WHAT MAINTENANCE IS NEEDED FOR AN MKS VACUUM GAUGE?

PROTECTING YOUR CAPACITANCE MANOMETER PERFORMANCE

Due to the structural design of the MKS capacitance manometers, little maintenance is needed to keep your instrument in tip-top shape. However, it is important to be aware of your surroundings when using a capacitance manometer to ensure accuracy and proper performance. In many cases, it is important to wipe the manometer down with a damp rag after use to keep it from particle buildup. Although capacitance manometers are relatively chemical resistant, users should be cautious when using halogen-based process and processes using oxidizing gases. Caution should also be used when using a manometer in the vicinity of electromagnetic forces. Most manometers are designed to have some degree of shielding to prevent interference, but if there is a high level of electromagnetic fields, the shield may not be enough. Because a capacitance manometer is an electronic device, any contact with a electromagnetic force could affect the equipment’s performance.

HOW TO KEEP YOUR MANOMETER ACCURATE

CALIBRATION

Capacitance manometers should undergo calibration on a regular basis. Because a manometer is an electromechanical device, calibration is required before installation, Manometers should also be periodically recalibrated to maintain accuracy and performance. If a user fails to recalibrate their manometer, there is a high risk of the performance window shifting. The consequences of a performance window shift could lead to reduced productivity, long periods of downtime or in extreme situations, complete shut down.

ZEROING

Zeroing occurs when the manometer output is adjusted to read zero. This can happen when the lowest pressure possible is achieved or when the there is a pressure lower than the resolution. Similar to calibration, zeroing has to be done before installation and periodically to ensure linearity. This is due to the impact gravity has on the position of the diaphragm.

It is important to note that every capacitance manometer is different. Because of the number of models available, it is vital for users to look over the manual to see what required maintenance is needed for that particular model, when zeroing should be performed and how frequently the instrument should be calibrated.

Do you know if your vacuum gauge is working up to par?
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