ATP Instrumentation DM-921 Operating Instruction Download Page 1 | Manualshive

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10A

μ

COM

every

15 min.

MAX

¦¸

V

AUTO

Ω

V

V

Mode

DC
AC

C F

μ

Range

MAX

C F

OPERATING INSTRUCTION

AUTORANGING MULTIMETER

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Summary of Contents for DM-921

Page 1: ...10A μ COM every 15 min MAX V AUTO Ω V V Mode DC AC C F μ Range MAX C F OPERATING INSTRUCTION AUTORANGING MULTIMETER ...

Page 2: ...tential Keep your body isolated from ground by using dry clothing rubber shoes rubber mats or any approved insulating material Turn off power to the circuit under test before cutting unsoldering or breaking the circuit Small amounts of current can be dangerous Use caution when working above 60V dc or 30V ac rms such voltages pose a shock hazard When using the probes keep your fingers behind the fi...

Page 3: ...rsonal injury or damage to the meter This WARNING symbol indicates a potentially hazardous situation which if not avoided could result in death or serious injury This CAUTION symbol indicates a potentially hazardous situation which if not avoided may result damage to the product This symbol advises the user that the terminal s so marked must not be connected to a circuit point at which the voltage...

Page 4: ...d its test leads should not be handled when these terminals are energized CONTROLS AND JACKS 1 2000 count Liquid Crystal Display with symbolic signs 2 Function switch 3 Positive input jack Input Limits Function Maximum Input V DC or V AC CATII 1000V DC AC CATIII 600V DC AC mA DC AC 200mA DC AC A DC AC 10A DC AC 30 seconds max every 15 minutes Resistance Diode test Continuity Temperature 500V DC AC...

Page 5: ... 6 Mode 1 DC AC 8 C F μ 9 Range MAX C F 4 COM negative input jack 5 10A positive input jack for 10A DC or AC measurements 6 Mode pushbutton selection Continuity Diode AC DC Temperature C F 7 Range pushbutton 8 Data Hold pushbutton 9 MAX Hold pushbutton ...

Page 6: ...ss2 Double insulation Overvoltage category CATIII 600V CATII 1000V Display 2000 counts LCD display with function indication Polarity Automatic negative polarity indication Overrange OL mark indication Low battery indication The BAT is displayed when the battery voltage drops below the operating level Measurement rate 2 times per second nominal Auto power off Meter automatically shuts down after ap...

Page 7: ...DA 1604 IEC 6F22 Dimensions 150 H x 70 W x 48 D mm Weight Approx 255g Accuracy is given at 18 oC to 28 oC 65 oF to 83 oF less than 70 RH DC Voltage Auto ranging Range Resolution Accuracy 200 0mV 0 1mV 0 5 of rdg 2 dgts 2 000V 1mV 1 2 of rdg 2 dgts 20 00V 10mV 200 0V 100mV 600V CATIII 1V 1 5 of rdg 2 dgts 1000V CATII 1 5 of rdg 4 dgts Input Impedance 10M Maximum Input 600V dc ac rms CATIII Maximum ...

Page 8: ...0M Frequency Range 50 to 60Hz Maximum Input 600V dc ac rms CATIII Maximum Input 1000V dc ac rms CATII DC Current Auto ranging for uA and mA Range Resolution Accuracy 200 0uA 0 1uA 1 0 of rdg 3 dgts 2000uA 1uA 1 5 of rdg 3 dgts 20 00mA 10uA 200 0mA 100uA 10A 10mA 2 5 of rdg 5 dgts Overload Protection 0 2A 250V and 10A 250V Fuse Maximum Input 200mA dc or 200mA ac rms on uA mA ranges 10A dc or ac rms...

Page 9: ...mum Input 200mA dc or 200mA ac rms on uA mA ranges 10A dc or ac rms on 10A range Clamp on Adaptors DC Current Range Resolution Accuracy 200A 0 1A 1 0 of rdg 3dgts meter only Clamp on Adaptor accuracy not included 2000A 1A Sensor Clamp on Adaptor Note not provide 200A Range Input Sensitivity 1mV A 2000A Range Input Sensitivity 1mV A Overload protection 500V dc or ac rms Clamp on Adaptor AC Current ...

