Omega HHM17 User manual

OMEGA
HHM17
Digital Multimeter

OMEGAnetSM On-Line Service
http://www.omega.com
Internet e-mail
[email protected]
Servicing North America:
USA: ISO 9001 Certified Canada:
One Omega Drive, Box 4047 976 Bergar
Stamford, CT 06907-0047 Laval (Quebec) H7L5A1
Tel: [phone] Tel: [phone]
FAX: [phone] FAX: [phone]
e-mail: [email protected] e-mail: [email protected]
omega.com
TM
For immediate technical or application assistance:
USA and Canada: Mexico and Latin America:
Sales Service: 1-800-826-6342 / 1-800-TC-OMEGASM Tel: (95) 800-TC-OMEGASM
Customer Service: 1-800-622-2378 / 1-800-622-BESTSM FAX: [phone]
Engineering Service: 1-800-872-9436 / 1-800-USA-WHENSM En Español: [phone]
TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA e-mail: [email protected]
Servicing Europe:
Benelux: Germany/Austria:
Postbus 8034, 1180 LA Amstelveen, Daimlerstrasse 26, D-75392
The Netherlands Deckenpfronn, Germany
Tel: [phone] FAX: [phone] Tel: [phone] FAX: [phone]
Toll Free in Benelux: 06 0993344 Toll Free in Germany: 0800 82 66342
e-mail: [email protected] e-mail: [email protected]
Czech Republic: United Kingdom: ISO 9002 Certified
ul. Rude armady 1868, 733 01 Karvina- One Omega Drive
Hranice, Czech Repubic Riverbend Technology Centre Northbank, Irlam,
Tel: [phone] FAX: [phone] Manchester, M44 5EX, England
e-mail: [email protected] Tel: [phone] FAX: [phone]
France:
9, rue Denis Papin, 78190 Trappes Toll Free in England: 0800-488-488
Tel: [phone] FAX: [phone] e-mail: [email protected]
Toll Free in France: 0800-4-06342
e-mail: [email protected]
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.

1
SAFETY INFORMATION
The following safety information must be observed to insure maximum
personal safety during the operation at 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,
not for measurements of 440 VAC or 600 VAC industrial power mains. The
unit is intended for use with low energy circuits to 600VDC or AC 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.

2
SPECIFICATIONS
Display:3¾digit(4000counts),9999counts(Frequencymode),40segments
analog bar graph and function units sign annunciators.
Polarity: Automatic, positive implied, negative polarity indication.
Overrange: "4000"or"-4000" Most Significant Digit blinks.
Lowbatteryindication: the" "isdisplayedwhen thebatteryvoltagedrops
below the operating level.
Measurementrate:2/sec,nominal.1/sec,CapacitanceandFrequencymode.
20/sec, Analog display.
Operating Environment: 0°C to 40°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.
Auto Power off: 30minutes after rotary switch or mode changes.
Power: single standard 9-volt battery.
Battery life: 200 hours typical.
Dimensions: 192mm (H) x 91mm (W) x 52.5mm (D).
Weight: Approx. 365g 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) on 400mV to 400V ranges
±(0.25%rdg + 3dgts) on 600V range
Input impedance: >10MW
Overload protection: 600VDC or AC rms
AC VOLTS
Ranges: 400mV,4V,40V,400V,600V (400mV only Manual @50Hz-100Hz)
Resolution: 100µV
Accuracy:
Input impedance: >10MW
Overload protection: 600VDC or AC rms
Range 100Hz 1KHz 10KHz 20KHz
400mV
4V
40V
400V
600V ±(0.75%rdg+5dgts)
±(0.75%rdg+5dgts)
N/A
±(1.5%rdg+4dgts)
±(2.0%rdg+30dgts)
N/A

4
DC CURRENT
Ranges: 4mA,40mA,400mA,10A
Accuracy: ±(0.5%rdg + 1dgt) on mA ranges
±(2.0%rdg + 1dgt) on 10A range
Input protection: 0.5A / 250V fast blow ceramic fuse
10A / 600V fast blow ceramic fuse
AC CURRENT (50Hz - 500Hz)
Ranges: 4mA,40mA,400mA,10A
Accuracy: ±(1.0%rdg + 4dgts) on mA ranges
±(3.0%rdg + 4dgts) on 10A range
Input protection: 0.5A / 250V fast blow ceramic fuse
10A / 600V fast blow ceramic fuse
RESISTANCE
Ranges: 400W,4KW,40KW,400KW,4MW,40MW
Accuracy: ±(0.3%rdg + 4dgts) on 400Wrange
±(0.3%rdg + 1dgt) on 4KWto 4MWranges
±(1.0%rdg + 4dgts) on 40MWrange
Open circuit volts: 0.4Vdc
Overload protection: 500VDC or AC rms
CONTINUITY
Audible indication: less than 40W±20W
Overload protection: 500VDC or AC rms

