Jaycar QM1571 Operating Instructions Manual Download Page 1

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www.procontechnology.com.au

Phone: (03) 98306288

QM1571 OPERATING INSTRUCTIONS

TRUE RMS AUTORANGING DIGITAL MULTIMETER

Summary of Contents for QM1571

Page 1: ...www procontechnology com au Phone 03 98306288 QM1571 OPERATING INSTRUCTIONS TRUE RMS AUTORANGING DIGITAL MULTIMETER ...

Page 2: ...r resistance range or to the diode check or buzzer position Circuits must be de energised and isolated before carrying out resistance tests The rotary function switch must only be turned after removing test connections All external voltages must be disconnected from the instrument before removing the battery Test leads and probes must be in good order clean and with no broken or cracked insulation...

Page 3: ...r to accompanying notes This symbol indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter Caution risk of electric shock 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 ...

Page 4: ...hich the voltage with respect to earth or ground exceeds in this case 1000 VAC or VDC Equipment protected throughout by Double Insulation Class III Equipment complies with current EU directives SYMBOLS AND ANNUNCIATORS Continuity Low Battery Wireless transmit mode Diode test HOLD Data Hold AUTO Auto Ranging AC Alternating Current or Voltage ...

Page 5: ... in use This meter has an Auto OFF capability that automatically shuts the meter OFF after 30 minutes NOTE On some low AC and DC voltage ranges with the test leads not connected the display may show a random changing reading This is normal and is caused by the high input impedance and the input sensitivity The reading will stabilize when connected to a circuit MODE button Selects AC or DC measurem...

Page 6: ...d the meter automatically starts operating in Auto Ranging mode This selects the best range for the measurement being made and is generally the best mode for most manual measurements For data logging measurements or when required the range may be manually selected as follows 1 Press the RANGE button The AUTO indicator on the display will turn off 2 Press the RANGE button to step through the availa...

Page 7: ...equency or duty cycle measurements in AC DC Voltage or Current modes pressing the key will switch to Frequency Duty Cycle measurement mode and then back to voltage or current mode DC AC VOLTAGE MEASUREMENT 1 Insert the black test lead into the negative COM jack and the red test lead into the positive V jack 2 Set the function switch to the Voltage V position 3 Use the MODE button to select AC or D...

Page 8: ...lead banana plug into the mA jack 4 For current measurements up to 10A DC set the function switch to the 10A position and insert the red test lead banana plug into the 10A jack 5 Use the MODE button to select AC or DC Current DC must appear on the display 6 Remove power from the circuit under test then open the point in the circuit where you wish to measure current 7 Touch the black test probe tip...

Page 9: ...d banana plug into the mA jack 4 For current measurements up to 10A AC set the function switch to the 10A position and insert the red test lead banana plug into the 10A jack 5 Use the MODE button to select AC or DC Current AC must appear on the display 6 Remove power from the circuit under test then open the point in the circuit where you wish to measure current 7 Touch the black test probe tip to...

Page 10: ... jack and the red test lead plug into the positive Ω jack Press the MODE button until MΩ appears on the display 3 Touch the test probe tips across the circuit or part under test It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with the reading 4 Read the resistance measurement on the display CONTINUITY CHECK WARNING To avoid electric shock disc...

Page 11: ... the resistance is less than 50Ω an audible signal will sound The display will also show the actual resistance measured between 0Ω and 399 9Ω DIODE TEST WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any diode measurements 1 Set the function switch to the position 2 Insert the black test lead into the COM jack and the red test lea...

Page 12: ...r reading shows OL the diode is good B If both readings show OL the device is open C If both readings are very small or zero the device is shorted NOTE The value indicated on the display during the diode test is the forward voltage of the device CAPACITANCE MEASUREMENT WARNING To avoid electric shock discharge the capacitor under test before making measurements 1 Set the function switch to the CAP...

Page 13: ...k 3 Touch the test probe tips to the circuit under test 4 Read the frequency on the display TEMPERATURE MEASUREMENT 1 Set the function switch to the Temp C F position 2 Insert the Temperature Probe into the input jacks making sure to observe the correct polarity 3 Press the MODE button to select C or F on the display 4 Touch the head of the thermocouple to the item whose temperature you wish to me...

Page 14: ...reless adapter and launch the software supplied 2 Press USB to enter the RF wireless transmit mode 3 The RF icon will appear on the display 4 When communication is established the led indicator on the receiver will blink If not initialize the USB wireless receiver from the software menu selection 5 Up to 3 times per second the data will be displayed on the PC screen plotted and inserted into a lis...

