Fieldpiece HB74 Operator's Manual

Model HB74 HEAVY DUTY
digital multimeter
Multimeter Setup
Selecting Ranges
For DC voltage, set the
meter to the VDC para-
meter instead of VAC as
shown (right).
For all ranges and
functions choose a range
just above the value you
expect. If display reads
"OL" (overload), select a
higher range. If display
shows less than three
numbers, select a lower
range for better resolution.
PHASE ROTATION
The terminals on most
three phase motors are
marked L1, L2, and L3.
The wires supplying
power are not marked
making it impossible to
determine which
direction the motor will
turn. The HB74 solves
this problem.
Connect meter jacks
marked L1, L2, and L3 to
the power wires in any
Make sure all three leads are connected
order.
(L1, L2, and L3 appear "on LCD"). "FOR"
indicates "forward" and means that you can
connect L1 on the meter to L1 on the motor, L2 on
the meter to L2 on the motor, and L3 on the meter
to L3 on the motor and the motor will turn in the
direction designed. If "REV" is displayed, swap
any two leads to correct it and display "FOR".
Display and Controls
DATA HOLD freezes display with the touch of a
button, indicator in LCD turns on. A second touch
resets.
MAX HOLD remembers the largest number
displayed, indicator in LCD turns on. Second
touch resets.
Phase rotation feature identifies phase relation-
ship of three phase power. "L1L2L3" in LCD
identifies which connections have been made.
"FOR" indicates L1, L2, and L3 are connected in
order. "REV" indicates you must switch any two
leads.
Indicator lights and beeper sounds intermittently
when connected to voltages greater than 30V.
Low battery indicator.
Single rotary switch for function and range
selection.
Most accessories use 200mVDC range. For
readings over 200, use the 2000mVDC range.
Use 200mVAC or 2000mVAC range for the AC
current clamp accessory.
For volts, ohms, or measurements using any
accessory, use this jack and COM.
Always plug one test lead in this jack.
For testing current going through the meter (i.e.
NOT using an amp clamp accessory) use one of
these jacks (& COM) and one of these switch
positions.
VOLTS RESISTANCE
Test amps up to
300AAC when
using the Fieldpiece
accessory model
ACH. The model
ACH current clamp
tests amps at a
conversion rate of
1mVAC per 1AAC
(1000 to 1).
Measure AC amps
with a resolution of
0.1A. No need to
mentally move
decimal points.
To connect the ACH current clamp head to
the meter, remove the tips from the ADL2 leads
or use the AHDL1 adapter handle.
Abbreviation used:
Hz Frequency
L1L2L3 Phase rotation
MFD microfarads (capacitance)
Ω
Ohms
Continuity beeper
or diode test
FREQUENCY (Hz)
AMPS W/ CLAMP
Safety Precautions
Never ground yourself when taking electrical
measurements. Do not touch exposed metal pipes,
outlets, etc., which might be at ground potential.
Keep your body isolated from ground with rubber
shoes, rubber mats, or any approved insulating
material.
!
Warning
Under no circumstances exceed these
ratings: 600VAC/600VDC on voltage ranges
(500VDC/350VAC on 200mV range); 500V (AC
or DC) on ohms, diode/continuity, frequency,
and phase rotation range; 200mA/500V on mA
jack; 10A/600V on A jack.
Fully discharge capacitors before testing!
Do not use the ACH 300A clamp head on
uninsulated conductors above 600VAC.
Disconnect the meter from the circuit before
turning any inductor off, including motors,
transformers, and solenoids.
To prevent electrical shock hazard, turn off
the multimeter and disconnect test leads before
removing the back cover.
Do not use during electrical storms.
Symbols Used:
Certified
Risk of electric shock.
Meets the
requirements
!
Caution, refer to manual.
of IEC 1010 CATIII
Ground.
Tested and listed
Double insulation.
by underwriter labs
CAPACITANCE (MFD)
Discharge first
AMPS<200mA*
AMPS to 10A
* Use 200µA switch
position for amps<200µA