ii Bench Top User’s Manual
Preparation of Operation 35
How to Use the Controlled Specimen Power Terminal and the Time Signal
Output Terminals. 35
Operating the Test Chamber 37
Fault Indicator Light 37
Fault Reset Switch 37
Run Switch 37
Overheat/Overcool (Optional) Protectors 37
Operating the Controller 38
Operating at a Setpoint (Static Mode) 39
Running a Ramp/Soak Profile (Profile Mode) 39
Monitoring the Operation 39
Enabling Humidity Mode (Events) 39
Chapter 7: Checks and Maintenance 41
Check and Maintenance Lists 42
Checks 43
Overheat Protector Trip Test 43
Wet Bulb Wick Check (Not necessary with temperature-only chambers) 43
Maintenance 45
Condenser Cleaning 45
Humidifier Cleaning 45
Test Area Cleaning 48
Take-Down Before Long Periods of Inactivity 48
Chapter 8: Troubleshooting 49
Chamber Faults 50
Alarm Indicator Light 51
Operator Error and Additional Troubleshooting 52
User-level Servicing 54
Resetting Circuit Protector 54
Changing the Chamber Lamp Bulb 55
Defrosting 56
Chapter 9: Appendix 57
Major Specifications 58
BTL North America Specification 58
BTU North America Specification 60
BTZ North America Specification 61
BTZ Export Specification 63
BTX North America Specification 65
BT Detail Specification 67
Consumable Parts and Replacement Interval 71
Glossary 72
Espec Warranty Procedure 75
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