Test Equipment Depot BST-CM273 User manual

1000A
CAT.Ⅲ 600V
AC V
OFF
AC A
DC V
DC A
A ZERO
COM
V
AC
000
V
MAX
600V
HOLD
Ω
Ω
MAX
CAT.Ⅲ
AC/DC CLAMP METER
AC/DC CLAMP METER
BST-CM273
INSTRUCTION MANUAL
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
4-6
7-8
9-11
12

-1-
1. INTRODUCTION
NOTE
This meter has been designed and tested according
to CE Safety Requirements for Electronic Measuring
Apparatus, EN61010-1, EN 61010-2-32 and other safety
standards. Follow all warnings to ensure safe operation.
WARNING
READ "SAFETY NOTES" (NEXT PAGE) BEFORE
USING THE METER.

-2-
2. SAFETY NOTES
Read the following safety information carefully before
attempting to operate or service the meter.
● Use the meter only as specied in this manual,
otherwise the protection provided by the meter may be
impaired.
●Always keep hands behind the meter barrier.
●Use extreme caution when clamping around uninstalled
conductors or bus bars.
●Never clamp around any conductor carrying a voltage
above 600V R.M.S.
●Rated environmental conditions:
1.Indoor use.
2.Installation Category III.
3.Pollution degree II.
4.Altitude up to 2000 Meter.
5.Relative Humidity 80% Max.
6.Ambient Temperature 0~40°C.
●Observe the international Electrical Symbols listed
below:
Meter protected throughout by double insulation
or reinforced insulation.
Warning ! Risk of electric shock.
Caution ! Refer to this manual before using the
meter.
Alternating current.
Earth (ground) terminal.

-3-
3. FEATURES
●Full Autorange for all functions.
●Data Hold function freezes the reading.
●Max Hold function holds the absolutely maximum of
readings.
●LCD backlight function.
●Flashlight function.
●Low battery indication.
●Safety design throughout with no exposed metal parts,
shielded banana plugs and recessed input terminals.
●The Ohm function is ideal for checking continuity of
relays, transformers and motor coils.
●Diode check function.

-4-
4. SPECIFICATIONS
Ranges:
AC Voltage: 400/600 V
AC Current: 400/1000 A
DC Voltage: 400/600 V
DC Current: 400/1000 A
Resistance: 400/2000 Ω
Diode : 400/2000 mV at 1mA
ACV
Range Resolution Accuracy
400V 0.1V ±(1.0%rdg+3dgt)
600V 1V
ACA
Range Resolution Accuracy
400A 0.1A ±(1.5%rdg+3dgt)
1000A 1A
*Frequency Response 40Hz~500Hz
DCV
Range Resolution Accuracy
400V 0.1V ±(0.75%rdg+3dgt)
600V 1V

-5-
DCA
Range Resolution Accuracy
400A 0.1A ±(1.5%rdg+3dgt)
1000A 1A
Resistance
Range Resolution Accuracy
400Ω 0.1Ω ±(1.0%rdg+3dgt)
2000Ω 1Ω
*Buzzer sounds below 38.0Ω
●Overload protection
ACV 750V rms.
DCV 1000V.
Diode & Ohm 600V rms.
●Conductor Size
Approx. 40mm Max.
●Operating Principle: Dual slope integration.
●Over Rage Indication: "O.L" indicated.
●Low Battery Indication: " " sign appears on the
display.
●Response Time:
Approx.1 second.

-6-
●Sample Rate:
Approx.2 times per second.
●Temperature & Humidity for Guaranteed
0°C~40°C at 80% max. relative humidity.
●Storage Temperature & Humidity:
-10°C~50°C at 80% max. relative humidity.
●Dimensions
255(L) x 80(W) x 35(D)mm.
●Weight
Approx. 420g (battery included).
●Power Source
9V (6F22) x 1.
●Accessories:
Test leads.
Soft pouch.
Instruction manual.
9V (6F22) x 1.

-7-
5. INSTRUMENT LAYOUT
1000A
CAT.Ⅲ 600V
AC V
OFF
AC A
DC V
DC A
A ZERO
COM
V
AC 000
V
MAX
600V
HOLD
Ω
Ω
MAX
CAT.Ⅲ
AC/DC CLAMP METER
(1)
(2)
(4)
(8)
(7)
(6)
(5)
(9)
(3)

-8-
(1) Transformer Jaws
Pick up the conductor within the jaws center.
(2) Barrier
Provide a protective distance from hands to conductor.
(3) Jaw Trigger
Press to open the jaws.
(4) DCA zero adjustment shaft
(5) LCD Display
3¾ digit LCD with the maximum reading of 3999.
(6) Input Terminals
(7) Function Switch
(8) Max Button
Hold the absolute maximum of readings with " "
indicated.
(9) Data Hold Button
Freeze the reading for all ranges with " "
indicated.
MAX
HOLD

-9-
6. MEASUREMENT
Before proceeding with measurement, read the safety
notes.
(1) AC Voltage measurement
●Insert the BLACK test lead to COM and the RED
one to the other terminal.
●Set the function switch to ACV.
●Connect the test leads to the object to be
measured.when measuring AC voltage, the polarity
of the leads can be ignored.
●Read the display.
(2) DC Voltage measurement
●Insert the BLACK test lead to COM and the RED
one to the other terminal.
●Set the function switch to DCV.
●Connect the test leads to the object to be measured.
●Read the display.
※ Reversing the polarity of the test leads displays a
negative value.

-10-
(3) AC Current measurement
●Set the function switch to ACA.
●Press the jaw trigger to open the transfomer jaw
and clamp onto one conductor only.
●Read the display.
(4) DC Current measurement
●Set the function switch to DCA.
※ If the inital reading of DCA is not zero, adjust
the "DCA zero adjustment shaft" until the
display shows zero.
●Press the jaw trigger to open the transfomer jaw
and clamp onto one conductor only.
●Read the display.
+-
O X
LOADLOAD LOADLOAD



1000A
CAT.Ⅲ 600V
ACV
OFF
ACA
DCV
DCA
A ZERO
COM
V
AC 000
V
MAX
600V
HOLD
Ω
Ω
MAX
CAT.Ⅲ
AC/DCCLAMP METER
1000A
CAT.Ⅲ 600V
ACV
OFF
ACA
DCV
DCA
A ZERO
COM
V
AC 000
V
MAX
600V
HOLD
Ω
Ω
MAX
CAT.Ⅲ
AC/DCCLAMP METER

-11-
(5) Resistance & Diode measurement
CAUTION!
Make sure that there is no voltage in the circuit or
components being measured.
For resistance test:
●Insert the BLACK test lead to COM and the RED
one to the other terminal.
● Set the function switch to Ω.
●Connect the test leads to the object to be measured.
●Read the display.
For Diode test:
●Connect the test leads to the diode for testing.
●Read the forward Voltage of diode directly from the
display.
※ Reversing the polarity of the test leads displays
O.L.

-12-
7. MAINTENANCE
Battery Replacement:
When the low battery warning sign appears, replace with
a new battery as follows:
(1) Disconnect the test leads from the clamp meter and
turn off the power.
(2) Unscrew the battery cover and replace with a new
Battery.
Cleaning and Storage:
Periodically wipe the case with a damp cloth and
detergent. Do not use abrasives or solvents.
If the meter is not to be used for a long time over 60
days, please remove the battery for storage.
WARNING
To avoid electrical shock or damage to the meter, do
not get water inside the case.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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