DIGITAL MULTIMETER

6

INSTRUCTION MANUAL

APPA 99II

34

#

WARNING

THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY.

TO AVOID ELECTRIC SHOCK, DO NOT PERFORM ANY SERVICING OTHER THAN THAT

CONTAINED IN THE OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO.

1

INTRODUCTION

1-1 Unpacking and Inspection

Upon removing your new Digital Multimeter from its packing, you should have the following items:

1. Digital Multimeter.

2. Test lead set (one black, one red).

3. Instruction manual.

4. Protective holster.

5. K Type Temperature Sensor.

6. Sensor Adaptor.

2

1-2 Meter Safety

Terms as Marked on Equipment.

#

ATTENTION — Refer to manual.

1

DOUBLE INSULATION — Protection Class Ⅱ .

"

DANGER — Risk of electric shock.

Symbols in this Manual.

#

This symbol indicates where cautionary or other information is found in the manual.

FUSE

Battery

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1-3 Front Panel

Refer to Figure 1 and to the following numbered steps to familiarize yourself with the meter’s front panel controls

And connectors.

1. Digital Display — The digital display has 4000 counts LCD readout with 82 segments analog bar graph, auto

polarity, decimal point, “ “ AC, DC RANGE, APO REL MAX, MIN, PMAX, PMIN and

unit annunciators.

2. Rotary Switch — Select the Function and Range desired.

3. COM Input Terminal — Ground input connector.

4. ºC ℉ V Ω Hz Input Terminal — Positive input connector for Volts, Ohms Capacitance and Temperature Frequency.

5. mA Input Terminal — Positive input connector for Amp measurements (up to 400mA).

6. A Input Terminal — Positive input connector for Amp measurements (up to 10A).

7. Range Switch, (Manual Range) — Press the “Range” switch to select manual ranging. The “RANGE” annunciator

will be displayed. Pressing the “Range” switch permits selection of the

appropriate measuring range. To return to Autoranging press and hold the

“Range” switch for 2 seconds.

4

8. REL △ / (PMIN/MAX) switch — A. In voltage and current modes, pressing “REL △ ” performs maximum and

minimum PEAK hold function. Pressing “REL △ ” toggles between PMIN

and PMAX measured values and the PMIN or PMAX annunciators are

displayed. To calibrate this function press and hold “REL △ ” until the “CAL”

annunciator is displayed, then short the test leads until the display reads

zero. Press and hold the “REL △ ” switch to exit this function.

B. In all other modes pressing the “REL △ ” switch precuts comparison

between two measured values. When taking the first measurement press

the “REL △ ” switch to store the reading, the “REL” annunciator will be dis-

played and the reading is zeroed. When taking the second measurement

the display will show the difference between measurement 2 and measure-

ment 1 (will be negative if measurement 1 is large than measurement 2 ).

Pressing the “REL △ ” switch again causes the display to show measure-

ment 2, and the “REL” annunciator will flash. To exit this mode press and

hold the “REL △ ” switch for 2 seconds.

9. MIN/MAX switch — This switch is used to display “MAX” and “MIN” values of measurement, press ≧ 2 seconds to

quit. In this mode, when “MAXMIN” is blinking the reading is of measuring signal.

5

10. Hold Switch — This switch is used to hold measured value for all functions, the “ “ “RANGE” annunciator

are displayed. Conversions are made but the numeric display is not updated.

This switch can be invoked to “MIN/MAX” mode or “”PMIN/PMAX” mode.

11. Light switch — Press this switch to turn on or turn off the back-light.

12. Blue Switch — Press the switch to measure AC Voltage / Current or DC Voltage / Current in the voltage /

Current mode or to measure Resistance or continuity or diode in Ω / /

:

mode or to measure

Frequency or RPM in Hz/RPM mode.

6

Figure 1

7

SPECIFICATIONS

2-1 General Specifications

Display : The Liquid Crystal Display (LCD) with a maximum reading of 4000 and 82 segments bar graph.

Polarity Indication : Automatic, positive implied, negative indicated.

Overrange Indication : “OL” or “-OL”.

Low Battery Indication : “ “ is displayed when the battery voltage drops below operating voltage.

Sampling : 2 times/sec for digit. 12 times/sec for analog bargraph.

Auto Power Off : Approx 30 minutes.

Operating Ambient : 0ºC ~ 30ºC ( ≦ 80%R.H), 30ºC ~ 40ºC ( ≦ 75%R.H),

40ºC ~ 50ºC ( ≦ 45%R.H).

Storage Temperature : -20ºC to 60ºC , 0 to 80% R.H. when battery removed from meter.

