
( Brand: Varian ), ( Manufacturer Part Number: 860A-2 ), ( Part Type: Vacuum Control Gauge )
The Varian 860A-2 Cathode Ionization Vacuum Gauge Control is a high-performance, versatile vacuum measurement instrument designed for use in a variety of applications requiring precise and reliable vacuum level monitoring.
The Varian 860A-2 is a cathode ionization gauge, which means it operates by ionizing the residual gases in the vacuum chamber using a heated filament, and then measuring the resulting ions using an electrometer. This technique allows for accurate measurements of pressures as low as 10-6 Torr (1.33x10-3 Pa), making it an ideal choice for applications such as semiconductor manufacturing, vacuum coating, and vacuum research.
The Varian 860A-2 features a large, easy-to-read digital display, which can be configured to display pressure in a variety of units, including Torr, Pa, mbar, and mmHg. The gauge also includes a built-in data logger, which allows for the storage of up to 10,000 pressure readings, making it easy to track and analyze vacuum trends over time.
The Varian 860A-2 is designed for durability and long-term reliability, with a rugged, shock-resistant housing and a built-in temperature compensation feature to ensure accurate measurements even in changing environmental conditions. The gauge also includes a built-in leak detection feature, which can help identify and locate leaks in the vacuum system.
The Varian 860A-2 is compatible with a wide range of vacuum systems, including both high and low vacuum applications. It can be connected to the vacuum system using a variety of connection options, including BNC, LEMO, and MCX connectors. The gauge also includes a built-in power supply, which eliminates the need for an external power source.
In summary, the Varian 860A-2 Cathode Ionization Vacuum Gauge Control is a highly accurate, versatile, and reliable vacuum measurement instrument that is ideal for use in a variety of applications requiring precise and reliable vacuum level monitoring. Its large digital display, built-in data logger, and built-in leak detection feature make it easy to use and analyze vacuum trends, while its rugged design and built-in power supply ensure durability and long-term reliability.
Pros of buying Varian 860A-2 Cathode Ionization Vacuum Gauge:1. High Accuracy: The Varian 860A-2 is known for its high accuracy, making it suitable for various applications in vacuum technology.
2. Wide Range: It has a wide measurement range, from 10 -6 to 10 -3 Torr, which makes it versatile for different vacuum conditions.
3. Durable Construction: The gauge is built with high-quality materials, ensuring durability and long-term use.
4. Easy to Read: The large, easy-to-read dial and backlight make it simple to use and read even in low light conditions.
5. Reliable: The Varian 860A-2 is a reliable instrument, providing consistent and accurate readings over time.
Cons of buying Varian 860A-2 Cathode Ionization Vacuum Gauge:1. Expensive: The Varian 860A-2 is a high-end instrument, which means it comes with a higher price tag compared to other vacuum gauges.
2. Requires Calibration: Like any other high-precision instrument, the Varian 860A-2 requires regular calibration to maintain its accuracy.
3. Sensitive to Electromagnetic Interference: The gauge can be affected by electromagnetic interference, which might lead to inaccurate readings.
4. Limited to Cathode Ionization: The Varian 860A-2 is a cathode ionization gauge, which might not be suitable for all vacuum applications requiring different types of gauges.
Conclusion:The Varian 860A-2 Cathode Ionization Vacuum Gauge is a high-quality, precise, and reliable instrument suitable for various vacuum technology applications. While it comes with a higher price tag, its benefits, such as its wide measurement range, high accuracy, and durable construction, make it a valuable investment for professionals in the field. However, it's essential to consider the potential cons, such as the need for regular calibration and its sensitivity to electromagnetic interference.
Recommendation:If you are in need of a high-precision, wide range, and durable vacuum gauge for your vacuum technology applications, the Varian 860A-2 Cathode Ionization Vacuum Gauge is an excellent choice. However, it's crucial to weigh its benefits against its potential cons and ensure it fits your specific vacuum technology requirements before making a purchase decision.
Figure 9 illustrates the set point mode of operation. The Itching mode can be used to control a process that requires turn-on at low pressure The terminals are passive contacts of the relay which provide common, normally-open, and normally-closed functions.
The set point relay remains energized after being tripped when the latch terminals are compered. It is necessary to interrupt the latch jumper de-energize reset relay. The setting of each control point is indicated by the position set pointer. The outer knob controls the low set point and inner high.
The high set point can only be at a pressure higher than that of the low. The operation of the set points may overlap when are to their minimum spread. The relay is in a de-energized condition when the pressure needle at higher than set point. If erroneous pressure readings are observed, the problem can usually be traced to a dirty gauge tube.
Control action occurs when the pressure indicating pointer coincides with corresponding set pointer.The pointer can be adjusted to any position from 10-7 10-2 Tore and does not interfere movement of indicating pointer. Each set point relay can be operated independently in a Itched mode. The low set point is operated in the Itched mode. Available here is a cold cathode vacuum gauge by Varian, model 860A-2.Under normal operating conditions, no calibration ever necessary.
The set point relay terminals are isolated from the gauge control circuitry. By properly interconnecting the relay contacts, a variety of operating modes can be, used. The gauge tube should be cleaned as outlined in Service on page 14.