Besantek BST-CM270 User manual


BST-CM270
AC/DC DIGITAL
CLAMP METER
 
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

INDEX
1. INTRODUCTION.....................................
2. SAFETY NOTES......................................
3. FEATURES..............................................
4. SPECIFICATIONS...................................
5. INSTRUMENT LAYOUT..........................
6. MEASUREMENT.....................................
7. MAINTENANCE.......................................
Page
1
2
3
4-8
9-11
12-15
16




1. INTRODUCTION
NOTE


 

&RNING


-1-


-
2. SAFETY NOTES


 









 



°


 
& 
 
 
 
 
 


-
3
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3. FEATURES
●4000 - count LCD.
●Full automatic measurement.
◎Voltage measurement.
◎Current measurement.
◎Resistor measurement.
◎Capacitor measurement
◎Frequency counter.
●Range change function.
●Data Hold function freezes the reading.
●Continuity check.
●Diode measurement.
●Low battery indication.
●Auto Power Off (APO) function.
●Safety design throughout with no exposed metal parts,
shielded banana plugs and recessed input terminals.
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

-4-
4. SPECIFICATIONS
Ranges:
AC Voltage: 400 mV/4 V/40 V/400 V/750 V
AC Current: 400 A /2000 A
DC Voltage: 400 mV/4 V/40 V/400 V/1000 V
DC Current: 400 A/2000 A
Resistance: 400 Ω/4 KΩ/40 KΩ/400 KΩ/4 MΩ/40 MΩ
Continuity Test: 400 Ω
Diode : 2 V at 1mA
Capacitor: 4 nF/40 nF/400 nF/4 µF/40 µF/400 µF/
4mF
Frequency counter: 4K Hz/20K Hz
ACV
Range Resolution Accuracy (at 40-500Hz)
400 mV 0.1 mV ± (2.0% rdg+3dgt)
4 V 1 mV ± (1.5% rdg+3dgt)
40 V 10 mV ± (1.5% rdg+3dgt)
400 V 100 mV ± (1.5% rdg+3dgt)
750 V 1 V ± (1.5% rdg+3dgt)
*Overload protection : 750V AC RMS
*Frequency Response : 0~400mV at 40Hz~100Hz
4V~750V at 40Hz~500Hz
ACA
Range Resolution Accuracy
400 A 0.1 A 0~1500A: ± (1.5% rdg+4dgt)
1500~2000A: ± (2.5% rdg+4dgt)
2000 A 1 A
*Frequency Response 40Hz~500Hz

-5-
DCV
Range Resolution Accuracy
400 mV 0.1 mV ± (1.0% rdg+3dgt)
4 V 1 mV ± (1.0% rdg+3dgt)
40 V 10 mV ± (1.0% rdg+3dgt)
400 V 100 mV ± (1.0% rdg+3dgt)
1000 V 1 V ± (1.0% rdg+3dgt)
*Overload protection : 1000V DC
DCA
Range Resolution Accuracy
400 A 0.1 A 0~1500A: ± (1.5% rdg+4dgt)
1500~2000A: ± (2.5% rdg+4dgt)
2000 A 1 A
Resistance
Range Resolution Accuracy
400 Ω 0.1 Ω ± (1.5% rdg+3dgt)
4 KΩ 1 Ω ± (1.5% rdg+3dgt)
40 KΩ 10 Ω ± (1.5% rdg+3dgt)
400 KΩ 100 Ω ± (1.5% rdg+3dgt)
4 MΩ 1 KΩ ± (1.5% rdg+3dgt)
40 MΩ 10 KΩ ± (2.0% rdg+4dgt)
*Overload protection : 500V AC RMS or 500V

