ELECTRICAL SAFETY TESTER 
USER MANUAL 
 
 
 9 
3. PRECAUTIONS BEFORE OPERATION 
3-1. Unpacking the instrument 
The product has been fully inspected and tested before shipping 
from the factory. Upon receiving the instrument, please unpack and 
inspect it to check if there is any damage caused during 
transportation. If any sign of damage is found, notify the bearer 
and/or the dealer immediately. 
 
3-2. Safety Notice 
Working place 
The working place must be isolated and when the high voltage is 
proceeding, it should be alerted with a warning sign of dangerous 
for special caution. 
Checking the Line Voltage 
The instruments can be applied with any kind of line voltage shown 
in the table below. Before connecting the power plug to an AC line 
outlet, make sure the voltage selector of the rear panel is set to the 
correct position corresponding to the line voltage. It might be 
damaged the instrument if connected to the wrong AC line voltage. 
 
WARNING. To avoid electrical shock the power cord 
protective grounding conductor must be connected to 
ground. 
 
The equipment shall not be used for measurements 
within category II, III and IV. 
 
 
 
ELECTRICAL SAFETY TESTER 
USER MANUAL 
 
 
 10
When line voltages are changed, replace the required fuses shown as 
below: 
 
Line voltage Range
 
Fuse
 
Line voltage Range
 
Fuse
 
100V 
120V 
90-110V
108-132V
T 7.0A 
250V
220V 
230V 
198-242V
207-250V
T 4A   
250V 
 
WARNING. To avoid personal injury, disconnect the 
power cord before removing the fuse holder. 
 
Operator’s Precaution 
(1) With immense high output voltage and current of the puncture 
tester, only qualified person can operate the tester in order to 
avoid fatal electric shock. 
(2) On-job training is required for operator to better use the tester 
smoothly and safely. 
(3) The operator is prohibited to dress with metal ornaments or wear 
metal decoration in order to avoid electric shock. 
(4) The person with cardiac or wear a pacemaker must not to operate 
the tester. 
 
WARNING: This is a Class A product. In a domestic 
environment this product may cause radio 
interference in which case the user may be required 
to take adequate measures.