Sanwa PC720M Instruction Manual
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Sanwa PC720M Instruction Manual

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PC720M
DIGITAL MULTIMETER
INSTRUCTION MANUAL

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Summary of Contents for Sanwa PC720M

  • Page 1 PC720M DIGITAL MULTIMETER INSTRUCTION MANUAL...

  • Page 2: Table Of Contents

    Table of Contents [1] SAFETY PRECAUTIONS Explanation of Warning Symbols Warning Instructions for Safe Use Overload Protection [2] APPLICATIONS AND FEATURES Applications Features [3] Parts Identification Multimeter and Test Leads Display [4] DESCRIPTION OF FUNCTIONS Power Switch/Function Selector Auto Power Saving Low Battery Indication Measuring Function Selection Range Hold...
  • Page 3 AC Current ( )/ Frequency (Hz) Measurement 5-11 Measurements with Separately Available Accessories [6] MAINTENANCE Simple Examination Calibration Battery and Fuse Replacement Storage [7] AFTER-SALE SERVICE Warranty and Provision Repair SANWA web site [8] SPECIFICATIONS General Specifications Measuring Range and Accuracy...

  • Page 4: Safety Precautions

    *Before use, read the following safety precautions. This instruction manual explains how to use your digital multimeter PC720M. Before using, read through this manual to reduce the risk of fire , electric shock, and/or injury. And save it together with the product so that you can refer to the manual as necessary.

  • Page 5: Warning Instructions For Safe Use

    1-2 Warning Instructions for Safe Use WARNING 1. Do not use the instrument if the meter or test leads look damaged. 2. Be sure to use the specified fuse. Neither use unspecified fuse nor short-circuit the fuse holder. 3. Do not apply higher voltage or current than the max. ratings by each function.

  • Page 6: Overload Protection

    1-3 Overload Protection Measuring Function Max. Rated Input Overload Protection Terminal 「 」 1000V dc/ac 1050V rms, 1450V peak 「 」 , 「 」 「 」 , 「 」 10V dc/ac Do not apply 「 」 , 「 」 600Vrms any voltage or current.

  • Page 7: Applications And Features

    [2] APPLICATIONS AND FEATURES 2-1 Applications This instrument is a portable digital multimeter designed to measure light electric circuits. The instrument offers not only measurements for small communication equipments, home electric appliances, output from a wall socket, and many batteries, also circuit analyses with additional functions.

  • Page 8: Parts Identification

    [3] Parts Identification Light shielding magnet cap 3-1Multimeter and Test Leads Optical communication unit connector LCD display Range hold button (Temperature function selector) Select button (Backlight button) Data logging button Crest capture button Relative button MAX/MIN recording button Data hold button Power/ Function selector Measuring terminal...
  • Page 9 How to detach the light shielding magnet cap Light shielding magnet cap ⇒ Attached Turn the light shielding magnet cap counterclockwise to detach. An application of the light shielding magnet cap Attach the light shielding magnet cap DMM body with side touched to the wall.

  • Page 10: Display

    3-2 Display ⑤ ⑥ ⑮ ⑯ ⑫ ⑩ ⑪ ② ⑦ ⑧ ⑱ ⑨ ⑩ ⑪ ⑫ ⑬ ⑰ ④ ⑭ ① ③ ① Main display ② Sub display ③ Analog bar graph ④ Relative mode indicator ⑤ Auto range mode indicator ⑥...

  • Page 11: Description Of Functions

    [4] DESCRIPTION OF FUNCTIONS 4-1 Power Switch/Function Selector Turn the switch to turn on/off the power and select a measuring function. All segments of the LCD display will be turned on for 2 seconds after power-on, and then the meter will be ready to use. Note: The push buttons between the display and the function selector work differently depending on how long you press.

  • Page 12: Low Battery Indication

    4-2-2 How to disable the Auto Power Saving Press the SELECT button while turning the meter power on. Release the SELECT button after is turned off. (All segments of the display turn on after power-on.) Then the meter will be ready to use. Turn the power switch OFF and then back on to resume.

