allsun allsun Automotive Multimeter DMM DC Volt Ohm Temp Frequency Diode & Continuity Tester Automotive Diagnosis Tester Test RPM Dwell Angle User manual

127

Digital Automotive Multimeter

Read this manual thoroughly before use

Users Manual

1

This instrument is warranted to be free from defects in material

and workmanship for a period of one year. Any instrument

found defective within one year from the delivery date and

returned to the factory with transportation charges prepaid, will

be repaired, adjusted, or replaced at no charge to the original

purchaser. This warranty does not cover expandable items

such as battery or fuse. If the defect has been caused by a

misuse or abnormal operating conditions, the repair will be

billed at a nominal cost.

WARRANTY

This meter is a compact 3 1/2-digit digital automotive

multimeter. In addition to the features of a normal multimeter,

it can also be used to measure RPM, dwell angle, duty cycle,

battery, temperature, ignition system, and etc. It is very

useful and is an ideal measurement tool for automotive repair

and service.

It can be used to measure:

1. RPM of engine

2. Dwell angle

3. Battery

4. Duty cycle

5. DC voltage

6. DC current

INTRODUCTION

2

7. Resistance

8. Frequency

9. Diode

10. Continuity

11. Temperature

12. Ignition system

Warning

To avoid possible electric shock or personal injury, follow

these guidelines:

1. Do not use the meter if it is damaged. Before you use

the meter, inspect the case. Pay particular attention to

the insulation surrounding the connectors.

2. Inspect the test leads for damaged insulation or exposed

metal. Check the test leads for continuity. Replace

damaged test leads before you use the meter.

3. Do not use the meter if it operates abnormally. Protection

may be impaired. When in doubt, have the meter

serviced.

4. Do not operate the meter around explosive gas, vapor,

or dust.

5. Do not apply more than the rated voltage, as marked on

the meter, between terminals or between any terminal

and earth ground.

6. Before use, verify the meter's operation by measuring a

known voltage.

7. When measuring current, turn off circuit power before

connecting the meter in the circuit. Remember to place

the meter in series with the circuit.

3

8. When servicing the meter, use only specified

replacement parts.

9. Use caution when working with voltage above 30V ac

rms, 42V peak, or 60V dc. Such voltages pose a shock

hazard.

10. When using the probes, keep your fingers behind the

finger guards on the probes.

11. When making connections, connect the common test

lead before you connect the live test lead. When you

disconnect test leads, disconnect the live test lead first.

12. Remove the test leads from the meter before you open

the battery cover or the case.

13. Do not operate the meter with the battery cover or portions

of the case removed or loosened.

14. To avoid false readings, which could lead to possible

electric shock or personal injury, replace the batteries as

soon as the low battery indicator ( ) appears.

15. To avoid electric shock, do not touch any naked conductor

with your hand or skin. Do not ground yourself while using

the meter.

16. Comply with local and national safety requirements. Use

correct protective equipment when you work in hazardous

areas.

17. Always follow vehicle manufacturer's warnings, cautions

and service procedures.

18. Never smoke or have open flames near vehicle.

19. Always operate the vehicle in a well ventilated area. Do

not inhale exhaust gases or fuel vapors.

4

Caution

To avoid possible damage to the meter or to the equipment

under test, follow these guidelines:

1. Disconnect circuit power and discharge all capacitors

before testing resistance, diode, continuity and

temperature.

2. Use the proper terminals, function and range for your

measurements.

3. Before rotating the range switch to change functions,

disconnect test leads from the circuit under test.

Symbols

Direct Current

Caution, risk of danger, refer to the operating manual

before use.

Caution, risk of electric shock.

Earth (ground) Terminal

Fuse

Conforms to European Union directives

The equipment is protected throughout by double

insulation or reinforced insulation.

STRUCTURE

1. Display

3

1

/2 digit LCD, with a max. reading of 1999

2. " Low " LED / " HV " LED

a. In ignition system test, this LED will flash if the spark

plug wire is delivering spark.

b. In battery test, this LED will light if the battery is low.

3. " Normal " LED

In battery test, this LED will light if the battery is normal.

4. " High " LED

In battery test, this LED will light if the battery is high.

