EB 6111 EN
11
Operation
4.1.1
Zero
1.
Connect a pressure gauge (minimum ac-
curacy class 1) to the converter output.
2.
Set the supply air to 0.4 bar above the
upper output signal range value and ap
-
ply it to the device.
3.
Deactivate the switch-off electronics at
the slide switch (5) (push the switch ac-
cessible through the oblong hole at the
bottom of the converter away the ACTIVE
arrow).
4. Set the input signal to the lower range
value using a suitable ammeter (e.g. set
it to 4 mA for 4 to 20 mA range = 0.2 to
1 bar).
The output signal of the pressure gauge
should now indicate 0.2 bar.
If this is not the case, readjust the zero
point accordingly with the ZERO potenti-
ometer.
4.1.2
Span
1.
Set the input signal to 20 mA (upper
range value) using a suitable ammeter.
For example, the output signal at the
pressure gauge should now indicate
1.0 bar for a 4 to 20 mA range = 0.2 to
1.0 bar.
2.
If this is not the case, readjust the span
accordingly with the SPAN potentiome-
ter.
3.
Change the input signal abruptly from
20 to 0 mA and check whether the out-
put signal assumes the upper range val
-
ue of 1.0 bar.
As the adjustment of zero and span influ-
ence each other, recheck both values and
correct them, if necessary.
4.2
Zero adjustment for ver-
sions with an input signal
of 0 to 20 mA
These versions do not have potentiometers to
adjust zero or span nor switch-off electron-
ics. The zero point can only be adjusted me-
chanically at the zero screw (1.1).
To proceed, remove the front cover and in-
sert a screwdriver through the hole in the
cover of the Type 6112 i/p Module (see
Fig. 1 and section 10).
