Endress+Hauser cerabar S, Руководство по эксплуатации

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3 Operation
3.1 On-site operation
Operating elements Four keys, which allow the lower and upper range-values to be set, are available for
on-site operation. The key functions are listed in the table below.
Display module The local display module admits two display modes:
•
Display in measurement mode: This is shown as standard
•
Display in calibration mode: This is shown after pressing one of the keys +Z, –Z, +S
or –S once. Returns automatically to measurement mode after 2 seconds.
Key functions
+Z increases the lower range-value (zero) by +1 digit *
–Z decreases the lower range-value (zero) by –1 digit *
+S increases the upper range-value (span) by +1 digit *
–S decreases the upper range-value (span) by –1 digit *
Key combinations
(Press keys simultaneously)
Keys Function
Calibration
+Z and –Z the acting pressure is taken as lower range-value (4 mA)
+S and –S the acting pressure is taken as upper range-value (20 mA)
Bias pressure
2 times +Z and +S the acting pressure is taken as bias pressure**
1 time +Z and +S the current bias pressure** is shown
2 times –Z and –S the current bias pressure** is deleted
Securing the measuring point by locking/unlocking
+Z and –S Locking the measuring point
–Z and +S Unlocking the measuring point
The procedure for commissioning the measuring point with local operation is described
in Chapter 4.
Table 3.1
Key functions
* Note: Pressing once activates
the display, only by pressing
again does the display begin to
count. When the key is pressed,
the value begins to run slowly at
first, then faster and faster.
** If the display indicates process
pressure zero not as zero after
calibrating lower range-value
(depending on position) you can
correct the display value to zero
by adopting a bias pressure. The
position calibration using a bias
pressure does not affect the
current output.
-0.1...0.3 bar
-0.1...0.3 bar g
-0.1...0.3 bar g
– –
+ +
Z S
– –
+ +
Z S
ZS
+Z
-Z
+S
-S
z
➂
➀
➁
➅
➃
➄
Keys for on-site operation
BA187Y2
7
Display module
➆
Display in
measurement mode
Display in calibration mode
Figure 3.1
User interface of the
Cerabar S, with optional display
module
Display in measurement mode
➀
4-figure display of
measured value and input
parameters
➁
Bar graph of
measured value
➂
Lower range-value
➃
Upper range-value
➄
Nominal measuring range
With display in
in calibration mode
➅
Display of the calibration point
(Z=Zero, S=Span)
➆
Set measuring range within
the limits of the measuring cell
3 Operation Cerabar S
14 Hauser