  • Page 13: Range Hold

    「Temp」 ・ ： [ C ] ⇔ [ F ] ( C: ℃ , F: 「 」 ・ ： [ ] ⇔ [ 「 」 ・ ： [ (m) ] ⇒ [ (m) / ( m) ] ⇒ [ (m) / (m) ] ⇒ [ (m) /Hz] ⇒ [ (m) ] ⇒...

  • Page 14: Beeper Control

    4-7 Beeper Control Press the RANGE HOLD button while turning the meter power on to disable the beeper. Release the RANGE HOLD button after is turned off. (All segments of the display turn on right after power- on.) Then the meter will be ready to use. Turn the power switch OFF and then back on to resume.

  • Page 15: Data Logging (Recording)

    4-9 Data Logging (Recording) The data logging feature to store up to 87,328 readings (single display) or 43,664 readings (dual display) The instrument employs nonvolatile memory. The internal memory data will remain even after power-off or replacing the battery. Note: 「...
  • Page 16 ①　　　　　　　　　　　　　　 ② / ③ More than 1 second ② / ③　　　　　　　 　　　　　 ④ More than 1 second ― 13 ―...
  • Page 17 4-9-2 Start/Stop Data Logging • The Meter supports multi-session data-logging. Multiple functions can be logged one-at-a-time into the meter's free memory up to 999 separate session-pages without erasing the formerly logged one(s). • Press button for 1 sec. or more to start the data-logging mode.
  • Page 18 New logging starts New logging starts w i t h o u t e r a s i n g a f t e r e r a s i n g 0.5s 0.5s • Press SELECT button to toggle the LCD display between measuring data and logged data item number.
  • Page 19 4-9-3 Pause/Continue Data Logging • Press (PAUS/CONT/STOP) button to pause/continue/ stop logging. • Press (PAUS/CONT/STOP) button for 1 sec. or more to stop logging. • When a sampling speed of 30s or longer is selected, the meter will enter a 50% power down mode between data logging measurements displaying only the swinging pointer.
  • Page 20 4-9-4 Recall logged data ▲ and ▼ buttons simultaneously to enter the • Press the Recall mode. The last session-page number shows up for 0.5 second before displaying the last logged data item. indicators turn on. • Press the ▲ or ▼ button to review the logged data one-at- a-time in sequence.
  • Page 21 0.5s ― 18 ―...

  • Page 22: Test Leads Improper Connection Warning

    4-10 Test Leads Improper Connection Warning The meter beeps as well as displays “InEr” to warn the user against possible damage to the meter due to test leads improper connections to the , or measuring jacks when other function (like voltage function) is selected. (Temperature measurement function is an exception.) Note: “InEr”...

  • Page 23: Crest Capture Mode (Sampling Time: 1Ms)

    4-11 Crest capture mode (Sampling time: 1ms) Press the CAPTURE button to activate the crest (Instantaneous Peak-Hold) mode to capture voltage or current signal duration which is longer than 1ms. and MAX indicators turn on. The meter beeps when new MAX (maximum) or MIN (minimum) reading is updated.

  • Page 24: Terms

    4-15 Terms Analog bar graph The analog bar graph provides a visual indication of measurement like a traditional analog meter needle. True RMS True RMS is a term which identifies a DMM that responds accurately to the effective RMS value regardless of the waveforms such as: square, sawtooth, triangle, pulse trains, spikes, as well as distorted waveforms with the presence of harmonics.
  • Page 25 Root Mean Average Crest Form 0 to PEAK Square Value Value Factor Factor Input Waveform Vrms Vavg Vp/Vrms Vrms/Vavg π − − √ − Sinusoidal √ √ π π 2π wave =0.707Vp =0.637Vp =1.111 =1.414 Square wave 2π π − −...

  • Page 26: Measuring Procedure

    [5] Measuring procedure 5-1 Pre-operational Check WARNING 1. Do not use the instrument if the meter or test leads look damaged. 2. Make sure the test leads and the fuse are not broken. CAUTION Make sure the low battery indicator is off after power-on. Replace the battery with new one if the indicator is on.
  • Page 27 START Damaged Meter/Test leads damaged? Looks OK ① Connect the red plug of the test lead to measuring terminal and the black one to the COM terminal. ② Set the function selector to ③ Press the SELECT button to select the continuity check ( ). ④...

