Multimic M-800P User manual

DC in AC CLAMP METER
M - 800P
INSTRUCTION MANUAL
Thank you very much for selecting our model 800P
DC in AC Clamp Meter.
Before use the instrument, read this instruction manual
completely and familiarize yourself thoroughly with all
functions.
Keep this instruction manual carefully to take out
whenever you need.
MULTI MEASURING INSTRUMENTS CO.,LTD.
Akihabara Murai Bldg. 7F, 1-26 Kanda Sakuma-cho,
Chiyoda-ku, Tokyo, 101-0025 Japan
TEL : [phone] FAX : [phone]
Home Page : http://www.mutimic.com/
E-mail : [email protected]

SAFETY SUMMARY observe by all means
●To use this instrument safely, read this "SAFETY SUMMARY" carefully and apply
the instrument correctly.
●The CAUTIONs and WARNINGs which appear on the following pages are stated
to prevent the operator & other people from the dangers and their properties from
the damages beforehand.
△WARNING : This symbol indicates the contents "Possibilities of the death or
the serious wound can be supposed" caused from mis-operations.
△CAUTION : This symbol indicates the contents "Possibilities of the injury or
only the material damage can be supposed" caused from mis-
operations.
△ WARNING
POSSIBLE ELECTRICAL SHOCK
This instrument is for the use of low voltage circuit.
Do not make measurements of power lines carrying more than AC 600V.
Before use, check and confirm the voltage of circuit to be measured.
Apply only the coated cables and do not clamp bare cables.
POSSIBLE ELECTRICAL SHOCK OR ACCIDENT
Do not handle the instrument in the rain, at humid place, with a drop of water and
or with wet hands.
Do not use the instrument if the CT or CT case are damaged and if something is
wrong with the CT cables.Also, do not use leaving the battery cover off.
Do not give the shock to tip of CT.
When replacing batteries, remove the instrument from all circuits to be measured.
Do not disassemble the instrument.

GENERAL
This “DC in AC CLAMP METER (M-800P)” is the world-first clamp meter, which can
measure not only AC & DC current but also can detect small DC current in AC and can
display its percentage.
SPECIFICATIONS
（1）Measuring Function ：ACA、DCA、DC％in ACA、ACV、DCV
（2）Measuring Method ：CT Clamp Method
（3）CT Inside Diameter ：φ23mm
（4）Measuring Range ：ACA（15A/150A auto）、 DCA（15A／150A auto）、％（DCA in ACA）、
ACV（150V／600V auto）、 DCV（150V／600V auto）
（5）Switching Method ：Rotary Switch
（6）AC Detection ：True RMS（Analog Arithmetic Method）
（7）A/D Conversion ：Successive Approximation Method
（8）Display ：LCD with annunciator
（9）Over Range Display ：「 OL」mark on LCD
（10）Data Hold ：「 DH」mark on LCD, holding the displayed value
（11）0 Adjustment ：By press 0SET switch at DCA range,「△」mark on LCD and 0 display
（12）Sampling Rate ：2 times/sec.
（13）Low Battery Indication：「B」mark on LCD in case of less than operation voltage
（14）Circuit Voltage ：Less than AC／DC 600V（Insulated Conductor）
（15）Operating Temperature ：0℃～40℃、less than 80％RH (w/o condensation)
（16）Storage Temperature ：－10℃～60℃、less than 70％RH (w/o condensation)
（17）Withstanding Voltage ：AC3700V/1 minute, between CT jaw and handle
（18）Safety Standard ：IEC1010-1、CATⅡ600V
（19）Auto Power-off ：Approx. 10 minutes after the final operation in power on
（20）Power Supply ：AAA size alkaline batteries（LR03×3）
（21）Current Consumption ：Approx. 20mA
（22）Outer Dimension ：Approx. 48mm×178mm×24mm
（23）Weight ：Approx. 120g（without batteries）
（24）Accessories ：AAA size alkaline batteries（LR03×3）
Instruction Manual
Test Leads for Voltage Input (Red/Black)
Soft Carrying Case

ACCURACY
Tolerance：23℃±5℃、less than 80％RH、Conductor to be measured at the center of CT
Range
Auto Range
Min. Resolution
Measuring Range
確度
DCA
15A
0.01
0.00～15.00A
±1.0％rdg±5dgt
150A
0.1
15.0～150.0A
±2.0％rdg±5dgt
ACA
15A
0.01
0.00～15.00A
±1.0％rdg±5dgt
150A
0.1
15.0～150.0A
±2.0％rdg±8dgt
DCV
150V
0.1
0.0～150.0V
±1.0％rdg±5dgt
600V
1
150～600V
±1.0％rdg±5dgt
ACV
150V
0.1
0.0～150.0V
±1.0％rdg±5dgt
600V
1
150～600V
±1.0％rdg±5dgt
OPERATION
Name of Each Part & Explanation
①Clamp Type CT ：Current Detection Sensor by Clamping Method
②Open/Close Lever ：By pressing this lever to the inside, CT will open
③Range Switch ：Switch for power ON/OFF and change of measuring ranges.
The instrument will get power off by auto power off function, after
approx. 10 minutes after the final operation under power on condition.
To get power on again, set range switch at OFF once and set power on
again.
④AC/DC Switch ：Apply this switch at range switch「V」. On「AC」side for AC voltage
measurement and 「DC」side for DC voltage.
⑤Data Hold Switch ：By pressing「D HOLD」switch,「DH」mark on LCD and the displayed value
will be hold. By pressing once again, this function will be released.
⑨
③
④
⑤
⑥
②
⑧
⑩
①
⑦

