User Manual APPA 71/72/73 33
Warning Caution .......... .......... .......... ........ ......... .......... .......... ........ ......... Safety Alert Symbol : READ and UNDERSTAND all safety alert symbols : in this manual. Failure to read and understand safety instructions can result in INJURY or DEATH Limited Warranty This meter is warranted to the original purchaser against defects in material and workmanship for 1 year from the date of purchase.
Table of Contents Title Page Safety ……………………………………………………………. 03 03 ” Warning” and “ Caution” Alert Symbol Statements …… Warning and Cautions …………………………………………. 03 Symbols as Marked on The Meter …………………………… 05 Symbols and Terms in The Manual ………………………….. 06 Safety Compliance And Certification ……………………… 07 Safety Compliance ……………………………………………… 07 Safety Certification ……………………………………………… 07 Introduction …………………………………………………….. 08 Unpacking and Inspection ……………………………………..
Safety Safety " Warning" and " Caution" Alert Symbol Statement : Warning" Alert Symbol A " Warning" Statement identifies hazardous conditions and actions that could cause BODILY HARM or DEATH. " Caution" Alert Symbol A " Caution" Statement: identifies conditions and actions that could DAMAGE the Meter or the equipment under test. " Warnings" and " Cautions" : Warnings ․ When using test leads or probes, keep your fingers behind the finger guards.
Safety ․ Use the Meter only as specified in this manual or the protection by the Meter might be impaired. ․ Always use proper terminals, switch position, and range for measurements. ․ Never attempt a voltage measurement with the test lead inserted into the A input terminal. ․ Verify the Meter’s operation by measuring a known voltage. If in doubt, have the Meter serviced. ․ Do not apply more than the rated voltage, as marked on Meter, between terminals or between any terminal and earth ground.
Safety Cautions ․ Disconnect the test leads from the test points before changing the position of the function rotary switch. ․ Never connect a source of voltage with the function rotary switch in Ω// A //Hz position. ․ Do not expose Meter to extremes in temperature or high humidity. ․ Never set the meter in A function to measure the voltage of a power supply circuit in equipment that could result in damage the meter and the equipment under test.
Safety Symbols and Terms in The Manual Symbols : : Caution, Risk of Danger. Warning : Identifies hazardous conditions and actions that could cause BODILY HARM or DEATH Caution : Identifies conditions and actions that could DAMAGE the meter or equipment under test. : Fuse. Terms : CAT Level : Over Voltage Category Level, indicates measurement can be performed at which measuring circuit level. The different level measuring circuit has different high transient stresses voltage.
Safety Compliance And Certification PER IEC1010 Pollution degree POLLUTION Addition of foreign matter, solid, liquid or gaseous (ionized gases), that may produce a reduction of dielectric strength or surface resistivity. POLLUTION degree For the purpose of evaluating spacing of this product, the following degrees of POLLUTION in the microenvironment are defined. POLLUTION DEGREE 1 No POLLUTION or only dry, non-conductive POLLUTION occurs. The POLLUTION has no influence.
Introduction Introduction 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, on red) 3. User Manual. 4. Protective holster. Environmental Conditions This product is safe at least under the following conditions: 1. Indoor Use 2. Altitude up to 2000 Meter 3. Operating Temperature and Relative Humidity : Non-condensing ≦10°C ,11°C ~ 30°C (≦80% R.H) 31°C ~ 40°C (≦75% R.
Making Basic Measurements The Meter Description Front Panel Illustration 1. 6000 counts LCD display. 2. Push-buttons for features. 3. Rotary switch to turn the Power On or Off and to select a function. 4. Input Terminal for A current function. (For 72 & 73 only) 5. Input Terminal for all functions EXCEPT current (A) functions. 6. Common (Ground reference) Input Terminal for all functions.
Making Basic Measurements Making Basic Measurements Preparation and Caution Before Measurement : Observe the rules of Warnings and Cautions. When connecting the test leads to the DUT (Device Under Test) connect the common (COM) test lead before connecting the live lead ; when removing the test leads removing the test live lead before removing the common test lead. The figures on the following pages show how to make basic measurements.
Making Basic Measurements Measuring Resistance Caution To avoid possible damage to the Meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before measuring resistance. Note – The Meter provides an open voltage ≦–1.5V to the circuit under test that causes the diode, transistor junction to conduct so it is better to disconnect the resistance from the circuit to get a correct measurement. The resistance of test leads is about 0.1Ω ~ 0.2Ω.
