APPA 67 User manual

DIGITAL MULTIMETER

INSTRUCTION MANUAL
APPA 67

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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. Operators Manual.
4. Holster.
1-2 Meter Safety
Terms as Marked on Equipment
ATTENTION —Refer to Manual.
DOUBLE INSULATION —Protection Class II.
DANGER —Risk of electric shock.

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Symbols in this Manual
This symbol indicates where cautionary or other information is found in the manual.
Fuse
Battery
1-3 Front Panel
Refer to Figure 1 and the following numbered steps to familiarize yourself with the meter's front panel controls and
connectors.
1. Digital Display —The digital display has a 3200 counts LCD readout with 65 segments analog bar graph, auto
polarity, decimal point, , , DC, AC, , RANGE, and Unit annunciators.
2. Rotary Switch —Selects the desired function and range.
3. COM Input Terminal —Ground input connector.
4. VΩInput Terminal —Positive input connector for Volts, Ohms and Diode measurements.

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5. µA mA Input Terminal —Positive input connector for current and measurements. (up to 300mA).
6. A Input Terminal —Positive input connector for current measurements, up to 10A.
7. Function Switch (Blue) —Press the switch to measure AC voltage or DC voltage in the Voltage mode or to
measure AC current or DC current in the current mode, or to measure continuity or diode check in ;/ mode.
8. Reset Switch - The meter can be turned back on by pushing "RESET" key switch.
9. Hold Switch - This switch is used to hold measured values for all functions. When pressed the " " annunciator
is displayed. Conversions are made but the display is not updated.
10. Range Switch (Manual Range) –The "Range" switch is pressed to select manual ranging and to change
ranges. When the "Range" switch is pressed once, the "RANGE" annunciator on the LCD disappears. Press the
"Range" switch to select the appropriate range to be used. Press the "Range" switch and hold for 2 seconds to
return to Auto-ranging.

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Figure 1

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SPECIFICATIONS
2-1 General Specifications
Display : The Liquid Crystal Display (LCD) has a maximum reading of 3200, and 65 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 : Approximately 10 minutes unless the measured value changes within this time.
Temperature Coefficient : 0.15 x (Specified accuracy) / °C, < 18°C or > 28°C.
Power Requirements : IEC LR03, AM4 or AAA size 1.5V x 2.
Battery Life : Alkaline 900 hours.
Dimensions (HxWxD) : 66mm x 155mm x 34mm, without holster.
85mm x 165mm x 40mm, with holster.
Weight (including battery) : 250 gms, without holster.
370 gms, with holster.
Supplied Accessories: Test leads, battery (installed), operator's manual and holster.

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2-2 Environmental Conditions
For indoor use.
Maximum Altitude : 2000m.
Pollution Degree : 2
Operating Ambient : 0°C to 50°C, 0 to 80% R.H.
Storage Temperature : -20°C to 60°C, 0 to 80% R.H. with battery removed from meter.
Installation Category : IEC 61010, 600V CAT II.
CAT Application field
ⅠThe circuits not connected to mains.
ⅡThe circuits directly connected to Low-voltage installation.
ⅢThe building installation.
ⅣThe source of the Low-voltage installation.

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2-3 Electrical Specifications
Accuracy is ± (% reading + number of digits) at 23C ± 5C less than 80% R.H.
(1) DC Volts
Range Resolution Accuracy Over voltage protection
300mV 100µV
±(0.7%reading + 2digits) 600Vd.c. or 600Va.c.rms
3V 1mV
30V 10mV
300V 100mV
600V 1V
Input Impedance : 10MΩ.

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(2) AC Volts
Range Accuracy Over voltage protectionResolution
3V ±(1.7%reading + 5digits)
600Vd.c. or 600Va.c.rms
1mV
30V
±(1.7%reading + 5digits)
40Hz to 400Hz
10mV
300V 100mV
600V 1V
* Frequency Response : 40Hz ~ 300Hz for 3V Range.
AC Conversion Type : Average Sensing rms indication.
Input Impedance : 10MΩ//less than 100PF.

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(3) DC Current
Range Resolution Accuracy Voltage Burden
300µA 0.1µA 200mV max
±(1.2%reading + 2digitst)
3mA 1µA 2V max
30mA 10µA 200mV max
300mA 0.1mA 2V max
20A 10mA ±(2.5%reading + 5digits) 2V max
* 20A Range : 30 seconds maximum above 10A input.
Overload Protection : 1A/240V fast for µA/mA input.
13A/240V fast for A input.

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(4) AC Current
* Frequency Response : 40Hz ~ 500Hz.
* 20A Range : 30 seconds maximum above 10A input.
Overload Protection : 1A/240V fast for µA/mA input.
13A/240V fast for A input.
AC Conversion Type : Average sensing rms indication.
Range Resolution Accuracy Voltage Burden
300µA 0.1µA 200mV max
±(1.7%reading + 4digits)
3mA 1µA 2V max
30mA 10µA 200mV max
300mA 0.1mA ±(2.0%reading + 4digits) 2V max
20A 10mA ±(2.9%reading + 7digits) 2V max

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(5) Resistance
Range Resolution Accuracy Voltage Burden
300Ω0.1Ω±(1.2%reading + 4digits)
600Vd.c. or 600Va.c. rms
3KΩ1Ω
±(0.9%reading + 2digits)
30KΩ10Ω
300KΩ100Ω
3MΩ1KΩ±(1.2%reading + 3digits)
* 30MΩ10KΩ±(2.5%reading + 5digits)
* Open Circuit Voltage : 1.3V approx.

