7
O
O
p
p
e
e
r
r
a
a
t
t
i
i
o
o
n
n
M
M
a
a
n
n
u
u
a
a
l
l
2.5
Cautions in Installation , Storage and Transportion
● Exposure to the direct sunlight or too bright indoor lights may influence on the result of
accurate measurement. Use the appropriate Optometry room.
● Keep the objective glass of the examinee side clean. If it was stained, it may cause on
ERROR or inaccurate measurements.
● In case you leave ERK-9000 without using for certain period, disconnect the power supply
and protect the unit with dust cover.
● In case moving this ERK-9000, fix the stage by using clamping bolt and stage holding knob,
always keep power off, and then lift the bottom of the unit with both hands.
● In case moving this ERK-9000, do not hold forehead.
● In case moving and connect other device this ERK-9000, keep in touch with qualified
technician or service agent and place the equipment plain.
● Get worked, store and move under the following environment conditions for proper operation.
● Operation environment :
- Temperature : +10
℃
~ +40
℃
- Humidity : 30% ~ 90% RH
- Atmospheric pressure range : 700 hPa ~ 1060 hPa
● Storage and Transportion environment :
- Temperature : -40
℃
~ +70
℃
- Humidity : 10% ~ 95% RH
- Atmospheric pressure range : 500 hPa ~ 1060 hPa
