iv
1. PRECAUTIONS FOR SAFE OPERATION ............................................................................ 1
2. PRECAUTIONS ..................................................................................................................... 7
3. LASER SAFETY INFORMATION ........................................................................................ 13
4. PRODUCT OUTLINE ........................................................................................................... 16
4.1 Parts and Functions of the Instrument.......................................................................... 16
Control panel............................................................................................................. 18
Key Operation (When the instrument is locked) ....................................................... 21
Indicators .................................................................................................................. 22
5. USING THE BATTERY ........................................................................................................ 25
5.1 Battery BT-53Q (Rechargeable battery) ....................................................................... 25
Removing the battery................................................................................................ 25
Battery charging........................................................................................................ 26
5.2 Battery Holder DB-53 (Dry battery holder) *Optional accessory................................... 29
Removing the battery................................................................................................ 29
Replacing the dry cell batteries................................................................................. 29
5.3 PC-17 (Power cable for 12vDC) *Optional accessory .................................................. 30
6. BASIC OPERATION ............................................................................................................ 31
6.1 Setting up the Instrument.............................................................................................. 31
6.2 Grade setting procedure ............................................................................................... 32
Direct entry of grade value........................................................................................ 32
Set grade value by moving laser............................................................................... 35
CONTENTS