KROHNE ALTOFLUX 2W IFM 4042K EN User Manual

Page 36

Section 5.3

Part C Technical data, Block diagram and Measuring principle

ALTOFLUX 2W

02/2001

5.3

IFC 040 Signal converter

Current output
Function

• all operating data configurable
• for passive mode
• standard HART

communication

4-20 mA
for Q = 0%

= 4– 14 mA

for Q > 100%

100%

= 10– 20 mA

adjustable in
0.1 mA increments

Current:

fixed ranges
variable ranges

for Q = 100%

max

= 21 mA

Current:

fixed ranges
variable ranges

4-20 mA

for Q = 0%

Binary output
Function

• used as pulse or status output
• all operating data configurable

• galvanically isolated from current output and all

input circuits

Passive mode

Selectable according to NAMUR (DIN 19 234)
or as contact:
• open

• open

• closed

Pulse output

digital pulse division, interpulse period non-uniform,
therefore if frequency and cycle meters connected
allow for minimum counting interval:

gate time, counter

≥

[ ]

100%

pulse width 30 – 1000 ms
(adjustable in 10 ms increments)

Status output

configurable as measuring range identification for
automatic range change, indicator for flow direction,
overflow, errors, trip point or empty pipe indication

Time constant

0.5 – 99.9 s, adjustable in 0.1 s increments

Low-flow cutoff

cutoff “on“ value: 1 – 19%

cutoff “off“ value: 2 – 20%

cutoff “on“ value: 1 –
19%
cutoff “off“ value: 2 –
20%