3 ELECTRICAL CONNECTIONS
Manual ERZ2000-DI · EN1.2 · 2017, December 21st
84
3.1.6
Connections
3.1.6.1
Input characteristics
2-channel HF volume flow input with pulse metering and frequency measure-
ment
The appropriate frequency input must be selected in this menu; Inputs 5, 6, 7 and
8 offer higher resolution.
Channel 1: Volume measuring channel HF input
Measuring range
0.10 Hz to 6.0 kHz
Accuracy
0.01 Hz
U hys
1.0 V
U trg
3.0 V
Overvoltage protec-
tion
6.8 V with external module
18.0 V with internal module (galvanically isolated)
Channel 2: Volume comparison channel HF input
Same data as for Channel 1
2-channel LF volume flow input with pulse metering and frequency measure-
ment
Channel 1: Volume measuring channel LF input
Measuring range
0.00 Hz to 6.0 kHz
Accuracy
0.01 Hz
U hys
1.0 V
U trg
3.0 V
Overvoltage protec-
tion
6.8 V with external module
18.0 V with internal module (galvanically isolated)
Channel 2: Volume comparison channel LF input
Same data as for Channel 1
Volume input for digitally operating Vo totalizer
Data transmission between the gas volume meter and flow computer take place
unidirectionally and reactionless via a shielded, twisted pair of wires from the me-
ter to the flow computer. The electrical characteristic data conforms to DIN 19234
(NAMUR).
