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Summary of Contents for CEM DT-912
- Page 1 OPERATING INSTRUTION DIGITAL MULTIMETER HOLD 2000 2000 2000 200k 1.5V BATT. 2000 CAT III 600V...
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Page 3: Safety Instructions
SAFETY INSTRUCTIONS This meter has been designed for safe use, but must be operated with caution. The rules listed below must be carefully followed for safe operation. NEVER apply voltage or current to the meter that exceeds the specified maximum: Input Limits Function Maximum Input... -
Page 4: Safety Symbols
and disconnect the power when making resistance or diode tests. ALWAYS turn off the power and disconnect the test leads before opening the doors to replace the fuse or batteries. NEVER operate the meter unless the back cover and the battery and fuse doors are in place and fastened securely. -
Page 5: Controls And Jacks
connected to a circuit point at which the voltage with respect to earth ground exceeds (in this case) 500 VAC or VDC. This symbol adjacent to one or more terminals identifies them as being associated with ranges that may, in normal use, be subjected to particularly hazardous voltages. -
Page 6: Symbols And Annunciators
LCD Display Function switch 10A jack COM jack Positive jack Data Hold Button Backlight Button Note: Tilt stand, fuse and battery compartment are on rear of unit. SYMBOLS AND ANNUNCIATORS •))) Continuity Diode test micro (amps) µ milli ( volts, amps) kilo (ohms) ohms Ω... -
Page 7: Specifications
SPECIFICATIONS Function Range Resolution Accuracy DC Voltage 200mV 0.1mV ±(0.5% reading + 2 (V DC) digits) 2000mV 1mV 0.01V 200V 0.1V ±(0.8% reading + 2 digits) 600V AC Voltage 200V 0.1V ±(1.2% reading + 10 (V AC) digits 600V (50/60Hz) DC Current 2000µA 1µA ±(1.0% reading + 2... - Page 8 • (+ digits) – This is the accuracy of the analog to digital converter. NOTE: Accuracy is stated at 65 F to 83 F (18 C to 28 C) and less than 75% RH. SPECIFICATIONS Diode Test Test current of 1mA maximum, open circuit voltage 2.8V DC typical Continuity Check...
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Page 9: Battery Installation
Fuses mA, µA ranges; 0.2A/250V fast blow A range; 10A/250V fast blow Operating Temperature 32 F to 122 F (0 C to 50 Storage Temperature F to 140 F (-20 C to 60 Relative Humidity <70% operating, <80% storage Operating Altitude 7000ft. -
Page 10: Data Hold Button
WARNING: To avoid electric shock, do not operate the meter until the battery door is in place and fastened securely. NOTE: If your meter does not work properly, check the fuses and batteries to make sure that they are still good and that they are properly inserted. -
Page 11: Dc Voltage Measurements
1. ALWAYS turn the function switch to the OFF position when the meter is not in use. 2.If “OL” appears in the display during a measurement, the value exceeds the range you have selected. Change to a higher range. NOTE: On some low AC and DC voltage ranges, with the test leads not connected to a device, the display may show a random, changing reading. -
Page 12: Ac Voltage Measurements
a higher resolution reading. The display will indicate the proper decimal point and value. If the polarity is reversed, the display will show (-) minus before the value. AC VOLTAGE MEASUREMENTS WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets. -
Page 13: Dc Current Measurements
Read the voltage in the display. Reset the function switch to successively lower V AC positions to obtain a higher resolution reading. The display will indicate the proper decimal point and value. DC CURRENT MEASUREMENTS CAUTION: Do not make current measurements on the 10A scale for longer than 30 seconds. -
Page 14: Resistance Measurements
5. Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the circuit. 6. Apply power to the circuit. 7. Read the current in the display. For mA DC measurements, reset the function switch to successively lower mA DC positions to obtain a higher resolution reading. -
Page 15: Continuity Check
resistance reading. 4. Read the resistance in the display and then set the function switch to the lowest Ω position that is greater than the actual or any anticipated resistance. The display will indicate the proper decimal point and value. CONTINUITY CHECK WARNING: To avoid electric shock, never measure continuity on circuits or wires that have voltage on them. -
Page 16: Battery Test
Turn the rotary switch to the / •))) position. Touch the test probes to the diode under test. Forward voltage will indicate 400 to 700mV. Reverse voltage will indicate “I”. Shorted devices will indicate near 0mV. Shorted devices will indicate near 0mV and an open device will indicate “I”... -
Page 17: Replacing The Batteries
REPLACING THE BATTERIES WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery door. When the batteries become exhausted or drop below the operating voltage, “BAT” will appear in the right-hand side of the LCD display. The batteries should be replaced. - Page 18 out. Install the new fuse into the holder. Always use a fuse of the proper size and value (0.2A/250V fast blow for the 200mA range, 10A/250V fast blow for the 10A range). Put the fuse door back in place. Insert the screw and tighten it securely.
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