DH Instruments ADCS-601, Operation And Maintenance Manual

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4. OPERATION
Page 75 © 2005 DH Instruments, Inc.
4.3.5.1 ADCS RUN SCREEN CONTROL PANEL
The features of the ADCS Run Screen Control Panel (see Figure 36) are
summarized in Table 15.
Table 15. ADCS Run Screen Control Panel features
LABEL DESCRIPTION
Circular Ready/Not Ready
Indicator and Ready timer
Green when the ADCS-601 pressure is Ready . Red when the
pressure is Not Ready . When the FPG8601 is the active pressure
standard, characters immediately below the circular indicator
indicate whether the
Not Ready condition is due to an FPG8601
operational limit being exceeded (see Section 4.1.1).
When Ready is achieved, a counter is displayed to the upper right
of the circular indicator. The counter accumulates time since the
Ready condition occurred. This feature is convenient to assure a
certain dwell time at pressure after the pressure has been set.
Pressure
Displays pressure, pressure unit of measure and measurement
mode (
<a> absolute, <g> gauge). This is the pressure applied to
ADCS-601 TEST(+) port by the active pressure standard.
When PG7601 is the active pressure standard, the pressure value
shown is valid ONLY when the PG7601’s piston is floating and the
pressure is
Ready .
Provides a status message during functions in which the pressure
is not known.
Right click on the value to produces a pop up menu in which the
unit of measure can be changed (see Section 4.2.2), the resolution
of the pressure value can be adjusted and a strip chart of the value
over time can be displayed.
Target Pressure
Enter/display a target pressure and the unit of measure. Double
click the displayed value to highlight and edit the complete number.
Enter a desired target pressure and press [ENTER] for the ADCS-
601 to set a pressure automatically.
Regulate Target
and
[ ] s
Appear only when FPG8601 is the active pressure standard.
Checking the <Regulate Target> box causes the FPG8601 system
to regulate the pressure read by the FPG8601 to equal the target
pressure value and changes the
Rready/Not Ready criterion (see
Sections 4.1.4, 4.1.2.3). This will cause the final set pressure to
equal the target pressure and will increase the time required to set
a pressure.
The <s> value is the frequency, in seconds, with which the
readjustment of pressure control to regulate to the target value
occurs. Default is 30 s.
ATM
Displays atmospheric pressure value as read by the PG7601’s on-
board barometer.
Right click on the value to produces a pop up menu in which the
unit of measure can be changed, the resolution of the pressure
value can be adjusted and a strip chart of the value over time can
be displayed. The
<ATM> unit of measure is independent of other
pressure display fields.
Reference Vacuum
Displays current value of vacuum read by the CDG vacuum gauge
of the active pressure standard when ADCS-601 is in absolute
measurement mode.
Indicates “N/A” when ADCS-601 is in gauge mode.
Right click on the value to produces a pop up menu in which the
unit of measure can be changed, the resolution of the pressure
value can be adjusted and a strip chart of the value over time can
be displayed. The
<Reference Vacuum> unit of measure is
independent of other pressure display fields.