MKS Stabil-Ion 370 Series, Instruction Manual, Page: 59 / 122

4-1
Series 370 Stabil-Ion Instruction Manual - 370119
Chapter 4
4 Preparing the Stabil-Ion System for
Operation
4.1 Preparing for Pressure Measurement with the Stabil-Ion Gauge
The steps in this Section (4.1) assume:
■
Your Stabil-Ion System has been properly set up and installed per the instructions in
Chapters 2 and 3.
■
The gas in your vacuum system is air or N
2
. For other gases you must follow the
instructions in Section 4.3.3.3 on page 4-9 for using Stabil-Ion Gauges and in Section 4.7
on page 4-18 for using Convectron Gauges.
■
That you are reasonably familiar with the general theory of operation of hot cathode
ionization gauges and thermal conductivity gauges.
■
We recommend you consult a good text book if you are unfamiliar with vacuum
technology or require more information on the general theory of operation of an
ionization gauge or thermal conductivity gauge. Extremely useful information is provided
in the following references.
■
Dushman, S., Lafferty, J. M., Scientific Foundations of Vacuum Technique, John Wiley &
Sons, Inc., Second Edition, New York, 1962.
■
Redhead, P. A., et al., Ultrahigh Vacuum, Chapman and Hall, London, 1968.
■
O'Hanlon, J. F., A User’s Guide to Vacuum Technology, John Wiley & Sons, New York,
1980.
4.2 Stabil-Ion Gauge Calibration Memory
The Stabil-Ion Gauge is the first ionization gauge with sufficient long term stability to justify storing
calibration data in memory. In the Series 370 Stabil-Ion System, each Gauge tube is individually
calibrated and supplied with memory matched to its own calibration data. This data is stored in a
Memory Module, which is supplied with the Gauge tube.
New data for each gauge is transferred to the internal memory using a Memory Module and the
Data Port. The data is individually serialized to match the gauge serial number, which is printed on
the gauge, the Memory Module label and is stored electronically in the memory. See Section 4.15
on page 4-37 for memory Serial No. display. If the Memory Module is not loaded for a gauge, see
Section 4.3.2 on page 4-5 for loading.
If the Stabil-Ion Gauge is calibrated for a gas type other than N
2
(or air), we suggest using a label
from the installation kit (Figure 1-3 on page 1-2) to indicate on the front panel the specific gas used
for calibration.
Turn ON the Stabil-Ion System by pressing the Control Unit Power switch. See Figure 4-1. The LED
will illuminate.