Making Basic Measurements Measuring DC µA, DC A, AC A Current (DCA, ACA for 72/73 only) Warning Never attempt an in–circuit measurement where the open–circuit potential to earth potential is greater than 500V for example a 3-phase system measurement, you may damage the Meter or be injured.
Making Basic Measurements Caution To avoid possible damage to the Meter or to the equipment under test, check the Meter’s fuses before measuring current. Use the proper terminals, function, and range for your measurement. Never place the probes across (in parallel with) any circuit or component when the leads are plugged into the current terminals. When measuring current, the Meter acts like an impedance such as 0.01Ω at AC/DC A (approximately 1.5KΩ at DC µA) in series with the circuit.
Making Basic Measurements Measuring Capacitance Caution To avoid possible damage to the meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before measuring capacitance. Use the DC voltage function to confirm that the capacitor discharged. Note– To improve the measurement accuracy of small value capacitor, record the reading with the test leads open then substract the residual capacitance of the Meter and leads from measurement.
Making Basic Measurements Testing for Diode and Continuity Diode : Good ! Good ! Bad ! Continuity : Caution For in-circuit test, turn circuit power off and discharge the high-voltage capacitors through an appropriate resistance load. Note – Use the diode test to check the semiconductor junction is good or bad. The Meter sends a current through the semiconductor junction to measure the voltage drop across the junction. A good junction drops between 0.4 V to 0.9 V.
Features Features Feature Description The Meter has Features : Display Hold – Freezes the display. Min Max Hold – Record the Max or Min reading of the display. Range – Selects the manual ranging mode. The default mode is Automatic Range. RS232 – An optical isolated interface output for data communication. (for 73 only) Backlight – LCD display backlight.
Using The Features Using The Features Manual Ranging and Auto Ranging Note - The Range button is pressed to select manual ranging and to change ranges. When the Range button is pressed once, the AUTO indicator turns off. Press Range button to select the appropriate range for measurement you want to make. Press Range button and hold for 1 second to return to Autorange.
Using The Features Note – Press HOLD button in MIN MAX mode to make the Meter stop updating the maximum and minimum value. When display Hold mode is nested in MIN MAX mode, the MIN MAX mode must be released before the display Hold. RS232 (For 73 only) Display Hold Note – Press the Hold button to toggle in and out of the display Hold mode. The MAX / MIN feature is unavailable when display Hold is active.
Using The Features Backlight (For 73 only) Note – Press the Backlight Button display backlight. to toggle in and out the Auto Power Off (Battery Saver) Note – If the Meter idles for more than 10 minutes, the Meter automatically turns the power off. When this happens, the LCD displaying-state of the Meter is saved. The Meter can be turned back on by pushing any button, the LCD displays the saved state. Pushing Hold button to disables the hold state.
Maintenance Disable Auto Power Off Maintenance Caution ․ Do not attempt to repair this meter. It contains no userserviceable parts. Repair or servicing should only be performed by qualified personal. ․ Failure to observe this precaution can result in injury and can damage the meter. Cleaning and storage Periodically wipe the housing with a damp cloth and mild detergent. Dirt or moisture in the terminals can affect readings.
Maintenance Fuse Replacement (For 72 & 73 only) Refer to the following figure to replace fuse : Caution ․ Use ONLY a fuse with the amperage, interrupt, voltage, and speed rating specified. ․ Fuse rating : 10A, 500V Battery Replacement Refer to the following figure to replace the battery : Caution ․ Replace the battery as soon as the low battery indicator "" appears, to avoid false reading. ․ 71 : Battery 1.
Trouble Shooting Trouble Shooting Do not attempt to repair your Meter unless you are qualified to do so and have the relevant calibration, performance test and service information. Basic Trouble Shooting If the Meter fails, first check the battery, the battery connection, fuse, test leads, and replace as necessary. Review this manual to make sure that you are operating the Meter correctly. Testing the Fuse and Test Leads Testing the fuse and test leads as shown below.
Specification Specification General Specifications Display : 6000 counts updates 1.5/sec. 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. Auto Power Off : Approx 10 minutes. Operating Ambient : Non-condensing ≦10°C,11°C ~ 30°C (≦80% R.H) 31°C ~ 40°C (≦75% R.H), 41°C ~ 50°C (≦45% R.H), Storage Temperature : -20ºC to 60ºC , 0 to 80% R.H.
