Keithley 2750, Service Manual

Page: 159 / 179

Model 2750 Multimeter/Switch System Service Manual Calibration Reference B-19
Calibr
ation R
efer
ence
:LOCK?
(:CALibration:PROTected:CARD1:LOCK?)
Purpose
To read Model 7700 calibration lock status.
Format
:cal:prot:card1:lock?
Response
0 Calibration locked.
1 Calibration unlocked.
Description
The
:LOCK?
query requests status from the Model 2750 on Model
7700 calibration locked/unlocked state. Calibration must be enabled
sending the
:CODE
command before calibration can be performed.
Example
:CAL:PROT:CARD1:LOCK?
Request card 1 cal lock state.
:RCOunt
(:CALibration:PROTected:CARD1:RCOunt)
Purpose
To reset card calibration count to 0.
Format
:cal:prot:card1:rco
Parameters
None
Description
The
:RCOunt
command resets the card calibration count reported by
:COUNt?
to 0.
Example
:CAL:PROT:CARD1:RCO
Rest card calibration count.
:REFTEMP?
(:CALibration:PROTected:CARD:REFTEMP? <NRf>)
Purpose
To request the Model 7700 reference calibration temperature.
Format
:cal:prot:card:reftemp? <NRf>
(<NRf> = 1 to 5)
Response
<ground_voltage>,<ref_temp>
Description
The
CARD:REFTEMP?
query allows you to read back the ground volt-
age and calibration reference temperature from a Model 7700 in Slot 1
through Slot 5 respectively (<NRf> = 1 to 5). The two response values
are delimited by a comma.
Example
:CAL:PROT:CARD:REFTEMP? 1
Request card 1 temp.