  • Page 28: Impedance

    「 」 (Max. rated input voltage: 1,000V dc/ac, Initial impedance: 3 kΩ) • Automatic measurement for Ω ・ V under Low Impedance WARNING Auto Ω ・ V mode input impedance increases abruptly from initial 3kΩ to a few hundred kΩ’s on high voltage hard signals. “LoZ” displays on the LCD to remind the users of being in such low impedance mode. Peak initial load current, while probing 1000V ac for example, can be up to 471mA (1000V x 1.414 / 3kΩ), decreasing abruptly to approx.
  • Page 29 1) Measuring range (Automatic function selection) • LoZ : 1.5 to 999.9Vdc, -1.0V to -999.9Vdc • LoZ : 3Vac to 999.9Vac (50/60Hz) • LoZΩ: 0.0Ω to 60.00MΩ 2) Measuring procedure ① Connect the red plug of the test lead to the AutoΩ ・ V measuring terminal and the black one to the COM terminal. ②...
  • Page 30 Auto Ω ・ V Auto Ω ・ V Note: • Range-Lock and Function-Lock Feature: When a measurement reading is being displayed in AutoΩV mode, press the RANGE or SELECT button to lock the range or function it was in. Press the button repeatedly to step through the ranges or functions.

  • Page 31: Ac Voltage ( ) / Frequency (Hz) Measurement

    「 」 (Max. rated input voltage: 1,000V dc/ac) • AC Voltage ( )/Frequency (Hz) Simultaneous Measurement WARNING 1. Do not apply any input signal exceeding the max. rated input voltage. 2. Do not switch the function selector while measuring. 3. Keep your fingers behind the finger guards of the test leads while measurement.
  • Page 32 Hz / / Hz Note: Hz input sensitivity varies automatically with a selected voltage range. 9.999V range has the highest sensitivity and the 999.9V range has the lowest sensitivity. Auto ranging measurements normally set the most appropriate trigger level. You can also press the RANGE HOLD button to select another trigger level (voltage range) manually.
  • Page 33 Frequency measurement (Hz) Range Frequency range Input sensitivity (Sine wave) 9.999V 2.5V 99.99V 15.00Hz to 10.00kHz 999.9V 100V The display style of [Hz/ ] does not show the bar graph. As a normal condition, non-connected test leads may cause unstable readings. ―...

  • Page 34: Dc Voltage ( )/Ac Voltage ( )

    「 」 (Max. rated input voltage: 1,000V dc/ac) ・ DC Voltage( ) measurement ・ DC Voltage( )/AC Voltage( ) simultaneous measurement ・ DC+AC voltage( )/AC Voltage( ) simultaneous measurement WARNING 1. Do not apply any input signal exceeding the max. rated input voltage. 2.
  • Page 35 ― 32 ―...
  • Page 36 Note: ・ The display style of [ / ] or [ / ] does not show the bar graph. ― 33 ―...

  • Page 37: And Duty Cycle ( D%) Measurement

    「 」 (Max. rated input voltage: 10V dc/ac) ・ DC voltage (m ) measurement ・ DC Voltage (m )/AC Voltage(m ) simultaneous measurement ・ DC+AC Voltage (m )/AC Voltage (m ) simultaneous measurement ・ Logic-level frequency ( ) measurement ・ Duty cycle ( D%) Measurement WARNING 1.
  • Page 38 3) Measuring procedure ① Connect the red plug of the test lead to the VHz measuring terminal and the black one to the COM terminal. ② Set the function selector to ③ Press the SELECT button to select a function you want to perform.
  • Page 39 m / m ― 36 ―...
  • Page 40 Note: ・ The display style of [m /m ], [m ], [ or [ D%] does not show the bar graph. ― 37 ―...

