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Safety Symbols

This marking adjacent to another marking,  terminal, or
operating device indicates that the operator must refer to
the explanation in the operating instructions to avoid
damage to the equipment and/or to avoid personal injury.

This WARNING sign denotes a hazard. It calls attention to
a procedure, practice or the like, which if not correctly
performed or adhered to, could result in personal injury.

This CAUTION sign denotes a hazard. It calls attention to
a procedure, practice or the like, which, if not correctly
adhered to, could result in damage to or destruction of part
or all of the instrument.

This marking advises the user that the terminal(s) so
marked must not be connected to a circuit point 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 protected
completely be the double insulation.

2. Introduction

This meter is a 3 3/4 digit digital multimeter that is rugged, reliable
and convenient to use, while providing all of the accuracy and
features needed for any application. It performs DC/AC voltage,
DC/AC current, resistance, transistor h

FE

test, capacitance,

frequency, diode, continuity test, and has Auto Power Off.
It is designed for the professional at work in the field or in the
laboratory, even hobby and home applications.

!

WARNING

CAUTION

500V max.

-4-

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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