See the next page for a description of the controller keys and displays, and how to navigate the
menus.
! CAUTION: The EZ-Zone Temperature Controller has been properly configured by
TestEquity to match the chamber’s system requirements and to perform
optimally over a wide range of operating conditions. Improper modifications
to these setup values can result in erratic performance and unreliable
operation. Do not attempt to modify the setup values, unless you thoroughly
understand what you are doing. If there is any doubt, please call TestEquity
before proceeding.
! CAUTION: NEVER select “Factory Default” in the Diagnostic Menu. “Factory Defaults”
are NOT the TestEquity configuration parameters for this chamber. If you
select “Factory Defaults”, you must reconfigure all System and Operation
Parameters as documented in the TestEquity manual, NOT the “EZ-Zone PM
User’s Manual”.
! CAUTION: The EZ-Zone Temperature Controller “Alarm” function is NOT used in the
chamber and is NOT connected.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 4-1
Chapter 4 – Temperature Controller
Temperature Controller Keys and Displays
Temperature Controller Keys and Displays
To navigate through the menus:
• Home Page from anywhere: Press the Infinity Key ˆ for two seconds to return to the home
page.
• Profiling Page from Home Page: Press the Advance Key ‰ for three seconds.
• Operations page from Home Page: Press both the Up ¿ and Down ¯ keys for three
seconds.
• Setup Page from Home Page: Press both the Up ¿ and Down ¯ keys for six seconds.
• Factory Page from Home Page: Press both the Advance ‰ and Infinity ˆ keys for six
seconds.
Page 4-2 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 4 – Temperature Controller
Home Page
Use the Advance Key ‰ to step through the Home Page parameters. The parameter prompt will
appear in the lower display, and the parameter value will appear in the upper display. You can
use the Up ¿ and Down ¯ keys to change the value of read-write parameters, just as you would
in any other menu.
The chamber temperature (read-only) is in the upper display and the temperature Set Point (readwrite) is in the lower display.
If a profile is running, the chamber temperature is in the upper display and the Target Set Point
(read-only) is in the lower display.
Home Page Parameters
The Home Page is a customized list of as many as 20 parameters that can be configured and
changed in the Custom Menu [CUSt] (Factory Page). The home page has been configured by
TestEquity to display only the following parameters:
Prompt Value Description
[AcPu] * Active Process Value Actual chamber temperature (upper display)
[AcSP] * Active Set Point Temperature Set Point (lower display)
[hPr1] Heat Power The percentage of heat throttle.
[CPr1] Cool Power The percentage of heat throttle.
[AUt1] Autotune Autotune (yes or no). While Autotune is active, the Home Page will display
[Attn] [tUn1]. When the Autotune is complete, the message will clear
automatically.
[idS1] Idle Set Point Set a temperature Set Point that can be triggered by an event state, such as
pressing the EZ Key (if configured in the Function Key Menu\Digital Input
Function parameter).
[PSt1] Profile Start Select a profile or step number that will be affected by Profile Action.
[PAC1] Profile Action Request Select the action to apply to the profile (1 to 4) or step selected in Profile
Start.
*Note: [AcPu] and [AcSP] only show up in the Custom Menu configuration Page. They are the parameters that
normally show when the chamber is powered ON.
Temperature Set Point Control
You can change the temperature set point by using the Up ¿ and Down ¯ when a profile is not
running and you are in the Home Page. The new set point is entered within three seconds after a
new value is set.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 4-3
Chapter 4 – Temperature Controller
Profile Programming
The EZ-Zone Temperature Controller can be programmed to store up to 40 total steps into as
many as 4 profiles. You do not need a computer to enter a profile – it can be easily done through
the controller’s front panel keys. A Profile is a set of instructions programmed as a sequence of
steps. The controller handles the profile steps automatically, in sequence.
Refer to Chapter 7 of the “EZ-Zone PM User’s Manual” for detailed instructions on using the
Profile function.
To enter the Profiling Page from Home Page: Press the Advance Key ‰ for three seconds
until [ProF] appears in the lower display.
NOTES:
TestEquity recommends having the End step type to be Hold or User. TestEquity does NOT
recommend using an end step type of Off. This does not turn off the chamber fans and the
temperature will be uncontrolled.
