Climate monitoring in measurement rooms

Modern measurement rooms are used in many industrial companies for quality assurance purposes. However, since the materials change depending on the ambient climate, parameters including temperature and humidity must remain constant in order to obtain precise measurement values. This is defined in detail in the guideline VDI/VDE 2627. It also states that the monitoring of ambient conditions in a measurement room has to take place with suitable measurement technology.

Temperature, air humidity and pressure can be continuously measured and documented using the measurement data monitoring system testo Saveris. In addition to this, the monitoring system has an innovative function which informs you by alarm even before a limit value violation occurs. Apart from this, it offers interfaces for integrating further measuring instruments for the monitoring of the other parameters defined by VDI/VDE 2627.

 

The challenge

The demands placed on measurement rooms are high – after all, they represent a fundamental basis for product quality. Above all, stable ambient values are of crucial significance, since temperature and humidity fluctuations have a direct influence on the properties of materials. Shrinkage or expansion of only 1 µm can already have drastic consequences for later serial production.

As well as the quality class of the measurement room, the basis temperature defined for the respective measurement room and a relative humidity of between 30 % and 60 % are additionally relevant. Only this way can results be obtained which are always comparable and reliable. But how can you ensure that these parameters remain within the defined limit values, and that an unnoticed deviation does not endanger quality and cause unnecessary costs?

In addition to temperature and humidity monitoring requirements, measurement rooms (or metrology rooms) are usually maintained at a slight positive pressure, relative to the atmosphere. This reduces the chances of dust particles or humidity entering the room. Such pressure is usually measured in Pascals. Sensitive differential pressure transduces can be integrated directly into the Saveris system, thus ensuring it can monitor the differential pressure of the room as well as the temperature and humidity.

 

The solution

The measurement data monitoring system testo Saveris can reliably and automatically fulfil the continuous measurement of temperature and air humidity required by the guideline VDI/VDE 2627 for measurement rooms. Added to this is the innovative function “trend alarm” which makes monitoring climate even easier for you: It calculates the projected temperature development by linear regression over the last four measurement cycles, and provides you with an alarm even before a limit value violation occurs.

Here’s an example of this: You want to receive an alarm as soon as the temperature of your measurement room increases by 5 Kelvin within one hour. You have set the measurement cycle so that the temperature is measured every ten minutes. In the forty minutes between 17:01 and 17:40, testo Saveris measures a temperature increase of 4 Kelvin.

It calculates from this that in 60 minutes, a temperature increase of 6 Kelvin would have occurred – and therefore already issues you with an alarm by e-mail, SMS, alarm relay, audible signal or LED display after 40 minutes. This allows you to intervene before it is too late.

 

Testo Saveris – Server based monitoring system

Testo’s Saveris offers a comprehensive, yet easy-to-use indoor climate measurement system. In stationary operation, the transfer of the measurement data takes place via wireless and/or Ethernet connection to a base station. This documents and monitors all measurement data.

Data is available to view and settings can be configured on networked computers. Individual user access permissions can be assigned according to whether the user requires full administrative or simply viewer rights. In addition, data is also available to view via a web browser, so information is available 24/7 via any web enable device.

If limit values are exceeded, a whole range of different alarm options, such as SMS/e-mail alarm or alarm relay are available. Remote alarms can even be given when the system is not connected to a running PC. The base is the heart of testo Saveris and can save 40,000 readings per measurement channel independently of the PC. This corresponds to around one year of memory capacity at a measuring rate of 15 minutes.

 

Features / advantages of Saveris include:

  • Large internal storage
  • Alarm via LED, relay, SMS & email
  • Energy supply via mains, additional emergency battery for data security
  • Graphical display, 4 control keys
  • Up to 150 probes can be connected
  • Multiple interfaces: radio, Ethernet & USB

 

Want to find out more about testo’s Saveris?

If you have a potential requirement you would like to discuss you can call us on 01420 544433 and we’ll be happy to help. Alternatively, for more information please visit our website www.testolimited.com/server-based-monitoring-saveris

Check Also

Full-metal ultrasonic sensing from ifm electronic

Wet environments coupled with aggressive chemical cleaning can  make  non-contact ultrasonic distance measurement and level …

M12 cable connectors featuring K and L coding Designed for power applications in North America

Use in control cabinets for the North-American market requires specific testing and certification of the …