4.2 Controlling the PM100A
15
To preconfigure or edit a wavelength item, navigate to it and keep the OK key
pressed until the last digit gets underlined. Set the desired wavelength with the
keys and confirm with OK.
When selecting a wavelength that is not applicable for the connected sensor a
warning sound will appear and the unit will keep the previous wavelength setting.
Wavelength setting in remote operation will overwrite the down to the right value.
Figure 6 Wavelength Correction
4.2.3.3 Zeroing
Confirming the ZERO menu item with OK, the unit performs an automated zero
adjustment and from now on takes into account this zero level for the power readout
calculation. This feature is used to zeroing thermal sensors, performing dark current
adjustment on photodiode sensors or suppressing small ambient light levels. When
the initial power level is too high, a failure message will appear that is prompting to
cover the power sensor prior to zero adjustment.
Indicator that sensor
needs to be zeroed
Perform zeroing: OK
Figure 7 Zeroing
Do not hold a sensor in the hand, especially a thermal sensor, when
performing a zero adjustment. Temperature effects will influence the
quality of the zeroing result!
When measuring very small power levels dark current of photodiode sensors or zero
voltage on thermal sensors will have an influence on the measurement result and
must be compensated by the zero adjustment. An indicator that a sensor needs to
be zeroed is when with covered sensor either a negative power reading or a reading
much greater than zero is displayed. At negative power readings additionally a
„ZERO!‟ warning appears in the status display.
To Next Page
Loading...
