Related Manuals for Omega HHM-MA640
Summary of Contents for Omega HHM-MA640
- Page 1 User’ s Guide Shop online at omega.com ® e-mail: info@omega.com or latest product manuals: omegamanual.info MADE IN CHINA HHM-M 640 600 mp C/DC True RMS Clamp Meter...
- Page 2 OMEGAnet Online Service Internet e-mail ® omega.com info@omega.com Servicing North merica: U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047 ISO 9001 Certified Stamford, CT 06907-0047 Toll-Free: 1-800-826-6342 Tel: (203) 359-1660 FAX: (203) 359-7700 e-mail: info@omega.com Canada: 976 Bergar...
- Page 3 Introduction Congratulations on your purchase of this Extech MA640 True RMS Clamp Meter. This meter measures AC/DC Current, AC/DC Voltage, Resistance, Capacitance, Frequency, Diode Test, Duty Cycle and Continuity. Special features include Thermocouple Temperature and Non- Contact Voltage detection. The double molded case is designed for heavy duty use. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
- Page 4 SAFETY NOTES • Do not exceed the maximum allowable input range of any function. • Do not apply voltage to meter when resistance function is selected. • Set the function switch OFF when the meter is not in use. • Remove the battery if meter is to be stored for longer than 60 days.
- Page 5 Description Meter Description Current clamp Clamp opening trigger Hx % Button MODE Button LCD Display Common Input jack NCV sensor NCV LED indicator HOLD/BACKLIGHT Button and FUNCTION switch 10. RANGE Button 11. MAX-MIN Button 12. RELATIVE Button 13. Battery compartment (rear) 14.
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Page 6: Operation
Operation NOTES: Read and understand all Warning and Caution statements in this operation manual prior to using this meter. Set the function select switch to the OFF position when the meter is not in use. Non-Contact Voltage Detector WARNING: Risk of Electrocution. Before use, always test the Voltage Detector on a known live circuit to verify proper operation. - Page 7 AC/DC Voltage Measurements CAUTION: Do not measure voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may occur that can damage the meter. Rotate the function switch to the V position. Press the MODE button to select AC or DC Voltage. Insert the black test lead banana plug into the negative COM jack.
- Page 8 Diode Test Connect as described for resistance measurements Press the MODE button to select diode test Touch the test probe tips to the diode or semiconductor junction under test. Note the meter reading. Reverse the test lead polarity by reversing the red and black leads. Note this reading. The diode or junction can be evaluated as follows: If one reading displays a value (typically 0.400V to 01.800V) and the other reading displays OL, the diode is good.
- Page 9 Frequency and Duty Ratio Measurements Rotate the function switch to the Hz Position. Press the MODE button to select AC Voltage Press the HZ % button to select HZ Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive Hz jack.
- Page 10 Data Hold To freeze the LCD reading, press the HOLD button. While data hold is active, the HOLD icon appears on the LCD. Press the HOLD button again to return to normal operation. MAX/MIN Press the MAX/MIN button to activate the MAX/MIN recording mode. The display icon "MAX"...
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Page 11: Maintenance
Maintenance WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the test leads from the input terminals, and turn OFF the meter before opening the case. Do not operate the meter with an open case. Cleaning and Storage Periodically wipe the case with a damp cloth and mild detergent;... -
Page 12: Specifications
Specifications Accuracy Function Range Resolution (% of reading + digits) AC Current 60.00 AAC 0.01A ±(2.8% + 8 digits) 50/60 Hz 600.0 AAC 0.1A ±(3.0% + 8 digits) True RMS DC Current 60.00 AAC 0.01A ±(2.8% + 5 digits) 600.0 ADC 0.1A ±(3.0% + 5 digits) AC Voltage... - Page 13 General Specifications Clamp jaw opening 1.5" (40mm) approx. Display 6000 count backlit LCD Continuity check Threshold 60Ω; Test current < 0.35mA Diode test Test current of 0.9mA typical; Open circuit voltage [ 2.8VDC typical Low Battery indication Battery symbol is displayed Over-range indication ‘OL’...
- Page 14 W RR NTY/DISCL IMER OMEG ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEG ’s W RR NTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time.
- Page 15 Where Do I Find Everything I Need for Process Measurement and Control? OMEG …Of Course! Shop online at omega.com TEMPER TURE Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies Wire: Thermocouple, RTD & Thermistor Calibrators & Ice Point References Recorders, Controllers &...