Keysight DAQ970A Service Manual

2 Calibration Procedures
48 Keysight DAQ970A/DAQ973A Service Guide
Calibrator setup
Connect the input cable shields to earth ground by connecting the calibrator's
output LO terminal to earth GROUND at the calibrator. It is important that the LO
to earth ground connection can be made at only one place in the circuit to avoid
ground loops as shown in following image:
– Allow at least a 60-minute warm-up period for Fluke calibrator to stabilize.
– Perform DC zero calibration (it takes approximately 2.5 minutes to complete)
from the front panel at least once every 30 days to ensure its performance
accuracy.
NOTE
The V-GUARD terminal is connected to the GROUND terminal via the shorting
bar, and the output LO terminal is connected to the GROUND terminal with a
wire (Lug on the LO terminal, alligator clip to the shorting bar). This is mandatory
for low current measurements.
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Keysight DAQ970A Specifications

General

Scan Rate	Up to 450 channels/sec
Connectivity	USB, LAN, GPIB (optional)
Display	4.3-inch color LCD
Operating Temperature	0 °C to 50 °C
Number of slots	3 slots
Measurement Types	DCV, ACV, DCI, ACI, 2-wire resistance, 4-wire resistance, frequency, temperature, capacitance
Voltmeter	6.5 digit
Resolution	22 bits
Memory	Non-volatile memory