Mahr GmbH, MarSurf M 300 and RD 18
56
9.2 Replacing the Battery
The maximum capacity of the built-in battery
gradually decreases over a long period of use.
Consequently, it is a good idea to replace the
battery after around two to three years.
The battery should only be replaced by
trained specialist staff.
For the MarSurf M 300 only a Ni-MH bat-
tery set with 5 × 1,2 V / 4200 4,200mAh
(7042076) may be used for the
MarSurf RD 18 a Li-Ion battery with
3.6 V / 700 mAh (3018466) must be
used.
Otherwise the instruments may be de-
stroyed.
To replace the MarSurf M 300 battery:
1. Position the MarSurf M 300 with its bottom
side up.
2. Move the reset switch (12) to the left into
the "0" position to disconnect the MarSurf
M 300 completely from power.
3. Use a Phillips screwdriver (e. g. PH 1×80) to
loosen and remove the two screws on the
battery compartment (15), then remove the
battery compartment cover.
4. Carefully pry the battery set out of the bat-
tery compartment with a small screw driver
or something similar.
5. Simultaneously unclick the plug from its
locked position and disconnect it.
6. Insert the plug of the new battery set into
the M 300 until it clicks into place in the
locked position.
7. Position the new battery set (7042076) in
the battery compartment. Place the cable
such that it will not be improperly jammed
in.
Checking the Integrated 9.1 Standard
of the RD 18
To determine the Rz value of the integrated stan-
dard:
1. Position a suitable surface texture meas-
uring instrument (e. g. Perthometer S2, drive
unit PZK, skidless pick-up MFW) such that
the pick-up is positioned on the integrated
standard and a traversing length of 5.6 mm
can be measured (see Fig. 15).
2. Set traversing length Lt = 5.6 mm (0.224 in)
on the meas uring instrument.
3. Perform one or several meas urements and
read off the measured Rz value in each
case.
4. Average over the measured Rz values.
5. Enter the calculated Rz value in the MarSurf
M 300 as the nominal value (see Section 6.2)
and cancel the calibration with the
button.
Fig. 15
Checking the integrated standard
66 Integrated standard
67 Separate skidless pick-up
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