  • Page 41: Ac Voltage ( M ) / Frequency (Hz) Measurement

    「 」 5-6 　 (Max. rated input voltage: 600mV dc/ac) ・ AC Voltage (m )/Frequency (Hz) Simultaneous Measurement WARNING 1. Do not apply any input signal exceeding the max. rated input voltage. 2. Do not switch the function selector while measuring. 3.
  • Page 42 / Hz Hz / m Note: Frequency measurement (Hz) Range Frequency range Input sensitivity (Sine wave) 60.00mV 40mV 15.00Hz to 50.00kHz 600.0mV 60mV ・ The display style of [Hz/m ] does not show the bar graph. ・ As a normal condition, non-connected test leads may cause unstable readings.
  • Page 43 「 」 5-7 　 (Do not apply any voltage or current.) ・ Resistance (Ω) measurement ・ Conductance (nS) Measurement ・ Continuity Check ( WARNING Do not apply any voltage or current to the measuring terminals. CAUTION In the case of high resistance measurement, readings may be unstable due to external inductive influence.
  • Page 44 3) Measuring procedure ① Connect the red plug of the test lead to measuring terminal and the black one to the COM terminal. ② Set the function selector to ③ Press the SELECT button to select a function you want to perform. ④...
  • Page 45 Note: ・ [nS] function does not show the bar graph. ・ To avoid external noise influence, shield the object to measure with COM potential. Measurements with finger-touched test pins may cause some errors being influenced by human body conductance. ― 42 ―...

  • Page 46: Temperature Measurement

    「 」 5-8 　 (Max. rated input voltage: 50mV dc) ・ Temperature measurement ( ℃ ) or ( F ) ( For K-type thermocouple) WARNING 1. Pay attention in order to avoid risk of burn depending on the object temperature or measuring environment. 2.
  • Page 47 ― 44 ―...
  • Page 48 T1 / T2 ― 45 ―...
  • Page 49 (T1 - T2) / T2 Note: • Temperature function does not show the bar graph. • The provided K-type thermocouple (K-250PC) is a polar device. Connect the device to the meter properly. • The range of K-250PC is -50 ℃ to 250 ℃ . • Separately available K-type adapter (K-AD) allows you to use other international standard mini plug thermocouples.

  • Page 50: Capacitance ( ) Measurement, Diode ( ) Test

    「 」 5-9 　 (Do not apply any voltage or current.) ・ Capacitance ( ) measurement ・ Diode ( ) test WARNING 1. Do not apply any voltage or current to the measuring terminals. 2. Measuring live circuit may damage the meter. 5-9-1 Capacitance ( ) measurement CAUTION...
  • Page 51 Note: ・ Capacitance function does not show the bar graph. ― 48 ―...
  • Page 52 5-9-2 Diode ( ) test What to measure (Diode test): Judging the diode (Good or defective) Measuring procedure ① Connect the red plug of the test lead to measuring terminal and the black one to the COM terminal. ② Set the function selector to , then press the SELECT button to select the diode test.
  • Page 53 Reverse biased test Forward biased test Note: ・ Open circuit voltage between the measuring terminals: <3.5V dc ・ Test current: 0.4mA (typical) ・ Diode test function does not show the bar graph. ― 50 ―...

  • Page 54: Dc Current ( )/Ac Current ( )/Dc+Ac Current ( ), Ac Current ( )/ Frequency (Hz) Measurement

    「 」 「 」 , 　 5-10 ・ DC current (m ,μ , ) measurement ・ AC current (m , μ )/Frequency(Hz) simultaneous measurement ・ DC current (m μ )/AC current (m μ simultaneous measurement ・ DC+AC current (m μ )/AC current (m μ...
  • Page 55 5-10-1 Current (mA/μA) measurement (m , m , m , μ , μ , μ Max. rated input current 600mA dc/ac) 1) What to measure ・ m , μ (DC current): DC circuit current ・ m , μ (AC current): AC circuit current ・...
  • Page 56 Note: Measuring Frequency (Hz) Frequency range Range Input sensitivity(Sine wave) 600.0μA 60μA 6000μA 600μA 15.00Hz ～ 3.000kHz 60.00mA 40mA 600.0mA 60mA 5-10-2 Current (A) measurement （ , , Max. rated input current AC 10A dc/ac ） 1) What to measure ・...
  • Page 57 μ μ / μ ― 54 ―...
  • Page 58 μ / μ μ / Hz ― 55 ―...
  • Page 59 m / Hz / Hz Note: ・ > 6A: Cool down more than 3 minutes after measuring 1 minute. < 6A Continuable Measuring Frequency (Hz) Frequency range range Input sensitivity (Sine wave) 6.000A 15.00Hz ～ 3.000kHz 10.00A ― 56 ―...

