4 – 32
Remote Operation
TEC Voltage Limit
TVLM(?)
{
f
}
Set (query) the TEC voltage limit
{
to
f
}
, in V.
The TEC current source has an intrinsic compliance voltage of
±
8.5 V.
If the user needs to assure that the TEC voltage cannot reach that
hardware limit, then
TVLM
,
together with
the
TTVL
command, can
configure the TEC to turn o
ff
when the voltage exceeds the
TVLM
value.
Note that there is no separate voltage clamping of the TEC driver—
setting
TVLM
, while leaving
TTVL
NO
, has no operational e
ff
ect on
the LDC500.
Front panel:
"#
I)
.
TVLM?
Example:
8.00
Lower Temperature Limit
TMIN(?)
{
f
}
Set (query) the lower temperature limit
{
to
f
}
, in
◦
C.
The LDC500 provides both lower and upper user-defined tempera-
ture limits for normal operation. If the user must assure the device is
not operated below some minimum temperature (for instance, near
the condensation point), setting
TMIN
together with
ATMN
and
/
or
TTMN
will provide an automatic shut-o
ff
if this minimum tempera-
ture is exceeded.
Note that the temperature limits are not e
ff
ective if the sensor model
is set to “none” (resistance units).
Front panel:
!"#
!!!!0)$
.
TMIN 7.5
Example:
Upper Temperature Limit
TMAX(?)
{
f
}
Set (query) the upper temperature limit
{
to
f
}
, in
◦
C.
The LDC500 provides both lower and upper user-defined tempera-
ture limits for normal operation. If the user must assure the device
is not operated above some maximum temperature, setting
TMAX
together with
ATMX
and
/
or
TTMX
will provide an automatic shut-o
ff
if this maximum temperature is exceeded.
LDC500 Series Laser Diode Controllers