Input events and output events are not included in the controller supplied with the TEC1
chamber. Ignore any mention of them in the “EZ-Zone PM User’s Manual”. Only the capabilities
of a model PM6R1CC-2AAAAAA, as described on page 112 of the “EZ-Zone PM User’s
Manual” are applicable.
Page 4-4 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 4 – Temperature Controller
Operations Page
The Operations Page provides access to menus for control tuning (PID) and controller alarms.
Operations page access from Home Page: Press both the Up ¿ and Down ¯ keys for three
seconds. [``Ai] will appear in the upper display and [oPEr] will appear in the lower display.
! CAUTION: The EZ-Zone Temperature Controller “Alarm” function is NOT used in the
chamber and is NOT connected.
! CAUTION: The EZ-Zone Temperature Controller PID values have been properly
configured by TestEquity to match the chamber’s system requirements and to
perform optimally over a wide range of operating conditions. Improper
modifications to these values can result in erratic performance and unreliable
operation. Do not attempt to modify the PID values, unless you thoroughly
understand what you are doing. If there is any doubt, please call TestEquity
before proceeding. The correct values are documented in the “EZ-Zone
Temperature Controller Setup Parameters” section of this manual.
Setup Page
The Setup Page provides access to menus for configuring the controller hardware.
Setup Page access from Home Page: Press both the Up ¿ and Down ¯ keys for six seconds.
[``Ai] will appear in the upper display and [`Set] will appear in the lower display.
! CAUTION: The EZ-Zone Temperature Controller setup values have been properly
configured by TestEquity to match the chamber’s system requirements and to
perform optimally over a wide range of operating conditions. Improper
modifications to these values can result in erratic performance and unreliable
operation. Do not attempt to modify the setup values, unless you thoroughly
understand what you are doing. If there is any doubt, please call TestEquity
before proceeding. The correct values are documented in the “EZ-Zone
Temperature Controller Setup Parameters” section of this manual.
Factory Page
The Factory Page provides access to menus for controller diagnostics and calibration.
Factory Page access from Home Page: Press both the Advance ‰ and Infinity ˆ keys for six
seconds.
! CAUTION: NEVER select “Factory Default” in the Diagnostic Menu. “Factory Defaults”
are NOT the TestEquity configuration parameters for this chamber. If you
select “Factory Defaults”, you must reconfigure all System and Operation
Parameters as documented in the TestEquity manual, NOT the “EZ-Zone PM
User’s Manual”.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 4-5
Chapter 4 – Temperature Controller
Computer Interface
! CAUTION: Every setting in the EZ-Zone Controller can be accessed via the computer
interface. Improper modifications to configuration settings can result in erratic
performance and unreliable operation. The correct values are documented in
the “EZ-Zone Temperature Controller Setup Parameters” section of this
manual.
RS-232C
The EZ-Zone Temperature Controller has an RS-232C interface. A DB-9 connector is located on
the rear panel. It is wired to accommodate a null-modem cable. To communicate with the
controller from a PC, you need to run software that uses 32-bit Modbus RTU protocol. Each
controller function has a “register” number which can be read or written to (when applicable).
These registers are listed Chapters 6 through 9 of the “EZ-Zone PM Controller Communications
Manual”. RS-232C Modbus programming resources can be downloaded from
http://www.testequity.com/ez .
GPIB (optional)
The optional GPIB interface, model TE-1052, consists of an external converter box (ICS Model
4899A) that connects to the chamber’s RS-232C interface.
Ethernet (optional)
The optional Ethernet interface, model TE-1055, consists of an external converter box (ICS
Model 8099) that connects to the chamber’s RS-232C interface.
Page 4-6 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 4 – Temperature Controller
GPIB and Ethernet Programming
Floating Point Variables
EZ-Zone PM Series controllers use two consecutive register to control a value or to read back a
process variable. The two registers hold an IEEE-754 32-bit floating point word. The registers
are read and written to in the low word-upper word order.
Floating Point Write
The WF command writes the num value in floating point format to two consecutive registers
starting with the low word register.
