RMG ERZ2000-NG, Operating Manual

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5 Transmitters
Manual ERZ 2000-NG · EN07 · 2019, May 13th
177
A 4..20 mA operating mode could also be selected for the chosen transmitter, then
additional settings are necessary (definition of the measuring range, correction of
characteristic curve, etc.).
Other adjustment options can be selected for other transmitters with different trans-
fers. For testing purpose Random provides a stoichiometric signal, Sine a sinusoidal
shape and Jump a jump of the measurement.
Clicking on the underlined parameters provides further, in-depth information about
the parameter, e.g. "
Menu ":
Figure 122: "Menu" terminology explanation
There are additional parameters back in menu
AB Absolute pressure (
Figure 119:
Menu AB Absolute pressure
).
If the operating mode is set to "Off", no measurement takes place and the input is
switched off. With Default, no measurement takes place, but a fixed value is used for
additional calculations.
Resistance measurements on PT100, PT500 and PT1000 can be also be conducted
for the gas temperature measurement (next chapter). The characteristic curve of
these resistance measurements as a function of the temperature is not exactly linear,
and can be described by a polynomial with 4 coefficients (0, 1, 2, 3). Then the corre-
sponding coefficients can be entered.
If the operating mode "0/4-20 mA limit value" is selected, the limit ranges automati-
cally define the alarm limits. This does not apply with the setting "4-20 mA coeff." for
the operating mode. With the 4-20 mA coefficient setting, it is not the calibrated range
that defines the alarm limits, rather the value of "Coefficient 0" is set for the 0/4 mA
value and the value of "Coefficient 1" is set for the 20 mA value. Then, the alarm lim-
its are freely adjustable and have no effect on the representation of the current input.
The DZU protocol is also frequently selected for digital transfer for pressure and tem-
perature.
The unit for pressure can be selected as bar, kp/cm
2
, psi, MPa, atm, kPa, torr, bara,
Pa and hPa.
The default value is used when the measurement runs beyond of the alarm limits.