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Table of Contents
Summary of Contents for Omega HHM31
- Page 1 OMEGA...
- Page 2 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.
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Page 3: Safety Information
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. -
Page 4: Specifications
SPECIFICATIONS Display: 3½ digit liquid crystal display (LCD) with a maximum reading of 1999. Polarity: Automatic, positive implied, negative polarity indication. Overrange: (OL) or (-OL) is displayed. Zero: Automatic. Low battery indication: the " " is displayed when the battery voltage drops below the operating level. - Page 5 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...
- Page 6 RESISTANCE Ranges: 200W ,2KW ,20KW ,200KW ,2MW ,20MW Accuracy: ±(0.4%rdg + 4dgts) on 200W range ±(0.4%rdg + 1dgt) on 2KW to 2MW ranges. ±(3.0%rdg + 4dgts) on 20MW range Open circuit volts: 0.3Vdc (3.0Vdc on 200W range) Overload protection: 500VDC or AC rms CONTINUITY Audible indication: less than 100W Overload protection: 500VDC or AC rms...
- Page 7 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 of 18°C to 28°C (64°F to 82°F), for 1 year, not including thermocouple error.
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Page 8: Operation
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. - Page 9 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).
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Page 10: Voltage Measurements
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. - Page 11 Resistance and Continuity Measurements 1. Set the Function/Range switch to the desired resistance range or continuity 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"...
- Page 12 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.
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Page 13: Frequency Measurements
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. Connect the test leads to the point of measurement and read the frequency from the display. -
Page 14: Maintenance
MAINTENANCE WARNING Remove test leads before changing battery or fuse or performing any servicing. Battery Replacement Power is supplied by a 9 volt "transistor" battery. (NEDA 1604 IEC 6F22). The " " appears on the LCD display when replacement is needed. To replace the battery, remove the two screws from the back of the meter and lift off the battery case. - Page 15 HHM31 CALIBRATION PROCEDURE Note: Only qualified technicians who have access to the items, as following should perform the following calibration procedure. Equipments: The class of calibrator had better 10 times greater than the measured meter. DCV Calibration Set the function /range to the DC 200mV，then apply 190.0mV to the V-W and COM input jacks.
- Page 16 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...
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Page 17: Data Acquisition
Where Do I Find Everything I Need for Process Measurement and Control? OMEGA...Of Course! TEMPERATURE DATA ACQUISITION PRESSURE/STRAIN AND FORCE HEATERS FLOW/LEVEL ENVIRONMENTAL MONITORING AND CONTROL pH/CONDUCTIVITY M-3194/0799...