SI 675
Issue B
EDI 8262
Telescopic cranes with derrick pressure sensors CALIBRATION W2245
21
The pressure sensor must still be unconnected to the hydraulic line.
Then, in the control box or the amplifier box, temporarily connect the
black and white wires of the full side pressure sensors together.
Scroll down to 8 - SPAN PRES BORE and press ENTER. The reading
on the bottom represents the bits out of 1023 as seen by the control
unit. The reading should be above 670 and not exceed 875. Press
ENTER. The value to enter is engraved on the pressure sensor below
the label. A typical value will read: CAL 285.6 BAR. Enter the value
engraved on the pressure sensor. If there are two lift cylinders and one
pressure sensor on the full side of each cylinder, collect both calibration
values engraved on the sensors and average them. Enter the averaged
value as the span calibration value. Press ENTER, then press ENTER
again to confirm. Restore the black and white transducer wires to their
original connections and reconnect the hydraulic line.
If the bits reading is below or above the recommended values and the
pressure sensor is connected directly in the control box, change the
amplifier jumpers. Refer to the relevant amplifier table earlier in this
manual.
4.2.8.3 Pressure Sensor Span (Rod Side)
The pressure sensor must be disconnected from the hydraulic line.
Short the black and the white wires of the rod pressure sensor. Scroll
down to 9 - SPAN PRES ROD and press ENTER.
Repeat calibration procedure as defined for the bore side transducer
above.
Calib:#2
↑
- #4
↓
9 – Span Pres Rod
