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APPA 93N Instruction Manual
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APPA 93N Instruction Manual

Digital multimeter
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DIGITAL MULTIMETER

INSTRUCTION MANUAL
APPA 93N

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Summary of Contents for APPA 93N

  • Page 1 DIGITAL MULTIMETER   INSTRUCTION MANUAL APPA 93N...
  • Page 2  WARNING THE SERVICING INSTRUCTIONS DESCRIBED WITHIN THIS MANUAL 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. TO AVOID ELECTRIC SHOCK, DISCONNECT MEASURING TERMINALS BEFORE OPENING ENCLOSURE.
  • Page 3 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. 1-2 Meter Safety Terms marked on Equipment ...
  • Page 4 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.
  • Page 5 5. µA mA Input Terminal — Positive input connector for current measurements (up to 200mA). 6. 20A Input Terminal — Positive input connector for current measurements (up to 20A). 7. Capacitor Test Jacks — Used for capacitance measurements. 8. AC/DC Switch — Select AC or DC for voltage and current measurements.
  • Page 6 Figure 1...

  • Page 7: Specifications

    SPECIFICATIONS 2-1 General Specifications Display : 3-1/2 digit Liquid Crystal Display (LCD) with a maximum reading of 1999. Polarity Indication : Automatic, positive implied, negative indicated. Overrange Indication : "1" or "-1".  Low Battery Indication : " " is displayed when the battery voltage drops below specified operating voltage. Measuring Rate : 2.5 times per second, nominal.
  • Page 8 Dimensions (WxHxD) : 84mm x 175mm x 31mm, without holster 95mm x 192mm x 50mm, with holster. Weight (including battery) : 340 gms without holster 550 gms with holster. Accessories : Protective Holster, battery (installed) and instruction manual. 2-2 Environmental Conditions Indoor Use Maximum Altitude : 2000 meters.
  • Page 9 2-3 Electrical Specifications Accuracy is ± (% reading + number of digits) at 23°C ± 5°C, less than 75% R.H. (1) DC Volts Over voltage Range Resolution Accuracy protection 200mV 100 µV ±(0.5%rdg + 1dgt) 600V rms 10mV 200V 100mV 600V Input Impedance : 10MΩ.
  • Page 10 (2) AC Volts Over voltage Range Resolution Accuracy protection 200mV 100 µV ±(1.3%rdg + 4dgt) 600V rms 10mV 40Hz to 500Hz 200V 100mV 600V AC Conversion Type : Average Sensing rms indication. Input Impedance : 10MΩ// less than 100pF...
  • Page 11 (3) DC Current Range Resolution Accuracy Voltage Burden 200 µA 0.1 µA 1 µA 600mV max. ±(1.0%rdg + 1dgt) 20mA 10 µA 200mA 100 µA 900mV max. 10mA ±(2.0%rdg + 3dgt) Overload Protection : 1A (500V) fast blow fuse for µAmA input. 16A(500V) fast blow fuse for 20A input.
  • Page 12 (4) AC Current Range Resolution Accuracy Voltage Burden 200 µA 0.1 µA 1 µA 600mV rms max. ±(1.5%rdg + 3dgt) 40Hz — 500Hz 20mA 10 µA 200mA 100 µA 900mV rms max. ±(2.5%rdg + 3dgt) 10mA 40Hz — 500Hz AC Conversion Type : Average sensing rms indication. Overload Protection : 1A (500V) fast blow fuse for µAmA input.
  • Page 13 (5) Resistance Max.Test Max.Open Range Resolution Accuracy Current Circuit Voltage 200Ω 0.1Ω ±(0.8%rdg + 4dgt) 2.5mA 3.2V 2KΩ 1Ω 200 µA 20KΩ 10Ω 40 µA ±(0.8%rdg + 1dgt) 200KΩ 100Ω 4 µA 0.5V 2MΩ 1KΩ 400nA 20MΩ 10KΩ ±(1.5%rdg + 5dgt) 40nA Overload Protection : 600V rms.
  • Page 14 (6) Diode Check Max.Open Max.Test Range Resolution Accuracy Circuit volt- Current   ±(1.5% rdg + 5 dgt) * 1.5mA 3.2V * For 0.4V ~ 0.9V Overload Protection : 600V rms. Continuity : Built-in buzzer sound when resistance is less than 50Ω. (7) Auto Power Off The meter will automatically shut itself off after approximately 30 minutes after power on.
  • Page 15 (8) Capacitance Range Resolution Accuracy Test Frequency 20nF 10pF 200nF 100pF ±(2.0%rdg + 4dgt) 40Hz 2 µF 20 µF 10nF 200 µF 100nF...
  • Page 16 (9) Frequency Counter Accuracy Min. Input Overload Range Resolution Sensitivity 5Vrms Max Frequency Protection 2K Hz 1 Hz 20 Hz 200m Vrms 20K Hz 10 Hz ±(1.0%rdg + 3dgt) 200 Hz 600V rms min. 200K Hz 100 Hz 20K Hz...
  • Page 17 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.
  • Page 18 3-2 Voltage Measurements 1. Connect the red test lead to the “VΩHz” input terminal and other (black) test lead to the “COM” terminal. 1. Set the rotary function to the required position. 2. Set the DC/AC switch to the required position. 3.
  • Page 19 3-3 Current Measurements 1. Set the rotary switch to the required position. 2. Set the DC/AC switch to the required position. 3. Connect black test lead to "COM" terminal. 4. Connect red test lead to "µA mA" terminal for measurements up to 200mA. For measuring current between 200mA and 20A, connect red test lead to "20A"...
  • Page 20 3-5 Diode Check 1. Set the rotary switch to ";" position. 2. Connect the black test lead to the "COM" terminal and the red test lead to "VΩHz" input terminal. 3. Connect test leads to the diode. Normally the forward voltage drop of a good silicon diode is between .500V to .900V.
  • Page 21 3-7 Capacitance Measurement 1. Set the rotary switch to the required position. 2. Observe polarity when measuring polarized capacitors. 3. The tested capacitor should be discharged before the testing procedure. Never apply voltage to the “Capacitor Test jacks” Serious damage may result. 4.

