Ashcroft GC51, Инструкция по установке и обслуживанию

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18
11.3 Linear Display Mode
(Re-scaling arbitrary user defined units)
This mode is used for display/analog output of the scaling value
where the pressure is linearly converted to an arbitrary physical
quantity (user defined, GC51 is supplied with display unit “PSI”).
FURTHER DETAIL regarding menu and button sequence is shown
in Section 14.2-14.3.
A. Linear display
By setting the OFFSET to the minimum pressure P1 and the
FULL SCALE to the maximum pressure P2, the linear display in-
dicates the value on the line between the two points (the maxi-
mum display span). The actual linear display span depends on
the setting of the zero point and span point of the analog output
as shown in (2) of the next page. It can display the range of –5 to
105%F.S. of the linear display span.
• The setting range for the minimum pressure P1 and the maxi-
mum pressure P2 is 0 to 100%F.S. of the pressure range. The
maximum pressure P2 is set from the value which is more than
25% FS of the pressure range above the minimum pressure P1.
• The setting range for the OFFSET and FULL SCALE values
is –1999 to 1999, and the decimal point can be set arbitrarily.
At this time, the arbitrary unit monitor turns on (farthest indi-
cating light at the bottom right of display).
Example: Increasing
Display
Pressure
Full scale
(20mA)
P
1
(Min)
P
2
(Max)
Offset
(4mA)
Display
Pressure
Offset
(20mA)
P
1
(Min)
P
2
(Max)
Full Scale
(4mA)
Example: Decreasing
Note: see page 24 for full menu.
Min. pressure P1 & max. pressure P2 setting
⇒
Setting item ,
OFFSET & FULL SCALE setting
⇒
Setting item , ,