Omega HHM32 User manual
OMEGA
HHM32
Digital Multimeter
OMEGAnetSM On-Line Service
http://www.omega.com
Internet e-mail
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omega.com
TM
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It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification
of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts no liability for any errors it contains,
and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient connected application.
SAFETY INFORMATION
The following safety information must be observed to ensure maximum
personal safety during the operation of this meter:
1. Do not use the meter if the meter or test leads look damaged, or if you
suspect that the meter is not operating properly.
2.Thismeterisnotrecommendedforhighvoltageindustrialuse;forexample,
notformeasurementsof440 VACor600VACindustrialpowermains.The
unit is intended for use with low energy circuits to 1000VDC or 750VAC or
high energy circuit to 250 VAC or DC. Accidental misuse by connection
across a high voltage, high energy power source when the meter is set up
for mA measurement may be very hazardous.
3. Turn off power to the circuit under test before cutting, unsoldering, or
breaking the circuit. Small amounts of current can be dangerous.
4.Usecautionwhenworkingabove60Vdcor30Vacrms.Suchvoltagespose
a shock hazard.
5. When Using the probes, keep your fingers behind the finger guards on the
probes.
6.Measuring voltagewhichexceedsthelimitsofthemultimetermaydamage
themeterandexposetheoperatortoashockhazard.Alwaysrecognizethe
meter voltage limits as stated on the front of the meter.
7.Ifthe equipmentisused inamanner notspecifiedby themanufacturer,the
protection provided the equipment may be impaired.
1
2
SPECIFICATIONS
Display:3¾digitliquidcrystaldisplay(LCD)withamaximumreadingof3999.
Polarity: Automatic, positive implied, negative polarity indication.
Overrange: (OL) or (-OL) is displayed.
Zero: Automatic.
Lowbatteryindication: the" "isdisplayedwhenthebatteryvoltagedrops
below the operating level.
Measurement rate: 1.5 times per second, nominal.
Analog bar graph: 41 segments with measurements 12 times per second.
Operating Environment: 0°C to 50°C at < 70% relative humidity.
Storage Temperature: -20°C to 60°C, 0 to 80% R.H. with battery removed
from meter.
Accuracy: Stated accuracy at 23°C ± 5°C, <75% relative humidity.
Safety: According to EN61010-1 protection class II overvoltage category
(CAT II 600V) pollution degree 2.
Power: single standard 9-volt battery, NEDA 1604, JIS 006P, IEC 6F22.
Battery life: 100 hours typical.
Dimensions: 192mm (H) x 91mm (W) x 52.5mm (D).
Weight: 301g including battery.
Accessories: One pair test leads, One spare fuse installed, 9V battery and
Operating Instructions.
3
DC VOLTS
Ranges: 400mV,4V,40V,400V,600V
Resolution: 100µV
Accuracy: ±(0.25%rdg + 1dgt)
Input impedance: 10MW
Overload protection: 500VDC or AC rms on 400mV range
1000VDC or 750VAC rms on all other ranges
AC VOLTS (50Hz - 500Hz)
Ranges: 400mV,4V,40V,400V,600V
Resolution: 100µV
Accuracy: ±(0.75%rdg + 4dgts) on 400mV,40V,400V ranges
±(1.2%rdg + 4dgts) on 600V range
±(1.5%rdg + 4dgts) on 4V range (100Hz to 500Hz)
Input impedance: 10MW
Overload protection: 500VDC or AC rms on 400mV range
1000VDC or 750VAC rms on all other ranges
DC CURRENT
Ranges: 4mA,40mA,4A,10A
Accuracy: ±(0.5%rdg + 1dgt) on 40mA range
±(2.0%rdg + 10dgts) on 4mA , 4A ranges
±(3.0%rdg + 1dgt) on 10A range
Input protection: 100mA / 250V fast blow fuse
10A / 600V fast blow ceramic fuse
4
AC CURRENT (50Hz - 500Hz)
Ranges: 4mA,40mA,4A,10A
Accuracy: ±(1.2%rdg + 4dgts) on 40mA ranges
±(3.0%rdg + 20dgts) on 4mA,4A ranges
±(3.5%rdg + 4dgts) on 10A ranges
Input protection: 100mA / 250V fast blow fuse
10A / 600V fast blow ceramic fuse
RESISTANCE
Ranges: 40W,400W,4KW,40KW,400KW, 4MW,40MW
Accuracy: ±(2.0%rdg + 10dgts) on 40Wrange
±(0.3%rdg + 4dgts) on 400Wrange
±(0.3%rdg + 1dgt) on 4KWto 4MWranges
±(1.0%rdg + 4dgts) on 40MWrange
Open circuit volts: 0.3Vdc (3.0Vdc on 40W,400W)
Overload protection: 500VDC or AC rms
CONTINUITY (400WW
WW
Wrange)
Audible indication: less than 40W±20W
Overload protection: 500VDC or AC rms
DIODE TEST
Ranges: 2V
Test current: 1.0mA ± 0.6mA
Accuracy: ±(3.0%rdg + 3dgts)
Open circuit volts: 3.0Vdc typical
