E N G L I S H
37
1. Press the ON-OFF pushbutton to
turn on this Meter.
2. Clamp around an input or output
phase (as required), and run motor
at desired speed. Be sure the
clamp jaws are securely closed, or
measurements will not be accurate.
3. Observe the display for true-rms
current flow.
4. Measure an output phase of the
motor controller and use Hz mode
to measure frequency. Nominal
motor speed is calculated from RPM
= 120F/P, where F is the frequency
measured, and P is the number of
motor poles.
5. To record readings and to view
readings, press the MIN-MAX
pushbutton.
6. To clear RECORD, press the MIN-
MAX pushbutton for 2 seconds.
7. MAINTENANCE AND
CALIBRATION
7.1 Maintenance
Repairs or servicing should only be
performed by qualified personnel.
WARNING: TO AVOID ELECTRIC SHOCK, DO
NOT PERFORM ANY SERVICING PROCEDURE
UNLESS YOU ARE QUALIFIED TO DO SO.
READ “CLAMP-ON METER SAFETY” AT
THE BEGINNING OF THIS MANUAL BEFORE
PROCEEDING.
To assure continued safety of this
Meter, inspect this Meter before
use for cracks or missing portions
of the insulating cover, or for loose
or weakened components. Pay
particular attention to the insulation
surrounding the clamp jaws and
clamp lever. Any Meter that fails
this inspection should be made
inoperative by taping the clamp shut.
Periodically wipe the case with a
damp cloth and detergent; do not
use abrasives or solvents. Open the
clamp jaws and wipe the magnetic
pole pieces with a lightly oiled cloth.
Do not allow rust or corrosion to form
on the pole pieces.
The serial number is stamped on the
back of the unit.
The serial number should be used
when ordering parts or requesting
service/calibration information.
7.2 Parts
WHEN SERVICING THIS METER, USE
ONLY THE SPECIFIED REPLACEMENT
PARTS.
Replaceable parts are bellow.
UD71TLAC TEST LEAD & ALLIGATOR
CLIP SET.
7.3 Calibration
This Meter should be calibrated
annually. Regarding the service/
calibration information on this Meter,
contact the nearest distributor of this
Meter.
8. GENERAL
SPECIFICATIONS
8.1 Technical Data
Digital Display: 4000 counts (3 3/4
digits) [Hz: 9999 counts], updates 4
times/sec.
Analog: Updates 20 times/sec, 41
segment bar graph.
Maximum Conductor Size:
ø 51mm (2.00”).
