DMM SANWA PC720M Manuale utente

PC720M

DIGITAL MULTIMETER

INSTRUCTION MANUAL

Table of Contents

[1] SAFETY PRECAUTIONS

1-1 Explanation of Warning Symbols

1-2 Warning Instructions for Safe Use

1-3 Overload Protection

[2] APPLICATIONS AND FEATURES

2-1 Applications

2-2 Features

[3] Parts Identification

3-1 Multimeter and Test Leads

3-2 Display

[4] DESCRIPTION OF FUNCTIONS

4-1 Power Switch/Function Selector

4-2 Auto Power Saving

4-3 Low Battery Indication

4-4 Measuring Function Selection

4-5 Range Hold

4-6 Data Hold

4-7 Beeper Control

4-8 PC (Personal Computer) Interface

4-9 Data Logging (Recording)

4-10 Test Leads Improper Connection Warning

4-11 Crest capture mode (Sampling time: 1ms)

4-12 MAX/MIN Recording Mode

4-13 Relative Measurement

4-14 Back Light

4-15 Terms

[5] Measuring procedures

5-1 Pre-operational Check

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・

V under Low

Impedance

5-3 AC Voltage ( ) / Frequency (Hz) Measurement

5-4 DC voltage ( )/AC Voltage ( )/

DC+AC Voltage ( ) Measurement

5-5 DC Voltage (m )/AC Voltage ( m )/

DC+AC Voltage (m ), Logic-Level Frequency ( Hz)

and Duty Cycle ( D%) Measurement

5-6 AC Voltage ( m ) / Frequency (Hz) Measurement

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and Conductance (nS) Measurement

5-8 Temperature Measurement

5-9 Capacitance( )Measurement, Diode ( ) Test

5-10 DC Current ( )/AC Current ( )/DC+AC Current ( ),

AC Current ( )/ Frequency (Hz) Measurement

5-11 Measurements with Separately Available Accessories

[6] MAINTENANCE

6-1 Simple Examination

6-2 Calibration

6-3 Battery and Fuse Replacement

6-4 Storage

[7] AFTER-SALE SERVICE

7-1 Warranty and Provision

7-2 Repair

7-3 SANWA web site

[8] SPECIFICATIONS

8-1 General Specifications

8-2 Measuring Range and Accuracy



●Messagesonthedisplay

Messages Description What to do

InEr

Test leads improper connection warning

(Malfunction when low battery)

See 4-10 (Page 19)

See 4-3 (Page 9)

rE-O Self-diagnostic See 6-2 (Page 61)

C_Er

―2――1―

1-2 Warning Instructions for Safe Use

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. (See 1-3)

4. Use caution when working with voltages above 33 V ac rms, 46.7 V ac

peak, or 70 V dc. These voltages pose a shock hazard.

5. Do not use the meter to measure lines that may have inductive voltage

or surge voltage (e.g. motors) because the input voltage may exceed the

maximum rated voltage.

6. Never operate the meter with the case or battery lid removed.

7. Remove test leads from the meter before opening the meter case for

replacing the battery or fuse.

8. Never attempt to repair or modify the instrument, except for battery and fuse

replacement.

9. Do not use any unspecified type of test leads.

10. Keep your fingers behind the finger guards of the test leads while

measurement.

11. Connect the common test lead (Black) before you connect the live test lead

(Red). Disconnect the live test lead first.

12. Make sure the function, range, and measuring terminals are properly set.

13. Do not switch the function, range, or the plugs to another while

measurement.

14. Do not operate the meter when it is wet or with wet hands.

WARNING

Incorrect measurement may be performed in a ferromagnetic or

intense electric field near transformers, high-current circuits, and

radio equipments.

CAUTION

[1] 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.

Use the instrument only as specified in this manual or the protection

provided by the instrument may be impaired.

The instructions given under the headings of " WARNING" and

must be followed to prevent accidental burn andelectric shock.