5
DIODE TEST
Test current: 1.0mA±0.6mA
Accuracy: ±(3.0%rdg + 3dgts)
Open circuit volts: 3.0Vdc typical
Overload protection: 500VDC or AC rms
CAPACITANCE
Ranges:4nF,40nF,400nF,4µF,40µF
Accuracy: ±(2.0%rdg+20dgts) on 4n Frange(use 0ADJ)
±(2.0%rdg + 4dgts) on 40nF to 40µF ranges
±(5.0%rdg + 4dgts) above 40µF
Overload protection: 500VDC or AC rms
FREQUENCY (Autoranging)
Ranges: 100Hz,1KHz,10KHz,100KHz,700KHz
Resolution: 0.01Hz
Accuracy: ±(0.05%rdg + 2dgts)
Sensitivity: 1.0V rms min
Overload protection: 500VDC or AC rms
TRANSISTOR hFE
Ranges: 0 - 1000
Base current: 10µAdc approx. (Vce=3.0Vdc)

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.
PON Button
When the meter is automatic power-off, press the button to turns meter back
on.
Note: Disable Automatic Power-off
Ifyoupressandholddownthe(PON)buttonwhileturningthemeterfromOFF
to on and select a function, the automatic power-off feature is disabled.
MEM Button
When (MEM) button is pressed, the "MEM" annunciator is displayed and the
lastreadingisstoredonthemeter.Ifthemeterpowerdownautomaticallyand
thepowerbackonbypressing(PON)button,thesestoredreadingswillremain
in memory.
READ Button
Press(READ)Buttontorecallthedatayoustoredinmemory,thereadingswill
be displayed on the LCD, the "HOLD"annunciator turn on,and the "MEM"
annunciator will be displayed with a blink. The automatic power-off feature is
disabled. Press (HOLD) button to exit the READ mode.

7
RELDD
DD
DButton
Press (REL) button to enter the Relative mode, the "RELD" annunciator turn
on, zero the display, and store the displayed reading as a reference value.
Pressandholddownthe(REL)buttonfor2secondstoexittherelativemode.
MIN / MAX button
Press (MIN / MAX) button to enter the MIN MAX Recording mode. The
minimum, maximum values are then reset to the present input, the readings
are stored in memory, and the "HOLD" annunciator turns on. Push the button
tocyclethroughtheminimum(MIN),maximum(MAX),andpresentreadings.
The MIN or MAX annunciator turns on to indicate what value is being
displayed.
In the MIN MAX Recording mode, press (HOLD) button to stop the recording
of readings, press again to restart recording. If recording is stopped, the
minimum, maximum, or present values and analog diaplay are frozen. In the
MIN MAX Recording mode, when a new minimum value is exceed the actual
minimum readings or a new maximum value is overload, the minimum or
maximumvaluewillheldonthedisplay,buttheanalogdisplaycontinuestobe
active.

8
HOLD Button
Press(HOLD)buttontotoggleinandoutoftheDataHoldmode,exceptifyou
are already in the MIN MAX Recording mode.
In the Data Hold mode, the "HOLD" annunciator is displayed and the last
reading is held on the display, the beeper emits a tone, and the automatic
power-offfeature isdisable.Pressing(MIN/MAX)buttonwhenyouareinthe
Data Hold mode causes you to exit Data Hold and enter the MIN MAX
Recording mode.
In the MIN MAX Recording mode, press (HOLD) button to stop the recording
of readings, press (HOLD) again to resume recording.
RANGE Button
Press (RANGE) button to select the Manual Range mode and turn off the
"AUTO" annunciator. (The meter remains in the range it was in when manual
ranging was selected).
In the Manual Range mode. each time you press (RANGE) button, the range
(and the input range annunciator) increments, and a new value is displayed.
To exit the Manual Range mode and return to autoranging, press and hold
down(RANGE)buttonfor2seconds.The"AUTO"annunciatorturnsbackon.

