Pentair HAFFMANS RPU-352, Instruction Manual, Page: 49 / 112

HAFFMANS RPU 352, RPU 353, RPC 80 RPC 50
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RPU 352, RPU 353, RPC 80, RPC 50 Page 49 of 112
updated every time files are printed out and then erased. (The software in the RPC-80 must be
version ‘p’ or later.) This makes it easy to maintain a plant-wide standard for date & time
without making modifications to all the monitors. The software used in the PC does not
currently offer this facility.
14) Why is the exit temperature sometimes not included in the results?
The moment that the instrument leaves the pasteuriser is judged by a rise in ambient light level
from the relatively dark interior. If there are inspection lights inside the pasteuriser or if for any
other reason the light level is too high inside the pasteuriser or too low outside it (where the
instrument exits) then the result may not be calculated. It may be necessary to improve the
lighting at the exit end of the pasteuriser particularly during night shifts.
The sensing sequence is triggered by the channel 1 temperature first rising above the PU cut-
off temperature and then falling below it again before the exit from the pasteuriser. If this does
not happen then the result is not calculated. (Channel 1 is assumed to read the temperature of
the product.)
The light sensor can be seen on the left of the instrument’s front panel between the two left
hand control switches, don’t cover this area with tape or adhesive labels.
15) Why doesn’t the date and time of my file appear on the display of the PU monitor? It
appears correctly on the printed results from my PC.
The date and time when the file recording started is shown on the first page of results only if the
instrument’s internal clock has been set. These extra items are shown alternately with the total
recording time. When the PC is used to print the results the clock in the PC is used as a
reference for the file timing.
If you wish to see the file start date and time on the display then you must set up the internal
clock.* See “Key Plug” section of the operating manual. As supplied the instrument’s clock is
not usually set. When a new exchange unit is fitted (which includes the battery) the internal
clock settings are lost.
* If the PU monitor is used with the RPC-80 printer/charger then the clock will be automatically
set or updated every time files are printed out and then erased. (The software in the RPC-80
must be version ‘p’ or later.) This makes it easy to maintain a plant-wide standard for date &
time without making modifications to all the monitors. The software used in the PC does not
currently offer this facility.