Input basic programming data
40
BOB operation (operation without constant
supervision)
The operation without constant supervision is safety-relevant when
using the device to determine water hardness and monitor steam
boiler systems in accordance with TRD 604.
If the BOB function is programmed, the device continuously checks
the available quantity of indicator.A calculation using the following
data is performed to determine whether sufficient indicator exists for
the next 72 h: purge cycles, current indicator fill level, interval pause
set, and the average measurement value of the previous 10 meas-
urements.
BOB operation selection
Select in the menu => Basic program => BOB
Select "Function on"
Confirm the input with "OK"
BOB ON: Continual checking of the remaining indicator amount.
Alarm message "Indicator low" when dropping be-
low the minimum quantity for the BOB period: BOB flash-
es, output ALARM is switched.
BOB off: No BOB function. Monitoring of remaining indicator only to
ascertain minimum quantity (fill level 10%)
Example:
BOB period = 72 hours
Number of analyses per hour = 10
Required quantity of indicator for 72 h = 72 h x 10 analyses/h x (3 x
30) μl/analysis = 64.8 ml.
(which equates to around 13% fill level of a 500 ml bottle)
Operating mode for BOB operation
In operating modes "Volume interval" and "Volume and
Time" no BOB operation is possible! Select only the "Time con-
trolled"operating mode!
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