Temperature Coefficient : 0.15 x (specified accuracy) / ºC , <18ºC or > 28ºC .

Power Requirements : Standard 9V battery NEDA 1604, IEC6F22, JIS006P.

Battery Life : Alkaline 300 hours.

8

Dimensions (W x H x D) : 88mm x 180mm x 33.5mm , without holster.

94mm x 188mm x 40mm , with holster.

Accessories : Protective Holster , battery (installed), instruction manual, test lead, K-type Temperature Sensor

and Sensor Adaptor.

2-2 Environmental Conditions

Indoor use.

Maximum Altitude : 2000 Meter.

Installation Category : IEC 1010, 1000V Cat.

Ⅱ , 600V Cat.

Ⅲ .

Pollution Degree : 2

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2-3 Electrical Specifications

Accuracy is ± 5ºC , less than 80% R.H.

(1) DC Volts

Range

400mV

4V

40V

400V

1000V

Resolution

100µV

1mV

10mV

100mV

1V

±

Input Impedance : 10M Ω . (over 1000M Ω in 400mV range).

Accuracy

10

Over voltage protection

DC 1000V

(2) AC Volts

Range

400mV

4V

40V

400V

750V

Resolution

0.1mV

1mV

10mV

100mV

1V

±

±

Accuracy

± 1

40Hz to 1KHz

3

1 2

Over voltage protection

750V rms

Input Impedance : 10M Ω // less than 100pF.

1. ±

2. Frequency Response : 40Hz ~ 1KHz ; ±

3. Frequency Response : 50Hz ~ 60Hz.

AC Conversion Type : AC conversions are ac-coupled, true rms responding, calibrated to the rms value sine

wave input.

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Crest Factor : +1.5% addition error for C.F. from 1.4 to 3 where C.F. = Peak

+3.0% addition error for C.F. from 3 to 4 RMS

(3) DC Current

Range Resolution Accuracy Voltage Burden

40mA

400mA

10A

10µA

0.1mA

10mA

± 200mV max

± (0.7% reading+ 2 digits) 2V max

± (1.0% reading + 3digits) 2V max

Overload Protection : 1A (500V) fast blow fuse for mA input.

10A (500V) fast blow fuse for A input.

Both 10KA breaking capacity @ 440 Vac , size 32 x 6.3mm.

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(4) AC Current

Range

40mA

400mA

10A

Resolution

10µA

0.1mA

10mA

Accuracy Voltage Burden

± (2.0% reading + 5 digits)

200mV max

2V max

± (2.5% reading + 5 digits) 2V max

Frequency Response : 40Hz ~ 1KHz.

Overload Protection : 1A (500V) fast blow fuse for mA input.

10A (500V) fast blow fuse for A input.

Both 10KA breaking capacity @ 440 Vac , size 32 x 6.3mm.

AC Conversion Type : AC conversions are ac-coupled true rms responding, calibrated to the rms value sine

wave input.

Crest Factor : +1.5% addition error for C.F. from 1.4 to 3 where C.F. = Peak

+3.0% addition error for C.F. from 3 to 4 RMS

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(5) Resistance

Range

400 Ω

4K Ω

40K Ω

400K Ω

4M Ω

40M Ω

Resolution

0.1

Ω

1 Ω

10 Ω

100 Ω

1K Ω

10K Ω

Open circuit Voltage : -1.3V approx.

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Accuracy

Overload

Protection

600V rms

(6) Diode Check and Continuity

Range Resolution Accuracy

Max. Test

Current

1mV 1.5mA

* For 0.4V ~ 0.8V.

Overload Protection : 600V rms max.

Continuity : Internal sounder will activate when resistance is less than 30 Ω approximately.

Max. Open

Circuit

Voltage

3V

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(7) Frequency / RPM

Range Resolution

4.0KHz/40KRPM 1Hz/30RPM

40KHz/400KRPM 10Hz/300RPM

400KHz/4MRPM 100Hz/3KRPM

4MHz/40MRPM 1KHz/30KRPM

40MHz/400MRPM 10KHz/300KRPM

Sensitivity

100mV rms

250mV rms

1V rms

Accuracy

Frequency :

0.01% ±

RPM :

0.01% ±

Overload

Protection

600V rms

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(8) Capacitance

Range

4nF

40nF

400nF

4µF

40µF

400µF

* 4mF

* 40mF

Resolution

1pF

10pF

100pF

1nF

10nF

100nF

1µF

10µF

±

* ±

(3%reading + 10digits)

(2%reading + 8digits)

** ±

Accuracy

(5%reading + 20digits)

* 4mF and 40mF ranges may have rolling within accuracy.

