Keithley 2750 Service Manual

Model 2750 Multimeter/Switch System Service Manual Calibration 2-25
Model 7700 Calibration
Remote Model 7700 calibration
1. Connect the Model 7700 to the 7797 Calibration/Extender Board (see “Extender
board connections” above).
2. With the power off, install the Model 7700/7797 combination in Slot 1, and select
the rear inputs with the INPUTS switch. Allow three minutes for thermal equilib-
rium.
3. Accurately measure and record the cold temperature of the Model 7700 card sur-
face at the center of the card.
4. Press in and hold the Model 2750 OPEN key while turning on the power.
5. Enable calibration by sending the :CODE command. For example, the default com-
mand is:
:CAL:PROT:CODE 'KI002750'
6. Initiate calibration by sending the following command:
:CAL:PROT:CARD1:INIT
7. Calibrate the Model 7700 with the following command:
:CAL:PROT:CARD1:STEP0 <temp>
Here <temp> is the cold calibration temperature (°C) measured in Step 3.
8. Send the following commands to save calibration and lock out calibration:
:CAL:PROT:CARD1:SAVE
:CAL:PROT:CARD1:LOCK

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