Vega MINITRAC 31 Operating Instructions Manual page 11

Supplementary electron-
ics module - PROTRAC.
ZE
Mounting accessories
Device cooling
Gamma modulator
MINITRAC 31 • Foundation Fieldbus
The electronics module can only be exchanged by VEGA service
technician.
The supplementary electronics module PROTRAC.ZE... is a replace-
ment part for radiometric sensors MINITRAC 31.
It is located in the lateral adjustment and connection compartment.
Brackets and special mounting accessories are available for mount-
ing the MINITRAC 31.
For mounting on pipelines, there are corresponding clamp brackets.
Contact our sales staff.
The radiometric sensor has temperature limits which must not be
exceeded. In case the max. permissible temperature is exceeded,
faulty measurements and a permanent damage of the sensor can be
caused.
You have several possibilities to avoid too high ambient temperatures:
Passive sun shade
Direct sun increases the temperature on the sensor by 20 °K. The
best possibility to protect the sensor against the effects of direct sun
is a suitable roof structure.
If this is not possible or only with great effort, then you can use the
passive sun shade. The passive sun shade consists of a housing sun
shade and a sun protection hose and can reduce the sensor tempera-
ture by 10 °K.
Air cooling
For ambient temperatures up to +80 °C you can use an air cooling.
The cooling air is generated with vortex coolers. Please check if suf-
ficient compressed air is available. You can find further information
in the supplementary instructions of the air cooling. The air cooling
cannot be retrofitted.
Water cooling
For ambient temperatures up to +100 °C you can use a water cool-
ing. Please check if sufficient cooled water is available. You can find
further information in the supplementary instructions of the water
cooling. The water cooling cannot be retrofitted.
In order to exclude external interference radiation, you can mount a
gamma modulator in front of the source holder. This allows reliable
measurement even when interference radiation occurs.
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