To enter a temperature setpoint:
WF 2160, 50 'writes 50.0°C to registers 2160 and 2161
WF 2160, 15.5 'writes 15.5°C to registers 2160 and 2161
Floating Point Read
The RF? query reads a 32-bit floating point value from two sequential register in low word-upper
word order. The RF? does not require the number of register to read since it is fixed at two
registers.
To read the actual chamber temperature:
RF? 360 'reads registers 360 and 361
The [?] is an optional symbol for smart programs like ICS’s GPIBKybd program. These
programs can recognize the command as a query and automatically read the response.
Setting Modbus Device Timeouts
The time that the 4899A/8099 waits to receive a response from the Modbus device is
programmable by the D command. This is an internal 4899A/8099 timeout and not the same as
the GPIB bus timeout. If the 4899A/8099 does not receive a response within the timeout period,
it assumes that the Modbus device is not responding and sets the timeout error. Timeout errors
can be determined by reading the 4899A/8099’s Modbus Error Register with the E? query. If the
error code is 101 (Modbus timeout) then the timeout period should be lengthened. The command
to change the timeout period is:
D 300 ‘sets timeout period to 300 ms
*SAV 0 ‘saves current values and configuration (do this if you want to keep
the new value)
The default time period of 100 milliseconds has proved to be satisfactory for most applications.
The recommendation is that your program should have a built-in recovery routine to handle the
possibility of a timeout error.
More details on GPIB and Ethernet Interface
See the ICS Electronics Manual for more details on the GPIB or Ethernet interfaces.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 4-7
Chapter 5 – Frequently Asked Questions
Chapter 5 – Frequently Asked Questions
Why does my chamber heat or cool slower than the published specifications?
Performance 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. Multiple test samples should be
distributed throughout the chamber to ensure even airflow and minimize temperature gradients.
If necessary, an additional shelf should be used to evenly distribute the load. You can determine
if the chamber is operating properly by following the procedure in “How to verify the chamber
performance”.
How can I modify the chamber to cool faster or colder?
Unfortunately, there is nothing you can do to improve upon the designed-in performance. Modifying the chamber will permanently damage the chamber and void the warranty.
Why is there water coming out of the tube in the back of the chamber?
Under what conditions do I need to be concerned about condensation?
Any time the ambient air is subjected to temperatures below the dew point, moisture will
condense out of the air. For example, if the room temperature is 23°C (74°F) and the room
humidity is ≥45%RH, moisture will condense if the chamber is held at 10°C (51°F). If the room
temperature is 23°C (74°F) and the room humidity is ≥59%RH, moisture will condense if the
chamber is held at 15°C (58°F). The condensate drain is provided to remove condensate from the
chamber.
Under most controlled laboratory or office conditions, there will be no condensation.
My test specification requires convection heat only. Can I turn the circulator motors off?
NO! This will damage the thermoelectric devices and void the warranty. You need a “gravity
convection oven” for that kind of test.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 5-1
Chapter 6 – Specifications
Chapter 6 – Specifications
Model TEC1 Chamber Specifications
Temperature Range +10°C to +60°C
Control Tolerance Better than ±0.1°C
(Measured at the control sensor after stabilization)
Uniformity ±1.0°C
(Variations throughout the chamber after stabilization, at least 2-inches from any inside surface)
System Accuracy ±2.0°C
(Indication on temperature controller compared to measurement in the center of the chamber, in the range of +15°C
to +55°C, after 30 minute stabilization at set point)
Cool Down Time
Start Temp to
+55°C ----- 7 min 16 min 26 min Ultimate
+23°C ----- ----- ----- 7 min Ultimate
Heat Up Time
Start Temp to
+23°C ----- 3.5 min 10 min Ultimate
+15°C 2.0 min 5 min 11 min Ultimate
*Note: Heat and cool transition times are measured in an empty chamber after a 30 minute soak at the start
temperature, as indicated on the temperature controller. Transition times do not include the effect of proportional
band when approaching the temperature set point.
Live Load Rating +37°C +23°C +15°C +10°C
90 Watts 50 Watts 35 Watts 20 Watts
Power Requirements
Input Voltage 88 to 132VAC / 176 to 264VAC, 50/60 Hz (internal switch for voltage range)
NOTE: Model TEC1-001 is rated for 115 V nominal input only.
