Dostmann P600 Series
Universally applicable microprocessor
controlled P600 series are ideal for measuring systems where
high system accuracy ( up to 0.03C) is essential to maintaining end product quality,
or where the possibility of on-line documentation is required.
Areas of application in industry and laboratory for example:
- For taking measurements for quality assurance under
ISO 9000
- As a reference instrument for checking production
- For taking comparison measurements in service and repair
- For registration of temperature in air conditioning
and
environmental engineering
- Long term monitoring of temperature with online documentation
measurements in laboratories
- Models for Temperature. Airflow, rH, Dewpoint,.... single & dual channel.
- RS232 interface for pc logging
- Multifunction models available for recording temperature,
humidity and airflow.
- Ex Models available
- 3 point system linearisation
- Some models available as dataloggers, supplied with dowload software & PC (RS232) cable
Service sets are available, click
here for details of the contents
To minimise measurement uncertainty of the complete system
(instrument and sensor) the P600 series measuring
instruments have a special calibration function which compensates
the sensor tolerances when a sensor is replaced. Sensors are tolerance calibrated
in our laboratory. The determined deviation is converted into a
hexa decimal code which is marked on the probe handle.
This code contains information of the sensor deviation at zero
point and span in relation to the respective DIN Standard
on which it is based.
The number code is simply entered and stored in the measuring instrument using either the front keypad
or the
software and interface. The instrument processor corrects the
tolerance of the measuring sensor defined by the number code
and corrects the measuring error resulting out of this. The corrected
measured value is displayed in the LCD.
The measuring instruments can be calibrated to uncoded measuring
sensors through a further instrument function by simple
physical compensation (comparison measurement). At the
same time this function can be used to easily correct any possible
drift error caused by ageing of the sensor, for example.
For
the physical calibration you can select either a 1, 2, or 3-point calibration.
To implement this function the measuring sensors to
be calibrated are immersed, for example, in two reference temperature
points (optional 1 or 3 points) one after the other and
the values entered into the instrument through the keyboard.
The instruments monitor the calibration process automatically
so that the operation is automatically broken off in the case of
references which are unstable, for example, in order to be able
to continue to use the previously valued correction values in
the rocessor.
To achieve good results only such references should be used
for calibration the maximum error of which are lower than
the specific error limits for the respective instruments by the
factor 3.
The DE-Graph software available for the measuring instruments,
permits simple, efficient administration of the various measuring
sensors and pertinent number codes and the transfer for readout
of the appropriate code on the measuring instrument.
As a result, the above-described calibration function eliminates
the influence of the sensor error to a great extent and permits
system accuracy which is about the same as the accuracy of
the measuring instrument itself.
The resulting high system measuring accuracy predestines the
measuring instruments for applications in quality assurance
and in-house calibrationlaboraratories.
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