1-1 Explanation of Warning Symbols

The meanings of the symbols used in this manual and attached to

the product are as follows.

:Extremely-important instructions for safe use

・

WARNING identifies conditions and actions that could result in

accidental burn and electric shock.

・

CAUTION identifies conditions and actions that could cause

damage the instrument.

:Do not touch! Possible high voltage.

:Ground :Diode Hz:Frequency

:Fuse :Beep :Logic-Level Frequency

:Direct Current(DC) :Capacitor :Duty Cycle

:Alternate Current (AC) : Nano-Siemens (Conductance)

:Resistance :Low Input Impedance

:Temperature ：Double Insulation or Reinforced

:Back light

―4――3―

[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.

2-2 Features

 Compliant with IEC61010-1 CAT. Ⅲ600 V, CAT. Ⅱ1000 V, and

safe design using fuses with large number of breaking capacity.

 9999 count display (ACV, DCV, Hz, nS)

 Fast response display

(Numeric parts: 5 times/Sec. Bar graph part: 60 times/Sec.)

 Dual Display shows "Voltage or Current and its Frequency", and

"AC components and DC components of Voltage or Current"

 True RMS detection for alternate current (AC) (True RMS)

 DC+AC indications available

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 Maximum DC/AC voltage measurement resolution: 0.01 mV

 Frequency (Sensitivity selectable),

Wide capacitance range (0.01 nF to 25.00 mF)

 Automatically range selectable Crest Capture Mode

Sampling time: Approx. 1 ms

 MAX/MIN recording mode with auto ranging

 Relative mode with auto ranging

 Back light to allow for easy visibility in low-lit area

 2 channel simultaneous temperature measurement

(K-type thermocouple: –50 ℃to 1000 ℃)

 Logging function to store up to 87,328 readings

(single display) or 43,664 readings (dual display)

 PCLink7 (separately available software) allows you to download

logged data into your PC with USB optical communication unit

(KB-USB7)

1-3 Overload Protection

Function Measuring

Terminal Max. Rated Input Overload Protection

「」

and

1000 V dc/ac

1100 Vrms

「」,「」

「」,「」 10 V dc/ac

「」,「」 Do not apply

any voltage or

current.

「」

T1+ and -

50 mV dc

T2+ and -

0.4 A/1000 V Fuse

Breaking capacity: 30 kA

and

11 A/1000 V Fuse

Breaking capacity: 20 kA

「」,「」

m AμA

and 600 mA dc/ac

Do not apply

any voltage.

0.4 A/1000 V Fuse

Breaking capacity: 30 kA

「」 and 10 A dc/ac

Do not apply

any voltage.

11 A/1000 V Fuse

Breaking capacity: 20 kA

*The 0.4A fuse has a Time-Current Characteristic Curves projection

of approaching infinity at 0.6 A.

It has a fast acting characteristic of below 0.1 second at beyond 1.5 A.

This protection characteristic matches this meter nicely.

LCD display

Select button

(Backlight button)

Range hold button

(Temperature function

selector)

Crest capture button

MAX/MIN

recording button

Data logging button

Relative button

Power/

Function selector

Measuring terminal

for A

Measuring terminal

for mAμA

Common terminal

measuring

terminal

Data hold button

Light shielding magnet cap

Optical

communication

unit connector

Stand

Battery door

Holster

Finger guards

Plugs Test probe (red)

Test probe (black)

Test leads TL-23a



Detachable test pin covers

Test pins

⇒

↑

↓

Lightshieldingmagnetcap

Attached

Magnetically attractable

material wall (e.g. steel)

DMM body

Attach the light shielding magnet cap

with side touched to the wall.

―6――5―

[3] Parts Identification

3-1 Multimeter and Test Leads

With the detachable test pin covers: CAT. III 600 V

Without the detachable test pin covers: CAT. II 1000 V

How to detach the light shielding magnet cap

Turn the light shielding magnet cap counterclockwise to detach.

