Regular inspection and maintenance by a trained vympel technician is the best way to keep your analyzer in top condition and ensure the longest service life.
It is recommended that maintenance be carried out annually. Regular maintenance consists of:
• Visual inspection of the analyzer's overall condition
• Check /reset operating settings;
• Clean the measurement cell, including the condensation mirror
• Check the performance of the Peltier element
• Update the software (when update is available)
• Confirm calibration / recalibrate the analyzer
• Check the performance of the rechargeable battery (for portable devices)

The metrological characteristics during the inter-verification interval comply with the established standards, subject to the operator observing the rules for storage, transportation and operation specified in the manual.

VympelCare service is available several times a year and provides for complete regular maintenance and calibration for a special offer;

CONG Prima-2M or FAS should be stored in the containers in which they were delivered. These containers protect the instruments from mechanical damage, contamination, and the effects of aggressive media. 

If you are storing a Hygrovision series portable analyzer, first be sure that the battery is removed from the device. Then the analyzer should be stored in its carrying case, which is specially designed to protect the device and its components. 

All Vympel analyzers should be stored indoors, under conditions that ensure protection from mechanical damage, dirt, and exposure to aggressive environments, and extremes of climate, such as extremes of temperature or humidity.

Vympel analyzers may be stored in their containers for up to 6 months. If analyzers are to be stored for over 6 months, please contact Vympel for further assistance.

There are no components in a Vympel analyzer that are designed to require regular replacement. For this reason, there are no spare parts recommended.

The recommended calibration interval is every twelve months or once a year. This is usually carried out at the same time that regular maintenance is undertaken. Check out the VympelCare page for a special offer on calibration and maintenance.

Yes, it is possible for an authorized Vympel technician to calibrate a Vympel analyzer on site. For further details, go to calibration.

No. Vympel chiller-mirror analyzers are not subject to drift. Dew point temperature measurements taken using a chilled-mirror hygrometer, such as those produced by Vympel, are first principle direct measurements of a physical property of a gaseous media. As such, these measurements are not subject to drift..

The water dew point is the temperature at which water condensation and water evaporation are at equilibrium for a given pressure. The hydrocarbon dew point, also known as the hydrocarbon condensation temperature, is the temperature at which potential hydrocarbon liquids transition to the second phase (liquid). 

Because of the particular nature of hydrocarbon condensation behavior, there is a pressure that corresponds to the highest hydrocarbon dew point temperature. This pressure is known as the “cricondentherm”.

Gaseous media condense to form a liquid at a given temperature depending on the pressure they are under. In the case of water vapor, as the pressure increase, the temperature at which a given amount of water vapor will condense to liquid goes up; in other words, as the pressure goes up, the dew point temperature goes up.

In the case of hydrocarbons, however, this pattern of increasing temperature corresponding to increasing pressure reaches a maximum at a specific pressure. As the pressure increases beyond this point, the condensation temperature actually goes down again. “Cricondentherm” is the term for the specific pressure that corresponds to the maximum condensation temperature of a hydrocarbon. Each hydrocarbon has its own cricondentherm, and mixtures of hydrocarbons, such as those found in natural gas likewise have a unique cricondentherm. In order to harmonize measurement results in the real world, the operational cricondentherm for natural gas applications has been established as 27 bar.

When water condenses, it forms tiny droplets due to water’s very high inherent surface tension. Hydrocarbons, on the other hand, condense to form a smooth shiny reflective film, due to low surface tension. This difference in condensation behavior makes it possible for Vympel analyzers to measure both the water dew point and the hydrocarbon dew point with one measurement cell.

Yes. Vympel technology takes advantage of differences in the way water condensation and hydrocarbon condensation behave to be able to measure the water dew point and hydrocarbon dew point using the same measurement cell. For a more detailed explanation of how Vympels chilled-mirror technology works, please watch the Vympel Analyzers Video on the Analyzers page.