User manual

90TPS1200
Check & Adjust
• To measure targets in two faces. Some of the instrument errors are eliminated
by averaging the angles from both faces.
• Refer to "4.2 Preparation" to find more important points.
)
During the manufacturing process, the instrument errors are carefully determined
and set to zero. As mentioned above, these errors can change and it is highly recom-
mended to redetermine them in the following situations:
• Before the first use
• Before every high precision survey
• After rough or long transportations
• After long working periods
• After long storage periods
• If the temperature difference between current environment and the temperature
at the last calibration is more than 20°C