Omega HHM31 Manuale utente
OMEGA
HHM31
Digital Multimeter
OMEGAnetSM On-Line Service
http://www.omega.com
Internet e-mail
Servicing North America:
USA: ISO 9001 Certified Canada:
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Stamford, CT 06907-0047 Laval (Quebec) H7L5A1
Tel: (203) 359-1660 Tel: (514) 856-6928
FAX: (203)359-7700 FAX: (514) 856-6886
omega.com
TM
For immediate technical or application assistance:
USA and Canada: Mexico and Latin America:
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Customer Service: 1-800-622-2378 / 1-800-622-BESTSM FAX: (95) 203-359-7807
Engineering Service: 1-800-872-9436 / 1-800-USA-WHENSM En Español: (203) 359-7803
Servicing Europe:
Benelux: Germany/Austria:
Postbus 8034, 1180 LA Amstelveen, Daimlerstrasse 26, D-75392
The Netherlands Deckenpfronn, Germany
Tel: (31) 20 6418405 FAX: (31) 20 6434643 Tel: 49 (07056) 3017 FAX: 49 (07056) 8540
Toll Free in Benelux: 06 0993344 Toll Free in Germany: 0800 82 66342
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: 420 (69) 6311627 FAX: 420 (69) 6311114 Manchester, M44 5EX, England
France:
9, rue Denis Papin, 78190 Trappes Toll Free in England: 0800-488-488
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.
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,
notfor measurementsof440 VACor600VAC industrial powermains. 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 voltage whichexceedsthe limits of themultimeter may damage
themeterandexposetheoperatortoashockhazard.Alwaysrecognizethe
meter voltage limits as stated on the front of the meter.
7.Ifthe equipment is used in a manner not specified bythemanufacturer,the
protection provided the equipment may be impaired.
1
2
SPECIFICATIONS
Display:3½digitliquidcrystaldisplay(LCD)withamaximumreadingof1999.
Polarity: Automatic, positive implied, negative polarity indication.
Overrange: (OL) or (-OL) is displayed.
Zero: Automatic.
Lowbatteryindication: the" "isdisplayedwhenthebatteryvoltagedrops
below the operating level.
Measurement rate: 2.5 times per second, nominal.
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.
Power: single standard 9-volt battery, NEDA 1604, JIS 006P, IEC 6F22.
Battery life: 200 hours typical.
Dimensions: 192mm (H) x 91mm (W) x 52.5mm (D).
Weight: 365g including battery.
Accessories: One pair test leads, One spare fuse installed, 9V battery and
Operating Instructions.
3
DC VOLTS
Ranges: 200mV,2V,20V,200V,600V
Resolution: 100µV
Accuracy: ±(0.35%rdg + 1dgt)
Input impedance: 10MW
Overload protection: 500VDC or AC rms on 200mV range
600VDC or AC rms on all other ranges
AC VOLTS (50Hz - 500Hz)
Ranges: 200mV,2V,20V,200V,600V
Resolution: 100µV
Accuracy: ±(1.0%rdg + 4dgts) on 200mV to 200V ranges
±(2.0%rdg + 4dgts) on 600V range
Input impedance: 10MW
Overload protection: 500VDC or AC rms on 200mV range
600VDC or AC rms on all other ranges
DC CURRENT
Ranges: 200µA,20mA,200mA,10A
Accuracy: ±(0.5%rdg + 1dgt) on µA,mA ranges
±(3.0%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: 200µA,20mA,200mA,10A
Accuracy: ±(1.2%rdg + 4dgts) on µA,mA ranges
±(3.5%rdg + 4dgts) on 10A range
Input protection: 0.5A / 250V fast blow ceramic fuse
10A / 600V fast blow ceramic fuse
4
RESISTANCE
Ranges: 200W,2KW,20KW,200KW,2MW,20MW
Accuracy: ±(0.4%rdg + 4dgts) on 200Wrange
±(0.4%rdg + 1dgt) on 2KWto 2MWranges.
