Error Indicators; Analog Output - ILX Lightwave LDT-5500B Series User Manual

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C H A P T E R
Conditions Which Will Automatically Disable the OUTPUT
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Error Indicators

The ERROR indicators become lit when the corresponding conditions occur. The
SENSOR OPEN light comes on whenever the sensor connections are open. The
TE OPEN indicator becomes lit whenever an open circuit (or a high impedance
condition) occurs on the TE module output when the output is on. When a TE
OPEN condition occurs, the output will be shut off and the indicator will remain on
until the problem is resolved and the output is turned on again.
The T LIMIT light remains lit whenever the temperature limit is reached. The I
LIMIT light will remain lit whenever the I TE current limit is reached.
If a shorting condition occurs or a load which has < 1 of resistance is used, the
output will be disabled and both the I LIMIT LED and TE OPEN LED will remain lit.
This error can only occur on the LDT-5545B due to the minimum load resisance
specification.

Analog Output

An analog output signal is available at the ANALOG OUTPUT connector (BNC)
on the front panel. This signal is a voltage between 0 - 5.0 volts which is
proportional to the measurement. For example, an analog output signal of 2.5
volts (+0.5 volts) would represent a measurement of 50% of full scale.
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 LDT-5500B Series
O P E R A T I O N
Introduction to the LDT-5500B Series Front Panel
Temperature Limit
Sensor Open (While Output On)
TEC Module Open (While Output On)
SENSOR SELECT Switch Moved (While Output On)
Operating Mode Changed (While Output On)
Short condition or low resistance (LDT-5545B only)