Keithley 2750 Service Manual

B-18 Calibration Reference Model 2750 Multimeter/Switch System Service Manual
:DATE?
(:CALibration:PROTected:CARD:DATE? <NRf>)
Purpose To request the Model 7700 calibration date.
Format :cal:prot:card:date? <NRf> (<NRf> = 1 to 5)
Response <year>, <month>, <day>
Description The CARD:DATE? query allows you to read back the calibration
date from a Model 7700 in Slot 1 through Slot 5 respectively
(<NRf> = 1 to 5).
NOTE The card calibration date is automatically set to the Model 2750 real time clock
date when the card is calibrated.
Example :CAL:PROT:CARD:DATE? 1 Request card 1 cal date.
:INIT
(:CALibration:PROTected:CARD1:INITiate)
Purpose To initiate Model 7700 calibration procedures.
Format :cal:prot:card1:init
Parameters None
Description The :INIT command enables Model 7700 calibration when perform-
ing these procedures over the bus. This command must be sent to the
unit after sending the :CODE command, but before performing
Model 7700 calibration.
Example :CAL:PROT:CARD1:INIT Initiate 7700 calibration.
:LOCK
(:CALibration:PROTected:CARD1:LOCK)
Purpose To lock out Model 7700 calibration.
Format :cal:prot:card1:lock
Parameters None
Description The :LOCK command allows you to lock out Model 7700 calibration
after completing the procedure. Thus, :LOCK performs the opposite of
enabling calibration with the :CODE command.
Example :CAL:PROT:CARD1:LOCK Lock out card 1 calibration.

Keithley 2750 Specifications

General

Interface	GPIB, RS-232, Ethernet
Switching Speed	Up to 500 channels/second
Maximum Voltage	300V
Operating Temperature	0°C to 50°C
Measurement Functions	DCV, ACV, DCI, ACI, 2-wire Resistance, 4-wire Resistance, Frequency, Temperature
Resolution	6.5 digits
Current	1A
Maximum Current	1A