±(3.0%rdg + 4dgts) on 20MWrange
Open circuit volts: 0.3Vdc (3.0Vdc on 200Wrange)
Overload protection: 500VDC or AC rms
CONTINUITY
Audible indication: less than 100W
Overload protection: 500VDC or AC rms
DIODE TEST
Test current: 1.0mA±0.6mA
Accuracy: ±(3.0%rdg + 3dgt)
Open circuit volts: 3.0Vdc typical
Overload protection: 500VDC or AC rms
CAPACITANCE
Ranges:2nF,20nF,200nF,2µF,20µF
Accuracy: ±(2.0%rdg + 10dgts)
Test frequency: 2.5Hz
5
FREQUENCY (Autoranging)
Ranges: 2KHz,20KHz,200KHz,2000KHz,15MHz
Accuracy: ±(0.1%rdg + 1dgt)
Sensitivity: 2.0Vrms min
Overload protection: 500VDC or AC rms
Effect Reading: 10 - 1999
TEMPERATURE ELECTRICAL
Temperature Scale: Celsius or Fahrenheit user-selectable
Measurement Range: -50°C to 1300°C, (-58°F to 2000°F)
Resolution: 1°C or 1°F, 0.1°C or 0.1°F
Accuracy: Accuracy is specified for operating temperatures over the range
of18°Cto28°C(64°Fto82°F),for1 year,notincludingthermocoupleerror.
±(0.3%rdg + 1°C) -50°C to 1000°C
±(0.5%rdg + 1°C) 1000°C to 1300°C
±(0.3%rdg + 2°F) -58°F to 2000°F
Temperature Coefficient: 0.1 times the applicable accuracy specification
per°Cfrom0°Cto18°Cand28°Cto50°C(32°Fto64°Fand82°Fto122°F).
Input Protection: 24V dc or 24V ac rms maximum input voltage on any
combination of input pins.
InputConnector:Acceptsstandardminiaturethermocoupleconnectors(flat
blades spaced 7.9mm, center to center).
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.
Max. Hold and Back-Light ( >2sec) Switch :
Press "MAX" to toggle in and out of the Maximun Hold mode.(holding the
highest reading.) In the MAX mode, the MAX annunciator is displayed and
maximun reading are stored in display register, If the new reading is higher
than the reading being displayed, the higher reading is transferred to the
display register. A "higher" reading is defined as the reading with the higher
absolute value.
The MAX hold function is disable in the frequency count mode, but the MAX
annunciator is still displayed.
Press this button for two seconds to turn the Back-Light on. As this also
activates the MAX hold mode, briefly press the button to return to normal
display. The Back-Light will switch-off automatically after about 20 seconds.
7
T1,T2, T1-T2 Temperature Measurement
WARNING
Remove test leads being measured.
1. Set the Function/Range switch to the T1 thermocouple, T2 thermocouple
or the difference between the two thermocouples (T1-T2), and The LCD
indicates which is selected.
2. Selecting the Temperature Scale:
Readings are displayed in either degrees Celsius(°C) or degrees
Fahrenheit(°F). To change the temperature scale, press the "°C/°F "key.
3. Selecting the Display Resolution
The meter allows two choices of resolution:
High resolution: 0.1°C or 0.1°F
Low resolution: 1.0°C or 1.0°F
To select the alternate display resolution, press the corresponding "0.1°/
1°" key.
4. Connect a type k thermocouple to the jack on the instrument. Place the
probe or thermocouple tip on or in the material to be measured and take
the temperature reading directly from the display.
8
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
"AC/DC" switch to toggle between the desired voltage type. If magnitude
of voltage is not known, set switch to the highest range and reduce until a
satisfactory reading is obtained.
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
"AC/DC" switch toggle between to the desired current type.
2.Forcurrentmeasurementslessthan200mA,connecttheredtestleadtothe
µAmA jack and the black test lead to the COM jack.
3.Forcurrentmeasurementsover200mAorgreater,connecttheredtestlead
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.
Indice
