AUTORANGING

MULTIMETER

■ STOCK No.59315 ■ PART No.DMM11

• INSTRUCTIONS •

IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY TO ENSURE

THE SAFE AND EFFECTIVE USE OF THIS TOOL.

12/99

INTRODUCTION

Autoranging Multimeter

This multimeter is ideal for general electrical and automotive use.

FEATURES

■ 13 position rotary function and range selector.

■ Recessed input terminals for added safety.

■ Measures A.C./D.C. voltage, A.C./D.C. amps, frequency, resistance and capacitance.

■ 200mA fuse protection.

■ Audible continuity buzzer.

■ Diode test facility.

■ Hi-impact rubber case with integral stands.

■ Supplied with test leads, probes and battery.

SPECIFICATION

■ D.C. Voltage: 3.26V, 32.6V, 326V (accuracy +/- 0.3% of rdg. +/- 2 digits). 326mV, 1000V,

(accuracy +/- 0.5% of rdg. +/- 2 digits).

■ A.C. Voltage: 3.26V, 32.6V, 326V, 750V (accuracy +/- 0.8% of rdg. +/- 3 digits).

■ D.C. Amps: 326µA, 3260µA, 32.6mA, 326mA, (accuracy +/- 1.3% of rdg. +/- 3 digits). 10A,

(accuracy +/- 2.0% of rdg. +/- 5 digits).

■ A.C. Amps: 326µA, 3260µA, 32.6mA, 326mA, (accuracy +/- 1.5% of rdg. +/- 5 digits).

■ Resistance: 326

Ω

, (accuracy +/- 0.8% of rdg. +/- 3 digits). 3.26K

Ω

, 32.6K

Ω

, 326K

Ω

,

3.26M

Ω

, (accuracy +/- 0.8% of rdg. +/- 1 digit). 32.6M

Ω

, (accuracy +/- 1.2% of rdg. +/- 2 digits).

■ Frequency: 32.6KHz (accuracy +/- 1.2% of rdg. +/- 3 digits). 200KHz (accuracy +/- 2.5% of rdg. +/- 3 digits).

■ Capacitance (manual ranging): 326nF, 32.6µf, (accuracy +/- 3.0% of rdg. +/- 5 digits).

WARNING:

To avoid electric shock remove test leads before opening cover. To prevent risk of fire use only the correct fuse as shown on the rear cover of the meter. (Fuse is bypassed on 20A setting, ensure you refer to point 5 and 6 on page 3).

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Fig 1.

MAINTENANCE

The fuse rarely needs replacing, and almost always a blown fuse is the result of operator error. (see warning on front page).

If the meter battery is in need of replacement, ‘ ’ will appear on the display.

ACCESSORIES

PART No: YDMM7

STOCK No: 53549

DESCRIPTION: Multimeter Crocodile clip and Probe Set.

PART No:

STOCK No:

YDMM7

53548

DESCRIPTION: Spare Probe Set.

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✢✌

✕✔✌

✙✌

✚✌

KNOW YOUR MULTIMETER

✖✌

✛✌

✕✌

✜✌

✘✌

✗✌

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KNOW YOUR MULTIMETER

1.

Autoranging Function Switch

This switch is used to select the function and desired range.

2.

Display

LCD display unit.

3.

‘COM’ Jack Socket

Plug in the black (negative) test lead.

4.

‘V/

Ω

/F (voltage/resistance/frequency) Jack Socket (max 200mA)

Plug in the red (positive) test lead for all voltage, resistance and amperage (max 200mA) measurements.

5. ‘ 10A’ Jack socket (max 10A)

Plug in the red (positive) test lead for measuring amperage to a minimum of 200mA, to a maximum of 10A.

6.

‘mA/Cx’ (amps/capacitance) Jack Socket (max 300mA)

Plug in the red (positive) test lead for measuring all amperage and capacitance values up to a maximum of 300A.

7.

Transistor Test Socket

Suitable for both NPN and PNP transistors.

8.

A.C./D.C. Amps or Selecting Button

Suitable for diode or continuity testing.

9.

Range Control Button

For selecting measurement reading ranges on LCD display unit.

10.

Data Hold Button

For storing measurement readings in a memory system. To clear or cancel the reading automatically, turn the autoranging function switch to another function/setting.

OTHER METER MARKINGS/READINGS

Diode or continuity test modes have been selected.

Caution (see note 5 above and warning on page 1).

µA,mA,A

Indicates that the meter battery voltage has dropped excessively.

Units for current measurements.

mV, V

Units for voltage measurements.

Ω

,K

Ω

, M

Ω

Units for resistance measurements.

Indicates low battery.

ACV

DCV

DCA

OHM

OL

Caution, risk of electric shock.

AC Voltage ranges.

DC Voltage ranges.

DC Current ranges.

Resistance ranges.

Indicates overload.

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OPERATION

WARNINGS:

Before you use the instrument, inspect the test leads, connectors and probes for damage e.g.

cracks or breaks in the insulation. Replace any defective leads before use. If the voltage to be measured is not known, set the selector switch to the highest range and reduce until a satisfactory reading is obtained.

