ILX Lightwave LDC-3700B Series - Page 121

COMMAND REFERENCE
Command Reference
106 LDC-3700 Series
CHAPTER 4
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The TEC:OUTput? query returns the status of the TEC output switch.
Notes Although the status of the switch is on, the output may not have reached the set point value.
Examples "Tec:Out?" −response: 0, means the TEC output switch is off, TEC output is off.
"TEC:OUT?" −response: 1, means the TEC output switch is on, TEC output is on.
The TEC:R command sets the TEC’s constant thermistor resistance or linear sensor reference set
point.
Parameters An <nrf value> which represents the thermistor resistance set point value, in kΩ; the AD590 current
set point, in µA; or the LM335 voltage set point, in mV, depending on the selected sensor type.
Note The R set point is used to control the TEC output in R mode only. Using the R mode, the user may
also monitor the temperature of the TEC load via a remote algorithm of his/her own design.
Examples "TEC:R 20.5" −action: sets the set point thermistor resistance to 20.5 kΩ, or sets the AD590 current
to 20.5 µA, or sets the LM335 voltage to 20.5 mV.
"TEC:Mode:R; TEC:R 10" −action: sets the set point thermistor resistance to 10.0 kΩ, or the AD590
current to 10.0 µA, or the LM335 voltage to 10.0 mV. The TEC output sensor is controlled to that
value, if the output is on.
The TEC:R? query returns the value of the TEC thermistor resistance, or AD590 current, or LM335
voltage.
Notes TEC load temperature is derived from the thermistor resistance or linear sensor reference
measurement.
This measurement is updated approximately once every 600 msec.
Examples "TEC:R?" −response: 10.543, means the measured TEC thermistor resistance is 10.543 kΩ, or the
measured AD590 current is 10.543 µA, or the measured LM335 voltage is 10.543 mV, depending
on the SENSOR SELECT switch position.
"Tec:R?" −response: 0.728, means the measured TEC thermistor resistance is 728 ohms, or the
measured AD590 current is 0.728 µA, or the measured LM335 voltage is 0.728 mV, depending on
the SENSOR SELECT switch position.
TEC:OUTput?
COMMON
DEVICE DEPENDENT
FRONT PANEL
TEC:R
COMMON
DEVICE DEPENDENT
FRONT PANEL
TEC:R?
COMMON
DEVICE DEPENDENT
FRONT PANEL
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