Wavelength Electronics LFI-3751, User Manual

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•
The Sensor Error LED fl ashes red and the unit beeps whenever the
sensor error condition occurs. The output is forced OFF.
•
If you correct the error condition then press the Output Button to clear
the error, the instrument will beep three times to indicate that the error
is cleared. Once the error is cleared, press the
Output Button to
re-enable the current.
•
If the error condition has not been corrected, when you press the Output
Button to clear the error, the instrument will sound one long beep. As long
as the error condition has not been corrected, pressing the Output
Button will produce the long beep. If the error condition is corrected,
when you press the Output Button , the unit will beep three times to
indicate the error has been cleared. Press the Output Button again to
turn on the output current.
•
The sensor error condition is triggered by a sensor signal that is either too
high or too low a voltage. The table below indicates where each sensor
will trigger a sensor error.
Chapter 2 - Front Panel Operation
Sensor Error Condition
Sensor Error Condition
SENSOR
Thermistor
RTD
AD590
LM335
LM35
Low Sensor
Error Condition
≤
0.01 V
≤
0.01 V
≤
0.01 V
≤
0.01 V
≤
-4.99 V
High Sensor
Error Condition
≥
4.99 V
≥
4.99 V
≥
4.99 V
≥
4.99 V
≥
4.99 V
ERROR
SENSOR
ON
OUTPUT
ON
OUTPUT
BEEP
3
BEEPS
LONG
BEEP
YES
IS SENSOR
ERROR CONDITION
CORRECTED?
Press Output
Button to
re-enable
output current
YES NO
PRESS
OUTPUT ON
BUTTON
IS SENSOR
ERROR CONDITION
CORRECTED?
NO
PRESS
OUTPUT
BUTTON
Sensor Error Process
Sensor Error LED fl ashes when
sensor is shorted or open. One
long beep sounds if error has not
been corrected after pressing the
Output Button .
2