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42
System Operation
Sensor Select changed
Sensor Shorted
Mode Change
To clear these conditions and to turn OFF the ERROR LED, all the error
conditions must be addressed, and the output must be turned ON. See the
Commands Section for additional information.
4.3.8
TEC LIMIT Indicator LED
A soft limit occurs when the output current exceeds a preset limit value,
clamping the current flow at that level and causing the LIMIT LED to blink.
The LIMIT LED stops blinking and is turned OFF automatically when the
output current does not exceed the current limit.
ERROR LED
ON
OFF
OFF
4.3.9
TEC Status LEDs
The HEAT and COOL STATUS LEDs indicate if the Temperature Controller
Subsystem is attempting to raise or lower the temperature of the attached
TEC.
4.3.10
TEC DISPLAY Section
The lower-right quadrant of the Model 6100 front panel has a 5 digit green
LED array. The table below shows the displayed value and the state of units
LEDs based on the TEC mode of operation.
LIMIT LED CONDITION
ON
BLINKING
OFF
Table 3
TEC Error and Limit LED Status Definition
((Interlock asserted) OR (Internal
temperature exceeds 80
Short) OR (Sensor Open) OR
(Compliance voltage exceeds 10.3V) OR
(Temperature outside T_High and
T_Low limit settings) OR (Resistance
outside R_High and R_Low limit
settings))
((Output current exceeds current limit)
OR (Compliance voltage exceeds voltage
limit))
No error condition detected
o
C) OR (Sensor
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