background image

 

Safety symbols:   

Caution refer to this manual before using the meter. 

 

Dangerous voltages. 

 

Meter is protected throughout by double insulation or 
reinforced insulation. 

When servicing, use only specified replacement parts. 
CE

 Comply with EN-61010-1 

 
II

OPERATING PRINCIPLE 

Suppose we wished to measure the resistance of some component 
located a significant distance away from our ohmmeter. Such a 
scenario would be problematic, because an ohmmeter measures 

all

 

resistance  in the circuit loop, which includes the resistance  of the 
wires (R

wire

) connecting the ohmmeter to the component being 

measured (R

subject

): 

 

 
Usually, wire resistance is very small (only a few ohms per hundreds 
of feet, depending primarily on the gauge (size) of the wire), but if 
the connecting wires are very long, and/or the component to be 
measured has a very low resistance anyway, the measurement error 
introduced by wire resistance will be substantial. 

Содержание DT-5302

Страница 1: ...DIGITAL LOW RESISTANCE TESTER INSTRUCTION MANUAL Low Resistance Tester 400m 4 40 V A A 4 2 1 3 1 2 1 1 2...

Страница 2: ...1...

Страница 3: ...current resistance or diode mode Doing so can damage the meter 5 ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance or diode tests 6 ALWAYS turn off...

Страница 4: ...tance away from our ohmmeter Such a scenario would be problematic because an ohmmeter measures all resistance in the circuit loop which includes the resistance of the wires Rwire connecting the ohmmet...

Страница 5: ...same at all points in the circuit because it is a series loop Because we re only measuring voltage dropped across the subject resistance and not the wires resistances though the calculated resistance...

Страница 6: ...nabled or not Operating Temperature 0 C to 40 C 32 F to 104 F and Humidity below 80 RH Storage Temperature 10 C to 60 C 14 F to 140 F and Humidity below 70 RH Power source 6x1 5V Size AA battery or Eq...

Страница 7: ...1K 2 5 3d 40M 10k 3 5 5d DC Current Rang Resolution Accuracy 400 A 0 1 A 1 5 5d 4000 A 1 A 40mA 0 01mA 400mA 0 1mA AC Current Rang Resolution Accuracy 50 60Hz Accuracy 400Hz 400 A 0 1 A 1 5 5d 1 5 5d...

Страница 8: ...Accuracy 50 60Hz Accuracy 400Hz 400mV 0 1 mV 1 2 10d 2 5 10d 4V 1 mV 1 0 10d 1 2 10d 40V 0 01V 1 0 10d 1 2 10d 400V 0 1V 1 0 10d 1 2 10d 750V 1V 1 0 10d 1 2 10d Capacitance Rang Resolution Accuracy 4n...

Страница 9: ...X MIN Button Backlight Button Mode REL Button Rotary Function switch V Cap mA E2 Jack COM E1 jack P2 Jack P1 jack PothooK Battery Cover Low Resistance Tester E P E P 1 2 2 1 V 400m 4 40 V A A AA AA AA...

Страница 10: ...Press the MAX MIN button to begin measurement The indicator MAX or MIN will appear in the display 2 If the MAX MIN messages are flashing the instrument is in MAX MIN mode but not recording press the...

Страница 11: ...ve COM jack 2 For current measurements up to 4000uA set the function switch to the uA position 3 For current measurements up to 400mA set the function switch to the mA range 4 Press the MODE REL butto...

Страница 12: ...one side of the part under test so the rest of the circuit will not interfere with the resistance reading 5 Read the resistance in the display The display will indicate the proper decimal point value...

Страница 13: ...on 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 readings show OL the device is open C...

Страница 14: ...NING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements 1 Insert the red test leads banana plug into E2 P2 red com j...

Страница 15: ...2 Turn the meter off and remove the test leads 3 Unsnap the tilt stand from the rear of the meter 4 Remove the four Phillips head screws holding the battery cover 5 Remove the battery compartment cov...

Страница 16: ...15 V06 08...

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