Signal converter vfc 090 – KROHNE VFM 5090 EN User Manual
Page 64
Signal Converter VFC 090
Full scale range
programmable in litres, m
3
, US/UK gallons, kg, tonnes, lbs, cub ft or standard
flow rate per second, minute or hour
Power Supply
Power Consumption
240/220/200/120/110/100 V AC + 10%
- 15%
230 V AC + 6%
- 10%
AC: 15 VA
} 48 to 63 Hz
Ambient temperature Tu
see diagram IV, page 59
Local display
3-field back-lit LCD
Display functions
actual flowrate and sum totalizer (8-digit), each programmable for continuous or
sequential display of measured parameters and error messages
Display units
Actual flowrate
Units list as per full scale range or % of full scale independently programmed
Totalizer liters,
m
3
, US/UK gallon, kg, tonnes, lbs, cub. ft.
Language of plain texts
German, English, French.
Display
1
st
field (top)
8 digit, 7-segment numeric display, symbols for key acknowledgement
2
nd
field (middle)
10-character, 14-segment text display
3
rd
field (bottom)
6 markers
t to identify actual display
Mass flow measurement
manual through keyboard or on-line with optional integrated temperature and
pressure sensors
Housing, signal converter
with separate connection compartment
Material die-cast
aluminium
Protection category
(EN 60529/IEC 529)
IP 65 & IP 67(better than NEMA 4 & 4X)
Current output
Operating data programmable, galvanically
isolated (not from frequency output)
Current
0/4 to 20 mA corresponding to flow values
independently programmable with min. span equal to 20% of full scale.
Accuracy
± 0.1% of FS
Temp. coefficient
100 ppm of fullscale range per 1
0
C.
Max. load at I
100%
(20 mA)
700
W
Error annunciation
I error = 2/22 mA programmable
Frequency output
operating data programmable, galvanically isolated (not from current output)
Pulse rate for q = 100%
10 to 36000000 pulse per hour
0.167 to 600000 pulses per minute
0.0028 to 10000 pulses per second (=Hz)
optionally in pulses per litre, m
3
, US/UK gallon, kg, tonne, lb, cub. ft.
Active output
short-circuit-proof suitable for electromechanical (EMC)
OR electronic (EC) totalizer
Amplitude max.
24V.
Load rating
see Table “pulse width” on page 61
Passive output
open collector for connection of active electronic totalizers
(EC) or switchgear
Input voltage (external supply)
5 to 24V
Load current
max. 100 mA
Ri 100
ohms.
Accuracy
Frequency output mode : +/- 0.3% of value.
Pulse output mode : 0% (no additional error)
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