The PDR900 controller is

compatible with the digital

Series 900 transducers,

shown in graph.

Figure 1

Figure 2

Figure 3

Figure 4

User Interface and Display

The controller’s menu-driven user interface provides easy

access to the digital transducer settings via push button

controlsonthefrontpanel(Figure1).

The alpha numeric LCD display features a green back-lit

screen that is easily visible in low light conditions. The

5-digit LED display provides a clear readout of the

measured pressure.

Themulti-coloredsetpointindicatorsprovideaquick

and clear overview of the set point relay status. Units are

selectable and can be displayed in either Torr, mbar, or

Pascal.

The PDR900 features various display modes that allow the

user to display pressure in an analog bar graph readout

(Figure2)orshowsetpointstatusinformation.

Data Capture and Analysis

The built-in data logging tool allows the user to perform

measurementacquisitionsandeliminatestheneedfora

separate PC and software. The measurements are logged

to the internal non-volatile memory with a capacity of 450

measurements.

Thedataloggercanbeprogrammedtoacquiredata

from seconds to hours. The time stamped measurements

are either viewed on the screen or uploaded to a PC for

subsequentanalysisordataplotting(Figure3).

The data logger can also be used to perform and

document outgassing tests of vacuum chambers by

monitoring pressure rise over time.

Power Set Point Relays

The PDR900 has up to three power set point relays,

depending on the transducer type. The relays are

controlled by the transducer relay contacts, eliminating

the need for external power relays. The relay connector

hasterminalscrewconnectionsforquickandeasy

connectivity.

Digital and Analog Communication

ThePDR900isequippedwithanRS232userinterfaceas

a standard feature. The communication interface enables

remote control of transducer setup as well as transmission

of measurement data. The user interface is selected via

thecontrollermenu(Figure4).

Additionally, the transducer analog output voltage is

available on the rear panel of the PDR900 controller.