protech QM1549 User Manual Download Page 5

Hz/%Duty 
Button

•  Press the button to choose frequency or duty cycle 

in the range of frequency.

•  Press the button to measure frequency or duty cycle 

while measuring voltage or current. Refer to the 
table on page 14 for suggested frequency ranges.

•  Press the button again to return to measuring 

voltage or current.

Data Hold

•  Press the the HOLD button to hold a measurement 

on-screen for reference at a later time. ‘HOLD’ will 
display on the screen.

•  Press the HOLD button again to return back to 

normal measurements.

Input Jacks

•  VΩCAP: Positive input terminal.
•  COM: Negative input terminal.
• µA mA: Positive input terminal.
•  10A: Positive input terminal for 10A currents.

Auto Power 
Off

The auto power off feature will turn the meter off 
after 15 minutes of inactivity. 

Low Battery 
Indication 

BAT will appear on screen when the battery voltage 
drops below the operating level.

5

Summary of Contents for QM1549

Page 1: ...RELATIVE MODE DATA HOLD 4000 DISPLAY COUNT CAT IV 600V LIFETIME WARRANTY Autoranging True RMS IP67 Digital Multimeter SPECIALIST...

Page 2: ...g this manual for ease of reference Improper use of this meter can cause damage shock injury or death Always remove the test leads before replacing the battery or fuses Before using the meter please i...

Page 3: ...Hz Up to 10MHz FUNCTIONS Continuity Yes Data Hold Yes Relative Measurement Yes Diode Test Yes Duty Cycle Yes Autoranging Yes LCD Backlight Yes Auto Power Off Yes The fuse battery compartment are at th...

Page 4: ...continuity and capacitance It also allows you to select between AC or DC current measurements Function Switch Select a measurement range by turning the switch to the preferred option LCD Screen Readi...

Page 5: ...the HOLD button to hold a measurement on screen for reference at a later time HOLD will display on the screen Press the HOLD button again to return back to normal measurements Input Jacks V CAP Positi...

Page 6: ...to observe the correct polarity red lead to positive black lead to negative 5 Read the voltage in the display The display will indicate the proper decimal point and value If the polarity is reversed t...

Page 7: ...d insert the red test lead banana plug into the mA jack 10A DC set the function switch to the A position and insert the red test lead banana plug into the 10A jack 3 Press the mode button until DC app...

Page 8: ...king any resistance measurements Remove the batteries and unplug the line cords 1 Set the function switch to the position 2 Insert the black test lead banana plug into the negative jack COM and the re...

Page 9: ...ng the diode check is the forward voltage CAPACITANCE MEASUREMENTS WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any capacitance me...

Page 10: ...Range 50 400Hz All AC voltage ranges are specified from 5 to 100 of range All AC voltages are autoranging except for 400mV RANGE RESOLUTION ACCURACY 400mV 0 1mV 0 5 reading 2 digits 4V 1mV 1 2 reading...

Page 11: ...00 A 1 A 1 5 reading 3 digits 40mA 10 A 400mA 100 A 10A 10mA 2 5 reading 5 digits Overload Protection 0 5A 1000V and 10A 1000V fuse Maximum Inputs 400mA DC RMS on A mA ranges 10A DC RMS on 10A range A...

Page 12: ...C or 600VAC RMS DUTY CYCLE RANGE RESOLUTION ACCURACY 0 1 99 9 0 1 1 2 reading 2 digits 12 Pulse Width 100 s 100ms Frequency Width 5Hz 150kHz Sensitivity 0 8V RMS Overload Protection 600VDC or 600VAC R...

Page 13: ...ng 4 digits FREQUENCY Overload Protection 600VDC or 600VAC RMS Sensitivity 0 8V RMS while 1MHz 3V RMS while 1MHz 13 THRESHOLD TEST CURRENT Less than 150 0 3mA AUDIBLE CONTINUITY Overload Protection 60...

Page 14: ...tery cover back in place secure with the screws REPLACING FUSES 1 Turn power off and disconnect the test leads from the meter 2 Remove the cover 3 Gently remove the old fuse and install the new fuse i...

Page 15: ...Low Battery Indication BAT is displayed if battery voltage drops below operating voltage Battery 1 x 9V Operating Temperature 0 C to 50 C Storage Temperature 20 C to 60 C Operating Humidity 70 Storage...

Page 16: ...pect your product is defective faulty cease using the product when the suspected defect fault arises and return the product along with proof of purchase to the place of purchase or distributor for ass...

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