Chapter 7 – Maintenance
Page 7-2
TestEquity TEC1 Thermoelectric Temperature Chamber
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.