9
Alternate Function Button
TheAlternateFunctionbuttonisBlueincolor.Pressittotoggletothealternate
function(AC,AudiblecontinuityandCapacitance)showninBlueonthemeter
face.
Voltage Measurements
1. Connect the red test lead to the "VW" jack and the black test lead to the
"COM" jack.
2. Set the Function/Range switch to the desired voltage range and press the
Blue toggle button to select AC or DC. The meter will automatically select
the best voltage range.
3. Connect the test leads to the device or circuit being measured.
4.Fordc,a(-)signisdisplayedfornegativepolarity;positivepolarityisimplied.
Current Measurements
1. Set the Function/Range switch to the desired current range and press the
Blue toggle button to select AC or DC.
2.Forcurrentmeasurementslessthan400mA,connecttheredtestleadtothe
mA jack and the black test lead to the COM jack.
3. For current measurements of 400mA or greater, connect the red test lead
to the 10A jack and the black test lead to the COM jack.
4. Remove power from the circuit under test and open the normal circuit path
wherethemeasurementistobetaken.Connectthemeterinserieswiththe
circuit.
5.Usecautionwhenmeasuring10ampson10Arangefor60s,pleasewaiting
for 10 minutes for next measurement of 10 amps for safety reason.

10
Resistance and Continuity Measurements
1.SettheFunction/Rangeswitchtothedesiredresistancerangeorcontinuity
position.
2. Remove power from the equipment under test.
3. Connect the red test lead to the "VW" jack and the black test lead to the
"COM" jack.
4. Touch the probes to the test points. In ohms, the value indicated in the
display is the measured value of resistance.
5. Press the Blue Alternate Function button to select Audible Continuity.In
continuitytest,thebeepersoundscontinuously,iftheresistanceislessthan
40W.
WARNING
The accuracy of the functions might be slightly affected, when exposed to
a radiated electromagnetic field environment, eg, radio, telephone or
similar.
Diode Tests
1. Connect the red test lead to the "VW" jack and the black test lead to the
"COM" jack.
2. Set the Function/Range switch to the " " position.
3. Turn off power to the circuit under test.
4.Touchprobestothediode.Aforward-voltagedropisabout0.6V(typicalfor
a silicon diode).
5. Reverse probes. If the diode is good, display will be between 2.800V and
3.200V. If the diode is shorted, ".000" or another number is displayed.
6. If the diode is open, display will be between 2.800V and 3.200V, in both
directions.

7.Ifthejunctionismeasuredinacircuitandalowreadingisobtainedwithboth
lead connections, the junction may be shunted by a resistance of less than
1kW. In this case the diode must be disconnected from the circuit for
accurate testing.
Capacitance Measurements
1. Set the Function/Range switch to the desired " "rangeandpress the
Blue toggle button to select Cx.
2. Never apply an external voltage to the Cx sockets. Damage to the meter
may result.
3. Insert the capacitor leads directly into the Cx socket.
4. Read the capacitance directly from the display.
Transistor Gain Measurements
1.SettheFunction/RangeswitchtothedesiredhFErange(PNPorNPNtype
transistor).
2. Never apply an external voltage to the hFE sockets. Damage to the meter
may result.
3. Plug the transistor directly into the hFE socket. The sockets are labeled E,
B and C for emitter, base, and collector.
4. Read the transistor hFE (dc gain) directly from the display.
Frequency Measurements
1. Set the Function/Range switch to the Hz position.
2. Connect the red test lead to the "VW" jack and the black test lead to the
"COM" jack.
3.Connectthetestleadstothepointofmeasurementandreadthefrequency
from the display. 11

MAINTENANCE
WARNING
Remove test leads before changing battery or fuse
or performing any servicing.
Battery Replacement
Powerissuppliedbya9volt"transistor"battery.(NEDA1604,IEC6F22).The
""appearsontheLCDdisplaywhenreplacementisneeded.Toreplacethe
battery, remove the two screws from the back of the meter and lift off the
battery case. Remove the battery from battery contacts.
Fuse Replacement
If no current measurements are possible, check for a blown overload protec-
tion fuse. There are two fuses; F1 for the "mA" jack and F2 for the "10A" jack.
For access to fuses, remove the four screws from the back of the meter and
liftoffthebattery cover and case. Replace F1onlywiththe original type 0.5A/
250V, fast acting ceramic fuse. Replace F2 only with the original type 10A/
600V, fast acting ceramic fuse.
Cleaning
Periodically wipe the case with a damp cloth and detergent, do not use
abrasives or solvents.
12