  • Page 22: Maintenance

    MAINTENANCE  WARNING : TO AVOID ELECTRICAL SHOCK REMOVE TEST LEADS BEFORE OPENING THE COVER. 4-1 General Maintenance To keep the instrument clean, wipe the case with a damp cloth and detergent, do not use abrasives or solvents. Any adjustment, maintenance and repair of the opened instrument with voltage present 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.
  • Page 23 4-2 Battery Installation or Replacement The meter is powered by a single 9V battery. Refer to Figure 2A and use the following procedure to replace the battery: 1. Disconnect the test leads and switch the meter off. Remove the test leads from the front terminals. 2.
  • Page 24 4-3 Fuse Replacement Refer to Figure 2B and use the following procedure to examine or replace the meter's fuses: 1. Perform steps 1 through 4 of the battery replacement procedure. 2. Lift the circuit board from the case top. Do not remove the screws from the circuit board. 3.
  • Page 25 Battery and Fuse Replacement Case Top Case Bottom Fuse 2 9V Battery Case Top Battery Connector Fuse 1 Case Bottom Figure 2A Figure 2B...
  • Page 26 HOW TO USE THE PROBE HOLDER Clip one probe on the holster for Wrap the leads around the one handed meter operation. holster to store the test probes.
  • Page 27 HOW TO USE THE TILT STAND AND HOLSTER Swing the stand out for easier meter reading. Swing the upper holder out and hook it over a door.
  • Page 28 HOW TO USE THE TILT STAND AND HOLSTER Meter in holster face down. Hang on a nail at the workbench...
  • Page 29 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 : 886-2-29178820 Fax : 886-2-29170848 E-MAIL:info @appatech.com http://www.appatech.com Printed In Taiwan Copright  1997, APPA Tech., Corp. All rights reserved.