  • Page 60: Measurements With Separately Available Accessories

    5-11Measurements with Optional Products WARNING 1. Do not apply any input exceeding max. rated input for the separately available accessories. 2. 2. Do not switch the function selector while measuring. CAUTION To make measurements of consumption current for home appliances using a current probe, use a line separator as shown in the drawing below.
  • Page 61 ① Connect the red plug of the current probe to the V measuring terminal and the black one to the COM terminal. ② Set the function selector to , then press the SELECT button to select /Hz. ③ Press the RANGE button to set the 9.999V range. ④...
  • Page 62 m , then press the RABGE button to set 600.0mV range. To make AC current measurement (ACA), set the function selector to and press the SELECT button to select m /Hz, then press the RANGE button to set 600.0mV range. ③...
  • Page 63 ③ Set the range selector knob on the current probe to the 30A range or 300A range. *Before making DC current measurement, turn the Center Adjuster knob to make the reading zero. ④ Open the clamp jaws of the clamp probe and clamp the wire to measure.

  • Page 64: Maintenance

    [6] MAINTENANCE WARNING 1. The followings are important to safety. Read this manual throughly to maintain the instrument. 2. Calibrate and inspect the instrument at least once a year to ensure safety and maintain its accuracy. 6-1 Simple Examination 1) Appearance • Check for damaged appearance by dropping down and so on.

  • Page 65: Battery And Fuse Replacement

    6-3 Battery and Fuse Replacement WARNING 1. Do not open the rear case with live measuring terminals to avoid electric shock. Also, make sure the meter power is OFF, before starting replacement. 2. Be sure to use the specified fuse. Neither use unspecified fuse nor short-circuit the fuse holder.

  • Page 66: Storage

    Rear case Battery door Battery holder Fuses Screw for the battery door 6-4 Storage CAUTION 1. The panel and case are not resistant to volatile solvents. Do not wipe out with solvents or isopropyl alcohol. Clean the instrument up with a dry soft cloth.

  • Page 67: After-Sale Service

    (1) year from the date of purchase. This warranty policy is valid within the country of purchase only, and applied only to the product purchased from Sanwa authorized agent or distributor. Sanwa reserves the right to inspect all warranty claims to determine the extent to which the warranty policy shall apply.

  • Page 68: Sanwa Web Site

    An instrument sent to Sanwa / agent / distributor without above information will be returned to the customer. Note: 1) Prior to requesting repair, please check the following: Capacity of the built-in battery, polarity of installation and discontinuity of the test leads.

  • Page 69: Specifications

    [8] SPECIFICATIONS 8-1 General Specifications Operation Delta-sigma modulation method 9999 counts: ACV, DCV, Hz, and nS Numeric part 6000 counts: mV, μA, mA, A, Ohm, and LCD display Capacitance Bar graph part Up to 41 segments Over-range Over-range input turns on "OL" indicator at the numeric part. indication Numeric part 5 times / sec.
  • Page 70 IEC61010-1:2001 IEC61010-031:2008 Category II for 1000V ac and dc Category III for 600V ac and dc Safety Compliances Category II for 500V ac and dc Category III for 300V ac and dc Category II for 500Vac and 300Vdc Category III for 300Vac and 150Vdc Meets EN61326-1:2006 In an RF field of 3V/m: Capacitance function is not specified...