** specify reading < half full scale of range.

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Overload Protection

600V rms

(9) Temperature (ºC)

Temperature

-20ºC ~ 0ºC

1ºC ~ 100ºC

101ºC ~ 500ºC

501ºC ~ 800ºC

Accuracy Overload Protection

600V rms

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(10) Temperature ( ℉ )

Temperature

-4 ℉ ~ 32 ℉

33 ℉ ~ 212 ℉

213 ℉ ~ 932 ℉

933 ℉ ~ 1472 ℉

Accuracy

± ℉ )

± ℉ )

± ℉ )

± ℉ )

Overload Protection

600V rms

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(11) PEAK HOLD

Function Range

400mV

4V

DCV 40V

400V

ACV

1000V

400mV

4V

40V

400V

750V

±

±

Accuracy

Unspecified

Unspecified

(1.5% reading +60 digits)

Function

DCI

ACI

Range

40mA

400mA

10A

40mA

400mA

10A

20

Accuracy

Note : 1. With zero calibrated before measurement.

2* 4V range specifies readings above 10% of full scale of range.

3. Amp ranges specify reading <90% of full scale of range.

4. In the noise generating field, may affect intervals.

(12) Auto Power Off (APO)

The APO annunciator on the LCD panel indicates that the meter is working in the Auto Power Off mode. If the

meter idles for more than 30 minutes, the meter automatically turns the power off. When this happens, the

state (non-logic measurement) of the meter is stored. The meter can be turned back on by pushing any switch

except back light switch or changing the rotary switch. If the meter is Re-Powered by pushing any switch,

the LCD displays the stored value. Pressing the Hold switch disables the hold state. The meter will produce a

periodic alarm 15 seconds before automatically turning power off , any key press or rotary change will reset

the Auto-Power-Off delay of 30 minutes.

(13) Disable Auto Power Off

In order to disable Auto Power Off function, power up the meter whilst pressing any of the function switches

other than the “Hold” or BLUE switches.

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OPERATION

This instrument has been designed and tested in accordance with IEC Publication 1010, Safety Requirements for

Electronic Measuring Apparatus and has been supplied in a safe condition. This instruction manual contains some

Information and warnings which have to be followed by the user to ensure safe operation and to retain the instrument in safe condition.

3-1 Preparation and Caution before Measurement

1. Before measurement, switch the meter on and allow it to warm up for at least 60 seconds.

2. When the rotary function selector is changed during measurement, be sure do so only after removing the test

leads from the equipment.

3. If the equipment is used near noise generating equipment, be aware that may become unstable or indicate

large errors.

4.

#

Maximum rated voltage to earth for voltage and current measurements terminals is 1000V CAT.

Ⅱ , 600V

CAT. Ⅲ .

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3-2 Voltage Measurements

1. Connect the red test lead to the “ºC ℉ V Ω Hz” input terminal and the other (black) test lead to the “COM” terminal.

2. Set the rotary function to the V position.

3. Measurement of AC voltage can be performed by pushing the “BLUE” key switch.

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

#

WARNING

TO AVOID ELECTRICAL SHOCK, HAZARD OR DAMAGE TO METER, DO NOT A ATTEMPT TO

MEASURE VOLTAGE THAT MIGHT EXCEED 1000V ms. DO NOT APPLY MORE THAN 1000V rms

BETWEEN THE COMMON INPUT TERMINAL AND EARTH GROUND.

NOTICE

UNSTABLE DISPLAY MAY OCCUR ESPECIALLY AT 400mV RANGE, EVEN THOUGH YOU DON’T

PUT TESTED LEADS INTO INPUT TERMINALS. IN THIS CASE, IF AN ERRONEOUS READING IS

SUSPECTED, SHORT THE “ ℃ ℉ V Ω Hz” TERMINAL AND THE “COM” TERMINAL, AND MAKE SURE

THE DISPLAY READS ZERO.

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3-3 Current Measurement

1. Connect the red test lead to “mA” terminal and the other (black) test lead to “COM” terminal, or use the “A” and

“COM” terminal in the 10A range.

2. Set function selector rotary switch to “ mA ” or “ A ” .

3. Measurement of AC current can be performed by pushing the “BLUE” switch.

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

3-4 Resistance Measurement

1. Connect the red test lead to the “ ºC ℉ V Ω Hz” terminal and the other (black) test lead to the “COM” terminal.

2. Set the rotary function selector to “ Ω :

” position to measure the resistance.