⑥Zero Set Switch ：Apply this switch at range switch「DCA」. By pressing Zero Set Switch,
「△」mark on LCD. (It will take approx. 5 –6 seconds for zero set).
⑦LCD Display ：Digital display for measured value, unit symbol and battery condition.
⑧Hand Strap ：Apply this strap to wrist during measurement to prevent dropping
the instrument.
⑨Battery Compartment ：Batteries are installed (back side).
⑩Voltage Input Terminal: Voltage Input Part (Red/Black). In case of DC, red terminal is + side.
MEASURING METHOD
To operate the instrument safely, observe strictly the contents of Caution/Warning stated.
●DC Current（A）Measurement
1）Set range switch ③from OFF to A position.
2）By zero set switch ⑥, make zero adjustment before measurement.
3）Open clamp CT and apply CT to the one conductor to be measured（locate the conductor to be
measured at the center of CT）. Close CT firmly (in case of DC current, set the current
direction same as to the indication sticker of the instrument).
4）Read the displayed value. In case of over range (more than 165A), 「OL」will appear on LCD.
5）In the place where the display can hardly read, utilize data hold switch ⑤.
6）After measurement, set range switch ③to OFF.
●AC Current（～A）Measurement
1）Set range switch ③from OFF to ～Aposition.
2）Open clamp CT and apply CT to the one conductor to be measured（locate the conductor to be
measured at the center of CT）. Close CT firmly.
3) Read the displayed value. In case of over range (more than 165A), 「OL」will appear on LCD.
4) In the place where the display can hardly read, utilize data hold switch ⑤.
5) After measurement, set range switch ③to OFF.
●Percentage for DC Current contained in AC Current（％）
1）Set range switch ③from OFF to A position.
2）By zero set switch ⑥, make zero adjustment before measurement.
3）Set range switch ③to ％position.
4）Open clamp CT and apply CT to the one conductor to be measured（locate the conductor to be
measured at the center of CT）. Close CT firmly
5）Read the displayed value. ％＝（DC Current ÷AC Current）×100
6）Conditions of Over Range Display「OL」
・Calculated Value becomes more than 100.0％
・In case of AC current 0A
・In case of AC current more than 165A
・In case of DC current more than 165A
7）In the place where the display can hardly read, utilize data hold switch ⑤.
8）After measurement, set range switch ③to OFF.

Red
Black
＋side
Voltage Input Probe
●DC Voltage（V）Measurement
1）Set range switch ③from OFF to V position.
2）Set AC/DC switch ④to DC side.
3）Insert voltage probe to voltage input terminal ⑩.（Red：＋、 Black：－）
4）Apply voltage input leads to the object to be measured.
5）Read the displayed value.
6）In the place where the display can hardly read, use data
hold switch ⑤.
7）After measurement, set range switch ③to OFF.
●AC Voltage（V）Measurement
1）Set range switch ③from OFF to V position.
2）Set AC/DC switch ④to AC side.
3）Insert voltage probe to voltage input terminal ⑩.
4）Apply voltage input leads to the object to be measured.
5）Read the displayed value.
6）In the place where the display can hardly read, use data hold switch ⑤.
7）After measurement, set range switch ③to OFF.
※In case of DC current measurement, zero point may change by influences of magnetization,
terrestrial magnetism, etc. Make zero adjustment by zero set switch ⑥before measurement.
※When measuring current for a long time, the errors may get bigger caused from surrounding
temperatures and or CT magnetizations.
△
！WARNING
POSSIBLE ELECTRICAL SHOCK
●Test probes are consumption articles. Confirm that there are no damage at the
insulate coat part of probes. If you find any unusualness, stop the use instantly
and repair or replace the probes.
POSSIBLE FIRE HAZARD, BURN
●Connect test probes firmly. In case of mis-connection, it may cause spark.

REPLACEMENT OF BATTERIES
△
！WARNING
POSSIBLE ELECTRICAL SHOCK OR ACCIDENT
●Do not replace the batteries under the conditions of measuring current or voltage
●Do not operate the instrument with battery cover off.
△
！CAUTION
When not using the instrument for a long period, remove the batteries and keep
separately. The batteries may leak and may cause damage to the instrument.
●「B」sign will appear on the display when batteries are exhausted and get less than operation
voltage. Replace to new batteries immediately.
●Do not use the batteries mixed new one and once used and or different kind ones.
〔How to replace the batteries〕
●Remove the screw fixing battery cover
at the bottom of rear case by + driver
and slide & remove the battery cover
to the direction of arrow mark.
●Pick up the exhausted batteries.
●Confirm the polarities and put the new
batteries.
●Replace the battery cover to the original
position and fix screw by driver.
→Battery Cover
AAAAlkaline Battery (LR-03) x 3

4. REPAIR SERVICE
When requesting for repair service, please bring the instrument directly to the dealer where you bought.
When mailing the instrument, always pack it in its original or equivalent packing materials to avoid any damage
during the transportation and also put together with documents showing your name, address, phone number and
defect point.
5. WARRANTY
This instrument is sent out from our factory after the sufficient internal inspections but if you find any defect due
to the fault in our workmanship or the original parts, please contact the dealer where you bought the instrument.
The warranty period is 12 months from the date of purchase and the instrument shall be repaired at free of
charge, provided that we judge the cause of defect is obviously resulted from our responsibility.
GURANTEE REGULATIONS
1. This instrument is warranted for the operation under normal use for 12 months from the date of purchase.
2. This warranty does not cover the following defects:
a. Defect caused from the improper use and operation.
b. Defect caused from the use, operation and storage beyond the original specifications, designs and
conditions.
c. Defect caused from the renovations or repairs done by someone else than us or our representatives.
d. Defect not caused from our responsibilities.