Rosemount P330, Installation And Operation Manual, Page: 16 / 92

Rosemount Model P330 Pressure Validator
2-4
NOTE
The validator must be powered on in order to charge. The validator may
be operated while in charging mode.
PRESSURE CONTROLS
The pressure controls are used to generate and control pressure during
pressure validations. Pressure controls are shown in Figure 2-2 and
described in Table 2-1.
The validator is not equipped with a connector for the pressure port. A
1 /
8
–27 NPT coupling and a lead tube with the correct coupling for the
transmitter are required to properly generate a pressure.
TABLE 2-1. Pressure Controls.
Pressure/Vacuum Knob
Pressure Pump
Reference Pressure Port
Fine Pressure Adjuster
Release Valve
Vent Port
FIGURE 2-2. Pressure Controls.
Pneumatic Control Function
Reference Pressure Port Point of pressure connection to the transmitter being tested. It is
a
1
/
8
–27 NPT connection
Pressure Pump Generates pressure
Fine Pressure Adjuster Adjusts the reference pressure generated by the pressure pump
Release Valve Releases system pressure through the vent port
Vent Port The system’s point of pressure release
Pressure/Vacuum Knob Selects positive or negative pressure (i.e., pressure or vacuum)
See Safety Messages on page 2-1 for complete warning information.