Manual EDM 180
Revision 1.0 29.03.2010 Page 53/61
8.4 RS-232 transmission of measured values
The firmware 7.xx outputs the mass concentration values because of its resolution of 0.1 μg/m
3
with the
multiplication factor of 10! At each intervals´ end happens the output of the measured values with their
according measurement pre-information. When illustrating the mass, the averages of the storage interval
will be transmitted. The measured values are being designated with "N" for mass, with "_" for the
averages, and "," for the factor 10. Allocation of the columns see command "J".
The measurement pre-information in the with „P“ beginning line accord to the bytes which are being stored
in the data storage. The resolution of the external voltage is 10 Bit, so that the Bytes designated with
Ue1...Ue4 embody only the more significant part. The two low order Bits are both located in UeL. Bits 6
and 7 belong to Ue4, Bits 0 and 1 to Ue1. Because the maximum value of these voltages is 10V, the
10Bit-value has to be multiplied with the factor 9.776E3 in order to reach the voltage value as Volts. Since
different user texts and factors can be set on the device, they should be requested and regarded by the
analysis software. The user factors always relate to the voltage value in Volts. At the version 7.xx the
gravimetric factor is 100, so that the resolution is 1%. The supply voltage as well as the magnetic valve
current will be output as percentage. The order is like following:
Year – Month – Day – Hour – Minute – Location (1..99) – Gravimetric factor *100 – Error code - Supply
voltage [%] – Magnetic valve current [%] – Sensor LowBits – Sensor 1 to 4 – Storage interval
Sensor4 (Ue4) is always the barometric sensor.
After the measurement pre-information follow the measurands. The measurands are designated with
„N_,“.
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