DH Instruments PPCH-G, Руководство по эксплуатации и обслуживанию

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PPCH-G™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 40
 OPERATION
To run the Q-RPT and utility sensor search and initialize function, press
[RPT]
. PPCH-G
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 QRPTs or utility sensor in Internal
(PPCH-G), Hi and Lo positions.
2. X1H and L: Identification of QRPTs in External 1 (RPM4), Hi and Lo
positions.
IH:A200Mu L:none
X1H:A200M L:A70M
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
3.2.6). 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 4 for information on Q-RPT system position identification designators.
For PPCH-G to successfully identify and initialize an external RPM4, the RPM4 COM1 port
settings must be:
Baud rate: between 1200 and 19200
Parity: Even
Date bits: 7
Stop bits: 1
If PPCH-G is not able to establish communications with an RPM4 and its Q-RPTs, check that the
RPM4 COM1 port setting conforms 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.
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 PPCH-G pressure controller, the
RPM4 front panel keypad is locked out and the second line of the display becomes:
<PPCH-G EXT DEV: IDLE> (if RPM4 is initialized by PPCH-G but not currently in use)
<PPCH-G EXT DEV: ACTIVE> (if RPM4 is initialized by PPCH-G and is currently in use)
After using an RPM4 as an external device for a PPCH-G, cycle power to return to the previous
RPM4 settings, restore front keypad capability and return to the normal MAIN RUN screen.
3.3.6 [AUTOTEST]
 PURPOSE
To execute a programmed sequence of automated pressure control target values and/or to
AutoRange the PPCH-G based on the full scale and tolerance of the device under test.