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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.
Remove the ZERO/SPAN sealing plug (4) (Fig. 7, left). Place the measured device
at its zero position, i.e. the position at which the KINAX 3W2 should produce 0 mA
(3- or 4-wire connection) resp. 4 mA (2-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. 7, right) using a watchmaker's screw-
driver (2.3 mm diam.) so that the desired output current flows.
Fig. 7.
Adjustments
«ZERO», «SPAN»
and «S1».
Left:
Adjustments
covered by the
sealing plug (4)
Right:
Adjustments
exposed.
11. Dimensional drawings
48
M3
4.5 low
120°
Fig. 8. KINAX 3W2 with standard drive shaft at front only,
Ø 2 mm, length 6 mm.
48
M3
4.5 low
120°
Fig. 10. KINAX 3W2 with special drive shaft at front only,
∅ 6 mm, length 12 mm.
48
M3
4.5 low
120°
Fig. 12. KINAX 3W2 with special drive shaft at front only,
∅ 1/4", length 12 mm.
(4)
1
1
1
6
–0.008
Ø 2
–0.014
7
26.1
1
1
12
1
– 0.004
Ø6 g6
– 0.012
7
26.1
1
1
12
1
Ø1/4"
–0.005
(6.35 g6)
–0.014
7
26.1
Now rotate the measured device to its opposite limite position, i.e. the position at
which the KINAX 3W2 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.
Now recheck the zero value and readjust on the ZERO potentiometer and then
recheck the full-scale value.
9. Adaptation from 2-wire connection to 3- or
4-wire connection and vice versa
Transmitters with the ordering code 708 – ...D (see Section "4. Specification and
ordering information") are designed for either a 2-wire connection with an output
range of 4...20 mA or a 3- or 4-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. 6), 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
reversing the direction of rotation. It is marked S1 and can be operated through the
opening in the rear part of the transmitter (Fig. 7).
To reverse the direction of rotation, remove the sealing plug (4) covering the switch
S1. Then operate the switch by turning it a quarter of a turn with a watchmakers
screwdriver (2.3 mm ∅), and reset the beginning and end of the measuring range.
48
M3
4.5 low
120°
Fig. 9. KINAX 3W2 with special drive shaft at front and at rear.
At front: Ø 2 mm, length 12 mm. At rear: Ø 2 mm, length 6 mm.
48
M3
4.5 low
120°
Fig. 11. KINAX 3W2 with special drive shaft at front and at rear.
At front: ∅ 6 mm, length 12 mm. At rear: ∅ 2 mm, length 6 mm.
48
M3
4.5 low
120°
Fig. 13. KINAX 3W2 with special drive shaft at front and at rear.
At front: ∅ 1/4", length 12 mm. At rear: ∅ 2 mm, length 6 mm.
4
°
1
1
12
1
6
–0.008
Ø 2
–0.014
7
26.1
1
1
12
1
6
Ø2
– 0.004
Ø6 g6
– 0.012
7
26.1
1
1
12
1
6
Ø2
Ø1/4"
–0.005
–0.014
(6.35 g6)
7
26.1
° for
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