7 8 9

10

11

1

2

3

4

5

6

5

Figure 1

5. Power Switch

Used to turn on or off the meter.

6. Function / Range Switch

Used to select desired function and range as well as to

turn on off the meter.

7. " 10A " Terminal

Plug-in connector for the red test lead for current

measurements.

8. " COM " Terminal

Plug-in connector for the black test lead.

9. " INPUT " Terminal

Plug-in connector for the red test lead for all

measurements except current measurements

10. Holster

11. " HOLD " Button

Used to enter or exit Data Hold mode.

6

7

GENGRAL SPECIFICATION

Fuse Protection for " 10A " Jack Inputs: 10A/250V Fast

Fuse

Display: 3

1

/2-digit LCD, with a max. reading of 1999

Overrange Indication: only figure " 1 " shown on the

display

Negative Polarity Indication: " - " displayed automatically

Sampling Rate: about 2~3 times/sec

Operating Environment: temperature: 0°C ~ 40°C

relative humidity: < 75%

Storage Environment: temperature: -20°C ~ 60°C

relative humidity: < 85%

Operating Altitude: 0 to 2000 meters

Battery: 9V, 6F22 or equivalent

Low Battery Indication: " " shown on the display

Dimensions: 156X78X58mm

Weight: about 290g ( including battery )

8

**

DC Current

Max. Permitted Input: 10A

( For inputs > 2A: measurement duration < 10 secs,

interval >15 minutes )

Overload Protection: Fuse, 10A/250V, Fast action

10A 0.01A ± (2.0%+5)

Input Impedance: 10M

20V

35V

0.01V

0.1V

± (0.5% + 5)

± (1.0% + 5)

SPECIFICATIONS

Accuracy is specified for a period of one year after

calibration and at 18°C to 28°C, with relative humidity < 75%.

Accuracy specifications take the form of:

± ([% of Reading]+[number of Least Significant Digits])

DC Voltage

ResolutionRange Accuracy

9

Frequency

20kHz

0.01kHz ± (1.5%+5)

Measurement Range: 1Vp ~ 35Vp

Duty Cycle

5% ~ 95% 0.1% ± (2.5%+5)

Measurement Range: 6Vp ~ 35Vp

Frequency Range: 40Hz ~ 1kHz

Resistance

200

2k

20k

200k

0.1k

0.001k

0.01k

0.1 ± (1.2%+5)

± (1.0%+5)

20M 0.01M ± (1.5%+5)

ResolutionRange Accuracy

Range Description

Diode and Continuity

*** ****

0°C ~ 400°C: ± (1.5%+5)

1°C

> 400°C: ± (2.0%+5)

Temperature

0°C ~ 1000°C

Resolution AccuracyRange

10

Open Circuit Voltage:

about 2.8V

Test Condition

Open Circuit Voltage:

about 2.8V

The approx. forward

voltage drop of the

diode will be displayed.

The built-in buzzer will

sound if the resistance

is less than about 30 .

Note :

1. The above accuracy does not include error of the

thermocouple probe.

2. Accuracy specification assumes ambient temperature

is stable to ±1°C. For ambient temperature changes of

±5°C, rated accuracy applies after 1 hour.

Battery

12V

24 0.1V

0.01V

Resolution DescriptionRange

Note: Do not measure a battery whose rating is higher than

24V.

10RPM ± (2.5%+5)

Measurement Range: 6Vp ~ 35Vp

For 4-stroke engines:

actual rotation speed = displayed reading × 10;

For 2-stroke engines:

actual rotation speed = 50% × ( displayed reading × 10 )

Tach ( rotation speed )

0RPM ~

20000RPM

If the battery is low, the "Low"

LED will light. If the battery is

normal, the "Normal" LED will

light. If the battery is high, the

"High" LED will light.

The display will show the approx.

voltage at the same time.

11

Range

Number of

Cylinders

Accuracy

The Highest

Resolution

3 cylinders

4 cylinders

5 cylinders

6 cylinders

8 cylinders

12

OPERATION INSTRUCTION

Data Hold Mode

Press the " HOLD " button to hold the present reading on the

display. " " appears on the display as an indicator. To exit

the Data Hold mode, press the button again. " " disappears.

