DH Instruments PPC2+, Manual

Page: 75 / 166

PPC2+™ Operation and Maintenance Manual
Page 67
©2001 DH Instruments, Inc.
3.4.4.2 CAL
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PURPOSE
To calibrate the PPC2+ Hi and Lo reference pressure transducers and adjust the
on-board barometer. This function is considered part of PPC2+ maintenance and
is therefore covered in the maintenance section of this manual (see Section 5.2).
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PRINCIPLE
See Sections 5.2, 5.3, and 5.4.
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OPERATION
See Sections 5.2, 5.3, and 5.4.
3.4.4.3 REMOTE
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PURPOSE
To configure the PPC2+ communication ports including COM1, COM2 and the
IEEE-488 interface.
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PRINCIPLE
The PPC2+ has two RS-232 communications ports referred to as COM1 and
COM2 and an IEEE-488 (GPIB) interface. Communication with a host computer
is accomplished using either COM1 or the IEEE-488 interface. COM2 is reserved
for connecting an external device (e.g., a multimeter, RPM, etc.).
The configuration of all the communication ports can be set up through the
PPC2+ front panel.
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OPERATION
To access the port configurations and remote program command mode, select
<3Remote> under <4Internal> of the SPECIAL menu. Select <COM1>,
<COM2> or <IEEE> to view and edit that port’s settings. Select <format> to
select the remote programming command format to use (see FORMAT of
this section).
COM1 and COM2
The COMx ports can be set for the specific settings required by the user.
These settings are baud, parity, length and stop bit. The available options are:
•
Baud: 300, 600, 1 200, 2 400, 4 800, 9 600
•
Parity: NONE, ODD or EVEN
•
Length: 7 or 8
•
Stop Bit: 1 or 2
The default is <2400, E, 7,1> for COM1 and COM2.