MKS Baratron 622D, Руководство пользователя

Страница: 23 / 59

Chapter One: General Information Introduction
17
Chapter One: General Information
Introduction
Note Some Baratron
®
products may not be exported to many end user countries
without both US and local government export licenses under ECCN
2B230.
The MKS Baratron
®
Types 622B, and 626D Absolute Pressure Transducers are part of the MKS
family of general purpose pressure transducers designed to provide accurate, reliable, and
repeatable pressure measurements in the range from 1000 Torr to as low as 0.10 Torr F.S. (626D
only). These instruments are RoHS (Restriction of Hazardous Substances)-compliant, operate
with ±15 VDC (±5%) input voltage @ 35 mA or 75 mA, and provide a 0 - 10 VDC analog output
linear with pressure. All of these products expose only Inconel ® and Incoloy ® to the process,
permitting use with corrosive or dirty gases and eliminating contamination of the process with
transducer materials. Measurements are independent of gas composition and all of the units have
a minimum measuring range of four decades.
Using the latest single-sided, dual-electrode Inconel transducer design, coupled with a low
impedance, fixed-frequency bridge signal conditioner, these instruments are capable of
withstanding high overpressure conditions (45 psia) with minimal or no shifts in output over their
range. The advanced bridge signal conditioning technology provides high accuracy and operation
which is extremely temperature-stable at operating pressure.
Protection from RF interference and noisy electrical environments is increased by the use of a
metal case, by internal design elements, and by the use of surge and ESD suppression networks
and RFI filtering on all inputs and outputs.
The Types 622D and 626D transducers have an accuracy of 0.25% of reading, with the exception
of the 626D in its 0.10 and 0.25 Torr ranges, which has an accuracy of 0.50% of reading. Type
626D products with ranges of 10 to 1000 Torr may also be ordered with an optional accuracy of
0.15% of reading. The 622D and 626D models are identical except for their electrical connectors;
the 622D unit has a 5-post terminal block connector, and the 626D unit has a 15-pin D-
subminiature connector. These instruments have been developed for applications requiring a
small, economical transducer, which delivers accurate and repeatable measurements with a
resolution of 1 x 10
-4 F.S.
The Type 623H instrument adds two (2) trip relays that can be individually adjusted to activate or
de-
activate between 0.1 and 100% of the Baratron’s full -scale measurement range. It is available
in ranges from 10 to 1000 Torr, and has two (2) terminal blocks for connection to the host system.