1
BM802A INSTRUCTION MANUAL
Ⅰ
. Introduction
Welcome to use this product.
The updated BM802A adopts high-performance MCU processor,it is
Great Value
as has high reliability,security, automatically setting range funcition,hand-held clamp
meter etc.. the
product
has
a
large digital
display, full range
overload
protection, data-hold function, undervoltage indication, auto shut off function,it
has TRUE
RMS
measurement
function
which
can
accurately
measure frequency voltage, non-sinusoidal voltage and inrush current measurement
function which can measure inrush current about 80mS RMS, it also has temperature
measurement function which can accurately measured -50~1000
℃
, the instrument is
suitable for frequency-converting power supply, air conditioning, refrigeration
equipment such as refrigerators, motor performance test, It is more excellent for a
new generation of practical electrical measuring instrument .
This product is ideal instrument for test, maintenance and repais in college,
smelting, communications, manufacturing, petroleum, electric
power, national
defense,electronic, electric power equipment .
Ⅱ
. Safety standard
The meter in structure complies with the safety requirements of ICE61010-1. Read
the instruction carefully as follows before you use the meter:
1. When measuring voltage, AC or DC voltage should not be more than the peak
voltage (DC / AC 1000V) of the meter.
2. Voltage of less than 36V is safety voltage. When the voltage is more than DC 51V
or AC36V, the leads should be checked. The test lead should be connected correctly
and their insulating property should be under excellent status against electric shock.
3. When change of functional measuring range, the test lead should be away from test
point.
4.It is suggested that for safety the functions and range should be selected correctly
although protective function for the full measuring range exists.
5.When measurement of current, the input current shouldn’t be more than the
maximum current labeled on input end.
6. Safety symbols:
Warning!
risk of high voltage and electric shock!
Double insulated.
Ⅲ
. Features
3.1 General
3.1.1The meter is based on CMOS large scale IC and can automatically changed
measuring range for measurement of AC/DC voltage, AC, resistance, frequency and
capacity, which makes the meter easy to be used.
3.1.2 Display mode: Display by LCD.
3.1.3 Maximum display: 3999
3.1.4 Maximum span of jaw: 52mm.
3.1.5 Auto negative polarity indication: Displaying “-”.
3.1.6 Lack of battery power: Displaying “
”.
3.1.7 Auto power OFF
After turning on the instrument and without turning the function switch or
pressing any button, the instrument will automatically enter into sleep mode after 10
minutes,to save battery power.when it is in the sleep mode you can press the SELECT
key to wake up the instrument. If you don't need the automatic sleep mode, you
should hold down the DH key to turn on the instrument, and then the symbol" "
will not be display on the LCD.
3.1.8 Work environment: 0
C-40
C, 75%RH.
3.1.9 Storage environment: -10
C-60
C, 85%RH.
3.1.10 battery
：
3V (AA1.5V
×
2)
3.1.11External dimensions: 249
（
L
）×
89
（
W
）×
38
（
H
）
mm
3.1.12Weight: About 360g (including battery’s weight)
3.2
Technical specifications
Accuracy
：
±(% r digit); calibration term is one year.
Ambient temperature: 23
C±5
C; Ambient humidity:
≤
70%RH
3.2.1 DCV
Range
Accuracy
Resolution
Input impendance
400mV
0.1mV
About 10MΩ
4V
1mV
About 10MΩ
40V
10mV
About 10MΩ
400V
±(0.8%+2d)
100mV
About 10MΩ
1000V
±(1%+3d)
1V
About 10MΩ
3.2.2 ACV
Range
Accuracy
Resolution
Input impendance
400mV
0.1mV
About 10MΩ
4V
1mV
About 10MΩ
40V
10mV
About 10MΩ
400V
±(1.2%+5d)
100mV
About 10MΩ
700V
±(1.5%+5d)
1V
About 10MΩ
Frequency
：
10Hz~1kHz (Warning
：
Frequency for square wave accuracy is specified
from 10Hz to 400Hz)
，
display
：
TRUE RMS(sinusoidal waveform RMS calibration)
。
Overload protection:250V at mV range,DC1000V or peak value AC1000V at V range
3.2.3 ACA
Range
Accuracy
Resolution
4A
1mA
40A
10mA
400A
100mA
1000A
±(2%+10d)
1A
AC Conversion Type
：
TRUE RMS responding, calibrated readings consistent with
sinusoidal waveform RMS. Frequency Range:50~60Hz
。
3.2.5 Resistance
Range
Accuracy
Resolution
400
Ω
0.1
Ω
4k
Ω
1
Ω
40k
Ω
10
Ω
400k
Ω
100
Ω
4M
Ω
±(1%+3d)
1k
Ω
40M
Ω
±(1.5%+5d)
10k
Ω
Overload protection: effective value 220V
3.2.5
Capacitance
Range
Accuracy
Resolution
10nF
±（3%+20d）
0.001nF
100nF
0.01nF
1uF
0.1nF
10uF
1nF
100uF
10nF
1000uF
±（3%+5d）
100nF
10mF
±（5%+5d）
1uF
Overload protection: effective value 250V
warning
：
There is about 20pF dead zone in the 10nF,capacitance below 20pF can
not be measured
3.2.6 Frequency
Range
Accuracy
Resolution
100Hz
0.01Hz
1kHz
0.1Hz
10kHz
1Hz
100kHz
10Hz
1MHz
100Hz
10MHz
1kHz
40MHz
±（0.5%+3d）
10kHz
Overload protection: effective value 250V. Input sensitivity RMS: effective value 1V.
NOTE:If the voltage of the frequency being measured is above 30V,set the rotary
function switch to the ACV measured function and press
“
SELECT
”
key to enter
voltage frequency measured function,in order to avoid demage the instrument.
3.2.6
DUTY
Rrange
Accuracy
Resolution
1%~99%
±（0.5%+3d）
0.1%
Overload protection: effective value 250V.
input sensitivity RMS
：
1V
3.2.8 Temperature
Range
Resolution
Accuracy
-50～300℃
1℃
±1%±5
301～1000℃
1℃
±1.9%±5
-58～600
o
F
1
o
F
±1.2%±6
601～1832
o
F
1
o
F
±1.9%±6
Temperature sensor: K WRNM- 010 bare contact thermojunction
Overload protection
：
effective value 250V.
3.2.9
Forward voltage drop of diode
Displaying approximate forward voltage values of diode. Measuring condition:
forward direct current is 1.5mA; opposite DC voltage is about 3 V.
3.2.10
Continuity Test
In the case that the resistance between two tested points is less than about
90
±20
,the buzzer will bring up sound. Test condition:Open-circuit voltage is
about 0.5V.
Ⅳ．
Operation
4.1
Instruction for control panel
（
1
）
jaws
（
2
）
Trigger
（
3
）
Rotary switch
：
This switch is used to select functions such as
current.voltage,capacitance.resistance,temperature,frequency,forward voltage drop of
diode,continuity and turn on/off the meter.
（
4
）
“SELECT” button: When press the key continuously, change the range of all
function for a proper range you need.
（
5
）
“RANGE” button: One may change the measuring range by pressing this button,
press this key to cycle from small to large range of each function
