Bypass Operation
Although it is not recommended, the 88XX can also be bypassed in a faulty or wet sensor condition. If the monitor
is NOT set to EN13922 then shorted between channels can be bypassed. Shorted channels to ground cannot be
bypassed with the blue key.
A special bypass key (red) has to be used to switch the 88XX in total bypass mode. Open and shorted channels
can be bypassed but only if proper earth connections have been established and earth can only be bypassed when
all sensors are dry. Special provisions should be made to make sure the truck with the compartments are able to
discharged the build-up static electricity. If the monitor is set to emulate the 8130 then, for extra safety the bypass
function will be active for 40 minutes. The rack will switch to nonpermissive if the bypass trimer has expired.
The 88XX bypass routine is able to bypass more than one event (“stackable“ bypass). This means every time a
non-permissive situation occurs (except ground verification) the rack monitor can be set back to permissive to load
by placing the bypass key in the designated location (see above for details). The wet or faulty condition will stay
visual until the plug is disconnected from the truck socket.
NOTE: The 88XX Rack Monitor will revert to normal operation as soon as the plug is disconnected from the truck
and ready to service the next load.
Operational Function (Blue) Key
It might happen that during use of the Rack Monitor 88XX some functions must be bypassed to continue working.
For examples :
- Wet sensors,
- Out of specifications,
The procedure to Bypass the (above) operations is as follows:
• A symbol, a small hand on the Function Key indicates the active area of the key. This symbol corresponds
with the small hand in the middle bar of the Rack Monitor 88XX
• To activate the key, it must be placed in the corresponding slot marked with a small hand. Make sure hand
next to the slot middle bar stays visible
• As soon as the Rack Monitor receives a valid infrared signal the two blue indicators in the second bar will
change from flashing to a steady light for 3 seconds. Function key will also be shown at the upper-left
corner of the display. (88X0 version Only).
• The received data is processed and the necessary action will be taken. If the Rack Monitor enters the
bypass function two yellow LED indicators behind the Function Key will start flashing. The key can be
removed as soon as the Blue indicators restart flashing. any additional use of the Function Key is not
shown on the yellow indicators once the Rack Monitor has entered the Bypass Function (stackable bypass)
Stackable Bypass Function
This stackable Bypass function differs from the bypass function of all our previous Rack Monitors.
It will bypass the occurred error instead of bypassing the rack monitor. For example, compartment 2 of a tank truck
equipped with 2-Wire sensors becomes wet during loading. The Rack Monitor will switch to Non-Permissive, trying
to avoid an overfill situation. The loading arm connected to compartment 2 must/will be disconnected and the
adaptor closed. At this moment the overfill detection of compartment 2 can be bypassed with the blue key. The wet
sensor at compartment 2 will be ignored and as soon as a another compartment sensors becomes wet it will shut
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