  • Page 71: Measuring Range And Accuracy

    8-2 Measuring Range and Accuracy Accuracy: ±(% rdg + dgt) rdg: reading, dgt: least significant digit Temperature: 23 ℃ ±5 ℃ , Humidity: <75% R.H. True RMS voltage and current accuracies are specified from 10% to 100% of each range otherwise specified. Crest factor: <2:1 (at full scale), <4:1 (at half scale) DC Voltage DCV...
  • Page 72 AC Voltage ACV and DC+AC Voltage DC+AC V AC voltage/ Frequency for dual display Range Accuracy 50Hz ～ 60Hz 60.00mV, 600.0mV, 9.999V, ± (0.5% rdg + 3dgt) 99.99V, 999.9V 40Hz ～ 500Hz 60.00mV, 600.0mV ± (0.8% rdg + 4dgt) 9.999V, 99.99V ±...
  • Page 73 DC Voltage/AC Voltage, DC+AC Voltage/AC Voltage for dual display Range Accuracy 50Hz ～ 60Hz 60.00mV, 600.0mV ± (0.7% rdg + 6dgt) 9.999V, 99.99V, 999.9 40Hz ～ 1kHz 60.00mV, 600.0mV ± (1.0% rdg + 6dgt) 9.999V, 99.99V, 999.9V ± (2.2% rdg + 6dgt) 1kHz ～...
  • Page 74 DC current Range Accuracy Input resistance** 600.0μA Approx. 83Ω 6000μA 60.00mA ± (0.2% rdg + 4dgt) Approx. 1Ω 600.0mA 6.000A Approx. 0.05Ω 10.00A* * > 6A: Cool down more than 3 minutes after measuring 1 minute. < 6A Continuable **Fusing resistor not included AC current ACA and DC+AC current DC+AC A Range Accuracy...
  • Page 75 Resistance (Ω) Range Accuracy 600.0Ω, 6.000kΩ, ± (0.1% rdg + 3dgt) 60.00kΩ, 600.0kΩ 6.000MΩ ± (0.4% rdg + 3dgt) 60.00MΩ ± (1.5% rdg + 5dgt) 99.99nS ± (0.8% rdg+10dgt) Open circuit voltage: <1.2Vdc (<1.0Vdc for 60.00MΩ range) For AutoΩ ・ V function ( Resistance) Range Accuracy 600.0Ω, 6.000kΩ ± (0.5% rdg+4dgt) 60.00kΩ, 600.0kΩ...
  • Page 76 Frequency (Hz) Measuring ranges Input sensitivity* Frequency ranges 60.00mV 40mV 15.00Hz to 50.00kHz 600.0mV 60mV 9.999V 2.5V 99.99V 15.00Hz to 10.00kHz 999.9V 100V 600.0μA 60μA 6000μA 600μA 60.00mA 40mA 15.00Hz to 3.000kHz 600.0mA 60mA 6.000A 10.00A Accuracy: ±0.04% rdg+ 4dgt *Specified based on sine wave RMS Logic level frequency ( ) and Duty cycle (D%)
  • Page 77 Capacitance Range Accuracy* ± （ 0.8% rdg + 3dgt ） 60.00nF, 600.0nF ± （ 1.0% rdg + 3dgt ） 6.000μF ± （ 2.0% rdg + 3dgt ） 60.00μF ± （ 3.5% rdg + 5dgt ） 600.0μF ** ± （ 5.0% rdg + 5dgt ） 6.000mF ** ±...
  • Page 78 Max/Min (with capture mode) Accuracy: Specified accuracy ±250dgt Sampling time: Approx. 1ms Max/Min (with recording mode) Accuracy: Specified accuracy ±10dgt (for changes > 100ms in duration) How to calculate an accuracy Example) DC voltage measurement (DC mV) True value: 100.0 [mV] Range accuracy: ±(0.06%rdg+2dgt) in the 600.0mV range Measuring error: ±(100.0 [mV]×0.06% rdg +2dgt) ≒...
  • Page 79 < MEMO > ― 76 ―...
  • Page 80 本社 = 東京都千代田区外神田2−4−4･電波ビル 郵便番号 = 101-0021･電話 = 東京 （03） 3253−4871㈹ 大阪営業所 = 大阪市浪速区恵美須西2−7−2 郵便番号 = 556-0003･電話 = 大阪 （06） 6631−7361㈹ SANWA ELECTRIC INSTRUMENT CO.,LTD. Dempa Bldg., 4-4 Sotokanda2-Chome Chiyoda-Ku,Tokyo,Japan This manual employs soy ink. 02-1012 5008 6010...

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