C O M M A N D R E F E R E N C E
Command Reference
130
LDC-3700C Series
C H A P T E R
4
The TEC:TOLerance command allows the programmer to determine the TEC
temperature tolerance, and time window for it to occur, in order that the operation
complete flag be set after a "TEC:OUTput 1" command is issued or the set point is
changed.
Parameters
One or two <nrf values>; the first represents the temperature tolerance, in
C, with a
range of 0.1
C to 10.0
C; and the second represents the time window, in seconds, with a
range of 0.001 to 50.0 seconds.
This command may be used in conjunction with the TEC:COND? to test for and delay
further program activities until the TEC temperature reaches its set point to the
specifications of the TEC:TOLerance command.
For example, if the set point is 10
C, tolerance is 0.2
C for 5 seconds, and the TEC
output is turned on, the user may issue the TEC:COND? query and read back the
response to ensure this set point is reached before continuing. In this case, the TEC will
not set bit 9 of the TEC condition register until its TEC load temperature is within 0.2
C of
10
C for a period of 5 seconds.
Notes
The LDC-3700C Series Laser Diode Controller defaults to a tolerance of 0.2
C for 5
seconds, unless changed by the TEC:TOLerance command.
In R mode the temperature and time parameters are both in effect, as in T mode.
In ITE mode, the temperature parameter is not used. A fixed value of 10 mA is used
instead of the temperature parameter, and only the time window may be adjusted.
If the tolerance is set too tight it may never be achieved. This is due to the calibration of
the set point and measurement values.
Examples
"Tol 0.5,10" -action: the LDC-3700C Series Laser Diode Controller's TEC controller will
be in tolerance when the temperature is within 0.5
C for a period of 10.000 seconds.
"TOLer 0.1,1.05" -action: the LDC-3700C Series Laser Diode Controller's TEC controller
will be in tolerance when the temperature is within 0.1
C for a period of 1.050 seconds.
"TEC:MODE:ITE; TOLer ,10" -action: the LDC-3700C Series Laser Diode Controller's
TEC controller is set for ITE mode, and will be in tolerance when the ITE current is within
10 mA for a period of 10.000 seconds.
"Tec:Mode:R; TOLer 0.1,2.5" -action: the LDC-3700C Series Laser Diode Controller's
TEC controller will be in tolerance when the temperature is within 0.1
C for a period of
2.500 seconds.
TEC:TOLerance
C
OMMON
D
EVICE
D
EPENDENT
F
RONT
P
ANEL
Summary of Contents for LDC-3700C Series
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Page 78: ...RE M O T E O PE R A T I ON Command Syntax 62 LDC 3700C Series C H A P T E R 3...
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