Fluke 705 - Testing and Calibration Procedures; Recommended Test Equipment; Performance Verification Procedures; DC Current Source Mode Verification

Fluke 705
Calibration Information
6
Recommended Test Equipment
A list of recommended equipment for the
performance verification tests and calibration
adjustment procedure is shown in Table 3.
Performance Verification Procedures
W Warning
To avoid electric shock, do not perform
the verification tests unless the Loop
Calibrator is fully assembled.
Perform the following tests to check the accuracy of
each of the Loop Calibrator’s functions against its
specifications.
If the Loop Calibrator fails any of these tests,
calibration adjustment or repair is required.
DC Current Source Mode
1. Rotate the Loop Calibrator’s function switch
from OFF to the mA / SOURCE / SIMULATE /
MEASURE
position.
The Loop Calibrator should display 4.000 mA. If
it is displaying 0.000 mA, turn the Loop
Calibrator off, press hold U. Turn on the Loop
Calibrator to the
mA position. Continue to hold
U until 4.000 mA is displayed (about three
seconds).
2. Connect the Loop Calibrator’s [
+] terminal to the
HP 3458A I input, and the COM terminal to the
HP 3458 LO input.
Verify that the display shows SOURCE in the
upper-left corner.
3. Set the HP 3458A to measure DC Amps (
DCI).
Refer to Table 4 to verify the readings on the HP
3458A for the following tests. (No adjustment is
necessary for test 1.)
4. Test 2: Press the
Pkey twice to select 12.000
mA. Verify the readings.
5. Test 3: Press the
P key twice to select 20.000
mA/ Press and hold the U key until 24.000 mA
is displayed. Verify the readings.
DC Current Measurement Mode
1. Press the M key twice to get into the
measurement mode.
The Loop Calibrator’s display should read
MEASURE.
2. Disconnect the HP 3458A from the Loop
Calibrator.
3. Connect the test leads from the
AUX terminals of
the Fluke 5500A to the terminals on the Loop
Calibrator (Black to COM and red to [+]).
4. Set the Fluke 5500A to test 4 in Table 4 and
verify the display readings on the Loop
Calibrator.
Repeat for tests 5 and 6.
The reading on the Loop Calibrator’s display
should be within the minimum and maximum
values shown in Table 4.
Table 3. Recommended Equipment
Equipment Minimum Specification Recommended Model or Equivalent
DC Calibrator DC Voltage: 0 to 30 V
Accuracy: ± 0.005 % +50 µV
DC Current 0 to 24 mA Accuracy: ± 0.01% +0.25 µA
Fluke 5500A Multi-Product Calibrator
Digital Multimeter DC Current: 0 to 26 mA
Accuracy: ± 73 ppm
HP 3458A
Flexible Test
Leads
Fluke TL24