IM-P402-62 AB Issue 5
5
4.3 To change the function settings
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Unplug the transmitter from its base.
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Remove the rear cover panel.
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Slide out the printed circuit board.
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An 8-way switch on the printed circuit board determines the transmitter functions.
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Set the switches to the positions shown in the diagram for the chosen functions.
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Replace the printed circuit board.
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Ensure that the LED’s engage with the holes in the front panel.
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Replace the rear cover panel.
Note that Switches 4, 5 and 7 are not used.
4.4 Current /voltage input - Switches 1 and 2
The transmitter is supplied set for use with a capacitance probe, (voltage input).
If a current input is required, for use with a temperature transmitter for example, set switch 1 and
2 to ON.
4.5 Inverse output - Switch 3
The transmitter is supplied set so that a rising level at the probe will give a rising output from the
transmitter.
If a falling transmitter output is required with a rising input, as when using a differential pressure
transmitter for level monitoring, set Switch 3 to OFF.
4.6. Wave filter - Switch 8
This feature averages the signal over a longer period for high output boilers where waves and high
turbulence may otherwise cause continuous oscillation of the output signal.
If the wave filter is required, set Switch 8 to ON.
Fig. 3
Capacitance probe
input (voltage)
Capacitance probe
input (voltage)
Inverse output
Not used
Not used
4 - 20 mA
Not used
Filter OFF
Current input ( 4 - 20 mA)
Current input ( 4 - 20 mA)
(or 0 - 2 V)
Normal output
0 - 20 mA
Filter ON
ON
1
2
3
4
5
6
7 8