-6-
Continuity Test
Range Audible threshold
400 Ω Less than 25Ω
Diode Test
Range Resolution Accuracy
2 V 1 mV ± (1.5% rdg+3dgt)
Capacitor
Range Resolution Accuracy
4 nF
(30p~4nF) 1 pF
± (3.0% rdg+5dgt)
40 nF 10 pF
400 nF 100 pF
4 µF 1 nF
40 µF 10 nF
400 µF 100 nF
4 mF 1 µF ± (15% rdg+5dgt)
*Overload protection : 500V AC RMS or 500V DC
Frequency counter
Range Resolution Accuracy
4K Hz 1 Hz ± (0.5% rdg+2dgt)
20K Hz 10 Hz ± (0.5% rdg+2dgt)
*Overload protection : 500V AC RMS or 500V DC
*Trigger level : 0.2V


-












 

 











-7-


-8-
●Temperature & Humidity for Guaranteed
Operaing Temperature & Humidity
0°C to 40°C at< 80% max. relative humidity.
Storage Temperature & Humidity
-10°C to 50°C at< 80% max. relative humidity.
●Battery Life
Approx. 50 hours on continuous use.
●Accessories
Test leads
Soft pouch
Instruction Manual
Battery (one 006P 9V).
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com


5. INSTRUMENT LAYOUT
(8)
(9) 
(10)
-9-


-10-
(1) Transformer Jaws
Pick up the AC current or DC current owing through the
conductor. The "+" marking on the jaw indicates direction
of DC current existing on the conductor being tested
which follows forward and vertically with jaws, the reading
shown on display is positive.
(2) Barrier
Provide a protective distance from hands to conductor.
(3) Jaw Trigger
Press the lever to open the transformer jaws. When the
lever is released, the jaws will close again.
(4) Function selector rotary switch
The rotary switch selects the function.
(5) LCD Display
The LCD display indicates the function mode, bar graph,
annunciator, and measured value of a signal. Field effects
3 ¾ digit LCD with maximum reading of 3999.
(6) Volt/Ohm/Frequency Terminal
This is positive input terminal for voltage / ohm /
frequency measurement. Use the RED test lead to
connect.
(7) COM Terminal
This is the ground input terminal. Use the BLACK test
lead to connect.
(8) Select Button
In the resistance + continuity + diode function, press the
Select button to selects resistance, Continuity or diode
function.

-11-
(9) Range Button
Press the Range button to selects the manual range
mode and turns off the AUTO annunciator and turns on
the manual annunciator and changes the full scale range.
In manual range mode, each time press Range button
(less than one second), the range increments and a new
value is displayed. To exit the manual range mode and
return to auto mode, press the RANGE button (More than
one second).
(10) HOLD Button
Press the HOLD button (HOLD annunciator turns on)
makes the meter stop updating the LCD display. This
mode can be nested in most of the special modes.
Enabling HOLD function in automatic mode makes the
meter switch to manual mode, but the full scale range
remains the same. HOLD function can be cancelled by
changing the measurement mode, pressing Range, or
push HOLD again.
(11) DCA zero adjust shaft
(12) Auto Power Off (APO)
The meter has a default auto power off function (APO
annunciator turns on). If the meter idles for more than
10 minutes, the meter automatically turns the power off.
When this happens, the state of the meter is saved. In
order to disable auto power off function, power on the
meter when any of the push function, except for HOLD, is
pressed down.




6. MEASUREMENT


 
 


  



* 


 


 
  

* 
 





 

 


X
 
 
*
 




 

  
 















 

 







 




-15-
(7) Frequency measurement
Switch to frequency measurement mode. Insert the
BLACK test lead to COM and the RED one to the other
terminal. Apply the test leads to the points across which
the frequency is to be measured, and read the result
directly from the display.
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com




7. MAINTENANCE

 

 

  


&WARNING


 

 




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CAT IV - Is for measurements performed at the source of
the low voltage installation.
CAT III - Is for measurements performed in the building
installation.
CAT II - Is for measurement performed on circuits directly
connected to the low voltage Installation.
CAT I - Is for measurements performed on circuits not
directly Connected to Mains.
Due to our policy of constant improvement and development,
we reserve the right to change specications without notice.
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com