Step 4
The Rack monitor will apply power to the sensor and analyse the measured signal.
If no Two-Wire sensors are detected, power will be applied at channel 8 and a pulse will transmitted at pin 4
If a return pulse is detected the rack monitor will continue with Five-Wire sensors.
Note: When the Rack Monitor is connected to already wet sensors it cannot determine the parameters of that
sensor.
All measured data will be compared with the stored settings and dipswitch settings.
If the dipswitch is set to EN13922 the Rack Monitor will continue with step 5
If the dipswitch is set to ROW the Rack Monitor will continue with step 6
If the measure data not complies to the EN 13922 or ROW the rack monitor will continue with step 7
Step 5
If all sensors complies to the EN13922 standard and if all sensors are dry and a proper ground is verified it will
switch to permissive.
In case of Five-Wire sensor and channel 9 (pin 9) is still an open channel or in case of Two-Wire sensor and an
open channel 8 (pin 8) it will wait till the vapour recovery coupler is connected.
If everything is connected but one (or more) of the sensor(s) is (are) not conform the EN13922 the rack monitor will
go to NON-permissive and will indicate the error on the Oled-Display (88XX). Function key will be ignored since the
rack monitor is set to comply EN13922 directive
Step 6
If all (DRY) sensors are within ROW specifications and a proper ground is verified the rack monitor will go to
permissive. When the Dipswitch is set to 6 channels instead of 8 the rack monitor expect 6 dry channels on
terminal pin 3 till 8. terminal pin 1 and 2 will be left floating. (this with any Two-Wire sensor).
Note: If more than 6 Two-Wire sensors are detected when the 88XX is set to 6 channels an error will be shown
on the top bar of the OLED with the character ‘8’. This error can be bypassed to continue to loading
Step 7
If the 88XX Rack Monitor cannot determine the type and/or amount of sensors it will go directly to unknown sensors
detected and a bypass key is needed to continue. (See bypass chapter for details)
Firmware Upgrade
The 88XX Rack monitor is built for the future therefore new updates to expand the functionality of this rack monitor
can be expected. To upgrade your 88XX rack monitor switch off all power to the rack monitor. Remove the lid (see
installation manual for details) and if there is a memory card already placed at the lower right corner replace it with
the new card. (see Error! Reference source not found.). Close the door (see installation manual for details) and r
estore power. The rack monitor will copy the needed files from the card to its memory. The 88X4E lower bar will
flashing blue during programming and green during verifying the programmed software. Both bars will red if an
error occurs during programming. (Switching power off and on is needed). With an 88XX the channel LED’s will act
as a loading bar. Blue for programming, green for verifying Monitor will start the Led test If the programming is
successfully ended. See chapter “power up / Led test”.
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