Preparation For Measurement; Power On/Off - geo-FENNEL FET 220 Mode D'emploi

OPERATION

PREPARATION FOR MEASUREMENT

Level and centre the instrument precisely to ensure an optimum performance.
Setting up the instrument and the tripod
Extend the tripod legs to a suitable height and tighten the locking screw. Attach the instrument onto
the tripod carefully. With the tripod centring screw slightly loose move the instrument across the tripod
head until the laser plummet is in coincidence with the ground point.
Level the instrument with the circular bubble. Use the footscrews 1 and 2 to move the bubble of the
circular vial until it is centred. Use footscrew 3 to move the bubble to the centre of the vial.
Accurately level the instrument with the plate level
Release the horizontal clamp and rotate the instrument until the plate level is parallel with the footscrew
1 and 2. Centre the plate level using the same two footscrews. Turn the instrument by 90° and centre
the bubble using footscrew 3. Repeat this procedure until the plate level is centred in all positions.
Take care of the relation between the direction of rotation of the footscrews and the moving direction
of the bubble.
POWER ON / OFF
Press the power button for 1 sec. An audio signal sounds followed by a test period of about 2 seconds.
All segments are displayed on the LCD to confirm that the instrument is ready for use.
Press and hold the power button for 2 seconds to power off the instrument.
HORIZONTAL ANGEL O-SET
· Aim at target "A" using the crosshair of the telescope.
· Press the "0SET" key twice to set the reading of the horizontal angle 0°00' 00" .
· The "0SET" key is only effective for the horizontal angle.
· The horizontal angle can be set to "0" at any time except in the HOLD mode (HOLD key).
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