Instruction Manual

7
C. When diluting samples, be sure to use a pure
solution such as distilled water.
D. Sample contains suspended solids. Filter and
thoroughly mix the sample before testing.
E. Perform a calibration and check the zero point.
F. Replace the battery.
G. Outside light can cause erratic readings, make sure
to close the COVER to the PRISM during
measurement.
7. BATTERY REPLACEMENT
A. When the battery is low, the above symbol
appears on the LCD.
B. Open the back cover to replace the 9V battery.
C. Reinsert the back cover, making sure it is properly
seated. A built-in gasket protects the circuitry from
spills.
8. PRECAUTIONS
A. Turn off the unit before connecting the AC power
adapter.
B. Protect the LCD from exposure to strong light
sources.
C. Avoid prolonged use or storage in extreme
temperatures.
D. Clean the prism and window surfaces before and
after use with a soft wet clean cloth or paper towel.
Other surfaces may be cleaned with a mild liquid
dish detergent and water.
E. Do not use in corrosive environments.
F. Do not submerge the unit.
G. This precision measuring instrument contains
delicate optics and electronics. Handle with care
and do not drop.
H. To avoid electric shock, make sure the battery
compartment is covered and do not disassemble
the unit.