Fieldpiece HB74 Heavy Duty Operator's Manual

Model HB74 HEAVY DUTY
digital multimeter

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OPERATORS MANUAL

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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. Abbreviation used:

Hz Frequency
L1L2L3 Phase rotation
MFD microfarads (capacitance)
W Ohms

Continuity beeper
or diode test

 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.

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
Meets the
requirements
of IEC 1010 CATIII

Tested and listed
by underwriter labs

Risk of electric shock.

Caution, refer to manual.

!

Ground.

Double insulation.

Multimeter Setup

Selecting Ranges

For DC voltage, set the
meter to the VDC para­meter 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.

VOLTS

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".

FREQUENCY (Hz)RESISTANCE

AMPS W/ CLAMP

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.

CAPACITANCE (MFD)

Discharge first

AMPS<200mA*

AMPS to 10A

* Use 200µA switch
position for amps<200µA

Functional Specifications

Accuracy specifications good for 75°F±5°F,
relative humidity less than 70%. Accuracy
specified as ±% of reading ± number of least
significant digits. For example if the actual
parameter is 100 and the accuracy is specified
as 1%±3, the measurement could be as high as

101.3 or as low as 98.7 on the 200 scale.

AC voltage (50Hz-500Hz)

Ranges: 200mV, 2000mV, 20V, 200V, 600V
Resolution: 0.1mV on 200mV range
Accuracy: 1.2%±2 @ 50Hz to 500Hz; 2%±5 @

500Hz to 1KHz; 2%±5 @ 50Hz to 500Hz on

600VAC range

Input impedance: 10MW
Conversion type: Average measuring, rms

indicating (sine wave)

DC voltage

Ranges: 200mV, 2000mV, 20V, 600V
Resolution: 0.1mV on 200mV range
Accuracy: 0.5%±1
Input impedance: 10MW

Resistance

Ranges: 200W , 2KW, 20KW , 200KW , 20MW
Resolution: 0.1W on 200W range
Accuracy: 1%±1 on 200W to 200KW ranges,

3%±4 on 20MW range

Open circuit voltage: <0.3V,<3V on 200W range
Test current: <2mA

Capacitance

Range: 20MFD, 200MFD, 2000MFD, 20KMFD

(microfarads).

Accuracy: 4%±10
Tested at: 3V/21Hz

AC current

Ranges: 200µA, 200mA, 10A
Resolution: 0.1µA
Frequency response: 50Hz to 500Hz
Accuracy: 1.5%±3 on 200µA to 200mA ranges;

3.5%±3 on 20A range.

Voltage burden: 250mV on 200µA range;

400mV on 200mA range; 600mV on 10A
range.

DC current

Ranges: 20µA, 200µA, 200mA, 10A
Resolution: 0.01µA
Accuracy: 1.0%±1 on 20µA to 200mA ranges;

2.5%±1 on 10A range

Voltage burden: 250mV on 20µA, 200µA

ranges; 400mV on 200mA range and 600mV
on 10A range.

Frequency

Ranges: 200Hz, 2kHz (10Hz to 2kHz)
Resolution: 0.1Hz
Accuracy: 0.5%±3 on all ranges
Sensitivity: 2V RMS min.
Duty cycle limits: at >30% and <70%
Minimum pulse width: >150µsec
Overload protection: 500VDC or AC rms

Phase rotation indicator

Frequency range: 45Hz to 450Hz
Voltage range: 80VAC to 500VAC
Connection and dislay: Meter displays

"L1L2L3" when all three leads are connected;
"FOR" when they are connected in order.
"REV" means you need to swap any two
leads.

Agency compliance

UL listed. CE certified to IEC1010 cat III 600V.

General Specifications

Heavy duty: Case designed of hi-impact, fire

retardant yellow Valox, fully "O" ring sealed

Display: 3
High Voltage beeper: "lightning bolt" icon in

Data HOLD: "locks" reading range
MAX hold: "MAX" holds the largest reading
Polarity: Auto., pos. (+) implied, neg. (-) indicator
Overrange: (OL) or (-OL) is displayed
Continuity beeper: (<150W) indicated by a

Low battery indicator: The " " is displayed
Overload protection:

(15 seconds in 200mV ranges). MOVS installed
for transient protection up to 6KV/10msec.

(6.35X32mm) fuse (model RFM74) on mA jack,
high energy 12A/600V(1.5X.375") fuse (model
RFL712) on 10A jack.

