Setting The Beginning And End Of The Measuring Range; Adaptation From 2-Wire Connection To 3 Or 4-Wire Connection And Vice Versa; Reversing The Rotation For Instruments With Measuring Ranges 150 - Camille Bauer WT707 Mode D'emploi

8. Setting the beginning and end
of the measuring range
The coarse adjustment of the beginning of the measuring
range consists in aligning the zero of the measured device
with the external zero mark on the transmitter. The procedure
was described in Section 6 "Mounting". This Section concerns
the fine adjustment not only of the beginning of the range
(ZERO), but also of the end of the scale (SPAN).
Firstly, switch on the power supply to the transmitter.
For versions ...
... with plug-in connector remove the ZERO/SPAN sealing
screws (2.2) (Fig. 12, left).
... with screw terminals and cable glands, remove the 3
screws (3.2) and the cover (3.1) (Fig. 9, left).
Caution! The screw terminals (4.1)
are live.
The 230 V power supply is potentially
dangerous!
Place the measured device at its zero position, i.e. the
position at which the KINAX WT 707 should produce 0 mA
(three or four-wire connection), respectively 4 mA (two-wire
connection) at its output.
Should the output current differ by more than 2% from its initial
value, repeat the coarse zero setting procedure described in
Section 6 "Mounting".
Then adjust the "ZERO" potentiometer (Fig. 12, right or
Fig. 13) using a watchmaker's screwdriver (2.3 mm diam.)
so that the desired output current flows.
(2.2) (2)
Fig. 12. Rear (2) of the transmitter with the adjustments
"ZERO", "SPAN" and "S1".
Left: Adjustments covered by the sealing screw (2.2).
Right: Adjustments exposed.
(3)
Fig. 13. Rear (3) of the transmitter with the adjustments
"ZERO", "SPAN" and "S1".
Zero Span
S1
Now rotate the measured device to its opposite limit position,
i.e. the position at which the KINAX WT 707 should produce
the prescribed full-scale output current (see rating plate).
Adjust the "SPAN" potentiometer with the screwdriver as
before until precisely the prescribed full-scale output current
is measured at the output.
Then recheck the zero point and correct on the ZERO po-
tentiometer if necessary. Check the full-scale value again.
Repeat both adjustments until both zero point and full-scale
value are precise.
9. Adaptation from 2-wire connection to 3 or
4-wire connection and vice versa
Transmitters with the ordering code 707 – ...D (see Section
4 "Specification and ordering information") are designed
for either a two-wire connection with an output range of
4...20 mA or a three or four-wire connection with an output
range of 0...20 mA.
If, however, a transmitter be changed from one to the other
(see wiring diagrams in Fig. 7 and 10), the beginning and
end of the measuring range must be readjusted.
10. Reversing the rotation for
instruments with measuring ranges 150
A switch is provided on angular transmitters with a measuring
range > 150 ° for reversing the direction of rotation. It is
marked S1 (Fig. 12 and Fig. 13).
At the version ...
... with plug-in connector remove the S1 sealing screw
(2.2) (Fig. 12, left).
... with screw terminals and cable glands, remove the
3 screws (3.2) and the cover (3.1) (Fig. 9, left).
Caution! The screw terminals (4.1)
are live.
The 230 V power supply is potentially
dangerous!
Then operate the switch by turning it a quarter of a turn with
a watchmakers screwdriver (2.3 mm diam.) and reset the
beginning and end of the measuring range.
Attention! In instruments with measuring
range less than 150
is not existing.
Forcing a watchmaker's screwdriver into
the opening will damage the PCB.
°
° the switch S1
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