Page 15: ... transients in fixed equipment installations at the distribution level CAT IV meters are designed to protect against transients from the primary supply level overhead or underground utility service Maximum voltage between any terminal and earth ground 1000V DC AC RMS Display 4000 counts LCD display Polarity Automatic negative polarity indication Over range OL indication AC Response True RMS Low ba...

Page 16: ...tude Operating 3000m Storage 10 000m Pollution degree 2 Safety The instrument complies with IEC EN 61010 1 2001 and IEC EN 61010 031 2002 Power 9V battery NEDA 1604 IEC 6F22 Dimensions 182 H x 82 W x55 D mm Weight Approx 380g Enclosure Double moulded waterproof IP67 Accuracy is given at 18 C to 28 C 65 F to 83 F 70 RH DC Voltage Auto ranging Range Resolution Accuracy 400 0mV 0 1mV 4 000V 1mV 0 8 o...

Page 17: ...of reading 40 00V 10mV 3 digits 400 0V 100mV 1000V 1V 1 2 of rdg 5 digits All AC voltage ranges are specified from 5 of range to 100 of range Input Impedance 10MΩ AC Response 50Hz to 400Hz Maximum Input 1000V DC or 1000V AC RMS DC Current Auto ranging Range Resolution Accuracy 400 0µA 0 1µA 4000µA 1µA 1 2 of reading 40 00mA 10µA 3 digits 400 0mA 100µA 10A 10mA 2 5 of reading 3 digits ...

Page 18: ...e AC Current Auto ranging Range Resolution Accuracy 400 0µA 0 1µA 4000µA 1µA 1 5 of rdg 5 digits 40 00mA 10µA 400 0mA 100µA 10A 10mA 3 0 of rdg 5 digits All AC Current ranges are specified from 5 of range to 100 of range Overload Protection FF500mA 1000V and F10AI1000V AC Response 50Hz to 400Hz Maximum Input 400µA AC RMS on µA 400mA AC RMS on mA 10A AC RMS on 10A range ...

Page 19: ...00 0kΩ 100Ω 4 000MΩ 1kΩ 2 5 of rdg 8 digits 40 00MΩ 10kΩ Input Protection 1000V DC or 1000V AC RMS Capacitance Auto ranging Range Resolution Accuracy 40 00nF 10pF 5 0 of rdg 7 dgts 400 0nF 0 1nF 4 000µF 1nF 3 0 of rdg 5 dgts 40 00µF 10nF 100 0µF 0 1µF 5 0 of rdg 7 dgts Input Protection 1000V DC or 1000V AC RMS Frequency Auto ranging Range Resolution Accuracy 4 000Hz 0 001Hz ...

Page 20: ...S when 1MHz Sensitivity 3V RMS when 1MHz Input Protection 1000V DC or 1000V AC RMS Duty Cycle Range Resolution Accuracy 0 1 99 9 0 1 1 2 of rdg 2 dgts Pulse width 100us 100ms Frequency 5Hz to 150kHz Sensitivity 0 5V RMS Overload protection 1000V DC or AC RMS Temperature Range Resolution Accuracy 20o C 760 C 1 C 3 of rdg 5 dgts 4 F 1400 F 1 F 3 of rdg 8 dgts Sensor Type K Thermocouple ...

Page 21: ... digits Open circuit voltage Max 1 5V DC Overload protection 1000V DC or AC RMS Audible continuity Audible threshold Less than 50Ω Test current max 1 5mA Overload protection 1000V DC or AC RMS Accessories Included accessories 1 Standard Red Black lead set with test probes 2 K type thermocouple with adaptor 3 USB wireless receiver with software for data logging 4 Carry pouch ...

Page 22: ...lay The battery should be replaced 2 Follow the instructions for installing a new battery See the Battery Installation instructions below 3 Dispose of the old battery properly NOTE Procon Technology has discovered that the battery warning indication does not work The best way to detect a low battery is to turn on the backlight and when this becomes very dim then the battery should be replaced Note...

Page 23: ...e battery into battery compartment observing the correct polarity 4 Put the battery cover back in place Secure with the two screws NOTE If your meter does not work properly check the fuses and the battery to ensure that they are still good and that they are properly inserted REPLACING THE FUSES WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the...

Page 24: ...are 5 Remove the old fuse from its holder by gently pulling it out If necessary use a screwdriver as a lever 6 Install the new fuse into the holder 7 Always use a fuse of the proper size and value 0 5A 1000V fast blow for the 400mA range SIBA 70 172 40 10A 1000V fast blow for the 10A range SIBA 50 199 06 8 Replace and secure the rear cover battery and battery cover WARNING To avoid electric shock ...

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