GUILCOR AR004926, Инструкция по эксплуатации, Страница: 51 / 75

51
Operation and maintenance recommendations
Device operation in various applications _______________
Before application it is necessary to consider if Multilogger is suitable
for required purpose, adjust optimal configuration and create
instructions for its periodical metrological and functional inspections.
Since the Multilogger can be powered from the power mains, it is
necessary (depending on the character of the application) to
secure the appropriate electric revision of its installation and its
regular inspections.
Unsuitable and hazard applications: The Multilogger is not designed
for applications, where failure of operation could cause endanger of
health or function of other life supporting devices. In applications,
where failure of Multilogger could cause loss on property, it is
recommended to amend system of independent indication device to
monitor this state and avoid damages. You have to be especially
careful with regard to the alarm output with a connected external
audio unit, functionality of which is depended on external power
supply source.
Locations of temperature sensors: place them to locations with
sufficient air flow and where most critical point is supposed (in
accordance with application requirements). The sensor has to be
sufficiently inserted into the measured area or sufficiently connected
to it in some other way, thus preventing the measured values to be
influenced by undesired heat coming from the conductors.
When
monitoring temperature in an air-conditioned warehouse, do not place
the sensor in the path of the direct air flow from the air-conditioning
units. The thermal field can sometimes be very inhomogeneous (for
example, in large chamber refrigerators) and the deviances can reach
up to 10
°C. Similar deviances can be found in deep freezers (used,
for example, for freezing blood etc.).
Locations of humidity sensors depend on the application
requirements. Measuring humidity in the refrigerators that do not have
an additional humidity stabilization system can be very problematic.
When turning a cooling system on/off, significant humidity changes
amounting to several tens of percentage points can occur even
though the mean humidity value is correct.