3. OPERATION
Page 31
© 2007 DH Instruments, a Fluke Company
Table 4.
Position designators of Q-RPTs in a PPCH-G system
Q-RPT POSITION
IDENTIFICATION
DISPLAY SYMBOL*
Internal to PPCH-G, utility sensor, if
present
Internal Utility, Hi
IuH
Internal to PPCH-G, Q-RPT of highest
range
Internal, Hi
IH
Internal to PPCH-G, Q-RPT with lower
range in PPCH-G with two Q-RPTs or a
utility sensor and Q-RPT.
Internal, Lo
IL
External to PPCH-G, Q-RPT of higher
maximum range in RPM4 connected to
PPCH-G
External 1, Hi
X1H
External to PPCH-G, Q-RPT of lower
maximum range in RPM4 connected to
PPCH-G
External 1, Lo
X1L
• The display symbol is included in the upper, right hand corner of most PPCH-G displays and menus as a
convenient indicator of the active Q-RPT.
3.2.6
MULTIPE RANGES (Q-RPTS, AUTORANGE AND INFINITE
RANGING)
A PPCH-G range is defined as a pressure span and associated settings.
A PPCH-G may have multiple ranges. Each Q-RPT (and the utility sensor, if present) available
to the PPCH-G system has a default range which is its maximum range. Additional ranges, lower
than the Q-RPT’s maximum range, may be created using AutoRange (see Section 3.3.4).
Ranges created using AutoRange may be saved with all their settings for reactivation later (see
Section 3.4.1).
A PPCH-G range is identified by a range screen showing the Q-RPT used by the range, its
current unit of measure and its full scale pressure in gauge and absolute measurement modes. The
range screen is viewed by pressing [RANGE] or [+/-] from the MAIN RUN screen.
1.
Q-RPT or utility sensor designator.
2. Type of range.
<DF>
for the Q-RPT’s default range;
<AR>
for a
range created by AutoRange.
3.
Q-RPT or utility sensor position designator.
4.
Current pressure unit of measure.
5.
Full scale pressure in current unit of measure in gauge and absolute
measurement modes.
Active A100M DF IH
psi 15000g/15000a
Most settings made in a PPCH-G range, such as unit of measure, measurement mode,
display resolution, control mode and control parameters are specific to the range. The range
specific settings are stored with the range and recalled whenever the range is made active.
This makes setting up and saving ranges a convenient way to store and recall frequently used
operating configurations. See Table 5 for a listing of PPCH-G adjustments and settings and
whether they are range, Q-RPT or system specific.
The ranges available on a PPCH-G system are accessed using
[RANGE]
(see Section 3.3.1)
and/or created using
[AutoRange]
(see Section 3.3.4). External Q-RPTs connected to the
PPCH-G (see Section 3.2.5) are initialized using
[RPT]
(see Section 3.3.5).
