Dover OPW 88 Series - Page 15

Rack Monitor 88XX
Document: Operation Manual
Date: January 2024
Version: A.0 subject to change
Page 15 of 43 – Operations Manual
This flashing pattern is used to indicate the amount of dry
sensors. E.g. an 11 compartment tank truck is equipped
with 5-wire sensors. If all sensors are dry then the bottom
light bar will flash Green : 2 times long and 1 short pulse.
If a sensor becomes wet then the Bottom light bar will flash
Red, indicating which compartment has a pending overfill.
e.g. Compartment 7 becomes wet then the Red bottom light
bar will flash one long and two short pulses.
This light pattern is also used to indicate a few systems
errors. Not all error codes are indicated since it will be too
complicated. Please consider a 88XX rack monitor for all
possible Rack monitor, tank truck and sensor errors.
E.g. the rack monitor calibrates the inputs during power-up.
Therefore, nothing can be connected during calibration. The
rack monitor will show an error code “13” if it detects a load
on the pins during power up at the Bottom light bar. Top
light bar will flash fast (¼ Sec. on and off) to indicate an
error.
→

→

~2Seconds
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
13
DRY compartments
WET compartments or ERROR messages
500mS
Table 2