Fluke 707Ex
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
XW
Warning
To avoid electric shock, do not perform
the verification tests unless the mA
Calibrator is fully assembled.
Perform the following tests to check the accuracy of
each of the mA Calibrator’s functions against its
specifications.
If the mA Calibrator fails any of these tests,
calibration adjustment or repair is required.
Performance Verification Procedures
DC Current Source Mode
Test 1:
1.
Turn the mA Calibrator on.
2.
After the P.S. power timeout displays, the mA
Calibrator should display 4.000 mA. If it is
displaying 0.000 mA, turn the mA Calibrator off.
Hold down
A
while turning the mA Calibrator
on. Continue to hold
A
for 2 seconds. When the
timeout display ends, the mA Calibrator should
display 4.000 mA.
3.
Connect the mA Calibrator’s
+
terminal to the HP
3458A
I
input, and the
COM
terminal to the HP
3458A
LO
input.
4.
Verify that the mA Calibrator's display shows
SOURCE
in the upper-left corner.
5.
Set the HP 3458A to measure DC Amps (DCI).
6.
Refer to Table 4 to verify the readings on the HP
3458A for the following tests. (No adjustment is
necessary for test 1.)
Test 2:
1.
Press
B
twice to select 12.000 mA.
2.
Verify the readings.
Test 3:
1.
Press
B
twice to select 20.000 mA.
2.
Press and rotate the knob until 24.000 mA is
displayed.
3.
Verify the readings.
DC Current Measurement Mode
Tests 4-6:
1.
Press the
A
key twice to put the mA Calibrator
into the mA measurement mode.
2.
The mA Calibrator’s display should show
MEASURE
in the top right corner.
3.
Disconnect the HP 3458A from the mA
Calibrator.
4.
Connect the test leads from the
red AUX
terminal
of the Fluke 5520A to the HP 3458A
I
input.
5.
Connect a test lead from the
black AUX
terminal
of the Fluke 5520A to the
COM
terminal on the
mA Calibrator.
6.
Connect a test lead from the HP 3458A
LO
input
to the mA Calibrator's
+
terminal.
7.
Adjust the Fluke 5520A to output the value of test
4 in Table 4 as measured by the HP 3458A.
8.
Verify the display readings on the mA Calibrator.
9.
Repeat adjustment and reading for steps 5 and 6.
Table 3. Recommended Equipment
Equipment
Recommended Model or Equivalent
DC Calibrator
DC Voltage: 0 to 30 V
Accuracy:
±
0.004 % +0.5 mV
DC Current: 0 to 24 mA
Accuracy:
±
0.004% +0.5
μ
A
Fluke 5520A Multi-Product Calibrator
Digital Multimeter
DC Current: 0 to 26 mA
Accuracy:
±
0.004% +0.5
μ
A
HP 3458A
Flexible Test Leads
Fluke TL24
