© Isothermal Technology
Page 92 of 102
923 milliK manual - issue: 1.10
Example: to lock the calibration of a milliK after adjustment, use:
CAL:LOCK
8.6.26
Command CALibrate:RESistance:GAIN
Format: CALibrate:RESistance:GAIN
<range>,<current>,<gain>,[<standard>]
Sets the resistance measurement
<gain>
for the specified resistance
<range>
and
<current>
with the option to specify the
<standard>
used. Gains outside the range 0.99 to 1.01 are
ignored. The optional
<standard>
parameter is a string that is stored in the calibration
database file (which can be exported to a USB flash drive: see section 5.4) and can be used to
identify the calibration standard used. Typically it would be used to identify the serial number
of the standard. The
<current>
can be specified as either NORMal or ROOT2.
Example: for a milliK that has been found to require a resistance gain of 1.001234 for the
resistance range 0-460
Ω
with normal (1mA) sense current by using a resistance standard with
serial number xyz1956, the gain can be set using:
CAL:RES:GAIN 460,NORM,1.001234,SN_xyz1956
or
CAL:RES:GAIN 460,NORM,1.001234
8.6.27
Command CALibrate:RESistance:GAIN?
Format: CALibrate:RESistance:GAIN?
<range>,<current>
Reports the resistance measurement gain for the specified resistance
<range>
and
<current>.
The
<current>
can be specified as either NORMal or ROOT2. The milliK will
accept gains for the thermistor range (500k
Ω
) with root2 current, but this is not used
(thermistors measurements are always made with a 2µA sense current)
Example: to read the resistance gain for the 115
Ω
range with normal (1mA) sense current
use:
CAL:RES:GAIN? 115,NORM
8.6.28
Command CALibrate:VOLTage:OFFSet<channel#>
Format: CALibrate:VOLTage:OFFSet
<channel#> <offset>
Sets the
<offset>
added to voltage measurements made on
<channel>
. The default units for
the offset are milli-volts. Offsets outside the range ±10µV are ignored.