Current Draw 6A at 115 VAC, 3.5A at 230 VAC
Workspace Dimensions 16" W x 8" H x 13" D (0.96 cubic feet)
Outside Dimensions 24.7" W x 12" H x 20.4" D (nominal)
Min. Installed Clearance 4" from the rear
Cable Notch 1" x 3" Cable Notch on left and right side (two total).
Weight 52 pounds
Sound Level Less than 50 dBA
(A-weighted, measured 36" from the front surface in a free-standing environment)
NOTE: Performance is typical and based on operation at 23°C (73°F) ambient and nominal input voltage. This
product is designed for use in a normal conditioned laboratory. Operation at higher ambient temperatures will result
in decreased cooling performance. Operation above 27°C (80°F) will have a significant impact on low-temperature
operation.
+55°C +37°C +23°C +15°C +10°C
+23°C +37°C +55°C +60°C
TestEquity TEC1 Thermoelectric Temperature Chamber Page 6-1
Chapter 7 – Maintenance
Chapter 7 – Maintenance
Preventive Maintenance Schedule
Daily or As Needed
• Clean chamber interior and exterior.
• Listen for abnormal noise or vibration.
Every 6 Months
• Verify the chamber performance.
Every 12 Months
• Verify the calibration.
How to clean the chamber interior and exterior
• Wipe or vacuum out all debris.
• Clean surfaces with a damp cloth, mild detergent, or stainless-steel cleaner. Avoid cleaners
that are abrasive or leave a residue. NEVER use steel wool.
• Clean the exterior painted surfaces with a damp cloth or mild detergent. If you are using a
detergent, test a small inconspicuous area to make sure it does not damage the finish.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 7-1
Chapter 7 – Maintenance
How to verify the chamber performance
These tests verify the performance of the heating, cooling, electrical controls, temperature
controller, and air circulation systems. The chamber should meet all published performance
specifications if all of these tests are successfully passed. These tests assume that the
Temperature Controller’s setup and tuning values have not been changed from the values as
shipped from TestEquity. If the chamber fails any of these tests, it should be removed from
service to prevent further damage until the cause of the problem is determined and resolved.
Use the Up and Down arrow keys to enter the specified temperature in the lower display. Read
the actual chamber temperature on the upper display.
1. The chamber interior should be empty and at ambient temperature, approximately 23°C.
2. Plug the chamber into an AC outlet which matches the input power configuration.
3. Turn the POWER Switch ON and the TEMP Switch OFF.
4. Set the Temperature Controller Set Point to 55.0°C and turn the TEMP Switch ON.
5. The Temperature Controller’s 1 light should be ON continuously and the Controller’s 2 light
should be OFF. The chamber should begin to heat up within approximately 20 seconds.
6. The Temperature Controller should begin controlling (1 light cycles ON/OFF) at
approximately 47°C within approximately 6 minutes.
7. The chamber temperature should slowly increase and stabilize to 55.0°C. It should NOT
overshoot beyond 56.5°C.
8. Let the chamber stay at this condition for 30 minutes.
9. After stabilization, the display should vary no more than ±0.1°C, or a total of 0.2°C.
10. Set the Temperature Controller Set Point to 10.0°C.
11. The Temperature Controller’s 2 light should be ON continuously and the Controller’s 1 light
should be OFF. After about 30 seconds, the chamber should begin to cool down.
12. The chamber should cool down from 55.0°C to 15.0°C within approximately 26 minutes.
13. The chamber should continue to cool down to 10.0°C and begin controlling (2 light cycles
ON/OFF)
14. After stabilization, the display should vary no more than ±0.1°C, or a total of 0.2°C.
15. Set the Temperature Controller Set Point to +23°C. The chamber should begin to heat up.
16. The Temperature Controller’s 1 light should be ON continuously and the Controller’s 2 light
should be OFF.
17. This concludes the chamber performance verification tests.
Page 7-2 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 7 – Maintenance
How to verify the calibration
! CAUTION: TestEquity does not recommend performing the controller calibration
procedures unless you have verified that the controller is actually out of
calibration.
