SZBJ BM87 Instruction Manual

BM87 ENGLISH INSTRUCTION MANUAL
1. Introduction
The digital clamp meter is completely portable, 3 1/2
digits LCD display instrument for measuring AC current,
DC and AC voltage, resistance, diode and for testing
audible continuity. It is kind of ideal facility for
measurement and monitor in electrician materials,
electrical equipment and household electric appliances
etc.
2. Safety Information
This clamp meter has been designed according to
IEC1010 and UL3111-1.
Please read this manual carefully before using the meter.
2.1 Explanation of Symbols
Warning! Important safety information is found in
the manual.
Caution: dangerous voltage, risk of electric shock.
Double insulation (protection class II)
2.2 Never exceed the protection limit values indicated in
the specifications for each range of measurement.
2.3 Check the rotary switch and make sure it is at the
correct position before measuring.
2.4 Before rotating the range selector to change
functions, disconnect test leads from the circuit under
test.
2.5 Never perform resistance measurements and
continuity test on live circuits.
2.6 Exercise extreme caution when measuring live
system with voltage above 60V dc or 30V ac rms.
2.7 Keep fingers behind the barriers while measuring
current.
2.8 Never touch exposed wiring, connections or live
circuit when attempting to take measurements.
2.9 Change the battery when the "
to avoid incorrect data.
3.Specification
3.1 General Specification:
3.1.1 Digital display: 3 1/2 digits LCD display with
maximum reading 1999.
3.1.2 Jaw opening capability: 30mm.
3.1.3 Data hold function: When the HOLD button is
pushed, the display will keep the last reading and "DH"
symbol will appear on the LCD until pushing it again.
3.1.4 Polarity: "-" displayed for negative polarity.
3.1.5 Over-range indication: "1" figure only on the
display.
3.1.5 Low battery indication: When the battery is under
the proper operation range, "
display.
3.1.6 Operating temperature and humidity: 0C~40C，
70%RH.
- +
" symbol appears
- + " will appear on the
3.1.7 Storage temperature and humidity: -10C~60C，
80%RH.
3.1.8 Power supply: 1.5V batteries size 7(AAA)*2
3.1.9 External dimensions: 165 （L） ×68 （W） ×28 （H）
mm
3.1.10 Weight: About 170g (including battery's
weight)
3.2 Electrical Specification:
The accuracy specification is defined as ...%reading
...count.
At 235C，70%RH.
Function Range
Resolution
2000mA 1mA
ACA
20A 0.01A
200A 0.1A
600A 1A
ACV 600V 1V
DCV 600V 1V
2000 1

Forward current: 0.8A. Reversed voltage:
2.6V.
Buzzer sounds at less than50. Open
circuit voltage: 2.6V, Test current: 1mA.
DCV/ACV input impedance :10M
Range : 50~60Hz
4. Operating Instruction
4.1 Front Panel Description
(1) Transformer jaws: Pick up the AC current flowing
through the conductor.
(2) Trigger: Press the lever to open the transformer.
When the lever is released, the jaws will close again.
(3) Rotary switch: This switch is used to selected
functions and desired ranges as well as to turn on/off
the meter.
(4) Data-hold button: The user may hold the present
reading and keep it on the display by pressing the
"Hold" button. When the data is no longer needed,
one may release the data-hold operation by press the
"Hold" button again.
(5) LCD display
(6) "V/" jack: This is positive input terminal for volt and
ohms.
(7) "COM" jack: This is negative (ground) input terminal
for all measurement modes except current.
4.2 AC Voltage Measurement
WARNING! Maximum Input Voltage is 600V AC/DC.
Do not attempt to take any voltage measurement that
may exceed to avoid electrical shock hazard or damage
to this meter.
(1) Set the rotary switch at AC600V position. Connect
the red test lead to "V/" jack and the black test to
Accuracy Overload
protection
40A
40A
2%10
800A
800A
600V
1.2%5
600V
0.8%5
250V
1.0%5
250V
250V
Frequency