Installation on pipe
1. Clean all lines.
Do not use cleaning wool.
Pickle and flush welded pipes.
2. Remove the protective plugs.
3. Mount the lines.
Comply with the manufacturer's information.
Do not use any sealing materials such as hemp, Teflon tape or putty.
4. After the gearwheel flow meter is installed and the piping system is placed back in
service, check all connections for leakage.
Electrical connection
Preamplifier
A 24V (DC) line (± 20 %) must be provided to supply power to the pre-amplifier.
The terminal assignment for channel 1 or 2 has an influence on the displayed direction of
rotation of the gearwheels, and thus on the preceding sign (+ or -) that is used when dis -
playing the measured volumetric flow rate on the evaluation device.
Number of measuring channels
2
Operating voltage
U
B
= 24 V
DC
+/- 20%, protected against
polarity reversal
Pulse amplitude
U
A
>/= 0,8 U
B
Pulse from with symmetric output signal
Square-wave pulse, scanning ratio/channel
1:1 +/- 15 %
Pulse offset between both channels
90° +/- 30°
Power consumption
P
b max
= 0,9 W
Output power / channel
P
a max
= 0,3 W, short circuit proof
Protection type
IP65 (DIN 40500)
Attention:
Damage by overvoltage
Excessive voltage can cause damage and dysfunction to the product.
a) Use the product only with the correct voltage.
b) Please consult the manufacturer in cases of doubt.
The power supply line must match the used preamplifier.
DV04 Instruction manual 02/2021
page 7