3. OPERATING PRINCIPLES
Page 17
© 2009 DH Instruments, a Fluke Company
3.
Operating Principles
3.1
User Interfaces
PPC4 is designed with two front panel local interface configurations. The Advanced Graphical User
Interface version, PPC4-ui, is typically used for bench top operation. The limited function Basic Interface
with the basic PPC4 is typically used for computer controlled applications such as automated calibration.
See Section 4 for operation information on the Basic Interface. See Section 5 for operation information on
the Advanced Interface.
Remote communication is by RS232 (COM1), IEEE-488, Ethernet or USB. See Section 6 for specific
information on remote communication.
Every PPC4 ships with PPC4 Cockpit software as well. PPC4 Cockpit communicates with the PPC4 by
RS232, Ethernet, IEEE-488 or USB. PPC4 Cockpit duplicates the functionality, look and feel of the
advanced user interface and provides functionality and an easy to use interface for users of both basic
PPC4 and PPC4-ui (see Section 6.2).
3.2
General Operating Principles
3.2.1
Direct Pressure Control
PURPOSE
The direct pressure control keys provide direct manual control to increase, decrease, and jog
the PPC4 pressure.
OPERATION
or
(
or
for the Basic Interface) cause pressure to increase or decrease at the fast
slew rate.
or
when dynamic control is not active cause pressure to increase or decrease at the
slow slew rate.
or
during dynamic control causes the pressure to jog or step by a fixed amount.
During active pressure control, they cause the target pressure to be changed by the fixed
amount. One press causes one step. The approximate value of the step is set automatically
depending on the current active PPC4 range. The value can be adjusted with the Jog function (see
Section 3.2.19).
Caution
The fast direct pressure control keys,
and
, interrupt and override
automated pressure control.
3.2.2
Automated Pressure Control
PPC4 automated pressure control provides automated adjustment and control of pressure to
a user designated target value.
from the Main Run Screen allows a pressure control
target value to be entered and executed.
or
cause active pressure control to be
interrupted. Sending a remote command when in local mode also interrupts pressure control.
Summary of Contents for PPC4
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