0.1

°

± (2.5%+5)

Input Voltage: 6Vp ~ 35Vp

Rotation Speed of Engine: 0RPM ~ 20000kRPM

Dwell Angle

0 ~ 120

°

0 ~ 90

°

0 ~ 72

°

0 ~ 60

°

0 ~ 45

°

3 cylinders

4 cylinders

5 cylinders

6 cylinders

8 cylinders

Range

Number of

Cylinders

AccuracyResolution

13

1. Connect the black test lead to the " COM " jack and the

red test lead to the " INPUT " jack.

2. Set the range switch to desired range.

3. Connect the test leads across the circuit or source to be

measured.

4. Read the reading on the display. The polarity of the red

lead connection will be indicated as well.

Note :

To avoid damages to the meter, do not attempt to measure a

DC voltage higher than 35V although readings may be

obtained.

Measuring DC Voltage

Figure 2

Measuring DC Current

14

1. Connect the black test lead to the " COM " jack and the

red test lead to the " 10A " jack.

2. Set the range switch to position.

3. Turn off power to the circuit which you want to measure.

Discharge all capacitors.

4. Break the circuit path to be measured, connect the test

leads in series with the circuit.

5. Turn on power to the circuit, then read the display. The

polarity of the red test lead connection will be indicated as

well.

Note:

1. Never attempt to perform an in-circuit current

measurement when the open circuit potential to earth is

more than 35V.

Figure 3

Measuring Resistance

1. Connect the black test lead to the " COM " jack and the

red test lead to the " INPUT " jack. ( Note:The polarity of

the red lead is positive " + ". )

2. Set the range switch to desired range.

3. Connect the test leads across the load to be measured.

4. Read the reading on the display.

Note :

1. For measurements > 1M , the meter may take a few

R

15

2. Don't use the meter to measure a current higher than 10A.

3. Never place the probes in parallel with a circuit or

component when the test leads are plugged into the

current terminals.

Figure 4

1. Connect the black test lead to the " COM " jack and the

red test lead to the " INPUT " jack. ( Note:The polarity of

the red lead is positive " + ". )

2. Set the range switch to position.

Continuity Test

16

seconds to stabilize reading. This is normal for high

resistance measurements.

2. When the input is not connected, i.e. at open circuit, "1"

will be displayed as overrange indication.

3. To avoid electric shock to you or damage to the meter,

disconnect circuit power and discharge all capacitors

before measuring resistance.

Figure 5

1. Connect the black test lead to the " COM " jack and the

red test lead to the " INPUT " jack.

2. Set the range switch to 20kHz position.

Measuring Frequency

17

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

4. If the resistance is less than about 30 , the built-in buzzer

will sound.

Note:

To avoid electric shock to you or damage to the meter,

disconnect circuit power and discharge all capacitors before

test.

Figure 6

Diode Test

1. Connect the black test lead to the " COM " jack and the

red test lead to the " INPUT " jack. ( Note:The polarity of

the red lead is positive " + ". )

18

3. Connect the test leads across the source or load to be

measured.

4. Read the reading on the display.

Note:

The input voltage should be between 1Vp and 35Vp. If the

voltage exceeds 35Vp, the accuracy of reading may be out

of the specified accuracy range.

Figure 7

Measuring Duty Cycle

1. Connect the black test lead to the " COM " jack and the

red test lead to the " INPUT " jack.

2. Set the range switch to Duty position.

3. Connect the red test lead to the positive terminal of the

signal source be measured and the black test lead to the

19

2. Set the range switch to position.

3. Connect the red test lead to the anode of the diode to be

tested and the black test lead to the cathode of the diode.

4. The display shows the approximate forward voltage drop

of the diode. If the connection is reversed, "1" will be

shown on the display.

Figure 8

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allsun allsun Automotive Multimeter DMM DC Volt Ohm Temp Frequency Diode & Continuity Tester Automotive Diagnosis Tester Test RPM Dwell Angle User manual

allsun allsun Automotive Multimeter DMM DC Volt Ohm Temp Frequency Diode & Continuity Tester Automotive Diagnosis Tester Test RPM Dwell Angle User manual

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