DC Voltage Measurement

1. Connect the red test lead to the ‘V/

Ω

/F’ jack socket and the black lead to the ‘COM’ jack socket.

2. Set the selector switch to the desired D.C.V. range (V ... ).

3. Connect the test leads to the circuit to be measured.

4. Turn on the power to the circuit to be measured, the value should appear on the digital display along with the voltage polarity (if reversed only).

AC Voltage Measurement

1. Connect the red test lead to the ‘V/

Ω

/mA’ jack socket and the black lead to the ‘COM’ jack socket.

2. Set the selector switch to the desired A.C.V. range (V~).

3. Connect the test leads to the circuit to be measured.

4. Turn on the power to the circuit to be measured. The voltage value will appear on the digital display.

Current Measurement

1. Connect the red test lead to the ‘mA’ or ‘A’ jack socket and the black lead to the ‘COM jack socket. (For measurements between 200mA and 10A connect the red test lead to the

‘A’ socket. (Max. 20A).

2. Set the selector switch to the desired A.C./D.C. range (µA, mA or A) and push the ‘ .../~’ button.

3. Open the circuit to be measured and connect the test leads IN SERIES with the load in which current is to be measured. (See Fig. 1).

4. Turn on the power to the circuit to be measured the ‘AMPERAGE’ value should appear on the digital display.

Resistance Measurement

1. Connect the red test lead to the ‘V/

Ω

/F’ jack socket and the black lead to the ‘COM’ jack socket.

2. Set the selector switch to the OHM position (

Ω

).

3. WARNING: If the resistance to be measured is part of a circuit, turn off the power and discharge all capacitors before measurement. If the reading is less than 200M

Ω

, the display will show 1M

Ω

, this figure should be subtracted from measurement results.

4. Connect the test leads to the circuit to be measured.

5. The resistance value should now appear on the digital display.

Diode Measurement

1. Connect the red test lead to the ‘V/

Ω

/F’ jack socket and the black lead to the ‘COM’ jack socket.

2. Set the selector switch to the position.

3. Connect the red test lead to the anode of the diode to be measured and the black test lead to the cathode.

4. The forward voltage drop in mV will be displayed. If the diode is reversed, the figure ‘1’ should show on the display.

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Transistor hFE Test

1. Set the selector switch to the hFE position.

2. Determine whether the transistor is NPN or PNP.

3. Locate the emitter (E), base (B) or (C)and collect legs into the correct holes in the socket on the front panel.

4. The display will read the approximate hFE value at the test condition of base current

10µA VCE 3.2V.

Frequency Measurement

1. Connect the red test lead to the ‘V/

Ω

/F’ jack socket and the black lead to the ‘COM’ jack socket.

2. Set the selector switch to the Hz position and the range button to 20KHz.

3. Connect the test leads to the circuit/source to be measured.

4. The frequency value should now be displayed on the digital display.

Note: Readings can be taken from input voltages above 10Vms, but the accuracy is not guaranteed. In noisy environments, it is recommended that shielded cables are used for measuring small signals.

Capacitance Measurement

1. Set the selector switch to the desired setting within the ‘F’ range (nF or µF).

NOTE: The range control mode in capacitance measurement is manual ranging and only two ranges (326nF, 32.6µF) are provided. If the range control button is used in this function measurement, decimal points may appear in wrong positions.

2. Before testing the capacitor be sure that the capacitor has been fully discharged.

3. When measuring capacitors with short leads, a testing adaptor has been provided. Insert the adaptor into the testing sockets, but remember to remove it before selecting another function, to avoid the risk of an electric shock.

4. Once the capacitor has been placed into the testing sockets, the capacitance value will be displayed on the digital display.

Continuity Diode Test

1. Connect the red test lead to the V/

Ω

/F jack socket and the black lead to the ‘COM’ jack socket.

2. Set the selector switch to the position.

3. Connect the test leads to the circuit/source to be tested.

4. If continuity exists (i.e. resistance is less than 50

Ω

) the audible buzzer will sound.

Autoranging Feature

1. Ranges for A.C./D.C. voltage, A.C./D.C. amps (µA and mA only), resistance and frequency can be measured manually or automatically by following this sequence: a. Set the selector function switch to the required function.

b. Press the red range button until ‘R-H’ is displayed in the top left hand corner of the LCD screen.

c. To change the range, press the red range button until the desired measurement range is displayed.

d. To turn the autoranging feature to manual, depress and hold the red range button down for more than three seconds.

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DRAPER TOOLS LIMITED,

Hursley Road, Chandler's Ford,

Eastleigh, Hants. SO53 1YF. England.

Tel: (023) 8026 6355.

Fax: (023) 8026 0784.

YOUR DRAPER STOCKIST

©Published by Draper Tools Ltd.

No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical photocopying, recording or otherwise without prior permission in writing from Draper Tools Ltd.