Keithley 2750 Service Manual

1-20 Performance Verification Model 2750 Multimeter/Switch System Service Manual
Verifying frequency
Follow the steps below to verify the Model 2750 frequency function:
1. Connect the function generator to the Model 2750 INPUT jacks. (See Figure 1-8.)
Be sure the INPUTS switch is in the FRONT position.
2. Set the function generator to output a 1kHz, 1V RMS sine wave.
3. Select the Model 2750 frequency function by pressing the FREQ key.
4. Verify that the Model 2750 frequency reading is between 999.9Hz and 1.0001kHz.
Figure 1-8
Connections for Model 2750 frequency verification
Model 7700 verification
Use these procedures to verify measurement accuracy through the Model 7700 20-
Channel Multiplexer Card.
NOTE Although the following tests are based on the Model 7700 20-Channel Multi-
plexer, the same general procedures can be used for other plug-in modules that
have similar capabilities. Refer to module documentation for specific informa-
tion on terminals and connections for other plug-in modules.
BNC-to-Dual
Banana Plug
Adapter
Function
Output
Function Generator
50Ω
Coax
Cable
3A, 250V
Model 2750
Front Panel
!
F
500V
PEAK
FRONT/REAR
AMPS
HI
INPUT
LO
SENSE
Ω 4 WIRE
INPUT
350V
PEAK
1000V
PEAK
R
CAT I

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