6. Care and Maintenance
21
Your ZFG 3.0, ZFG 3.1 or ZFG 3000 is an electro-mechanical precision instrument. To ensure reliability
and a long service life, please observe the following instructions:
• After each measurement process, remove any debris, such as soil, sand, clay or dust from the
bearing plate with the mounting pin and the loading device with the drop weight using a dry
cloth.
• Make sure that the bellows tightly enclose the springs to prevent dust and dirt from entering.
• Remove stubborn dirt with methylated spirits or kerosene. Do not use oils or grease!
• Transport and store the drop weight device protected from shock or impact, dry and with the
transport safety lock engaged.
• Remove damp objects (e.g. cleaning rags) from the device and from the transport case.
• Avoid prolonged exposure of the electronic settlement measuring device to sunlight.
• Occasionally check the drop height specified on the calibration record and the calibration plate.
6.1 Changing the Battery (ZFG 3.0, ZFG 3.1)
• Open the battery compartment on the rear of the device by removing both screws (to do this,
carefully slide the protective seal downwards).
• Remove the old batteries and replace them with new ones. Instead of the original disposable
batteries, rechargeable batteries (4x1.2 V) can also be used. In this case, a slightly lower charge
battery status will be displayed.
• When inserting the new batteries, make sure that the polarity is correct. This is marked on the
bottom of the battery compartment.
• Close the battery compartment using the screws. Pay attention to the protective seal.
Change the batteries of the electronic meter when:
• the electronic meter displays the "Low Battery" warning,
• the battery symbol indicates an empty battery,
• or when the instrument can no longer be switched on.
• It is recommended to replace the batteries when the charge level is below 50 percent or, in the
case of rechargeable batteries, to charge them.
6.2 Rechargeable Battery Packs (ZFG 3000)
In the ZFG 3000, a 4.8V, 4500mAh battery pack (4x NiMH) supplies the measuring electronics and
the printer with power. Good care of the rechargeable battery ensures that the Light Weight Deflecto-
meter is always ready for use.
The built-in NiMH battery should only be recharged from time to time with the supplied power supply
unit. The charge status can be seen on the charge bar in the display. Depending on the discharge state
of the batteries, the charging process is completed after approx. four hours. After a longer period of
non-use, the battery must always be recharged to avoid having to interrupt measurements on site due
to an empty battery.
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