DAkkS Accredited Calibration
For quality-relevant applications (ISO 9000ff)
To use our sensors in quality-relevant fields of applications (ISO 9000 ff.), periodical calibration is necessary. If needed, we ship Querx with an additional calibration certificate. This calibration is a high-class calibration, carried out by our DAkkS accredited partner laboratory.
Questions and Answers
What does the calibration process look like?
It makes sense, to calibrate the whole measuring chain at once. When ordering, just chose the unit and the sensors which you want to use. If you don't want to obtain the probes from egnite or our partners, you should make them available to us.
Do I have to send in the unit for a recalibration?
For a recalibration you can send unit and sensor by mail. If a high number of units need to be recalibrated, it is also possible to carry out the calibration locally.
Is it possible to only calibrate the temperature or humidity probe of Querx TH?
Yes, that is possible.
When should I choose 1-point-calibration and when 3-point-calibration?
This is dependent on several factors. As a general rule: Whenever you have to monitor a temperature range, you should calibrate the sensor with multiple calibration points on the boundaries of and within this range. If you only want to monitor a specific point, e.g. if you wantan alert going off if in a cold storage the temperature exceeds -18.0 °C, one calibration point is sufficient.
Can I calibrate Pt100-/Pt1000 probes from other manufacturers together with the unit?
Yes, but you should make them available to us. The calibration of the whole measuring chain is more exact and reliable.
Is it possible to calibrate sensor and unit separately?
Yes it is, but we strongly advice to calibrate the whole measuring chain.
What do you mean by “measuring chain?”
In the case of Querx PT, the measuring chain consists of the unit as transmitter and the Pt100 / Pt1000 probe, which you want to connect. Querx TH is already equipped with integrated sensors for temperature and humidity.
Calibration and Adjustment
Calibration is determining, if the measured values of a measuring device are within a specific tolerance range. For that, the values are compared to a reference value, which can usually be traced back to a national standard . Adjustment is to attune the measured values to this reference value. After adjusting, a recalibration is needed.
The German Metrological Institute (PTB)
The PTB is the highest German instance regarding any questions of metrology - the science of measuring. They define and keep national standards, the most popular of which is maybe the C2, better knows as Germany's atomic clock.
The German accreditation body DAkkS and the German Calibration Service DKD
Following a EU directive, the DAkkS was founded by the fusion of DACH, DKD, DAP and TAG to form a single German accreditation body. It assesses and evaluates (not only) calibration laboratories. If a laboratory is accredited, you can be sure that they operate informed and in compliance with standards and regulations. The German Calibration Service DKD was one of the predecessors of the DAkkS up to 2010 and is now a panel within the German Metrological Institute PTB, which is responsible for the cooperation with the accredited laboratories.
Accredited calibration and factory calibration
The accredited calibration is carried out by a laboratory, acknoledged by the National accreditation body (DakkS in Germany, A2LA in US, UKAS in UK). The used reference value can directly be traced back to the according national standard. It is internationally accepted and not only allows usage in quality-relevant field of application (ISO 900 ff.), but is suitable in situations, where special requirements to your measuring systems need to be met.
A factory calibration is carried out using a factory standard. It can be sensible if a company has an own calibration laboratory, allowing it to calibrate measuring equipment internally and at the location.