DH Instruments PPCK PLUS, Operation And Maintenance Manual

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PPCK+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc .
Page 8
2.2 SITE REQUIREMENTS
The PPCK+ can be installed on any flat, stable surface at a convenient height. The front feet can
be extended so that the unit can be inclined slightly for easier viewing. The PPCK+ can also be
mounted in a standard 19 in. rack mount using the optional rack mount kit.
Minimizing the length of tubing connecting the PPCK+ to the device or system to be tested
enhances control performance and reduce pressure setting times.
Ready access to the PPCK+ rear panel should be considered to facilitate making and breaking
pressure connections when necessary.
Support facilities required include:
•
An electrical power source of 85 to 264 VAC, 47 to 440 Hz.
•
A continuous regulated high pressure supply of clean, dry, non-corrosive gas at maximum
PPCK+ range (H3) + 5 % to be connected to the SUPPLY port. Supply pressures of less than
range H3 + 5 % may cause out of tolerance pressure control. The SUPPLY source must remain
stable
±
1 % while PPCK+ is controlling. If a gas booster is used to supply high pressure, an
accumulator is required to dampen the pressure changes caused by the booster cycling.
Consider using the
DHI GB-K gas booster package.
•
A continuous regulated drive air pressure supply of clean, dry non-corrosive gas at 700 to
850 kPa (100 to 120 psig). The drive air supply must remain stable
±
5 % during
PPCK+ operation. This DRIVE pressure supplies the precision low pressure control system that
actuates PPCK+’s high pressure valves. The flow and consumption requirements are
extremely
low. Use of instrument grade nitrogen or air from a compressed air bottle
is recommended. If shop or factory air is used, a filter/dryer must be installed. The DHI GB-K
gas booster package includes a DRIVE air regulator and connection.
2.3 INITIAL SETUP
2.3.1 PREPARING FOR OPERATION
To prepare PPCK+ for check out and operation:
n
Remove the plastic caps from the PPCK+ rear panel pressure connections.
o
Remove the protective plastic sheet from the front panel display.
p
Install the rubber feet caps onto the bottom case feet, if desired.
q
Familiarize yourself briefly with the front and rear panel (see Section 2.3.2).