2. INSTALLATION
Page 15
© 2009 DH Instruments, a Fluke Company
To connect a PPCH to an RPM4 to be used as part of the PPCH system proceed
as follows:
Set up the RPM4 for use as a PPCH external device following the instructions
in the RRPM4 Operation and Maintenance Manual, Using RPM4 With a PPC3
Controller/Calibrator Section.
Using tubing of appropriate pressure rating and a tee fitting, connect the
RPM4 Q-RPT
TEST(+)
port to the PPCH
TEST
port (see Figure 6 for
instructions on making this connection using the standard interconnection
accessories supplied with the PPCH). The third leg of the tee is for the
connection to the device or system under test.
When external Q-RPTs are used with PPCH, the maximum set pressure is
the maximum pressure of the PPCH controller/calibrator. The maximum pressure
of the PPCH is determined by the PPCH controller model or the Hi Q-RPT if one is
installed (see Section 1.2.1).
Using a standard pin-to-pin DB-9M to DB-9F RS232 cable, connect COM2 of
the PPCH to COM1 of the RPM4 (see Section 4.2.1.3).
Turn ON the RPM4 and the PPCH.
Press
[RPT]
on the PPCH key pad. This causes PPCH to execute the
Q-RPT search function (see Section 3.3.5). Following the search, Q-RPTs
with whom communication is established are shown on the PPCH display,
identified by their position (see Table 6).
For PPCH to identify external RPM4s, the RPM4 COM port settings
must be:
Baud rate: between 1200 and 19200
Parity: Even
Data bits: 7
Stop bits: 1
If PPCH is not able to establish communications with an RPM4 and its
Q-RPTs, check that the RPM4 COM1 port settings conform to the requirements
above. If the COM1 port settings are correct, check that the correct communications
cable is being used (standard pin-to-pin DB-9M to DB-9F RS232) and is connected
to the correct communications ports.
PPCH COM2 > 1st RPM4 COM1; 1st RPM4 COM2 > 2nd RPM4 COM1
See the RPM4 Operation and Maintenance Manual for additional information on
RPM4 RS232 communications and COM port settings.
