Siemens SITRANS P 7MF4232, Руководство по эксплуатации

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7MF4232 Operating Instructions
31 C79000-B5676-C92-01
4.3.3.7 Disable pushbuttons and/or functions
The pushbuttons located under the protective cover can be protected together with their functions against
accidental or unauthorised use.
- Select mode 10 using the
M
key.
- Use the or key to select one out of four functions
!
no pushbuttons or functions disabled (operation see chapter 4.3.3, page 27)
!
all pushbuttons and functions disabled
!
all functions disabled except start of scale (to set or adjust start of scale see chapter 4.3.2,
page 24)
!
all functions disabled except start of scale and full scale (to set or adjust start of scale or full scale
see chapter 4.3.2, page 24)
Changing the mode causes the selected locking to be stored. The disabling of pushbuttons and/or func-
tions is displayed. It is cancelled when the
M
key is pressed more than 5 s.
.
Note
D
When selecting lock or the measured value display current in mA or % should
be chosen beforehand in mode 13 (see chapter 4.3.3.8, page 31) . Otherwise a change
of the output value is not noticeable when the or keys are pressed.
D
If an is displayed on the LCD, then the transmitter parameters are protected against
overwriting (see chapter 4.4).
4.3.3.8 Select display (current, %, pressure)
It can be displayed either the input variable pressure in the selected unit in mode 14 or the output variable
current in mA or %.
- Select mode 13 using the
M
key
- Use the or key to select the required variable
4.3.3.9 Select engineering units
The following engineering units can be chosen from:
2)
bar mbar in H
2
O
1)
in Hg ft H
2
O
1)
mm H
2
O
1)
mm Hg psi Pa kPa MPa
- Select mode 14 using the
M
key
- Use the or key to select the engineering units
.
Note
If there is an LCD overflow then appears (with small engineering units like e.g. Pa)
1)
Reference temperature 20
_
C
2)
The engineering unit set in the local LCD is independent from the selected engineering unit.