Page 40 of 42 pages
Difficulty:
Zero point unattainable - but instrument operates normally (Sensitivity)
Possible cause:
The instrument may have been subjected to a severe shock the zero point is dislocated
in the sensor head.
Remedy: ...LEVELTRONIC „classic“ A40 with LEVELMETER 25
1. Check the measuring base for damage. If damage is ascertained the instrument must be sent for re-
conditioning.
2. Connect the cable only to the connector „A“ of the LEVELMETER. Power on the LEVELMETER and
adjust the display to zero. Place the LEVELTRONIC on a horizontally set plate (within +/- 50 mm/m in
both directions) and connect to the cable.
3. Adjust the display to zero by using a screw driver size 00 on the potentiometer marked "zero" at the
instrument. (Fig. 13) If the above adjustment is impossible, the electronic unit is most likely
malfunctioning.
Do not use the potentiometer "GAIN" under any circumstances because high accurate adjustment
equipment is required.
FIG.
13
Remedy: ...LEVELTRONIC „NT“ 41 with LEVELMETER C25/DC
1. Adjust the display to zero by using a screwdriver size 00. (Fig. 13) If the above adjustment is
impossible, the unit is most likely malfunctioning.
2. Connect the cable only to the connector „A“ of the LEVELMETER C25/DC. Power on the
LEVELMETER and adjust the display to zero. Place the LEVELTRONIC NT on a horizontally set
plate (within +/- 50 mm/m in both directions) and connect to the cable.
3. Use the mode button "M" to enter the adjustment mode. Use the +/- keys on the LEVELTRONIC NT
to set the display of the LEVELMETER C25 to zero (see Fig. 13a). If the above adjustment is
impossible, the electronic unit is most likely malfunctioning.
FIG.
13A
4. A reset function is possible in case some unjust manipulation has been done.
Important: For this function a LEVELMETER 2000 has to be connected to the instrument.
The "M" button is to be pressed a short time only. After that both keys + and - must be pressed both
at the same time for 25 seconds
. When the reset has been successful the display on the
LEVELMETER 2000 changes from the actual value to the originally adjusted ZERO value.
After this the instrument returns to the measuring mode in the basic configuration.
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