PowerMeasuringModule PMM
35,0(6
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Revision 13 EN - 02/2023
11.3 Variables
The data generated during the measurement is stored in the variables. The measured temperatures are
updated faster than 1Hz and the measured energy, power and irradiation time are updated once in every
measurement cycle.
Remaining capacity Shows the remaining thermal capacity of the absorber. Do not use more energy for
the next measurement than specified in this variable. When exceeding the amount of
energy, the absorber is overheated.
(Starting at 80˚C absorber temperature: remaining capacity = 0)
Absorber temperature The current temperature of the absorber. This value is for information only.
Housing 1 temperature The current temperature of the housing. This value is for information only.
Housing 2 temperature The current temperature of the housing. This value is for information only.
Housing 3 temperature The current temperature of the housing. This value is for information only.
Measured Energy Display of the measured energy of the last measurement.
Measured Power Display of the calculated laser power of the last measurement. The laser power is cal-
culated from the irradiation time and the measured energy.
Measured irradiation time Display of the irradiation time of the last measurement.
Only for devices with AP3s marking on the identification plate:
Measured Ontime Display of the measured laser ontime of the last measurement.
Measured Offtime Display of the measured laser offtime of the last measurement.
Measured Count of
pulses
Number of measured pulses of the last measurement.
Tab. 11.4: Overview variables
11.4 Status information
The current status is shown in the status bits. The status bits are organized in 2 status bytes:
Ready for Measurement The PMM is ready for measurement.
Measurement running The laser has emitted a pulse onto the PMM. The PMM is evaluating the measurement.
Measurement finished The measurement cycle is finished, the measurement results are provided in the cor-
responding registers.
Absorber too hot The absorber is too hot for a further measurement. It has to cool down until the tem-
perature is below the maximum absorber temperature.
Hint: The bit indicating an excess temperature only displays that no further measure-
ments are possible at this moment.
An active bit after the measurement does not display an error and is reset within a
minute.
PMM is idle The PMM is in its initial state and is waiting for instructions.
Irradiation failure The measurement of the irradiation time has detected an interruption of the laser power
during the laser pulse. This bit is for information only.
Start acknowledge The “start measurement” signal has been identified and can now be deactivated. The
measurement standby is activated.
Shutter acknowledge The “open shutter” and “close shutter” signal is identified and can now be deactivated.
Shutter is open The shutter of the PMM is open.
Tab. 11.5: Overview status
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