Morris 57044 Operating Instruction Download Page 6

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Resistance

(Auto-ranging)

Range

Resolution

Accuracy

400.0

Ω

0.1

Ω

+0.8% of rdg + 4 dgts

4.000k

Ω

+0.8% of rdg + 2 dgts

40.00k

Ω

400.0k

Ω

100

Ω

4.000M

Ω

40.00M

Ω

10k

Ω

+1.2% of rdg + 3 dgts

Input Protection:

250V dc or 250V ac rms.

Capacitance

(Auto-ranging)

Range

Resolution

Accuracy

40.00nF

10pF

+5.0% of rdg+7 dgts

400.0nF

0.1nF

+3.5% of rdg + 5 dgts

4.000µF

1nF

40.00µF

10nF

200.0µF

0.1µF

+5.0% of rdg + 5 dgts

Input Protection:

250V dc or 250V ac rms.

Summary of Contents for 57044

Page 1: ...MODEL 57044 OPERATING INSTRUCTION AUTORANGING MULTIMETER ...

Page 2: ...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 finger guards o...

Page 3: ...indication Low Battery Indication 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 approx 30 minutes of inactivity Operating Environment 0 o C to 50 o C at 70 relative humidity Storage Temperature 20 o C to 60 o C at 80 relative humidity Power Two standard type size AAA 1 5V bat...

Page 4: ...100mV 600V 1V 1 0 of rdg 2 dgts Input Impedance 10MΩ Maximum Input 600V dc or 600V ac rms AC Voltage Auto ranging except 400mV Range Resolution Accuracy 400 0mV 0 1mV 2 0 of rdg 4 dgts 4 000V 1mV 1 5 of rdg 3 dgts 40 00V 10mV 400 0V 100mV 600V 1V 2 0 of rdg 4 dgts Input Impedance 10MΩ Frequency Range 40 to 400Hz 40 to 200Hz for 400mV and 4V ranges Maximum Input 600V dc or 600V ac rms ...

Page 5: ...0mA dc or 400mA ac rms on µA mA ranges 10A dc or ac rms on 10A range AC Current Auto ranging for µA and mA Range Resolution Accuracy 400 0µA 0 1µA 1 8 of rdg 5 dgts 4 000mA 1µA 40 00mA 10µA 400 0mA 100µA 10A 10mA 3 0 of rdg 7 dgts Overload Protection 0 5A 250V and 10A 250V Fuse Frequency Range 40 to 400 Hz 40 to 200 Hz for 400µA and 4mA ranges Maximum Input 400mA dc or 400mA ac rms on µA mA ranges...

Page 6: ...00kΩ 10Ω 400 0kΩ 100Ω 4 000MΩ 1kΩ 40 00MΩ 10kΩ 1 2 of rdg 3 dgts Input Protection 250V dc or 250V ac rms Capacitance Auto ranging Range Resolution Accuracy 40 00nF 10pF 5 0 of rdg 7 dgts 400 0nF 0 1nF 3 5 of rdg 5 dgts 4 000µF 1nF 40 00µF 10nF 200 0µF 0 1µF 5 0 of rdg 5 dgts Input Protection 250V dc or 250V ac rms ...

Page 7: ...More than 100 digits at pulse width 2µSec Overload protection 250V dc or ac rms Duty Cycle Range Resolution Accuracy 0 1 99 9 0 1 1 2 of rdg 2 dgts Pulse width 100µs 100ms Overload protection 250V dc or ac rms Diode Test Test current Resolution Accuracy 1 mA typical 1 mV 10 of rdg 5 dgts Open circuit voltage 2 8V dc typical Overload protection 250V dc or ac rms Audible continuity Audible threshold...

Page 8: ...ion switch is set at OHM DIODE CONTINUITY position Push this button to select Hz Duty Cycle measuring function when function switch is set at Hz Duty Cycle position RANGE CONTROL BUTTON This is the manual range setting switch When power is first switched on auto ranging is automatically selected Whenever this switch is pressed manual range setting is possible Pressing the button once switches to t...

Page 9: ...t overload to the limits except 10A During use connect the black test lead to the COM jack and the red test lead as shown below Function Red lead Connection Input limits mV DC 600V de or ac rms DCV ACV 600V dc or ac rms Ω CONTINUITY DIODE 250V dc or ac rms CAP Hz 250V dc or ac rms µA mA 400mA dc or ac rms A 10A 10A dc or ac rms MEASURING VOLTAGE 1 Connect the black test lead to the COM jack and re...

Page 10: ...polarity of red lead connection will be indicated when making a DC measurement MEASURING RESISTANCE 1 Connect the black test lead to the COM jack and the red test lead to the jack 2 Set the function switch to Ω DIODE CONTINUITY 3 Make sure all the power of the circuit to be measured is off 4 Connect the test leads to the circuit to be measured The range will change automatically and will hold on t...

Page 11: ...iode be tested When measuring the forward voltage across diode a normal diode will indicate 0 4V to 0 7V and the reverse voltage will indicate OL same as on open condition For a short circuited diode a value near 0 mV will be displayed CONTINUITY CHECK 1 Connect the black test lead to the COM jack and the red test lead to the jack 2 Set the function switch to OHM DIODE CONTINUITY 3 To select conti...

Page 12: ...rs are fully discharged 2 The range control mode in capacitance measurement is auto ranging MEASURING FREQUENCY 1 Connect the black test lead to the COM jack and the red test lead to the jack 2 Set the function switch to Hz Duty range 3 Connect the test leads to the circuit to be measured The range will change to display the measured frequency with the best resolution When you push the HZ Button t...

Page 13: ...the accuracy range BATTERY AND FUSE REPLACEMENT If the sign BAT appears on the LCD display it indicates that the battery should be replaced Remove screws on the back cover and open the case Replace the exhausted battery with new batteries 2 x AAA 1 5V batteries UM4 Fuse rarely needs replacement and blows almost always as a result of the operator s error Open the case and replace the blown fuse wit...

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