Fluke 5790B, Service Manual

Page: 46 / 172

5790B
Service Manual
3-8
5730A Calibrator
HI
HI
HI
LO
LO
LO
OUTPUT
HI
LO
GND
GRD
752A Voltage Divider Standard
INPUT
REFERENCE
STANDARD
NULL
DETECTOR
732B Voltage
Reference Standard
732B DC STANDARD
AC PWR IN CAL CHARGE LOW BAT
10V 1.018V CHASSIS
GUARD 1.018V COM 10V COM
SERIAL NUMBER
External
Sense
OFF
External
Guard
OFF
8508A Reference Multimeter
NC
hhp301.eps
Figure 3-3. Zero Null Detector Connections
3. Set the reference divider to 0.1 V and the mode switch to OPERATE.
4. Set the 8508A to dc V, 200 mV range, 7 digits, filter IN and "FAST" mode.
Make sure the 8508A is on internal guard (external guard not selected).
5. Wait for the reading to settle and then push the Zero Rng button to zero the
meter.
6. Remove the two shorts from the reference divider and connect the 732B 10 V
Reference Standard and the 5730A as shown in Figure 3-4.