Stanford Research Systems LDC500, Руководство по эксплуатации и обслуживанию

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4 – 36 Remote Operation
Temperature Sensor Status TSNS?
Query the sensor status.
Returns OK 1 or FAULT 0 , based on whether the sensor reading is
within hardware bounds.
There is no front-panel equivalent, although the temperature display
will show dashes, and an error message appears, when a sensor fault
occurs.
TSNS?
Example:
OK
4.5.12 TEC configuration commands
TEC Control Mode TMOD(?)
{ z }
Set (query) the TEC control mode
{
to
z =
(
CC 0
,
CT 1
)
}
.
If the TEC module is on when a
TMOD
command is issued that
changes the operating mode, the controller performs a “bumpless
transfer” to switch control modes on-the-fly. If the TEC was origi-
nally operating in CT mode, and
TMOD
CC is set, the present value of
the TEC current is taken as the CC setpoint. If the TEC is originally
operating in CC mode, and
TMOD
CT
is set, the present value of the
temperature sensor is measured, the CT setpoint is set equal to that
measurement, and the control mode is switched to CT.
Front-panel control is by the [CT
/
CC] button. Note that if the mode
is switched from the front panel while the TEC module is on, a
confirmation message appears on the screen requesting a second
press of the [CT
/
CC] button; after a
∼
3 s timeout, the command
expires if not confirmed.
The remote form of the command TMOD does not impose any delay
or confirmation request; the control mode is changed immediately.
Regardless of the source of the request, changing control mode while
the TEC is on can be inhibited with the
TMLK command.
TMOD CT Example:
LDC500 Series Laser Diode Controllers