Wavelength Electronics LFI-3751, User Manual

Page: 93 / 132

Chapter 4 - Remote Interface Reference
Confi guring the Sensor
4
•
When writing the [Sensor Bias Confi guration] command, Character
7 (+ or -) confi gures the instrument to manual or automatic mode.
A ‘+’ puts the sensor confi guration under manual control. A ‘-’ lets
the instrument automatically confi gure the sensor. When a ‘-’ is in
Character 7, Characters 6 through 0 are ignored when writing.
Character 6 determines the feedback polarity. A thermistor is a Negative
Temperature Coeffi cient Sensor. All others are Positive Temperature
Coeffi cient Sensors.
You can combine settings to integrate a unique sensor. For example, if
you need 11 mA bias current, you can set Character 4 and Character 2
to ‘1’ to produce an 11 mA bias current.
•
When reading the Sensor Bias Configuration, the Command Type
changes from a WRITE (2) to a READ (1):
Read
!000.00020
(Reads [Sensor Bias Confi guration] )
This helps you determine what sensor confi guration the instrument
is using.
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