Troubleshooting - Fluke 80i-1010 Instruction Sheet

NOTE
When measuring ac current, and using a meter without an
ac mV function, use the ac Volt function.With many meters,
this will limit resolution to 1A and readings will appear
en by 1000. For example, a 15A reading will appear as
0.015V.
5. Select the appropriate ac or de function on the voltmeter.
6. Clamp the jaws of the probe around the conductor to be measured.
Position the probe so that the conductor is in the center of the jaw
opening for the most accurate reading.
NOTE
When measuring current in an ac line cord, the jaws should
be clamped around oy one conductor (the black or hot wire
in a three-wire cord). If the jaws are clamped around both
current carrying conductors, the currents will cancel and
produce a zero reading.
7. Observe the voltmeter display. The reading in millivolts is equivalent
to the current in amps (i.e., 5 mV = 5A). A positive polarity reading
indicates that the dc current is flowing in the direction of the arrow on
the probe (see Figure 3.)
Low Level Measurements
The 80i-1010 is specified to measure currents of 1A or greater. Currents
below 1A can be accurately measured by looping the input wire through
the jaws of the probe so that the sum of the amp-turns through the jaws
is greater than 1A. The actual current can then be calculated by dividing
the meter reading by the number of turns looped through the jaws.(Refer
to the NOTE at the end of the DC ZERO Adjustment procedure.)
TROUBLESHOOTING
If the 80i-1010 does not perform properly, use the following steps to help
isolate the problem:
1. Inspect the jaw mating surface for cleanliness. If any foreign material
is present, the jaws will not close properly and errors will result.
2. Inspect the batteries to make sure they are installed with the proper
polarity. (Refer to the BATTERY INSTALLATION procedure.)
3. Test the batteries. (Refer to the BATTERY TEST procedure.)
4. Verify that the probe leads are connected to the VOLT input of the
meter.
5. Verify that the function selection on the meter is correct, i.e., dc mV
for de current or ac mV for ac current.
CALIBRATION
Requlred Equipment
The equipment required to calibrate the 80i-1010 is listed in Table 2. If
you do not have all the required equipment, send the 80i-1010 to a Fluke
echnical Center for calibration.
Adjustments and Procedures
NOTE
The following procedures are interactive and must be per-
formed in the order given.
1. Set up the 80i-1010 for calibration as follows:
a. Connect the 10-turn butterfly coil to the output of the
Transconductance Amplifier.
b. Connect the DC/AC Voltage Calibrator output to the amplifier
input.
c. Turn both instruments on and allow sufficient warm-up time for
stable operation.
d. Open the jaws of the probe and inspect the mating surfaces for
foreign material. If necessary, clean the plates with a dry cloth.
e. Perform steps 1 through 4 of the BATTERY TEST procedure,