Bender ISOMETER isoCHA425 Kurzanleitung Seite 24

Measuring circuit
Measuring voltage U
...........................................................................................................................................±12 V
m
Measuring current I at R
m
Internal resistance R , Z
i i
Permissible system leakage capacitance C
Response values
Response value R ................................................................................................................. R
an1
Response value R
..................................................................................................................... 5 kΩ...R
an2
Operating uncertainty R
Hysteresis R
................................................................................................................................... 25 %, at least 1 kΩ
an
Undervoltage detection ............................................................................................................ 10 V...U> (off/10 V)*
Overvoltage detection........................................................................................................... U<...500 V (off/500 V)*
Operating uncertainty U................................................................................................................. ±5 %, at least ±5 V
Hysteresis U .......................................................................................................................................... 5 %, at least 5 V
Time response
Response time t at R = 0.5 x R
an F
Start-up delay t ..................................................................................................................................... 0...10 s (0 s)*
Response delay t
................................................................................................................................ 0...99 s (0 s)*
on
Delay-on release t
.............................................................................................................................. 0...99 s (0 s)*
off
Displays, memory
Display..................................................................................................... LC display, multi-functional, not illuminated
Display range measured value insulation resistance (RF) ........................................................................ 1 kΩ...2 MΩ
Operating uncertainty.................................................................................................................±15 %, at least ±2 kΩ
Display range measured value nominal system voltage (Un) ................................................................0...500 V
Operating uncertainty.....................................................................................................................±5 %, at least ±5 V
Display range measured value system leakage capacitance RF > 20 kÙ .................................................... 0...17 μF
Operating uncertainty............................................................................................................... ±5 %, at least ±0.1 μF
Password ...................................................................................................................................... off/0...999 (0, off)*
Fault memory alarm messages ....................................................................................................................... on/(off)*
24
, Z
= 0................................................................................................................ ≤ 110 μA
F F
....................................................................................................................................≥ 115 kΩ
for an insulation value ≤ 300 kΩ .................................................. ≤ 2 μF
e
.......................................................................................................... ±15 %, at least ±2 kΩ
an
and C
=1 μF acc. to IEC 61557-8 ................................................................ ≤ 1 s
an e
isoCHA425_D00352_00_Q_DEEN/04.2018
...250 kΩ (46 kΩ)*
an2
(23 kΩ)*
an1
RMS