DH Instruments PPCH-G, Руководство по эксплуатации и обслуживанию

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PPCH-G™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 52
Press
[ENT/SET P]
from the MAIN RUN screen. The display is:
1. Standard MAIN RUN screen first line showing
measured pressure and active Q-RPT.
2. Edit field for the pressure control target
pressure in current pressure unit of measure.
20.007 MPa g HI
Target:40.000
Edit the target pressure value as desired.
A target pressure entry that exceeds the current upper limit (see Section
3.4.4) is not accepted. Negative values are not accepted. See Section 3.3.10.6 for
information on zero target value.
Press
[ENT/SET P]
to start pressure control to the target pressure and return to the
MAIN RUN screen. The MAIN RUN screen when pressure control is active is:
1. Standard MAIN RUN screen first line showing
measured pressure and active Q-RPT. Shows
target pressure value when condition is
Ready .
2. Current control mode indicator. Flashes when
automated pressure control is active.
Character is
<D>
for standard or
<d>
for hi
volume dynamic control.
<C>
is appended if
custom control parameters are in use.
3. Target pressure value (
<T>
) when controlling
and condition is Not Ready . Current deviation
from the target pressure (
<D>
) when in
dynamic control mode and condition is Ready .
40.000 kPa a HI
D 0.002 D
Observe the Ready/Not Ready indicator LED (see Section 3.2.3) for indication of
when the controlled pressure has reached the target and stabilized inside the
hold limit. PPCH-G continues maintaining pressure at the target value following
dynamic control protocol (see Section 3.2.2.2) until automated pressure control is
interrupted.
If PPCH-G is unable to control pressure or appears to control pressure poorly,
see Section 6 to troubleshoot.
See Section 3.4.6 for information on customizing pressure control
parameters.
The [ ] and [ ] direct pressure control keys can be used while controlling
to jog the pressure control target value up or down by the jog step value (see Section
3.1.3). These keys also jog the target value when in the ENTER target value screen.