TestEquity 101H, Руководство по эксплуатации и обслуживанию

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Chapter 9 – Maintenance
TestEquity 101H Temperature/Humidity Chamber Page 75
How to Verify the Performance (Non-controlled humidity mode)
These tests verify the performance of the heating, refrigeration, electrical controls, F4T
Controller, and air circulation systems. The chamber should meet all published performance
specifications if these tests are successfully passed. These tests assume that the F4T Controller’s
setup and tuning values have not been changed from the values as shipped from TestEquity.
Also, the Limit Alarm high limit must be set to over +85°C (+100°C would be fine), and the low
limit set to –25C. 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.
1. The chamber interior should be empty and at ambient temperature, approxi23°C.
2. Plug the chamber into an AC outlet which matches voltage rating on the Model/Serial label.
Turn the POWER Switch ON.
3. Set the Temperature Set Point to +85.0°C. Make sure the Humidity and Purge buttons are
OFF. Press the Power button to turn the chamber ON.
4. The chamber should heat up to about +80°C and begin controlling (orange PWR bar should
show less than 100%) within approximately 12 minutes.
5. The chamber temperature should slowly increase and stabilize to +85°C. It should not
overshoot 85.5°C.
6. Let the chamber stabilize at +85°C for 30 minutes.
7. After stabilization, the chamber air temperature should vary no more than ±0.3°C, or a total
of 0.6°C.
8. After 30 minutes at +85°C, change the Temperature Set Point to –20.0C.
9. The compressor should turn ON and cooling should commence.
10. The chamber should begin controlling (blue PWR bar should show less than 100%) at
approximately –15°C in approximately 47 minutes.
11. Change the Temperature Set Point to –15.0C. After stabilization at –15°C for 30 minutes, the
chamber air temperature should vary no more than ±0.3°C, or a total of 0.6 °C.
12. Set the Temperature Set Point to +23°C. The chamber should begin to heat up. The
compressor should turn off in 2 minutes.
13. Let the chamber heat up to +23°C before turning the Power button OFF.
14.
This concludes the chamber temperature performance verification tests.