Keithley 2700 Service Manual

1-20 Performance Verification
Verifying AC voltage
Check AC voltage accuracy by applying accurate AC voltages at specific frequencies from
the AC voltage calibrator to the Model 7700 inputs and verifying that the displayed readings
fall within specified ranges.
CAUTION Do not exceed 300V RMS between plug-in module INPUT H and L termi-
nals or between adjacent channels, or 8 × 10
7
V•Hz input, because instru-
ment damage may occur.
Follow these steps to verify AC voltage accuracy:
1. Connect the Model 7700 CH1 H and L INPUT terminals to the AC voltage calibrator as
shown in Figure 1-9.
Figure 1-9
Connections for Model 7700 AC volts verification
HLHL
AMPS
HLHLHLHLHLHL
LO
CH21 CH22 CH11 CH12 CH13 CH14 CH15 CH16
HLHLHLHL
CH17 CH18 CH19 CH20
SENSE
(OHMS, 4 WIRE)
INPUT
(V, 2 WIRE)
HLHLHLHL
CH7 CH8 CH9 CH10
HLHL
HLHL
HLHL
HLHL
INPUT SENSE
CH1 CH2
CH3
CH4
CH5
CH6
CH1
Output HI
Output
LO
Calibrator (Output AC Voltage)
Model 7700
Amplifier (Connect to calibrator)
Shielded
Cable

Keithley 2700 Specifications

General

Type	Digital Multimeter
Measurement Functions	DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Frequency, Temperature
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Frequency Range	3 Hz to 500 kHz
Temperature Range	-200°C to +1372°C
Display	Vacuum Fluorescent Display
Connectivity	IEEE-488, RS-232
Channels	10
Power Supply	100V to 240V AC, 45Hz to 66Hz
DC Current Range	10 µA to 3 A
AC Current Range	10 µA to 3 A
Temperature Measurement	Thermocouple, RTD