TestEquity recommends verifying the calibration before attempting to actually perform a
calibration. The microprocessor-based instrumentation used in TestEquity chambers seldom goes
out of calibration. If you try to calibrate the instrumentation before determining that calibration is
necessary, you may make it worse if done incorrectly.
Variations in temperature throughout the chamber interior are NOT a measurement of controller
accuracy. These variations, called “gradients”, are a function of the physical design of the
chamber and its airflow, the characteristics of the test sample, and how it is oriented in the
chamber. You cannot “calibrate” to improve gradients. 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. See page 28 and 29 of the “EZZone PM User’s Manual” for details.
Total chamber accuracy, including the effects of controller accuracy, sensor accuracy, and
gradients is ±2.0°C. This is the indication on temperature controller compared to measurement in
the center of the chamber, in the range of +15°C to +55°C, after 30 minute stabilization at set
point. Actual measurements may typically be the following:
Controller Standard Error
55.0°C 53.5°C -1.5°C
37.0°C 36.0°C -1.0°C
23.0°C 23.1°C +0.1°C
15.0°C 15.5°C +0.5°C
These would be considered as being within the specification limit of ±2.0°C.
TestEquity typically enters a Calibration Offset value of -0.5°C to -1.5°C in order to achieve the
results above.
If calibration of the temperature controller is necessary, refer to page 56 of the “EZ-Zone PM
User’s Manual” and follow the instructions for RTD Input.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 7-3
Chapter 7 – Maintenance
Theory of Operation
Thermoelectric Cooling and Heating
Air-to-air exchangers utilize the Peltier effect, whereby the heat is transferred via the flow of
current through thermoelectric modules. One part absorbs the heat and, as a consequence,
reduces the temperature (cold side) and the other part dissipates the heat to ambient (hot side).
Fans are used to move air over heat sinks attached to both the hot and cold sides of the
thermoelectric modules. If the polarity is reversed, the hot and cold sides are also reversed.
There are no moving mechanical parts (except fans) so thermoelectric air-to-air exchangers are
extremely reliable with an almost unlimited life span and require no maintenance (except
possible fan replacement). A thermoelectric air-to-air exchanger does not contain any polluting
substances such as CFC or other gases, has a more compact and simple structure than a
conventional refrigeration system.
Temperature Control
Refer to the electrical schematic to identify the items referenced below. Three thermoelectric
modules (TE1, 2, 3) provide cooling and heating. The air is circulated by a fan which is mounted
to each thermoelectric module. A DC power supply (PS1) provides 12 VDC to power the fans
and thermoelectric modules. A temperature controller (TCR1) measures the air temperature
using at RTD temperature sensor (RTD) and cycles an array of solid state relays on/off as
required to modulate DC power to the thermoelectric modules. The solid state relays are
arranged in an H-bridge configuration to provide switching with polarity reversal for cooling and
heating.
When cooling is required, TCR1 output 2 (cool) turns on. This energizes SSR1 and SSR2. This
applies power to TE1, 2, 3 with (+) on the red wires and (–) on the black wires.
When heating is required, TCR1 output 1 (heat) turns on. This energizes SSR3 and SSR3. This
applies power to TE1, 2, 3 with (–) on the red wires and (+) on the black wires.
Page 7-4 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 7 – Maintenance
SYMPTOM
CONDITION
POSSIBLE CAUSES
Chamber does not
If POWER switch is ON and TEMP
a) DC power supply is configured
d) Shorted fan.
Does not heat up at all.
If controller light 1 is ON, fans are
a) Defective output 1 on
b) Defective SSR3 or SSR4.
Heats up too slow.
If controller light 1 is ON, fans are
a) One Thermoelectric Module is
c) Chamber interior is overloaded.
Does not cool at all.
If temperature controller light 2 is ON,
a) Defective output 2 on
Cools too slowly or does
If temperature controller light 2 is ON,
a) One Thermoelectric Module is
f) Room temperature is over 27°C.
Temperature has
If tuning PID control parameters in
temperature controller were changed.
a) Re-enter values as shipped from
TestEquity.
If tuning PID control parameters in
a) Control parameters may need to
undershoot.
