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©2011 Johnson Level & Tool
Rechargeable Batteries
• Connect the charger to the AC outlet. Remove the battery box from
the instrument and insert plug of charger into the recharge socket
of battery box. A red indicator light on the charger means the
instrument is recharging. A green light means the instrument is
fully recharged.
• The plug should be pulled out from the rechargeable battery box
after the unit is recharged, the charger is equipped with an over-
charge protective circuit.
• Rechargeable batteries can be used repeatedly for 300-500 times.
Complete discharge of the battery will shorten the battery’s life.
• Recharge batteries at least once per month to keep its longest life.
Measurement of Angle
Observing in the “Normal” and “Reverse” positions of the telescope.
The normal, or direct, position of the telescope refers to observation
with the vertical circle opposite the battery door being on the left.
The reverse position refers to observation with the vertical circle
being on the right. The mechanical errors can be offset by averaging
the values measured in the normal and reverse positions.
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