Topcon GTS-821A, GTS-822A, GTS-823A, GTS-825A instruction manual Precautions

17 PRECAUTIONS

17PRECAUTIONS

1)For transportation, hold by the handle or yoke of the instrument. Never hold by the lens barrel as it can affect the fixing bracket inside and reduce the accuracy of the instrument.

2)Never expose the instrument without a filter to direct sunlight. It may damage the components inside the instrument.

3)Never leave the instrument unprotected in high temperature. The temperature inside instrument may easily reach up to 70°C or above and will reduce the service life.

4)When a high degree of precision is required for measurement, provide shade against direct sunlight for the instrument and tripod.

5)Any sudden change of temperature to the instrument or prism may result in a reduction of measuring distance range, i.e. when taking the instrument out from a heated vehicle.

6)When opening the carrying case and taking out the instrument, place the case horizontally, then open the case.

7)When returning the instrument to its case, be sure to match the white positioning marks provided with the case and place the instrument with the eyepiece upward.

8)For transportation, provide dampening or a cushion appropriately to avoid sudden shock or vibration.

9)For cleaning the instrument after use, remove dust using a cleaning brush, then wipe off with a cloth.

10)For cleaning the lens surface, use a cleaning brush to remove the dust, then use a clean lintless cotton cloth. Moisten it with alcohol (or mixture with ether) to wipe gently in a rotational motion from the center out.

11)Even if any abnormality occurs, never attempt to disassemble or lubricate the instrument yourself. Always consult with TOPCON or your dealer.

12)To remove the dust on the case, never use thinner or benzine. Use a clean cloth moistened with neutral detergent.

13)Check each part of the tripod after extended use. Parts (screws or clamps) may work themselves free.

17-1