Description and connection of the pick-ups
VTR
- 22 -
© SIKA
•
Ea-4400
•
01/2019
4
Description and connection of the pick-ups
Rotation of the turbine rotor is detected either via an inductive pick-up or via a magnetic pre-
stressed Hall sensor. The pick-up is screwed into the turbine meter casing, but does not ex-
tend into the turbine and, therefore, does not have to be sealed.
The following versions are available:
Type
Screw-in
thread
Adapter
Output
frequency signal
Elec. con-
nection
Type of connector
VISPP
5/8–18UNF
without
Sinus
2-pole
Amphenol MS10SL3102
VISPP-HT
5/8–18UNF
without
Sinus
2-pole
Amphenol, MS-3106A-
10SL-4-S
VSAPPS /
VSAPPSHT
M12x1
VT1140
Square-wave
NPN or PNP
3-pole
4-PIN, M12x1
4.1
Installation and connection of pick-up types VISPP and VISPP-HT
The output signal of the VISPP and VISPP-HT (high temperature) pick-up is a sinusoidal pulse
signal. The signal voltage depends on the rotational speed and varies between 10 and
200 mV. A voltage supply is not required.
Manually screw the pick-up into the turbine meter receiver until the limit
stop. Subsequently use the counter nut to fix the pick-up.
Solder the connection cable to the connector and screw on the strain relief.
Important:
We recommend the use of shielded connection cables
only. Connect the shield on one side at the evaluating
device to earth.
Functional test:
Pick-up functioning can be tested by measuring the re-
sistance between the two connecting cables. It should be approx. 1...1.5 K
Ω
. In-
ductivity is approx. 460 mH.
Connector
assignment
