Sony LT20 Series Instruction Manual page 88

Erroneous counting.
Accuracy cannot be
obtained
Cleaning
L L L L L
To clean the display and casing
RESET
A
RESET
B
80
• Check that the grownding is made correctly.
• Is there a large amount of noise?
• Check the power voltage is in the specified range.
• Check to see if the unit occasionally miscounts.
• Check for any mechanical trouble that may affect accuracy.
(Any trouble due to machine adjustment, deflection on play.)
• Check to see if the temperature difference between the measuring unit, machine and
workpiece is great.
LT20
P M A X M I N P ― P C P H1 2 3 4
A+B
Use dry cotton cloth.
mm
P M A X M I N P ― P C P L1 2 3 4
BA
mm
P
MODE COMP
SET
To remove heavy dirt
Use diluted neutral
detergent.
Do not use.