Imperx LYNX User Manual page 214

(b) Set TEC mode to constant power.
(c) Set TEC power setting to 8.0W.
(d) Wait for ~30 seconds.
(e) Sample TEC temperature for a comparison reading (comparison-sample).
(f) If (baseline-temp-sample - comparison_temp_sample) ≥ 3 degC then BIST
test passes. Otherwise the BIST test fails, and the TEC cooler is shutdown.
If Self-Test "passes", the TEC unit is released to the user for normal operation, and
a TEC status "Active" is returned. Otherwise, the TEC unit is turned off to protect
the camera and "Shutdown" status is reported. The only way to re-run the TEC
BIST is to re-power the camera.
Active Mode
This is the normal operating mode of the TEC camera. A returned TEC Status
"Active" indicates that the TEC unit is cooling properly.
Shutdown Mode
If the TEC BIST "fails", the TEC cooler is turned off, and TEC Status is reported as
"Shutdown". Shutdown mode indicates that the TEC unit is either not cooling
properly or temperature read back is broken. TEC "Shutdown" status indicates
potential camera hardware problems and customer service should be contacted
immediately.
Protect Mode
A self-protect feature is built into the TEC Controller firmware to reduce excessive
TEC current for an extended period of time. If constant current greater than 2.0A is
detected for ~3.5 minutes, then the TEC unit forced to a safe settings, and TEC
Status "Protect" is reported. All power, temperature, and mode settings are ignored.
The protect mode can only be exited by re-powering the camera.
LYNX Hardware User's Manual
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