Troubleshooting
function.
not cool down to 10°C.
switch is ON. Controller is lit up. Fans are
not running and doesn’t heat or cool.
running.
running.
fans are running.
fans are running.
for 230 V but chamber plugged
into 115 V.
b) Defective DC power supply.
c) Shorted Thermoelectric Module
Temperature Controller.
open.
b) One of the fans is not running
(defective).
Temperature Controller.
b) Defective SSR1 or SSR2.
open.
b) One of the fans is not running
(defective).
c) Chamber interior is overloaded.
d) Test sample is energized, giving
off excessive heat.
e) Back of chamber is pushed up
against a wall.
excessive overshoot or
undershoot.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 7-5
temperature controller are as shipped from
TestEquity.
be changed for your unique test
conditions.
b) Try to Autotune at the
temperature where you are
observing the overshoot or
Chapter 7 – Maintenance
Description
Mfr
Mfr Part No.
Ref #
Part #
Qty
UOM
AC Input Connector
Tyco Corcom
6ESRM-3
--
222301
1
ea
AC Outlet, NEMA 1-15R
(TEC1-001 only)
Qualtek
738W-CX2/01
--
222303
1
ea
DC Power Supply, 12 VDC, 24A
Mean Well
LRS350-12
PS1
222620
1
ea
Fan (for electrical enclosure)
ebm-Papst
3412N
FM1
222302
1
ea
Fans (for Thermoelectric Assembly)
ebm-Papst
8412NH
TF1-3, EF1-3
383449
6
ea
Power Cord (for USA)
Qualtek
562-312003-01
--
222309
1
ea
Solid State Relay, 30A DC
Crouzet
84 134 870
SSR1-4
222300
4
ea
Switch, SPST, Rocker
Carlingswitch
LRA211-RA-B/125N
SW1, 2
200023
2
ea
Temperature Controller
Watlow
PM6R1CC-2AAAAABR
TCR1
222304
1
ea
Temperature Sensor, RTD
CUSTOM
222306
RTD
222306
1
ea
Thermoelectric Module
CUSTOM
383450
TE1-3
383450
3
ea
Thermoelectric Module Assembly
(Complete with fans)
CUSTOM
383445
TE1-3
TF1-3, EF1-3
383445
1
ea
Description
Mfr
Mfr Part No.
Ref #
Part #
Qty
UOM
Cable Slot Gasket
CUSTOM
CUSTOM
--
382352
2
ea
Door Handle
Southco
P2-51
--
382354
1
ea
Magnetic Catch
Sugatsune
MC-JM50
--
382350
1
ea
Magnetic Catch Striker
Sugatsune
MC-JM49
--
382351
1
ea
Static Dissipative Sheet
(TEC1-001 only)
CUSTOM
382355
--
382355
1
ea
Recommended Spare Parts
Replacement parts are available from TestEquity. Parts are generally in-stock and ready for
immediate shipment. Next-day delivery is always available. If you cannot risk being out of
service for even one day, then you should purchase critical spare parts in advance. The following
is a list of the kinds of parts that you may want to purchase in advance.
Critical Spare Parts Part #
DC Power Supply 222620
Solid State Relay 222300
Switch 200032
Temperature Controller 222304
Thermoelectric Module Assembly 383445
Temperature Sensor, RTD 222306
Major Electrical Parts
General Replaceable Parts
Page 7-6 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 7 – Maintenance
EZ-Zone Temperature Controller Setup Parameters
! CAUTION: The “EZ-Zone PM 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
PM6R1CC-2AAAAAA, as described on page 112 of the “EZ-Zone PM
User’s Manual” are applicable. The “Retransmit” function is available as an
option.
! CAUTION: The EZ-Zone Temperature Controller has been properly configured by
TestEquity to match the chamber’s system requirements and to perform
optimally over a wide range of operating conditions. Improper modifications
to these setup values can result in erratic performance and unreliable
operation. Do not attempt to modify the setup values, unless you thoroughly
understand what you are doing. If there is any doubt, please call TestEquity
before proceeding.
! CAUTION: The EZ-Zone Temperature Controller “Alarm” function is NOT used in the
chamber and is NOT connected.
