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4-2. Measurement Specifications

Accuracy is  +(% of r number in last digit) at 73

O

F (23

O

C)

+9

O

F (+5

O

C), <75% RH.

DC Voltage

400mV

100

m

V

+(0.5% of rdg+3dgt)

250V~

4V

1mV

+(0.5% of rdg+3dgt)

600V~

40V

10mV

+(0.5% of rdg+3dgt)

600V~

400V

100mV

+(0.5% of rdg+3dgt)

600V~

600V

1V

+(0.8% of rdg+2dgt)

600V~

Impedance: 10M

W

Note: Maximum voltage from “V

W

W

mA” socket to “COM” socket is 600V~, from “COM

socket to earth is 300V~.

AC Voltage

400mV

100

m

V

+(1.2% of rdg+3dgt)

250V~

4V

1mV

+(0.8% of rdg+3dgt)

600V~

40V

10mV

+(0.8% of rdg+3dgt)

600V~

400V

100mV

+(0.8% of rdg+3dgt)

600V~

600V

1V

+(1.2% of rdg+3dgt)

600V~

Frequency Response: 40-400Hz (40 - 100Hz on 600V range).

Resistance

400

W

0.1

W

+(1.0% of rdg+3dgt)

4k

W

1

W

+(1.0% of rdg+3dgt)

40k

W

10

W

+(1.0% of rdg+3dgt)

250V DC/ACrms

400k

W

100

W

+(1.0% of rdg+3dgt)

4M

W

1k

W

+(1.0% of rdg+3dgt)

40M

W

10k

W

+(2.0% of rdg+3dgt)

DC Current

400

m

A

0.1

m

A

+(1.2% of rdg+3dgt)

Protected by

4000

m

A

1

m

A

+(1.2% of rdg+3dgt)

Fast

40mA

10

m

A

+(1.5% of rdg+3dgt)

0.5A/250V

400mA

100

m

A

+(1.5% of rdg+3dgt)

Fuse

10A

1mA

+(2.0% of rdg+5dgt)

10A/250V Fuse

Caution: Maximum operation time is 15 seconds on 10A scale.

(5) Frequency and Duty Cycle Measurement

1. Connect the black test lead to the “COM” socket and the red test lead to

the “V

W

Hz” socket.

2. Set the selector switch to the “Hz” or “Duty” position.
3. Connect the probes across the source or load under measurement.

(6) h

FE

Test

1. Set the selector switch to the desired “h

FE

” position (PNP or NPN type

transistor).

2. Never apply an external voltage to the h

FE

sockets. Damage to the meter

may result.

3. Plug the transistor directly into the h

FE

socket. The socket is labeled E, B,

and C for Emitter, Base, and Collector.

4. Read the h

FE

(beta or DC current gain) in the display.

(7) Relative Value Display

Press the “REL” button on the meter to use the relative measurement
mode. The present value will be stored in memory. The new display value
is equal to the measurement value minus the stored value.

Example:

When you test the capacitance, you can use the Relative function to
eliminate the zero error.

(8) Auto Power Off and Disable

1. When the meter has been turned on for 15 minutes without any action

from the users, the meter will automatically turn itself off.

2. To disable the Auto Power Off function, press any button when the meter

is on or switch the selector switch.

Range

Resolution

Accuracy

Maximum Input

Range

Resolution

Accuracy

Maximum Input

Range

Resolution

Accuracy

Overload Protection

Range

Resolution

Accuracy

Overload Protection

-6-

-11-

Содержание M-1750

Страница 1: ...onics Inc 150 W Carpenter Avenue Wheeling IL 60090 847 541 3800 http www elenco com e mail elenco elenco com OPERATOR S INSTRUCTION MANUAL M 1750 3 3 4 COUNT DIGITAL MULTIMETER Copyright 2003 ElencoTM Electronics Inc ...

Страница 2: ...re and Maintenance 12 6 1 Caring for Your Multimeter 13 6 2 Maintenance 13 WARNING PLEASE READ THIS INSTRUCTION MANUAL CAREFULLY Misuse and or abuse of this instruction cannot be prevented by any printed word and may cause injury and or equipment damage Please follow all these instructions and measurement procedures faithfully and adhere to all standard industrial safety rules and practices The mu...

Страница 3: ...aged or if you suspect that the meter is not operating properly Turn off the 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 60VDC or 30VAC rms Such voltages pose a shock hazard When using the test lead keep your fingers behind the guards on the test lead Disconnect the live test lead before...

Страница 4: ...nt at which the voltage with respect to earth ground exceeds in this case 500 volts This symbol adjacent to one or more terminals identifies them as being associated with ranges that may in normal use be subjected to particularly hazardous voltages For maximum safety the instrument and its test leads should not be handled when these terminals are energized This marking indicates that equipment is ...

Страница 5: ... terminals 2 Remove the screws from the bottom case and lift the case Remove the spent batteries and replace them with batteries of the same type Fuse Replacement Remove the screws from the bottom case and lift the case Replace the fuse with the same type and rating 5 x 20mm 0 5A 250V fast blow fuse or 5 x 20mm 10 250V fast blow fuse as the replacements 3 Features 9 Functions 23 Measuring Ranges S...

Страница 6: ...ad to the COM socket and the red test lead to the VWHz socket 2 Set the selector switch to the Hz or Duty position 3 Connect the probes across the source or load under measurement 6 hFE Test 1 Set the selector switch to the desired hFE position PNP or NPN type transistor 2 Never apply an external voltage to the hFE sockets Damage to the meter may result 3 Plug the transistor directly into the hFE ...

Страница 7: ...ure that the circuit to be tested is dead Max input overload 250Vrms and 10sec 4 Capacitance Measurement 1 Before testing discharge the capacitor by shorting its leads together Use caution in handling the capacitors because they may have a charge on them of considerable power before discharging 2 Connect the black test lead to the COM socket and the red test lead to the VWHz socket 3 Set the selec...

Страница 8: ...art with the highest and work your way down 7 Extreme care should be taken when using the instrument in conjunction with a current transformer connected to the terminals if an open circuit occurs 8 Ensure that the test leads and probes are in good condition with no damage to the insulation 9 Take care not to exceed the overload limits as shown in the specifications 10 Before opening the case of th...

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