Specification Electrical Specifications Accuracy is ± (% reading + number of digits) at 23ºC ± 5ºC , less than 80% R.H. (1) DC / AC Volts Range DC Accuracy AC Accuracy ±(0.5% + 2dgt) 50Hz / 60Hz sine wave only for 600.0mV range, ±(0.9% + 5dgt) 50Hz ~ 500Hz *1 600.0mV 6.000V 60.00V 600.0V DC1000V / AC750V Over voltage protection : DC1000 V or AC 750 Vrms. Input Impedance : 10MΩ // less than 100pF.
Specification (2) DC / AC Current Range DC Accuracy AC Accuracy Voltage Burden N/A <4mV /µA ±(1.5% + 5 dgt) 50Hz ~ 500Hz *1 2V max 600.0µA 6000µA 6.000A *2 ±(1.0% + 2 dgt) 10.00A *2 Overload Protection : A input : 10A (500V) fast blow fuse µA input : 600V rms. * 1 AC Conversion Type : Conversion type and additional specification are same as DC/AC Voltage. * 2 (For 72 & 73 only) (3) Resistance Range Accuracy Overload protection 600.0Ω *2 6.000KΩ 60.00KΩ ±(0.7% + 2 dgt) 600V rms 600.0KΩ 6.
Specification (4) Diode Check and Continuity Range Resolution Accuracy 10 mV ±(1.5% + 5 dgt)* * For 0.4V ~ 0.8V Max.Test Current : 1.5mA Max. Open Circuit Voltage : 3V Overload Protection : 600V rms. Continuity : Built-in buzzer sounds when resistance is less than approximately 500Ω. Response time is approximately 100 msec. (5) Frequency Range 6000Hz 60.00KHz 600.0KHz ** Sensitivity Accuracy 100mV rms * Frequency : 0.1%±1digit 6.000MHz 250mV rms 60.
Specification (6) Capacitance Range Accuracy 6.000nF 60.00nF 600.0nF 6.000µF ±(1.9% + 8 dgt) 60.00µF 600.0µF 6.000mF * Overload Protection : 600V rms. * < 100 dgt of reading rolling. (7) Auto Power Off (APO) If the Meter idles for more than 10 minutes, the Meter automatically turns the power off.
Terms In The Specification Terms In The Specification RMS : The physical meaning of RMS (Root ← Mean ← Square) : If the heat energy, temperature, in a resistor produced by a AC signal during the periodic time T is the same as produced by a DC signal during the same time T then we know “ The DC signal value is the RMS value of the AC signal” T1 VDC T2 VAC When T1 = T2, The VDC value is the VRMS value of a VAC signal According the definition of physical meaning we can derive the mathematic operation proced
Terms In The Specification Average sensing RMS calibrated technical : Most digital multimeters use an average sensing RMS calibrated technique of an electrical average circuit to measure RMS value of AC signals. This technique is scaling the output average value of the average sensing circuit by the ratio of RMS value to average value, for sine wave the ratio is 1.11. Unfortunately, this ratio varies widely as a function of the wave form, it will give grossly incorrect results in many cases.
Terms In The Specification True RMS technical : The true RMS technique multimeter use the RMS mathematic operation procedures in the electric circuit to obtain the true RMS value. So the true RMS measurement is independent of the wave form of the signal under test normally. The applications for true RMS measurement, for example, is the measurement of the energy content of SCR waveforms at differing firing angles and measurement of noise and measurement of distorted waveforms with the presence of harmonics.
Terms In The Specification CMRR (Common Mode Rejection Ratio) : The CMRR is the ability of a multimeter to reject the Common Mode Voltage Vcm (The voltage present on both the COM and VOLTAGE input terminal with respect to earth ground). The Vcm normally comes from the electromagnetic interference of high voltage power source line or generators. NMRR (Normal Mode Rejection Ratio) : The NMRR is the ability of a multimeter to reject the unwanted AC noise, VNM, in DC measurement.
APPA TECHNOLOGY CORP. 9F.119-1 Pao-Zong Rd., Shin-Tien, Taipai, 23115, Taiwan, R.O.C. Tel : 886-2-29178820 Fax : 886-2-29170848 E-MAIL : info @appatech.com http ://www.appatech.
