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Summary of Contents for CEM DT-9929
- Page 1 User's Guide True RMS Industrial Multimeter...
- Page 3 Introduction This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency (electrical & electronic), Duty Cycle, Diode Test, and Continuity plus Thermocouple Temperature. It can store and recall data. It features a waterproof, rugged design for heavy duty use. Proper use and care of this meter will provide many years of reliable service.
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Page 4: Overvoltage Category
PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level. Note – Examples include protected electronic circuits. OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed installation. -
Page 5: 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 Protection Limits Function Maximum Input... - Page 6 ALWAYS turn off the power and disconnect the test leads before opening the covers to replace the fuse or batteries. NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
- Page 7 Symbols and Annunciators •))) Continuity Diode test Battery status nano (10 ) (capacitance) µ micro (10 ) (amps, cap) milli (10 ) (volts, amps) Amps kilo (10 ) (ohms) Farads (capacitance) mega (10 ) (ohms) Ohms PEAK Peak Hold Hertz (frequency) Volts Percent (duty ratio)
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Page 8: Dc Voltage Measurements
Operating Instructions WARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are very dangerous and should be measured with great care. 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. -
Page 9: Ac Voltage (Frequency, Duty Cycle) Measurements
AC VOLTAGE (FREQUENCY, DUTY CYCLE) 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. As a result, the reading may show 0 volts when the outlet actually has voltage on it. -
Page 10: Mv Voltage Measurements
MV VOLTAGE MEASUREMENTS CAUTION: Do not measure mV voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may occur that can damage the meter. 1. Set the function switch to the green mV position. 2. -
Page 11: Dc Current Measurements
DC CURRENT MEASUREMENTS CAUTION: Do not make 20A current measurements for longer than 30 seconds. Exceeding 30 seconds may cause damage to the meter and/or the test leads. 1. Insert the black test lead banana plug into the negative COM jack. 2. -
Page 12: Ac Current (Frequency, Duty Cycle) Measurements
AC CURRENT (FREQUENCY, DUTY CYCLE) MEASUREMENTS CAUTION: Do not make 20A current measurements for longer than 30 seconds. Exceeding 30 seconds may cause damage to the meter and/or the test leads. Insert the black test lead banana plug into the negative COM jack. -
Page 13: Resistance Measurements
RESISTANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements. Remove the batteries and unplug the line cords. 1. Set the function switch to the green Ω CAP position. -
Page 14: Continuity Check
CONTINUITY CHECK WARNING: To avoid electric shock, never measure continuity on circuits or wires that have voltage on them. 1. Set the function switch to the green Ω CAP position. 2. Insert the black lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive ... -
Page 15: Capacitance Measurements
CAPACITANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements. Remove the batteries and unplug the line cords. 1. Set the rotary function switch to the green Ω CAP position. -
Page 16: Autoranging/Manual Range Selection
FREQUENCY (DUTY CYCLE) MEASUREMENTS (ELECTRONIC) 1. Set the rotary function switch to the green Hz/% position. 2. Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive Hz jack. 3. -
Page 17: Relative Mode
MAX/MIN 1. Press the MAX/MIN key to activate the MAX/MIN recording mode. The display icon "MAX" will appear. The meterleft auxiliary displaywill display and hold the maximum reading and will update only when a new “max” occurs.The display icon "MIN" will appear. The right auxiliary displaymeter will display and hold the minimum reading and will update only when a new “min”... - Page 18 PEAK HOLD The Peak Hold function captures the peak AC or DC voltage or current. The meter can capture negative or positive peaks as fast as 1 millisecond in duration. Momentarily press the PEAK button, “PEAK” and “MAX” will display in left auxiliary display. MIN” will display in right auxiliary display.
- Page 19 To finish above STORE function, press EXIT button shortly. If you want to clean all the memory data, the steps are: When power on, press the EXIT button long time, and then turn the switch from OFF to random, and release the EXIT button, the LCD will flash thrice and meantime buzzer thrice, which meansall memory data have been cleaned.
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Page 20: Low Battery Indication
AC+DC In all the measuring mode VAC,mV(AC),10A(AC),mA(AC),uA(AC), press button EXIT for 2seconds to enters into AC+DC testing. The precision is the same as AC measure. LCD shows AC+DC signal. Press button EXIT to exit. LOW BATTERY INDICATION When the icon appears alone in the display , the battery should be replaced. -
Page 21: Battery Installation
6. IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME, the batteries should be removed to prevent damage to the unit. BATTERY INSTALLATION WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover. 1. -
Page 22: Replacing The Fuses
REPLACING THE FUSES WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the meter cover. 1. Disconnect the test leads from the meter. 2. Remove the protective rubber holster. 3. Remove the battery cover (two “B” screws) and the battery. 4. - Page 23 Specifications Function Range Resolution Accuracy DC Voltage 400mV 0.01mV 0.0001V (0.06% reading + 4digits) 0.001V 400V 0.01V (0.1% reading + 5digits) 1000V 0.1V AC Voltage 50 to 1000Hz (1.0% reading + 40digits) (AC+DC) 400mV 0.01mV 0.0001V 0.001V ...
- Page 24 NOTE: Accuracy is stated at 65 F to 83 F (18 C to 28 C) and less than 75% RH. AC switch according to the calibration of sine wave. It generally increase (2% reading + 2% full scale) if non sine wave in the wave crest less than 3.0.
- Page 25 Sensitivity: 0.8V rms min. @ 20% to 80% duty cycle and <100kHz; 5Vrms min @ 20% to 80% duty cycle and > 100kHz. (0.5% reading) Frequency 40.00Hz-10KHz 0.01Hz - 0.001KHz (electrical) Sensitivity:1Vrms (1.2% reading + 2 digits) Duty Cycle 0.1 to 99.90% 0.01% Pulse width: 100µs - 100ms, Frequency: 5Hz to 150kHz...
- Page 26 Store capacitance 2000 Enclosure Double molded, waterproof Shock (Drop Test) 6.5 feet (2 meters) Diode Test Test current of 0.9mA maximum, open circuit voltage 2.8V DC typical Continuity Check Audible signal will sound if the resistance is less than 35 (approx.), test current <0.35mA PEAK Captures peaks >1ms...
- Page 27 Battery One 9 volt (NEDA 1604) battery Fuses mA, µA ranges; 0.5A/1000V ceramic fast blow A range; 10A/1000V ceramic fast blow Operating Temperature 41ºF to 104ºF (5ºC to 40ºC) Storage Temperature F to 140 F (-20 C to 60 Operating Humidity Max 80% up to 87ºF (31ºC) decreasing linearly to 50% at 104ºF (40ºC) Storage Humidity...
- Page 28 V06/08...
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