Testboy TV 455VDE-tester Testboy TV 455 Manuale Utente

 

 
Insulation resistance (nominal voltages 50 V

DC

, 100 V

DC 

and 250 V

DC

) 

Measuring range according to EN61557 is 0.15 M

Ω ÷ 199.9 MΩ. 

Ω) Resolution 

Ω) 

0.00 

÷ 19.99 

0.01 

±(5 % of reading + 3 digits)

20.0 

÷ 99.9 

±(10 % of reading) 

100.0 

÷ 199.9  

0.1 

±(20 % of reading)  

 
Insulation resistance (nominal voltages 500 V

DC

 and 1000 V

DC

) 

Measuring range according to EN61557 is 0.15 M

Ω ÷ 1 GΩ. 

Ω) Resolution 

Ω) 

0.00 

÷ 19.99 

0.01 

±(5 % of reading + 3 digits)

20.0 

÷ 199.9 

0.1 

±(5 % of reading) 

200 

÷ 999 

1 

±(10 % of reading) 

 
Voltage 

0 

÷ 1200 

1 

±(3 % of reading + 3 digits)

 
Nominal voltages ...............................50 V

DC

, 100 V

DC

, 250 V

DC

, 500 V

DC

, 1000 V

DC

 

Open circuit voltage ...........................-0 % / +20 % of nominal voltage 
Measuring current..............................min. 1 mA at R

N

=U

N

×1 kΩ/V 

Short circuit current........................... max. 3 mA 
The number of possible tests............ > 1200, with a fully charged battery 
Auto discharge after test. 
Specified accuracy is valid if 3-wire test lead is used while it is valid up to 100 M

Ω if tip 

commander is used. 
Specified accuracy is valid up to 100 M

Ω if relative humidity > 85 %. 

In case the instrument gets moistened, the results could be impaired. In such case, it is 
recommended to dry the instrument and accessories for at least 24 hours. 
The error in operating conditions could be at most the error for reference conditions 
(specified in the manual for each function) 

±5 % of measured value.