Service Manual
DS 350 GM
Rev A 05/01/01 // SB
190113_A
44
5.4
PROCEDURE 4. PRESSURE TRANSDUCER ZERO ADJUSTMENT
5.4.1 USING GRAPHIC CONSOLE FOR ZERO-SETTING OF PRESSURE TRANSDUCER
& FORCE INPUTS
The zero setting consists of defining zero-point offset. The zero point offset is added to the transducer
measurement to calculate the real physical pressure or force.
To define the zero-point offset the pressure transducer or force sensor must be in equilibrium (no load
condition). Therefore the boom must be lowered all the way down (no rest pressure) and the hydraulic
hoses disconnected from the pressure transducers.
CAUTION
: Ensure there is no pressure in the hydraulic line when disconnecting the hoses from
pressure transducers.
5.4.1.A ACTIVATING THE ZERO-SETTING FUNCTION
To activate the zero-setting Function, press the INFO key on the console to activate the INFO
Function. Now press the CTRL key. At this point, a five digit Authorization Number must be entered.
Only authorized personnel may adjust the zero-point settings.
Example: 6 4 3 5 6
5.4.1.B ZERO-SETTING THE TRANSDUCER INPUTS
Now, having successfully entered a valid password, the piston-side zero-point setting function is
activated.
The display shows which transducer (piston-side, rod-side or force) is being zeroed and a horizontal
dial marks the present pressure (or force) difference in %. By pressing the + key, the input pressure
(or force) is adjusted upwards, and by pressing the minus (-)key, the input value is adjusted
downwards. When the plus (+) and minus (-) keys are pressed simultaneously, the zero setting
occurs automatically. Manual adjustments may be preformed using + or -.
The return key toggles between the piston-side, the rod-side, and the force zero-setting.
When the operator is finished, pressing the EXC or INFO key returns the console display to normal.
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