Chapter One: General Information Introduction
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Chapter One: General Information
Introduction
Purpose
The MKS Instruments Model PDR 2000 Dual Capacitance Diaphragm Gauge (CDG) Controller
displays vacuum pressure as measured from capacitance diaphragm gauges. The PDR 2000
supplies $15 volts at up to 0.75 amp; this is sufficient to operate most heated capacitance
diaphragm gauges. The PDR 2000 precisely measures the 0 to 10 volt signal from the CDG to
determine pressure. The Model PDR 2000 controller covers full scale ranges from 20 mTorr to
10,000 Torr. The PDR 2000 is housed in a 1/8 DIN enclosure and is simple to operate.
Figure 1 displays the PDR 2000 front view; Figure 2 displays the rear view and Figure 3
displays the dimensions.
Specifications
The PDR 2000 Dual Capacitance Diaphragm Gauge has the following specifications:
Useful Measuring Range
4 decades; full scale of 20 mTorr to 10.00 ktorr; full scale range selection is entered on the front
panel by the user.
• Display Range
• -9.9 torr to 10.00 ktorr; pressures higher than 10.00 ktorr display OFF.
• Display Resolution
Varies according to full scale range, from 0.01 mTorr to 1 Torr
Gauge Interface
The PDR 2000 incorporates a high-resolution input circuit, which allows the use of the capacitance
diaphragm gauge over its entire 4 decades.
• Input to the PDR 2000 Controller
0 to 10 volts for full scale of the gauge
• Units of Display
Torr (mtorr), mBar(Bar), arb (no units), Kpa, and (Pa) user selectable
• Full Scale
User selectable range to match CDG: 20, 50, 100mTorr; 1, 2, 10, 100, 1000, 5,000 and 10,000 torr
• Calibration Adjust
• For calibration of display; allows user to multiply CDG response by 0.50 to 2.00.
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