DH Instruments PPC4, Руководство по эксплуатации и обслуживанию

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PPC4™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company Page 26
Note
•
AutoRanged ranges cannot have altitude units (ft, m)
•
If an external Q-RPT that should be available is not being selected by
AutoRange, search for Q-RPTs using use
[AutoRange], [RPT Search] in
the Advanced Interface or <RPT> in Basic Interface. Determine whether
external Q-RPTs have been properly connected and initialized (see
Section 3.2.5).
•
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.
•
For PPC4 to successfully identify and initialize external RPM4s, the
RPM4 COM1 port settings must be:
Baud rate: between 1,200 and 19,200
Parity: Even
Date bits: 7
Stop bits: 1
•
If PPC4 is not able to establish communications with RPM4s and their
Q-RPTs, check that the RPM4 COM1 port setting 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.
PPC4 COM2 > RPM4 COM1
•
See the RPM4 Operation and Maintenance Manual for additional
information on RPM4 RS232 communications and COM port settings.
•
When an RPM4 is initialized as an external device to a PPC4 pressure
controller, the RPM4 front panel keypad is locked out and the second
line of the display becomes:
<PPC EXT DEV: IDLE> (if RPM4 is initialized by PPC4 but not
currently in use)
<PPC EXT DEV: ACTIVE> (if RPM4 is initialized by PPC4 and is
currently in use)
•
After using an RPM4 as an external device for a PPC4, cycle power to
return to the previous RPM4 settings, restore front keypad capability
and return to the normal Main Run Screen.
•
The PPC4 utility sensor (IuH) cannot be AutoRanged.
•
The BA100K Q-RPT cannot be AutoRanged.

Caution
•
Before operating PPC4 with external Q-RPTs, check carefully that the
Q-RPT TEST(+) ports are connected to the PPC4 TEST(+) port. If the
external Q-RPTs are NOT connected to the PPC4 TEST(+) port, they will
not measure the pressure generated by PPC4 and PPC4 may reach a
pressure higher than the target pressure before its watchdog function
recognizes that the external RPT is not connected.
•
RPM4 with Q-RPT full scale spans below 14 MPa have SDS self defense
system to isolate and protect the Q-RPTs. If an external RPM4 SDS
pressure rating is less than the PPC4 maximum pressure then a
warning will be displayed on the PPC4 front panel when the RPM4 is
detected. In addition, AutoRanged ranges greater than the SDS rating
are not allowed (see Sections 3.2.5, 6.5.43.2.8). In order to create