9
Technical data
The technical data of customised versions may differ from the data in these instructions.
Please observe the informations specified on the type plate.
9.1
Characteristics VMI
Type
VMI 07
VMI 10
VMI20
Measurement device characteristics
Flow range
1…20 l/min
2…40 l/min
10…200 l/min
Accuracy *
1
pulse output
-
with analogue output
±1,5% of reading ±0,3% of full scale value
also typically ±1,25% of reading ±0,3% of full scale value
Repeatability *
1
-
with analogue output
1%
also typically ±0,1% of reading
Output signal starting from
~0,5 l/min
~1 l/min
~5 l/min
Response time
< 500 ms
Flow indication
LED green, flow proportional blinking
Output signal characteristics
Frequency output:
Pulse rate
-
optional*
2
855 pulses/l
1…2000 pulses/l
855 pulses/l
1…1000 pulses/l
200 pulses/l
1…200 pulses/l
Resolution
-
optional*
2
1,2 ml/pulse
1000…0,5 ml/pulse
1,2 ml/pulse
1000…1 ml/pulse
5 ml/pulse
1000…5 ml/pulse
Signal shape
Square wave signal • duty cycle 50:50
NPN, 2 k
Ω
pull-up resistor (built-in)
Signal current
≤
20 mA, current limited
Analogue output (optional):
Signal current
-
corresponding flow of *
3
4…20 mA
0…20 l/min
4…20 mA
0…40 l/min
4…20 mA
0…200 l/min
maximum signal current
~ 26 mA
maximum load
250
Ω
to GND
Electrical characteristics
Supply voltage
24 V
DC
±10%
Current consumption
-
with analogue output
~ 80 mA
~ 95 mA
Protection measures
short-circuit proof (up to 30 V)
protected against polarity reversal (up to -30 V)
Electrical connection
4(5)-pin plug M12x1
Degree of protection
(EN 60529)
IP 65 (with attached coupling socket)
*1 Test conditions: Water 23 °C at 300
μ
S; Standard pulse rate.
*2 factory setting. For analogue output only with standard pulse rate.
*3 other range on request.
