PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc.
Page 30
3.2.3.1
SYSTEM DEFAULT CONTROL PARAMETERS
Table 6. Lo or Hi Reference Transducer Range 1, 2, 3
HOLD LIMIT
STABILITY LIMIT
STATIC
MODE
± 1 % FS of the active pressure measurement
range
± 0.005 % FS/sec of the active pressure
measurement range.
DYNAMIC
MODE
± 0.005 % FS of the active range or ± 2 ppm
FS of range H3, whichever is larger
± 0.005 % FS/sec of the active pressure
measurement range
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3.2.3.2
EXECUTING AUTOMATED PRESSURE CONTROL COMMANDS
m
PURPOSE
To use the automated pressure control functions of PPC2+ to set target
pressure values.
m
OPERATION
To set a pressure, press [ENTER] from the main run screen. The display is:
1. Ready
(<*>)/Not Ready (<
↑
>) or <
↓
>) indication,
current pressure, units, measurement mode,
range (regular first line of main run screen).
2. Entry field for target pressure value to be set
automatically. Comes up with last entry or zero if
pressure measurement units have been
changed, range has been changed, or system
has been vented.
Use the numerical keys and editing keys to enter the target pressure value
desired (see Section 3.2.3.2.2) for information on zero pressure commands.
Also, the [
←
] and [
→
] keys can be pressed to
jog
the current target pressure
value displayed down or up by the current pressure control hold limit.
Press [ENTER] to start pressure control to the target pressure and return to the
main run screen. The main run screen is:
1. Ready
(<*>)/Not Ready (<
↑
> or <
↓
>) indication,
current pressure, units, measurement mode,
range (regular first line of main run screen).
2. Current control mode indicator: Flashes when
automated pressure control is ON. <D> for
dynamic control, <S> for static control with <C>
added if custom control parameters are in use.
3. Target pressure value <T> when controlling and
in Not Ready (<
↑
> or <
↓
>) condition; pressure
rate of change value <R> when in static control
mode and waiting for stability; current deviation
from the target value <D> when in dynamic
control mode and Ready (<*>) condition.
2
Target:135.000
2
3
T 250.000 DC
Summary of Contents for PPC2+
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