Twilight Palette Series, Instruction Manual

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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" （ C p.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.
Low range over error/Sampling error
 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"Low Range Over Error"
 The temperature detected is
lower than the measurement
temperature range.
High range over error
 A liquid of high concentration
exceeding the measuring range
is measured.
Temperature measurement range"High Range Over Error"
 The temperature detected is
higher than the measurement
temperature range (approx.
41℃ or above).
Battery error
 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 ℃
… ... nnn
20.4 ℃
…AAA
20.4 ℃
…LLL
20.4 ℃
…HHH
… Lo
20.4
℃
… ... 0.0.0
LLL ℃
12.3
※ 12.3 is an example
of a measured value.
HHH ℃
…12.3
※ 12.3 is an example
of a measured value.
PR-32α
PR-101α
approx. 4℃ or below
PR-201α
PR-301α
approx. 9℃ or below