Technical Data; Characteristics Vvx - Sika VVX Betriebsanleitung

VVX
8

Technical data

The technical data of customised versions may differ from the data in these instructions.
Please observe the information specified on the type plate.

8.1 Characteristics VVX

Type
Measurement device characteristics
Measuring range
Accuracy
Repeatability
Output signal characteristics
Flow frequency output (optional):
Pulse rate / K-factor
optional:
Signal shape
Signal current
Flow analogue output 0.5...3.5 V (optional):
Output signal
*4
Scaling
Voltage rate
Signal current
Flow voltage and current output (optional):
Output signal
*4
Scaling
Voltage / current rate
- 0...10 V
- 4...20 mA
Signal current
Working resistance
Temperature (optional):
• Sensor directly
• Analogue output
*1) Test conditions:
Test medium water • Medium temperature 20...30 °C • Defined inlet and outlet pipes ( p. 23).
*2) Resolution 7 bit or 10 bit (depending on version).
*3) Resolution 12 bit.
*4) other scales possible.
*5) Dual slope measurement method with basic accuracy ±0.5 K.
*6) Dual slope measurement method with basic accuracy ±1.0 K.
Technical changes reserved
VVX15 VVX20
2...40 l/min 5...80 l/min
±1 % at -20...5 °C ambient temperature
±0.5 % at 5...70 °C ambient temperature
500 pulses/l 200 pulses/l
3...1,000 1...800
pulses/l pulses/l
Square wave signal • duty cycle 50:50
NPN open collector (o.c.), PNP o.c. or push-pull
2...40 l/min 5...80 l/min
0.07895 V / 0.04000 V /
l/min l/min
0...40 l/min 0...80 l/min
0.25000 V / 0.12500 V /
l/min l/min
0.40000 mA / 0.20000 mA /
l/min l/min
≤ 125 Ω at max. 24 V signal voltage
Pt1000 (2-wire, class B) or NTC (R
*2
0.5...3.5 V corresponds to 0...90°C with (Pt1000
VVX25
7...150 l/min 12...250 l/min 22...400 l/min
*1
±2% of range
100 pulses/l
1...500
pulses/l
≤ 20 mA
*2
0,5...3,5 V
7...150 l/min 12...250 l/min 22...400 l/min
0.02098 V /
l/min
≤ 1 mA
0...10 V • 4...20 mA
0...150 l/min 0...250 l/min
0.06667 V /
l/min
0.10667 mA / 0.06400 mA /
l/min
≤ 1 mA
(Voltage output)
=10.74 kΩ, B 0/100 3450)
25
Technical data
VVX32 VVX40
100 pulses/l 50 pulses/l
-/- -/-
0.0126 V / 0.0079 V /
l/min l/min
*3
0...400 l/min
0.04000 V / 0.02500 V /
l/min l/min
0.04000 mA /
l/min l/min
(Current output)
*5 *6
or NTC )
- 33 -