3. OPERATION
Page 33 © 2002-2007 DH Instruments, a Fluke Company
To verify or confirm the range from the MAIN RUN screen, use [+/-] or [RANGE] to view
the active range (see Section 3.3.1).
See Table 6 for a listing of all selections and settings affected by AutoRange and their
default values.
3.3.5 [RPT]
PURPOSE
Search for, initialize and display internal and external Q-RPTs available to the PPC3 system.
PRINCIPLE
Up to six Q-RPTs can be included in a PPC3 pressure controller/calibrator system (see Section
3.2.4). PPC3 communicates with external Q-RPTs by RS232 over its COM2 port.
To be available for use by the PPC3 system, external Q-RPTs must be identified and
initialized. A Q-RPT search function occurs automatically each time PPC3 power is cycled.
Also, pressing [RPT] initiates the Q-RPT search and allows the Q-RPTs that are available to
PPC3 to be viewed. Use [RPT] to keep the PPC3 system configuration current if you connect
and disconnect Q-RPTs without turning PPC3 power OFF and ON.
See Section 2.3.7 for information on hooking up external Q-RPTs to a PPC3 system.
Before operating PPC3 with external Q-RPTs, check carefully that the Q-RPT TEST(+) port is
connected to the PPC3 TEST(+) port. If the external Q-RPT is NOT connected to the PPC3
TEST(+) port, it will not measure the pressure generated by PPC3 and PPC3 may reach a
pressure higher than the target pressure before its watchdog function recognizes that
the external RPT is not connected.
OPERATION
To run the Q-RPT and utility sensor search and initialize function, press [RPT]. PPC3
displays <Searching for RPTs…> while it runs the search function. When the RPT search is
complete, the Q-RPTs identification screen is displayed.
1. IH, and L: Identification of RPTs in Internal (PPC3), Hi and Lo
positions.
2. X1H and L: Identification of RPTs in External 1 (first RPM4), Hi and Lo
positions.
3. X2H and L: Identification of RPTs in External 2 (second RPM4), Hi
and Lo positions.
IH:A7Mu L:none
X1H:A7M L:A700K
X2H:G200K L:none
The cursor is on the position designator of the active Q-RPT or utility sensor. Use the cursor
control keys to move the cursor to other positions and to view the third line if present. Press
[ENT] to make the selected Q-RPT or utility sensor active in its default range (see Section
3.2.5). Press [RPT] again to cause the Q-RPT search to run again. Press [ESC] to return to the
MAIN RUN screen without making any changes.
See Table 1 for a listing of Q-RPT designators and their corresponding default ranges and
Table 3 for information on Q-RPT system position identification designators.
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