! CAUTION: NEVER select “Factory Default” in the Diagnostic Menu. “Factory Defaults”
are NOT the TestEquity configuration parameters for this chamber. If you
select “Factory Defaults”, you must reconfigure all System and Operation
Parameters as documented in the TestEquity manual, NOT the “EZ-Zone PM
User’s Manual”.
TestEquity has configured the Temperature Controller with the parameters as documented on the
following pages. These parameters have been saved in User Save Set 1 and User Save Set 2
which is accessible from the Diagnostics Menu.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 7-7
Chapter 7 – Maintenance
EZ-Zone Setup Menu Parameters
Setup Page access from Home Page: Press both the Up ¿ and Down ¯ keys for six seconds.
[``Ai] will appear in the upper display and [`Set] will appear in the lower display.
Setup Menu\Analog Input Menu\Input1
Parameter Prompt Value
Sensor Type SEn r0.1H (RTD 100 Ω)
RTD Leads rt.L 3
Filter Time FiL 0.5
Error Latching i.ER oFF
Decimal dEC 0.0
Setup Menu\Loop Menu
Parameter Prompt Value
Heat Algorithm h.Ag Pid
Cool Algorithm C.Ag Pid
Cool Output Curve C.Cr off
Tru-Tune Enable t.tUn no
Autotune Aggressiveness t.AGr Crit
Peltier Delay P.dL 0.2
User Failure Action UFa oFF
Input Error Failure FAiL oFF
Manual Power MAn 0.0
Open Loop Detect Enable L.dE no
Ramp Action rP oFF
Low Set Point L.SP 9.0 °C
High Set Point h.SP 61.0 °C
Set Point Low Open Loop SP.Lo -100.0 %
Set Point High Open Loop SP.hi 100.0 %
Setup Menu\Output Menu\Output 1
Parameter Prompt Value
Function Fn hEAt
Function Instance Fi 1
Control o.Ct Ftb
Time Base o.tb 0.1
Low Power Scale o.Lo 0.0 %
High Power Scale o.hi 100.0 %
Setup Menu\Output Menu\Output 2
Parameter Prompt Value
Function Fn CooL
Function Instance Fi 1
Control o.Ct Ftb
Time Base o.tb 0.1
Low Power Scale o.Lo 0.0
High Power Scale o.hi 100.0
Page 7-8 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 7 – Maintenance
Setup Menu\Alarm Menu (1 to 4)
Parameter Prompt Value
Type A.ty oFF
Source Sr.A Ai
Hysteresis A.hy 1.0
Logic A.Lg AL.C
Sides A.Sd both
Latching A.LA nLAT
Blocking A.bL oFF
Silencing A.Si oFF
Display A.dSP on
Delay A.dl 0
Setup Menu\Function Key Menu
Parameter Prompt Value
Level LEv high
Digital Input Function Fn nonE
Instance Fi 0
Setup Menu\Global Menu
Parameter Prompt Value
Display Units C_F C
AC Line Frequency AC.FL 60
Ramping Type r.tYP ti
Profile Type P.tyP StPt
Guaranteed Soak Enable gSE on
Guaranteed Soak Deviation gSd1 2.0 °C
Setup Menu\Communications Menu\Communications 1
Parameter Prompt Value
Address Standard Bus Ad.s 1
Temperature Units C_F C
Setup Menu \Communications Menu\Communications 2
Parameter Prompt Value
Address Modbus Ad.M 1
Baud Rate Modbus bAUd 9600
Parity Modbus PAr none
Temperature Units C_F C
Modbus Word Order M.hl Low-High
TestEquity TEC1 Thermoelectric Temperature Chamber Page 7-9
Chapter 7 – Maintenance
EZ-Zone Custom Menu Parameters
Factory Page access from Home Page: Press both the Advance ‰ and Infinity ˆ keys for six
seconds.
