ILX Lightwave LDC-3700B Series - Page 120

COMMAND REFERENCE
Command Reference
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CHAPTER 4
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The TEC:MODE:R command selects TEC constant thermistor resistance/linear sensor reference
mode.
Parameters None.
Notes Since sensor resistance (or linear sensor reference) is a function of temperature, this mode also
controls the TEC output load temperature, but it bypasses the use of the conversion constants for
set point calculation. This allows finer control of temperature in cases where the sensor’s
temperature model (and therefore the constants) is not known.
Changing modes causes the output to be forced off, and the new mode’s set point value will be
displayed.
Examples "TEC:MODE:R" −action: sets the TEC controller for constant thermistor resistance/linear sensor
reference operating mode.
"Tec:Mode:R" −action: sets the TEC controller for constant thermistor resistance/linear sensor
reference operating mode.
The TEC:MODE:T command selects TEC constant temperature control mode.
Parameters None.
Notes Since TEC load temperature is derived from sensor resistance/reference, constant R and T modes
are related. In T mode the set point is converted to resistance or reference using the appropriate
constants and conversion model.
Changing modes causes the output to be forced off, and the new mode’s set point value will be
displayed.
Examples "TEC:MODE:T" −action: sets the TEC controller for constant load temperature operating mode.
":tec:mode:T" −action: sets the TEC controller for constant load temperature operating mode.
The TEC:OUTput command turns the TEC output on or off.
Parameters An <nrf value>; 1 = on, 0 = off.
Notes After the output is turned on, it may be useful to wait until the output is stable (within tolerance)
before performing further operations, but it is not necessary.
Examples "TEC:OUTPUT 1" −action: turns the TEC output on.
"Tec:Out 0" −action: turns the TEC output off.
"Tec:Out OFF" −action: turns the TEC output off.
TEC:MODE:R
COMMON
DEVICE DEPENDENT
FRONT PANEL
TEC:MODE:T
COMMON
DEVICE DEPENDENT
FRONT PANEL
TEC:OUTput
COMMON
DEVICE DEPENDENT
FRONT PANEL
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