GE MN-ValVue-v2-8-IOM Manuel de service Page 288

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ValVue Digital Communications Software Ver. 2.80
288
GE Oil & Gas
Change Mode
The Change Mode button located at the bottom left of all ValVue 12400 screens allows you to
change the operating 12400 mode. When selected, you can change the 12400 mode to either
of two operating modes:
Normal - In this mode the ValVue 12400 measures the Process Variable (PV) and
transmits the PV as a 4 to 20 mA signal. The monitor displays level detection
accordingly (indicator green).
Setup - In this mode you can set calibration and configuration parameters.
In addition to the two user-selectable modes, there is an additional mode that is the result of
internal diagnostics:
Failsafe - When the 12400 cannot operate correctly the device goes into failsafe mode
and remains in the failsafe mode until you intervene. In failsafe mode, the output signal
is either below 3.6 mA or above 20.5 mA, as configured in “Advanced Setup” on
page 367.
To change 12400 mode:
1. Click Change Mode as (Figure 75).
Figure 75 Selecting Change Mode
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