WARRANTY / DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months
from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one (1) year product
warranty tocoverhandlingandshipping time.Thisensuresthat OMEGA'scustomers receivemaximumcoverage oneach product.If
the unit should malfunction, it must be returned to the factory for evaluation.OMEGA's Customer Service Department will issue an
Authorized Return (AR) number immediately upon phone or written request.Upon examination by OMEGA, if the unit is found to
be defective it will be repaired or replaced at no charge.OMEGA'sWARRANTY does not apply to defects resulting from any action
of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair,
orunauthorizedmodification.ThisWARRANTY isVOIDif the unit showsevidenceofhaving been tampered withor showsevidence
of being damaged as a result of excessive corrosion;or current, heat moisture or vibration; improper specification;misapplication;
misuse or other operating conditions outside of OMEGA's control.Components which wear are not warranted, including but not
limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products.However,OMEGA neither assumes responsibility
for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance
with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it
will be as specified and free of defects.OMEGA MAKES NO OTHERWARRANTIES OR REPRESENTATIONS OF ANY KIND
WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE AND ALL IMPLIED WARRANTIES INCLUDING ANY
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.
LIMITATION OF LIABILITY:The remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with
respect to this order,whether based on contract, warranty,negligence, indemnification, strict liability or otherwise, shall
not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used:(1) as a "Basic Component" under 10
CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any
Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way,
OMEGA assumes no responsibility as set forth in our basicWARRANTY / DISCLAIMER language, and additionally, purchaser will
indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in
such a manner.
RETURN REQUESTS / INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY
PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA'S
CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS).The assigned AR number should then
be marked on the outside of the return package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.
FOR WARRANTY RETURNS, please have the following
information available BEFORE contacting OMEGA:
1. P.O. number under which the product was PURCHASED.
2. Model and serial number of the product under warranty, and
3. Repair instructions and/or specific problems relative to the
product.
FOR NON-WARRANTY REPAIRS, consult OMEGA for
current repair charges.Have the following information
available BEFORE contacting OMEGA:
1. P.O. number to cover the COST of the repair.
2. Model and serial number of product , and
3. Repair instructions and/or specific problems relative to the
product.
OMEGA's policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest
in technology and engineering. OMEGA is a registered trademark of OMEGA ENGINEERING, INC. © Copyright 1999 OMEGA ENGINEERING,
INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or
machine-readable from, in whole or in part, without prior written consent of OMEGA ENGINEERING, INC.

M-2855/0799
Where Do I Find Everything I Need for
Process Measurement and Control?
OMEGA...Of Course!
TEMPERATURE
þThermocouple, RTD & Thermistor
Probes, Connectors, Panels & Assemblies
þWire: Thermocouple, RTD & Thermistor
þCalibrators & Ice Point References
þRecorders, Controllers & Process Monitors
þInfrared Pyrometers
PRESSURE/STRAIN AND FORCE
þTransducers & Strain Gauges
þLoad Cells & Pressure Gauges
þDisplacement Transducers
þInstrumentation & Accessories
FLOW/LEVEL
þRotameters, Gas Mass Flowmeters
& Flow Computers
þAir Velocity Indicators
þTurbine/Paddlewheel Systems
þTotalizers & Batch Controllers
pH/CONDUCTIVITY
þpH Electrodes, Testers & Accessories
þBenchtop/Laboratory Meters
þControllers, Calibrators, Simulators
& Pumps
þIndustrial pH & Conductivity Equipment
DATA ACQUISITION
þData Acquisition &
Engineering Software
þCommunications-Based
Acquisition Systems
þPlug-in Cards for Apple, IBM
& Compatibles
þDatalogging Systems
þRecorders, Printers & Plotters
HEATERS
þHeating Cable
þCartridge & Strip Heaters
þImmersion & Band Heaters
þFlexible Heaters
þLaboratory Heaters
ENVIRONMENTAL
MONITORING AND CONTROL
þMetering & Control Instrumentation
þRefractometers
þPumps & Tubing
þAir, Soil & Water Monitors
þIndustrial Water & Wastewater
Treatment
þpH, Conductivity & Dissolved Oxygen
Instruments