An application of the light shielding magnet cap

Note:

Keep the light shielding magnet cap away from cellular phones,

analog watches, floppy disks, magnetic cards, magnetic tapes, and

magnetic tickets. Otherwise, the memorized information may be lost.

① Main display

② Sub display

③ Analog bar graph

④ Relative mode indicator

⑤ Auto range mode indicator

⑥ Data hold indicator

⑦ Recording mode indicator

⑧ Crest capture mode indicator

⑨ Max/Min updating indicator

⑩ DC measurement indicator

⑪ AC measurement indicator

⑫ Temperature measurement indicator

⑬ Polar character

⑭ Low impedance measurement indicator

⑮ Continuity check indicator

⑯ Low battery voltage indicator

⑰ Unit of readings for main display

⑱ Unit of readings for sub display

①

②

③

④

⑤⑥

⑦

⑧

⑨

⑩

⑪

⑫

⑬

⑭

⑮⑯

⑰

⑱

―8――7―

3-2 Display [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. In this

manual, "press" means pressing momentary and "press and

hold for 1 sec. or more" means pressing longer.

4-2 Auto Power Saving

The Auto Power Saving mode turns the meter off automatically

after approximately 30 minutes of no activities. While the Auto

Power Saving mode, following activities set the Auto Power

Saving back.

1) Function selector or push button operations

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test, or continuity check, non-zero readings in the Duty cycle/

Frequency measurement functions, any readings in the

temperature measurement function, or significant measuring

readings of above 512 counts in the other function ranges.

Following activities disable the Auto Power Saving mode

automatically.

1) Crest capture mode or MAX/MIN recording mode is in use

2) Data logging operation is in use

3) Data communication to your PC is in use

4-2-1 How to get back from the Auto Power Saving

Press the SELECT, RANGE HOLD, △REL、or HOLD button, or

disconnect the object to measure and turn the power switch off

and then back on, and select a function before connecting the

object.

―10――9―

・

「」

：>@⇒[ @ ⇒>Q6@⇒>@⇒…

・

「Temp」

：>&@⇔>)@&℃, F: oF)

・

「」

：[ @⇔[ @

・

「」

：[ (m) @ ⇒[ (m) / ( m) @ ⇒[ (m) / (m) @ ⇒[ (m) +]@ ⇒

[ (m) @⇒…

・

「」

：[ μ@ ⇒[ μ/μ@⇒[ μ/μ@⇒[ μ+]@ ⇒[ μ@ ⇒…

At the Temp position, press REANGE HOLD button ( ⇒) to select what

the display shows on the temperature measurement as follows.

>7@⇒>7@⇒>77@ ⇒>777@ ⇒>7@⇒…

Note:

The last selection of each function will be saved as power up

default for repeat measurement convenience.

(Except function)

4-5 Range Hold

Press the RANGE HOLD button to select manual-ranging, and the

meter will remain in the range it was in. ( turns off.) In

the manual-ranging mode, press the button again to step through

the ranges. Select an appropriate range making sure units and

decimal point positions. To resume auto-ranging mode, press and

hold the button for 1 second or more.

Note:

Manual ranging mode is not available in the Hz functions.

4-6 Data Hold

Press HOLD button to freeze present reading for later view. (

indicator turns on.) Input fluctuation will not reflect on the indicated

value. Press the HOLD button again to disable the data hold

feature and go back to the normal measurement mode. (

indicator turns off.)

Note:

Function changes or functional operations will cancel the data hold feature.

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.

Note:

Even in the Auto Power Saving mode, approx. 50 μA will be

consumed. When in the auto power saving mode, intense light

like the direct sunlight into the optical communication unit on

the back of the DMM increases the consumption current. To

prevent unexpected battery wearing down, mount the attached

light shielding magnet cap on the optical comminucation unit

connector when not in use. Always turn the power switch to the

OFF position when the meter is not in use for a long time.

