16
9.
Powering off
The instrument will turn itself off after approximately 2 minutes of
inactivity. To manually turn it off, hold down the START/OFF
Button for more than 2 seconds.
10.
Error messages
* Please refer to "13-7.Error message" （Cp.22）for the user scale functional-related error
message display.
The instrument alarms erroneous or incomplete operation by error messages.
The followings are kinds of error messages.
Zero setting (Standardization) error
Water (standard liquid) is not
dripped on the prism surface
and zero setting
(standardizasion) is made in a
state of the prism surface
being exposed to the air.
Zero setting
(PR-32α,PR-101α,
PR-201α) is made with a
sample.
Standardization (PR-301α) is
made with a sample or water.
".." Standardization temperature error
The prism of the PR-301α is
below approx. 18℃, or is above
approx. 25℃ during
standardization.
A liquid of low concentration
exceeding the measuring range
is measured.
No sample exists on the prism
surface or measurement is
made in an incomplete
condition.
Temperature measurement range
The temperature detected is
lower than the measurement
temperature range.
A liquid of high concentration
exceeding the measuring range
is measured.
Temperature measurement range
The temperature detected is
higher than the measurement
temperature range (approx.
41℃ or above).
The battery is low.
→ Replace the battery with
new one.
※ Immediately before the
battery is used up, the
instrument may, perform
erroneous operation,
without displaying the error
message "Lo". In such a
case, replace the battery
with new one.
External light interference
Too much light is entering the
prism, and the instrument
cannot measure accurately.
→ Shade the sample stage
with your hand and take a
measurement again.
When the battery is low, "nnn"
may be displayed.
20.4℃
20.4℃
20.4℃
20.4℃
… Lo
20.4℃
LLL℃
※
of a measured value.
HHH℃
※ 1
of a measured value.
PR-32α
PR-101α
approx. 4℃ or below
PR-201α
PR-301α
approx. 9℃ or below
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