OMEGA HHM14 Digital Multimeter
omega.com TM OMEGAnetSM On-Line Service http://www.omega.com USA: ISO 9001 Certified One Omega Drive, Box 4047 Stamford, CT 06907-0047 Tel: (203) 359-1660 FAX: (203)359-7700 e-mail: info@omega.com Internet e-mail info@omega.com Servicing North America: Canada: 976 Bergar Laval (Quebec) H7L5A1 Tel: (514) 856-6928 FAX: (514) 856-6886 e-mail: info@omega.
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. This meter is not recommended for high voltage industrial use; for example, not for measurements of 440 VAC or 600 VAC industrial power mains.
SPECIFICATIONS Display: 4½ digit liquid crystal display (LCD) with a maximum reading of 19999. Polarity: Automatic, positive implied, negative polarity indication. Overrange: (1) or (-1) is displayed. Zero: Automatic. Low battery indication: the " " is displayed when the battery voltage drops below the operating level. Measurement rate: 2 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.
DC VOLTS Ranges: 200mV,2V,20V,200V,1000V Resolution: 10µV Accuracy: ±(0.05%rdg + 4dgts) Input impedance: 10MW Overload protection: 1000VDC or 750VAC rms AC VOLTS (True RMS) Ranges: 200mV,2V,20V,200V,750V Resolution: 10µV Accuracy: Range Input 200mV 20mV-200mV 2V 200mV-2V 20V 2V-20V 200V 20V-200V 750V 200V-750V 45Hz-1KHz 1KHz-20KHz ±(1.0%rdg+10dgts) ±(1.5%rdg+10dgts) ±(1.5%rdg+10dgts) N/A Input impedance: 10MW Overload protection: 500VDC or 350VAC (30 sec.
DC CURRENT Ranges: 200µA,2mA,20mA,200mA,10A Accuracy: ±(0.5%rdg + 10dgts) on 200µA to 200mA ranges ±(2.0%rdg + 10dgts) on 10A range Input protection: 0.5A / 250V fast blow fuse 10A / 600V fast blow ceramic fuse AC CURRENT (True RMS 50Hz - 500Hz) Ranges: 200µA,2mA,20mA,200mA,10A Accuracy: ±(1.0%rdg + 10dgts) on 200µA to 200mA ranges ±(2.5%rdg + 10dgts) on 10A range Input protection: 0.
CONTINUITY Audible indication: less than 40W ±20W Overload protection: 500VDC or AC rms DIODE TEST Test current: 1.0mA ± 0.6mA Accuracy: ±(2.0%rdg + 3dgts) Open circuit volts: 3.3Vdc typical Overload protection: 500VDC or AC rms TRANSISTOR hFE Ranges: 0 - 1000 Base current: 10µAdc approx. (Vce=3.
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. 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 type (AC or DC) and range.
5. Use caution when measuring 10 amps on 10A range for 60s, please waiting for 10 minutes for next measurement of 10 amps for safety reason. 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" jack. 4. Touch the probes to the test points.
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. Touch probes to the diode. A forward-voltage drop is about 0.6V (typical for a silicon diode). 5. Reverse probes. If the diode is good, "1" is displayed. If the diode is shorted, ".000" or another number is displayed. 6. If the diode is open, "1" is displayed in both directions. 7.
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. Remove the battery from battery contacts. Fuse Replacement If no current measurements are possible, check for a blown overload protection fuse.
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 to cover handling and shipping time. This ensures that OMEGA's customers receive maximum coverage on each product.If the unit should malfunction, it must be returned to the factory for evaluation.
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