Dilution Instruments - TESTO CU-2 User Manual

6 testo NanoMet Operation
Fig. 6.5: system configuration tab
6.3.2.

Dilution Instruments

As secondary dilution unit PND2 only the testo ASET15-1 Air Supply / Evaporation Tube can be
selected or not.
The testo MD19-3E is intended as primary dilution unit PND1. testo MD19-3E supports extended
remote control functions like to control the primary diluter temperature and the raw gas pump by
the testo NanoMet software as well as it is possible to read raw gas temperature and pressure
and several error informations by testo CU-2 Digital Control Unit. The testo NanoMet control
panel is added by these additional functions if testo MD19-3E is selected as primary diluter.
Along with the Rotating Disk Diluter version the rotating disk type has to be selected. The
10 cavities disk serves to realize lower dilution factors while higher dilution factors are achieved
using the 8 cavities disk, as it is described in the testo MD19-3E user manual.
The 'use fr or standard calibration' menu in the system configuration tab shown in Fig. 6.5 allows
to set if measurements should be performed using the attached devices applying their standard
calibrations, or if PMP compliant calibrations according UN-ECE R83 should be applied.
By clicking the 'change' button the calibration factors settings window shown in Fig. 6.6 can be
opened to insert the calibration data out of the documents delivered with the dilution components
to the testo NanoMet software.
As standard, the instruments are calibrated individually. The more extensive and more detailed
PMP calibration is done with the components combined to one system.
For setting up the system according UN-ECE R83, the nominal primary and secondary dilution
factors have to be approximately determined. The best fitting dilution settings out of the
calibration certificate have to be selected and entered into the corresponding fields of the
calibration factors window, together with the PCRF determined in line with these values during
the calibration procedure.
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