Technical Specifications; Insulation Resistance - Testboy Tv 455 Benutzerhandbuch

®
TV 450/455

9 Technical specifications

9.1 Insulation resistance

Insulation resistance (nominal voltages 50 V
Measuring range according to EN61557 is 0.15 M  199.9 M.
Measuring range (M)
0.00  19.99
20.0  99.9
100.0  199.9
Insulation resistance (nominal voltages 500 V
Measuring range according to EN61557 is 0.15 M  1 G.
Measuring range (M)
0.00  19.99
20.0  199.9
200  999
Voltage
Measuring range (V)
0  1200
Nominal voltages ............................... 50 V
Open circuit voltage ........................... -0 % / +20 % of nominal voltage
Measuring current .............................. min. 1 mA at R
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 if tip
commander is used.
Specified accuracy is valid up to 100 M 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.
, 100 V
DC
Resolution (M)
0.01
0.1
and 1000 V
DC
Resolution (M)
0.01
0.1
1
Resolution (V)
1
, 100 V
DC DC
N
64
Technical specification
and 250 V )
DC DC
Accuracy
(5 % of reading + 3 digits)
(10 % of reading)
(20 % of reading)
)
DC
Accuracy
(5 % of reading + 3 digits)
(5 % of reading)
(10 % of reading)
Accuracy
(3 % of reading + 3 digits)
, 250 V , 500 V
DC DC
1 k/V
=U
N
, 1000 V
DC