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(6) Diode Check and Continuity
Range Resolution Accuracy Max. Test Current Max. Open
Circuit Voltage
1mV ±(1.5%reading + 5digits) 1.5mA 3.3V
*For 0.4V ~ 0.8V.
Overload Protection: 600V DC/AC rms max.
Continuity: Built-in sounder will operate when resistance is less than 30Ω.
(7) Auto Power Off
The meter will automatically shut itself off approximately 10 minutes after power on unless the value being measured
changes within this time. The meter can be turned back on by pressing "Reset" key switch.
(8) Beep Guard
The beeper will sound if the test lead is connected to the µA/mA/(A) input terminal, but the rotary function selector is
not in the µA/mA/(A) positions.

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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 must 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, warm up for at least 30 seconds.
2. When the rotary function selector is changed during measurement, be sure to do so only after removing the test
leads from the equipment.
3. If the equipment is used near noise generating equipment, be aware that the display may become unstable or indicate
large errors.
4. Maximum rated voltage to earth for voltage and current measurements terminals is 600V AC/DC CAT II.

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3-2 Voltage Measurements
1. Connect the red test lead to the "VΩ" input terminal and the black test lead to the "COM" terminal.
2. Set the rotary function switch to the ACV or DCV position.
3. Connect the test leads to the device to be measured.
4. When the input is over-ranged the most significant digit of LCD display flashes and the three last significant digits are
set to zero.
5. " Warning : Do not exceed 600Vd.c. or 600Va.c. limits stated in the specification".

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WARNING
TO AVOID ELECTRIC SHOCK HAZARD, OR DAMAGE TO THE METER, DO NOT ATTEMPT TO MEASURE
VOLTAGES THAT MIGHT EXCEED 600 VOLTS d.c. OR 600 VOLTS a.c.. DO NOT APPLY MORE THAN 600V
d.c. OR 600V a.c. RMS BETWEEN THE COMMON INPUT TERMINAL AND EARTH GROUND.
3-3 Resistance Measurement
1. Connect the red test lead to the "VΩ" terminal and the black test lead to the "COM" terminal.
2. Set the rotary function switch to the "Ω" position to measure resistance.
3. For correct reading, ensure that there is no voltage present across the device being tested.
4. Connect the test leads across the resistor to be measured. To ensure the best accuracy in measurement of low
resistance, short the test leads before measurement and note the test lead resistance. It is necessary to subtract the
resistance of the test leads from the displayed reading.

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3-4 Continuity Check by Sounder
1. Connect the red test lead to the "VΩ" terminal and the black test lead to the "COM" terminal.
2. Set the rotary function switch to "" position.
3. Connect the test leads to the circuit to be measured. The sounder will operate if the resistance of the circuit measured is
lower than 30Ω.
4. The sounder may operate when the instrument is first switched on in the continuity mode and all the LCD segments are
displayed.
3-5 Diode Check
1. Set the rotary switch to the "" position.
2. Connect the black test lead to the "COM" terminal and the red lead to the "VΩ" input terminal.
3. Connect the test leads to the diode. Normally the forward drop of good silicon diode is shown between 0.4V to
0.9V. If the diode under test is defective, "000" (short circuit) or "OL" (non-conductance) is displayed.
Reverse Check of Diode : If the diode under test is good "1" is displayed. If the diode under test is defective "000"
or other values will be displayed.

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3-6 Current Measurement
1. Connect the red test lead to "µA/mA" terminal and the black test lead to "COM" terminal or use the "A" and "COM"
terminal in the "A" range.
2. Set the function selector rotary switch to "µA" or "mA" or "A".
3. Measurement of AC current can be performed by pressing the "AC/DC" switch.
4. Connect the test leads to the circuit to be measured.

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MAINTENANCE
 WARNING : TO AVOID ELECTRICAL SHOCK REMOVE TEST LEAD BEFORE OPENING THE COVER.
4-1 General Maintenance
To keep the instrument clean, wipe the case with a dry cloth and detergent, do not use abrasives or solvents.
Any adjustment, maintenance and repair of the opened instrument under voltage shall be avoided as far as possible
and, if inevitable, shall be carried out by a skilled person who is aware of the hazard involved.
Whenever it is likely that the protection has been impaired, the instrument shall be made inoperative and be secured
against any unintended operation.
The protection is likely to be impaired if, for example, the apparatus:
—shows visible damage,
—fails to perform the intended measurements,
—has been subjected to prolonged storage under unfavorable conditions,
—has been subjected to severe transport stresses.

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4-2 BATTERY INSTALLATION OR REPLACEMENT
The meter is powered by two 1.5V batteries. Refer to Figure 2A and use the following procedure to replace the
batteries:
1. Disconnect the test leads and turn the meter off. Remove the test leads from the front terminals.
2. Remove the holster.
3. Position the meter face down. Remove the screw from the case bottom.
4. Lift the end of the case bottom until it gently unsnaps from the case top at the end nearest the LCD.
5. Lift the battery from case top, and carefully disconnect the batteries from battery connector leads.
6. Snap the battery connector leads to the terminals of the new batteries and reinsert the batteries into the case top.
Make sure that the battery leads to not become pinched between the case bottom and case top.
7. Replace the case bottom. Reinstall the screw and replace the holster.