Page 10: ... Overload protection 500V dc or ac rms Resistance Auto ranging Range Resolution Accuracy 200 0 0 1 1 2 of rdg 4 dgts 2 000k 1 1 0 of rdg 2 dgts 20 00k 10 1 2 of rdg 2 dgts 200 0k 100 2 000M 1k 20 00M 10k 2 0 of rdg 3 dgts Input Protection 500V dc or 500V ac rms Temperature Range Resolution Accuracy 50oC 1000oC 1 oC 3 of rdg 5dgts 58oF 1832 oF 1oF 3 of rdg 8dgts Sensor Type K Thermocouple Overload ...

Page 11: ...ent 0 3mA Overload protection 500V dc or ac rms OPERATION 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 This meter has Auto OFF that automatically shuts the meter OFF if 15 minutes elapse between uses 2 If OL appears in the display during...

Page 12: ...age current Temperature C F RANGE BUTTON When the meter is first turned on it automatically goes into AutoRanging This automatically selects the best range for the measurements being made and is generally the best mode for most measurements For measurement situations requiring that a range be manually selected perform the following 1 Press the RANGE button The AUTO display indicator will turn off ...

Page 13: ...measured value is up dated continuously Press once again the button will release the hold and allow a further measurement DC VOLTAGE MEASUREMENTS CAUTION Do not measure DC 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 V DC position mV will appear in the display 2 Insert the black test lead ba...

Page 14: ...cts are recessed deep in the outlets As a result the reading may show 0 volts when the outlet actually has voltage on it Make sure the probe tips are touching the metal contacts inside the outlet before assuming that no voltage is present CAUTION Do not measure AC 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 funct...

Page 15: ...ion and insert the red test lead banana plug into the A jack 3 For current measurements up to 200mA DC set the function switch to the mA range and insert the red test lead banana plug into the mA jack 4 For current measurements up to 10A DC set the function switch to the A position and insert the red test lead banana plug into the 10A jack 5 Press the AC DC button until DC appears in the display 6...

Page 16: ... 1 Insert the black test lead banana plug into the negative COM jack 2 For current measurements up to 2000 A AC set the function switch to the A position and insert the red test lead banana plug into the A jack 3 For current measurements up to 200mA AC set the function switch to the mA range and insert the red test lead banana plug into the mA jack 4 For current measurements up to 10A AC set the f...

Page 17: ...bol CLAMP ON ADAPTOR AC DC CURRENT MEASUREMENTS 1 Set the function switch to the A DC AC clamp on adaptor position 2 Insert the clamp on adaptor black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack 3 Press the MODE button until AC DC appears in the display 4 Press the trigger to open jaw Fully enclose one conductor to be measured 5 Read ...

Page 18: ...st It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading 4 Read the resistance in the display The display will indicate the proper decimal point value and symbol 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 positio...

Page 19: ...ve jack COM and the red test lead banana plug into the positive jack 4 Touch the test probe tips to the diode or semiconductor junction you wish to test Note the meter reading 5 Reverse the probe polarity by switching probe position Note this reading 6 The diode or junction can be evaluated as follows A If one reading shows a value and the other reading shows OL the diode is good B If both reading...

Page 20: ...ead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack making sure to observe the correct polarity 3 Touch the Temperature Probe head to the part whose temperature you wish to measure Keep the probe touching the part under test until the reading stabilizes about 30 seconds 4 Read the temperature in the display The digital reading will indicate the pro...

Page 21: ...attery See the Battery Installation section of this manual 3 Dispose of the old battery properly WARNING To avoid electric shock do not operate your meter until the battery door is in place and fastened securely BATTERY INSTALLATION WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the battery door 1 Disconnect the test leads from the meter 2 Open...

Page 22: ...rce of voltage before removing the fuse door 1 Disconnect the test leads from the meter and any item under test 2 Open the fuse door by loosening the screw on the door using a Phillips head screwdriver 3 Remove the old fuse from its holder by gently pulling it out 3 Install the new fuse into the holder 4 Always use a fuse of the proper size and value 0 2A 250V fast blow for the 200mA range 10A 250...

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