Water bottom measurement
___________________________________________________________________________
Instruction manual VITO Page 41
5.4 Troubleshooting
5.4.1 Water error request (item EW)
Data item EW contains the most recent error code concerning the water probe measurement, encountered by the
optional HCU/ICU_HPI board.
xx00 No error, value at initialisation
xx01 C
test
error Either defective 762 VITO interface or defective (leaking) water probe
xx02 Linearity error Should be within 1% of the test capacitance, if too large, change 762 VITO interface
xx03 No water probe available Measured capacitance is >4000 pF; check water probe wiring (green wire and coax
cable) to 762 VITO interface terminals
xx04 Sub system error Defective 762 VITO interface
xx05 Capacitance too low Measured capacitance <50pF; check water probe wiring or change 765/766/768 VITO probe
xx06 Capacitance too high Measured capacitance >3000pF;check water probe wiring or change 765/766/768 VITO
probe
xx07 Capacitance shortcut Either water probe error or internal 762 VITO interface error
xx11 No reply on initial HART commands Communication error. Check connection level gauge – 762 VITO interface, or change
762 VITO interface or HCU/ICU_HPI board
xx79 Not calibrated Check items VR and VT (set to zero or are equal to each other)
xx98 No water sources found No water probe connected
xx: 24 for HPU emulation;
28 for HSU emulation;
30 for HCU emulation
5.4.2 Water level (ullage) status bytes
The water level and ullage, items LW and LH, are constructed as follows: s
0
s
1
IIIIIIIII
For decoding of the status bytes, refer to the ASCII table in appendix A.
IIIIIIIII : water level (or ullage) value; format according the level dimension LD.
s
0
s
1
: two status bytes, bit coded; containing the following information:
status byte s0 status byte s1
bit 0: general probe fail bit 0: water probe (0=present; 1= absent)
1: low water alarm 1: 0 (not used)
2: high water alarm 2: 0 (not used)
3: water below probe warning 3: 0 (not used)
4: water above probe warning 4: 0 (not used)
5: 0 5: 0
6: 1 6: 1
7: 0 7: 0
Note:
Only the bits which are to set to ‘1’ have an active status.
To Next Page
Loading...
Need help?
General