Overload protection: 500VDC or AC rms
5
CAPACITANCE
Ranges:400pF,40nF,4µF,400µF,40mF
Accuracy: ±(2.0% rdg + 5dgts) on 400pF to 4µF ranges
±(5.0% rdg + 10dgts) on 400µF range
±(5.0% rdg + 50dgts) on 40mF range
FREQUENCY (Autoranging)
Ranges: Auto-ranging up to 40MHz
Accuracy: ±(0.05%rdg + 3dgts) on all ranges
Sensitivity: 1.0Vrms min
Overload protection: 500VDC or AC rms
LOGIC TEST
Threshold:Logic Hi : >1.5V, 2.4V, 4.0V
Logic Lo : <0.8V
Frequency response: 20MHz
Detectable pulse width: 25nS
Pulse limits: >30% & <70% duty
Overload protection: 500VDC or AC rms
TRANSISTOR hFE
Ranges: 0 - 1000
Base current: 10µAdc approx. (Vce=3.0Vdc)
TEMPERATURE (Autoranging)
Ranges: -4°F to 2498°F
Resolution: 1°F
Accuracy: ±(2.0%rdg + 6°F) on -4°F to 923°F
±(3.0%rdg + 4°F) on 923°F to 2498°F
6
OPERATION
Before taking any measurements, read the Safety Information Section.
Always examine the instrument for damage, contamination (excessive dirt,
grease, etc.) and defects. Examine the test leads for cracked or frayed
insulation. If any abnormal conditions exist do not attempt to make any
measurements.
Auto-Power-Off function
Once turning on the meter, the auto-power-off function starts to count if the
function does not change within 30 minutes, the auto-power-off condition
will be activated. When power-off happens, the final data is saved. If push
anyone of the push function (except HOLD and AC/DC key) that will turn
on the power again, and LCD segment "APO" will be turn on.
The auto-power-off feature can be disabled manually as a power-on option
by press MAX/MIN button while turning the meter on, and LCD segment
"APO" will be turn off.
Re-Power-On
Once auto-power-off happens, push anyone of the push function (except
HOLD and AC/DC key) or change the rotary mode can re-power-on the
meter. When anyone of the push function is enabled, the storage value will
display with HOLD mold (except logic state), if auto-power-off happened
under MAX/MIN (or PEAK, REL) mode, the PMAX , PMIN or relative and
reference value will be kept. But if re-power-on the meter with rotary mode,
the storage value will be cleared.
LCD Segment Check
Press HOLD button while turning the meter on, and all LCD segment will be
keep turn on until releasing HOLD button.
Hold Feature
PressingtheHOLDkeytoentertheDataHoldmode,the"HOLD"annunciator
is displayed. When HOLD mode is selected, the meter held the present
readings and stops all further measurements.
Pressing the " H " key again to cancel HOLD mode causing meter to resume
taking measurements.
IntheMIN/MAXrecordingmode,pressHOLDkeytostoptherecording.Press
HOLD key again to resume recording. (Previously recorded reading are not
erased).
MAX / MIN Record Feature
PressMIN/MAXkeytoentertheMIN/MAXRecordingmodeandautoranging
featureisdisabled,PushMIN/MAXkeytocyclethroughtheMax/Min/Present
readings. When LCD reads present value the "MAX MIN" annunciator will be
blinking.
To prevent accidental loss of MIN, MAX data, in this mode can only be
cancelled by pressing and hold down the MIN/ MAX key for 1 seconds to exit
and erased recorded readings.
7
8
PEAK ±Hold Feature
Pressing PEAK ±key to enter the PEAK ± hold mode, Push PEAK ±key to
cyclethroughthepeak+/ peak- readings. Topreventaccidental loss of PEAK
±data, In this mode can only be cancelled by pressing and hold down the
PEAK ±key for 1 seconds to exit and erased recorded readings. Under the
PEAK mode, if the pressed time>2 sec, the PEAK function will enter to
calibration mode, the LCD will show "CAL." and the internal buffer will
remember the internal OP offset voltage then back to the manu mode.
Whenever the PEAK function is enabled again, the reading value will minus
the offset voltage, the purpose is to get the real peak reading. Under PEAK
mode, the bargraph always show current value.
RANGE Button
Pressing RANGE key to enter the RANGE mode, the " " annunciator is
displayed. THE ranges of frequency and logic mode is selected by RANGE
key. Pressing and hold down the RANGE key for 1 seconds to exit RANGE
mode.
Inlogicmode1pushcanchangethelogichighreferencevoltagebetween4.0,
2.4 and 1.5V.
"" Button
Press " "buttonto toggle onandoff of backlight.Thebacklight will switch-off
automatically after 60 seconds.
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