Bender ISOMETER IRDH375 User Manual

Technical data IRDH375(B)
80
IRDH375_D00124_05_M_XXEN/01.2020
Measuring circuit
Measuring voltage U
m
........................................................................................................................................ ≤ 40 V
Measuring current I
m
max. (at R
F
= 0 Ω)...................................................................................................... ≤ 220 μA
Internal DC resistance R
i
.................................................................................................................................. ≥ 180 kΩ
Internal impedance Z
i
, at 50 Hz....................................................................................................................... ≥ 180 kΩ
Permissible extraneous DC voltage U
fg
..................................................................................................... ≤ DC 1200 V
Permissible system leakage capacitance C
e
................................................................................................... ≤ 500 μF
Factory setting....................................................................................................................................................... 150 μF
Displays
Display, illuminated .............................................................................................................................. two-line display
Characters (number of characters)....................................................................................................................... 2 x 16
Display range , measuring value ............................................................................................................ 1 kΩ…10 MΩ
Operating uncertainty (20 kΩ…1 MΩ) (acc. to IEC 61557-8:2007-01) .................................................... ±15 % **
Operating uncertainty (1 kΩ…20 kΩ)............................................................................................. ±1 kΩ
/ ±15 % **
Operating uncertainty (1 MΩ…10 MΩ).................................................................................... ±0.1 MΩ/±15 % **
** = under test conditions in accordance with IEC 61326-2-4, the tolerances may double
Outputs/inputs
TEST/RESET button .............................................................................................................................. internal/external
Cable length TEST/RESET button external ..........................................................................................................≤ 10 m
Current output for measuring instrument SKMP (scale centre point = 120 kΩ):..........................................................
Current output IRDH375 (load) ...................................................................................................... 400 μA (≤ 12.5 kΩ)
Current output IRDH375B (load)........................................................................................................ 20 mA (≤ 500 Ω)
Accuracy current output (1 kΩ…1 MΩ)
in relation to the displayed measured value ........................................................................................ ±10 %, ±1 kΩ
Serial interface
Interface / Protocol IRDH375...................................................................................................... RS-485/ASCII-IsoData
Interface / Protocol IRDH375B................................................................................................................... RS-485/BMS
Connection ................................................................................................................................................ terminals A/B
Cable length .................................................................................................................................................. ≤ 1,200 m
Recommended cable (screened, screen on one site connected to PE)................................................ J-Y(St)Y 2 x 0.6
Terminating resistor................................................................................................................................. 120 Ω (0.5 W)
Device address, BMS bus .................................................................................................. 1…30 (factory setting = 3)

Bender ISOMETER IRDH375 Specifications

General

Brand	Bender
Model	ISOMETER IRDH375
Category	Measuring Instruments
Language	English