Testboy TV 455 - Resistance to Earth; Voltage, Frequency, and Phase Rotation; Phase Rotation; Voltage

®
TV 450/455 Technical specification
70
9.6 Resistance to earth
Measuring range according to EN61557-5 is 2.00 Ω ÷ 1999 Ω.
Measuring range (
Ω) Resolution (Ω)
Accuracy
0.00 ÷ 19.99
0.01
20.0 ÷ 199.9
0.1
200 ÷ 9999
1
±(5% of reading + 5 digits)
Max. auxiliary earth electrode resistance R
C
... 100×R
E
or 50 kΩ (whichever is lower)
Max. probe resistance R
P
................................ 100×R
E
or 50 kΩ (whichever is lower)
Additional probe resistance error at R
Cmax
or R
Pmax.
±(10 % of reading + 10 digits)
Additional error
at 3 V voltage noise (50 Hz) ............................ ±(5 % of reading + 10 digits)
Open circuit voltage ......................................... < 15 VAC
Short circuit voltage ......................................... < 30 mA
Test voltage frequency .................................... 125 Hz
Test voltage shape .......................................... rectangular
Noise voltage indication threshold ................... 1 V (< 50 Ω, worst case)
Automatic measurement of auxiliary electrode resistance and probe resistance.
Automatic measurement of voltage noise.
9.7 Voltage, frequency, and phase rotation
9.7.1 Phase rotation
Nominal system voltage range ......... 100 V
AC
÷ 550 V
AC
Nominal frequency range.................. 14 Hz ÷ 500 Hz
Result displayed ............................... 1.2.3 or 3.2.1
9.7.2 Voltage
Measuring range (V) Resolution (V) Accuracy
0 ÷ 550
1
±(2 % of reading + 2 digits)
Result type........................................ True r.m.s. (trms)
Nominal frequency range.................. 0 Hz, 14 Hz ÷ 500 Hz
9.7.3 Frequency
Measuring range (Hz) Resolution (Hz) Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 499.9
0.1
±(0.2 % of reading + 1 digit)
Nominal voltage range...................... 10 V ÷ 550 V