4-3 Low Battery Indication

Decreasing the internal battery voltage to approx. 7 V due to

wearing down turns on the indicator on the LCD display.

Replace the battery with new one when the indicator turns on.

Use under "Low Battery" may cause malfunctions and "InEr" may

be indicated on the display. Replace the battery with new one to

release the error.

4-4 Measuring Function Selection

At each position of the function selector, press SELECT button

(⇒) to select measuring functions as follows.

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9/R=@⇒…

・

「」

：[ +]@⇔[ Hz/ @

・

「 」

：[ @⇒[ / @ ⇒[ / @⇒[ @ ⇒…

・

「」

：[ m @ ⇒[ m / m @ ⇒[ m / m @ ⇒[ @ ⇒>'@

⇒[ m @⇒…

・

「」

：[ m +]@ ⇔[ Hz/ m @

―12――11―

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.

Note:

The beeper for the continuity check and the plug improper

connection warning will not be disabled.

4-8 PC (Personal Computer) Interface

The instrument equips with an optical isolated interface port at the

meter back for data communication. KB-USB7, dedicated USB

optical communication unit (separately available), and PCLink7,

dedicated software, allow you to transfer real time readings and

internally logged data to your PC. For more information, see the

"HELP" for PCLink7 (PC linkage software).

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:

The data logging feature is not available in

「」

mode.

Use of data logging function disables the crest capture mode,

MAX/MIN recording mode, the relative measurement, and Data

Hold function.

4-9-1 Set logging interval

①Select a function you need, then press button for 1 sec. or

more.

②The sampling speed (interval) will be displayed in second.

The "t0.05" (factory default) means the sampling interval is 0.05

second (20 times /Sec.).

③Press ▲or ▼to select one from followings.

(Shortest) 0.05 s, 0.1 s, 0.5 s, 1 s, 2 s, 3 s, 4 s, 5 s, 10 s, 15 s,

30 s, 60 s, 120 s, 180 s, 300 s, 600 s (Longest)

Each of the following functions has its specific shortest time

interval.

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④Press button for 1 sec. or more to set.

Then newly set time interval on the display will brink 2 times

to make sure.

⇒

USB Optical Communication Unit

(KB-USB7)

Optical Communication Unit Connection

Note:

Intense light like the direct sunlight into the optical communication

unit on the back of the DMM increases the consumption current.

Mount the attached light shielding magnet cap on the optical

comminucation unit connector when not in use.

② / ③  ④

① ② / ③

More than 1 second

0.5s

More than 1 second

―14――13―

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).

 Then press the button to start a new logging session

directly without erasing the formerly logged one(s). Or you

can press the ▼button to erase ALL of the formerly logged

session-page(s), and start a new logging session from the

very first session-page (P.001) with maximum meter memory.

 The bar-graph turns to a swinging pointer when data-logging

mode is running.

 Press button for 1 sec. or more to start the data-

logging mode. “LEFt” displays momentarily followed

by a number to indicate the memory points left for new

logging session(s). (Sub / main displays for most-

significant / least-significant numbers separately.)

When the number of logged data reaches the loggable max

value, will be indicated and the logging ends. If you

need the logged data in the internal memory, transfer the

data to your PC and save them. (See 4-8 on the page 11.)

To start a new logging session, erase the past logged data.

Below example illustrates 43,102 memory points are available

for new logging session(s).

Newloggingstarts

withouterasing

Newloggingstarts

aftererasing

0.5s

(PAUS)

● (CONT) ■ (STOP)

More than 1 second

―16――15―

 Press SELECT button to toggle the LCD display between

measuring data and logged data item number. (Sub / main

displays for most-significant / least-significant numbers

separately.)

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 30 s or longer is selected, the

meter will enter a 50 % power down mode between data

logging measurements displaying only the swinging pointer.

Press the SELECT button to resume the real time display,

approx. 4.2 minutes after data logging has started.

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