Operating environment: 0oC-50oC at < 70% R/H
Storage temperature: -20oC-60oC, 0-80% R/H

Temperature coefficient: 0.1 x (specified

Measurement rate: 2.5 times/sec.,nominal.
Auto-power off: Approx. 50 minutes.
Calibration cycle: 1 year.
Battery life: 300 hours typical with carbon-zinc.
Dimensions: 176mm (H) x 73mm (W) x 39mm

Battery type: 9V NEDA 1604 type, IEC 6F22.

1

/2 digit (LCD). Maximum reading of 1999

LCD blinks and beeps intermittently in VAC and
VDC ranges when connected to 30V or greater

continuous "beep" within 100 msec.

Volts: 600VAC/600VDC rms 500VDC/350VDC,

Ohms/diode/continuity/Hz: 500VAC/DC
Phase rotation: 500VAC
Amps, capacitance: fast blow 0.5A/500Vmin

with battery removed from meter.

accuracy)/ oC (< 18oC or > 28oC).

(D). Wt. 340g.

Diode test

Range: 2KW
Accuracy: 1%±1
Resolution: 1mV
Test current: 1.0±0.6mA
Open circuit voltage: 3.2V max

Measures forward voltage drops across

diodes and transistor junctions. Forward: red

test probe to anode. Shunting resistors under

1Kohm must be removed from the circuit.

DIODE FWD REV SHORT OPEN

TYPE OK OK

Silicone 0.6V OL 0.0V OL

Germanium 0.3V OL 0.0V OL"

Fuse Test

If no current and capacitance measurements
are possible, the fuse may be blown.

You can check fuses without opening the case.
For 20A fuse: short VOhms<-->20A jacks, put dial
on continuity/diode check. Beeper sounds and
display shows near zero if 20A fuse is good. It
shows "OL" if fuse is bad.

For mA fuse: short COM<-->mA MFD (test lead
from COM to mA MFD jack), put dial on any MFD
range. If display stays near zero, fuse is bad. If
display starts counting up in a second or two, fuse
is good.

Test Lead Safety

Inspect test leads for damage. Replace if
suspect. Ensure that the test leads are fully
inserted into the proper terminals. Check continuity
by selecting continuity/diode range (first position to
right of OFF). Short VOhms<-->COM jacks. Listen
for continuous beep. If no continuous beep is
present, the leads need to be replaced.

This unit complies with requirements of the fol­lowing European Community Directives: 89/336/
EEC (Electromagnetic Compatibility) and 73/23/
EEC (Low Voltage) as amended by 93/68/EEC (CE
Marking). However, electrical noise or intense
electromagnetic fields in the vicinity of the
equipment may disturb the measurement circuit.
Measuring instruments also respond to unwanted
signals that may be present within the
measurement circuit. Take appropriate
precautions to avoid misleading results when
making measurements in the presence of
electromagnetic interference.

The Fieldpiece HB series was designed in
accordance with IEC Publication 1010-1, Class II,
'Safety Requirements for Electronic Measuring
Apparatus' for use by trained professional
technicians. The instrument complies with class II
and pollution deg. 2 indoor use, overvoltage CAT
III of the IEC 1010-1 (EN61010-1) standard. If the
equipment is used in a manner not specified, the
protection provided by the equipment may be
impaired.

User Maintenance

Repairs or services not covered in this manual
should only be performed by qualified personnel.
Regular operator maintenance consists of
periodic cleaning (case and window), battery
replacement, fuse replacement and recalibration.

When servicing, use only specified

!

replacement parts or equivilant.

Two Year Limited Warranty

This meter is warranted to the original
purchaser against defects in material or
workmanship for a period of two (2) years from
the date of purchase. During the warranty period,
Fieldpiece Instruments will, at its option, replace or
repair the defective unit, subject to verification of
the defect or malfunction.

This warranty does not apply to defects
resulting from abuse, neglect, accident,
unauthorized repair, alteration, or unreasonable
use of the instrument.

Any implied warranties arising out of the sale
of a Fieldpiece Instrument's product, including but
not limited to implied warranties of merchantability
and fitness for a particular purpose, are limited to
the above. The manufacturer shall not be liable for
loss of use of the instrument or other incidental or
consequential damages, expenses, or economic
loss, or for any claim or claims for such damage,
expenses, or economic loss.

State laws vary, so the above limitations or
exclusions may not apply to you. This warranty
gives you specific legal rights, and you may also
have other rights which vary from state to state.

Obtaining Service

Send the meter freight prepaid to Fieldpiece
Instruments. For warranty service also send proof
of date and location of purchase. For out-of­warranty service send $60, check or money order.
Do not send cash. The meter will be repaired or
replaced, at the option of Fieldpiece Instruments.

231 E. Imperial Hwy. Suite 250 Fullerton, CA 92835

[phone] Fax: [phone]

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