Keithley 2750 Service Manual

Model 2750 Multimeter/Switch System Service Manual Calibration Reference B-17
Calibration Reference
:CODE
(:CALibration:PROTected:CODE)
Purpose To program the calibration code or password so that you can perform
the Model 7700 calibration procedures.
Format :cal:prot:code '<char_string>'
Parameters Up to an 8-character string including letters and numbers.
Description The :CODE command enables the Model 2750 calibration procedures
when performing these procedures over the bus. This command must be
sent to the unit before sending any other Model 7700 calibration com-
mand. The default calibration code is KI002750.
NOTE The
:CODE command should be sent only once before performing calibration.
Do not send
:CODE before each calibration step.
The code parameter must be enclosed in single quotes.
Example :CAL:PROT:CODE 'KI002750' Send default code of KI002750.
:COUNt?
(:CALibration:PROTected:CARD:COUNt? <NRf>)
Purpose To determine how many times a Model 7700 has been calibrated.
Format :cal:prot:card:coun? <NRf> (<NRf> = 1 to 5)
Response <n> Calibration count.
Description The :CARD:COUNt? command allows you to determine how many
times a Model 7700 in Slot 1 through Slot 5 (<NRf> = 1 to 5) respec-
tively has been calibrated.
NOTE Use the
:COUNt? command to help you monitor for unauthorized calibration
procedures.
Example :CAL:PROT:CARD:COUN? 1 Request card 1 calibration count.

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