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5730A
Calibration Manual
56
Verify 100 M
Ω
1. Verification of 100 M
Ω
requires a special cable be built that has banana plugs
on both ends and is 100 % shielded, including over the banana plugs. Use a
twisted pair, shielded cable made with Teflon insulation over the twisted
wires. Build or purchase a metal shroud to go over the banana plugs so when
they are plugged into the standard, Product, or the DMM, the plugs are
covered all the way to the surface. Connect the twisted wires to the two
banana plugs and the shield to the shroud.
2. With this special cable, do steps 2 through 11 and 15 through 17 from the last
section.
3. For steps 7 and 11, while waiting for the reading to settle, hold very still and
have no one moving within 10 feet or so of the test setup. Expect the
readings to take several minutes to settle.
DC Voltage Verification Test
This test checks every dc voltage range, first at 0 V including "negative zero"
points, then at decade voltages from 100 mV to 1000 V as well as a linearity check
on the 22 V range. Use Tables 8 and 9 for the test record. See Table 7 for
equipment used.
Table 7. Required Equipment for DC Voltage Tests
Equipment Model
DC Reference Standard
Fluke 732B
Reference Divider
Fluke 752A
Reference Multimeter
Fluke 8508A
Low Thermal Cables
5730A-7003
Summary of Contents for 5730A
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