Tam Position Transmitter (Option); Maintenance And Storage Instructions - Bernard Controls oa Anleitung Für Die Inbetriebnahme, Lagerung Und Wartung

Drive the actuator to the open position and write down the resistance
value corresponding to the 100% position.
Come back to the closed position and check that, for the 0% position,
the resistance shows a close to zero repeatable value.
Note: If actuator is equipped with 2 potentiometers, each potentiometer
is set independently of the other.
Signal inversion:
To inverse the signal variation direction, invert potentiometer wires
on the actuator terminal board (e.g. for a connection on 16/17/18, invert
16 and 18).
8 «taM» position transMitter (option)
The TAM transmitter delivers a 0/4 to 20 mA signal linearly proportional
to the angular position of the valve.
Electric connections
Refer to the wiring diagram supplied with the actuator. See also some
typical wiring examples below.
Filtered or stabilised power supply should be provided within the 12 to
32 VDC range.
Maximum admissible ohmic load values are given in the table :
Energy Supply
DC (VOLT)
Signal direction inversion
The TAM transmitter, when supplied with a standard actuator, provides
a signal that rise from close position to open position, the standard
opening direction being counter-clockwise.
If an opposite signal variation is required, simply move 2 jumpers on the board
near the potentiometer.
Direct signal : jumpers on 1-3 and 2-4
Reversed signal : jumpers on 1-2 and 3-4
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Max. admissible
load Ohm
12 150
24 750
30 1050
Settings
Connect a milliampermeter at the place of burden.
- Always start by adjusting the 0/4mA.
- Drive actuator to the position corresponding to the 0/4 mA (closed
in standard),
- Hold the pinion located just under the plate with the «0% position»
marking while driving the potentiometer screw. Adjust the poten-
tiometer so that the output current reaches a minimum value. Turn
backwards until the current value regularly increases then turn
backwards again and stop as soon as the minimum value determined
here above has been reached.
The potentiometer is then positioned at the very beginning of its track.
- Then, use the TAM adjustment screw marked as «0/4mA» to adjust
the current to a value as close to the 0/4 mA as possible.
- Drive actuator to the position corresponding to the 20 mA (open
in standard),
- Turn the screw marked «20mA» in order to read exactly 20 mA
on the milliampermeter.
- Come back to the closed position and check that, for the 0% position,
the signal current shows a close to 0/4 mA and repeatable value.

9 Maintenance anD storage instructions

Maintenance
If actuator is correctly mounted and sealed, no special maintenance
is required. Check once a year function of motor and make sure that
switch compartment is condensation free. If environment is humid, we
recommend installation of an anti-condensation heater resistance and/
or breathers, thus protecting electric parts from alteration.
Actuators are lubricated with grease for about 100.000 operations. If the
grease requires to be renewed, use one of the products listed hereafter.
NOTE : When renewing the grease, first remove the integrality of the
old one.
General characteristics of lubricant ; grease specifications only (not ac-
tuator) given for standard duty conditions :
• Grease duty temperature : -30°C to +135°C,
• Penetration ASTM at +25°C : 265/295,
• Drop point : +180°C.
eQuivalent grease table
TOTAL SHELL
MULTIS COMPLEX EP2 ALVANIA EP2 MObILUX EP2
(normal conditions)
MObIL ESSO
bEACON EP2
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