COMMAND REFERENCE
Command Reference
104 LDC-3700 Series
CHAPTER 4
The TEC:LIMit:THI? query returns the value of the TEC load’s high temperature limit.
−where the response is the temperature limit set point value.
Notes The temperature limit is valid for R and T modes of TEC output operation.
In local operation, the THI limit value is read by pressing the (TEC PARAMETER) SELECT switch
until the LIM T
HI
indicator is lit, and reading the value on the TEC display.
If the high temperature limit is set too low, the TEC output may not be able to be turned on, if the
high temperature condition is also used to turn the TEC output off (see TEC:ENABle:OUTOFF).
Examples "TEC:LIM:Thi?" −response: 30.5, means the TEC load’s high temperature limit is 30.5°C.
"Tec:Limit:THI? −response: 184.7, means the TEC load’s high temperature limit is 184.7°C.
The TEC:MODE? query returns the selected TEC control mode.
Notes The TEC mode is also the parameter which is controlled. The TEC output is kept at the set point.
Examples "Tec:MODE?" −response: ITE, means that constant ITE (current) mode is in effect for the TEC
output.
":TEC:Mode?" −response: R, means that constant R (resistance/reference) mode is in effect for the
TEC output.
"Tec:Mode?" −response: T, means that constant T (temperature) mode is in effect for the TEC
output.
The TEC:MODE:ITE command selects TEC constant TE current mode.
Parameters None.
Notes This mode keeps the TEC current constant, regardless of load temperature variations.
Changing modes causes the output to be forced off, and the new mode’s set point value will be dis−
played.
Examples "TEC:MODE:ITE" −action: sets the TEC controller for constant TEC current operation.
"Tec:Mode:Ite" −action: sets the TEC controller for constant TEC current operation.
TEC:LIMit:THI?
COMMON
DEVICE DEPENDENT
FRONT PANEL
TEC:MODE?
COMMON
DEVICE DEPENDENT
FRONT PANEL
TEC:MODE:ITE
COMMON
DEVICE DEPENDENT
FRONT PANEL
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