3. For correct reading, ensure that the device being tested contains no voltage.

4. Connect the test leads across the circuit to be measured. In order to ensure the bes t accuracy in measure-

ment of low resistance, to except the resistance of test leads by REL function, short the test leads and stored

it by pressing REL key.

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3-5 Continuity Check by Internal Sounder

1. Connect the red test lead to the “ ºC ℉ V Ω Hz” terminal and the other (black) test lead to the “COM” terminal.

2. Set the rotary function selector to “ Ω :

” position.

3. Connect the test leads to the circuit to be measured. The internal sounder will operate if the resistance of the

circuit measured is lower than 30 Ω approximately.

3-6 Diode Check

1. Set the rotary switch at “ Ω :

” position.

2. Connect black test lead to “COM” terminal and red lead to “ ºC ℉ V Ω Hz ” input terminal.

3. Connect test leads to the diode normally the forward voltage drop of good silicon diode is shown between

0. 400V and 0.900V. If the diode under test is defective. “0.000” (short circuit) or “OL” (non-conductance) is

displayed. During check, the diode under test is defective, if “0.000” or other values are displayed.

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3-7 Hz / RPM Measurement

1. Connect the red test lead to the “ ºC ℉ V Ω Hz ” terminal and the other (black) test lead to the “COM” terminal.

2. Set the rotary function selector to “Hz RPM” position to measure the frequency or RPM.

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

3-8 Capacitance Measurement

1. Connect the red test lead to the “ ºC ℉ V Ω Hz” terminal and the other (black) test lead to the “COM” terminal.

2. Set the rotary function selector to “ ” position to measure capacitance.

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

4. In order to ensure the best accuracy in measurement of low capacitance, to except the stray capacitance of test

leads by test leads open with pressing REL key to store.

3-9 Temperature

1. Connect the “ ＋ “ of ADAPTOR to the “ ºC ℉ V Ω Hz ” terminal and “ —“ to the “COM” terminal .

2. Combine the sensor with the adaptor.

3. Set the rotary function selector to “ºC” or “ ℉ ” position to measure temperature value.

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MAINTENANCE

#

WARNING :

TO AVOID ELECTRICAL SHOCK REMOVE TEST LEAD BEFORE OPENING THE COVER.

4-1 General Maintenance

1. Repairs or servicing not covered in this manual should only be performed by qualified personal.

2. Periodically wipe the case with a dry cloth and detergent do not use abrasives or solvents.

4-2 Battery Installation or Replacement

The meter is powered by 9V battery. Refer to Figure 2 and use the following procedure to replace the battery:

1. Disconnect the test leads and turn the meter off. Remove the test leads from the front terminals.

2. Position the meter face down. Remove the screw from the battery cover.

3. Lift the end of the battery cover until it gently unsnaps from the case bottom.

4. Lift the battery from the battery compartment and carefully disconnect the battery connector leads.

5. Snap the battery connector leads to the terminals of a new battery and reinsert the battery into the battery

compartment.

6. Replace the battery cover. Make sure that the battery leads do not become pinched between the case bottom

and case top.

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Battery Cover (ii)

9V Battery

Screw (i)

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Figure 2

4-3 Fuse Replacement

Refer to Figure 3 and the following procedure to examine or replace the meter’s fuse:

1. Perform steps 1 though 3 of the battery replacement procedure.

2. Remove the two screws from the case bottom and lift the case bottom until it gently unsnaps from the case top.

3. Remove the defective fuse by gently prying one end of the fuse loose and sliding the fuse out of the fuse holder.

4. Install a new fuse of same size and rating. Make sure the new fuse is centered in the fuse holder.

5. Replace the case top and case bottom and battery cover bottom. Make sure that the battery leads do not be

come pinched between the case halves. Reinstall the three screws.

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Bottom Case

Top Case

Figure 3

Rapid Fuse 10A (500V),

Radid Fuse 16A (500V),

Radid Fuse 1A (500V),

10KA capacity @ 440 Vac

30

31

HOW TO USE THE TILT STAND AND HOLSTER

Swing the stand out for easier meter reading.

32

Swing the upper holder out and hook it over a door.

HOW TO USE THE TILT STAND AND HOLSTER

Meter in holster face down.

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Hang on nail at workbench.

APPA TECHNOLOGY CORP.

9F.119-1 Pao-Zong Rd., Shin-Tien,

Taipai, 23115, Taiwan, R.O.C.

P.O.Box. 12-24 Shin-Tien, Taiwan.

Tel : 886-2-9178820 Fax : 886-2-9170848 e-mail:info @appatech.com http://www.appatech.com

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Printed In Taiwan

2003, APPA Tech., Corp. All rights reserved.