Factory Page\Custom Menu
Parameter Prompt Value
Custom 1 AC.Pu Active Process Value
Custom 2 AC.SP Active Set Point
Custom 3 h.Pr Heat Power
Custom 4 C.Pr Cool Power
Custom 5 AUt Autotune
Custom 6 idle Idle Set Point
Custom 7 P.Str Profile Start
Custom 8 P.ACr Profile Action Request
Custom 9 to 20 nonE none
EZ-Zone Operations Page Parameters
Operations page access from Home Page: Press both the Up ¿ and Down ¯ keys for three
seconds. [``Ai] will appear in the upper display and [oPEr] will appear in the lower display.
Operations Page\Analog Input 1
Parameter Prompt Value
Process Value Ain current temperature
Error Status I.Er current status
Calibration Offset i.CA 0.0 °C (offset as required to meet accuracy spec)
Operations Page\Loop Menu
Parameter Prompt Value
Control Mode C.M Auto
Autotune Set Point A.tSP 90.0 %
Autotune Request AUt no
Closed Loop Set Point C.SP 23.0 °C
Idle Set Point id.S 23.0 °C
Heat Proportional Band h.Pb 7.0
Cool Proportional Band C.Pb 4.0
Time Integral ti 180
Time Derivative td 30
Dead Band db 0.0
Open Loop Set Point o.SP 0.0
Page 7-10 TestEquity TEC1 Thermoelectric Temperature Chamber
Chapter 8 – Warranty
Chapter 8 – Warranty
TestEquity LLC Limited Warranty for Model TEC1
TestEquity LLC (TestEquity) warrants the Model TEC1 to be free from defects in materials and workmanship under
normal use and proper maintenance.
TestEquity will repair or replace any defective part for a period of THREE YEARS from the date of invoice.
TestEquity reserves the right to require any defective part be returned, freight prepaid, to TestEquity’s factory or to
inspect any defective part at the Purchaser’s site. TestEquity shall have sole discretion to determine whether any part
is defective and whether any defective part will be repaired or replaced. This limited warranty shall extend to any
standard chamber accessory and component part which is normally sold by TestEquity. Non-standard accessories
and component parts specified by the Purchaser shall be warranted only to the extent of the original manufacturer’s
warranty, if any exists.
If the repair or replacement is performed in the FIRST YEAR from the date of invoice, TestEquity will also pay for
the labor associated with the repair, subject to TestEquity’s prior approval. The chamber must be sent back to
TestEquity for repair, freight prepaid. On-site labor warranty does not apply to Model TEC1.
During the SECOND and THIRD YEAR of the warranty period, Purchaser will be responsible for the installation
and cost of installation of replacement or repaired parts. Purchaser shall notify TestEquity in writing of any alleged
defect within 10 days after its discovery within the warranty period.
This limited warranty does not cover: (1) Defects or damages arising as the result of shipment by common carriers
or private transportation, unless TestEquity undertakes shipment and transportation of the Equipment to Purchaser’s
site or contractually assumes the risk of damage to the Equipment in shipment; (2) Defects or damages arising out
of, or as the result, of mishandling, modification, or improper start up, installation or maintenance of the Equipment
(including start up, installation or maintenance not in accordance with TestEquity’s written procedures); (3) Defects
or damages resulting from, or arising out of, abuse, misuse, neglect, intentional damage, accident, fire, flood,
earthquake, or any other act of God.
This warranty as to Equipment is LIMITED to repair or replacement of parts or Equipment in the determination of
TestEquity LLC THE FORGOING LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES
INCLUDING THE IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND
MERCHANTABILITY. TestEquity LLC DISCLAIMS ANY LIABILITY FOR ANY DAMAGES RESULTING
FROM DELAY OR LOSS OF USE IN SERVICE OR REPAIR, OR FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THE
EQUIPMENT, EXCEPT AS STATED IN THIS PARAGRAPH.
This limited warranty cannot be modified in any way except in writing by both TestEquity and Purchaser.
Invalidation of any one or more of the provisions of this limited warranty shall in no way affect any of the other
provisions hereof, which remain in full force and effect.
This limited warranty shall be extended only to the first Purchaser of this Equipment and is not transferable.
TestEquity TEC1 Thermoelectric Temperature Chamber Page 8-1
Chapter 10 – Drawings
Chapter 9 – Drawing
TestEquity TEC1 Thermoelectric Temperature Chamber Page 9-1
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