Besantek BST-LT03, BST-LT04 Instruction Manual

DIGITAL AC LEAKAGE

CLAMPMETER

BST-LT03

INSTRUCTION MANUAL

Index

1. Introduction........................................

2. Safety Notes.......................................

3. Features.............................................

4. General...............................................

5. Specications.....................................

6. Instrument Layout...............................

7. Operation............................................

8. Maintenance.......................................

Page

1-3

3-4

4-6

6-7

8-9

10-12

12-18

18

Due to our policy of constant improvement and development, we

reserve the right to change specications without notice.

-1-

1. Introduction

NOTE
This meter has been designed and tested According
to IEC Publication 348, Safety Requirements for
Electronic Measuring Apparatus, IEC-1010 (En61010)
and other safety standards. Follow all warnings to
ensure safe operation.

DANGER is reserved of conditions and actions
that are likely to cause serious or fatal injury.

WARNING is reserved for conditions and actions
that can cause serious or fatal injury.

CAUTION is reserved for conditions and actions
that can cause bodily injury or instrument
damage.

WARING

● Read through and understand instructions
contained in this manual before starting using
the instrument.

● Save and keep the manual handy to enable
quick reference whenever necessary.

● In order to avoid injury, or damage to the
instrument or the circuit under test, be sure
to understand and follow all safety instructions
contain in the manual.

-2-

● Be sure to use the instrument only in its

intended applications and to follow measurement
procedures described in the manual.

DANGER

● Never make measurement on a circuit above
600 VAC.

● Do not attempt to make measurement in the

 presenceofammablegasses,fumesvapour 

or dust. Otherwise, the use of the instrument
may cause sparking, which can lead to an
explosion.

● Transformer jaw tips are designed not to short
the circuit under test. If equipment under test
has exposed conductive parts, possibility of
shorting.

● Never open the battery compartment cover
when making measurement.

● Never attempt to use the instrument if its
surface or your hand is wet.

● Do not exceed the maximum allowable input of
any measurement range.

-3-

※

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 measurements performed on

circuits directly connected to the low

-voltage installation.

CAT I - Is for measurements performed on

circuits not directly connected to
mains.

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.

-4-

● Rated environmental conditions:

a. Indoor use.
b. Installation category III.
c. Pollution degree II.
d. Altitude up to 2000 meter.
e. Relative humidity 80% max.
f. 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.

Application around and removal from hazardous
live conductors is permitted.

3. Features

The meter is a unique digital clamp meter for both
very low current and high current measurements.
Its shielded transformers jaws minimizes the effect

ofexternalstraymagneticeld,enablingleakage

current measurements.