
(cAUTtONl
o Perform.Zero Setting each day prior to using the instrument.
: 1]9.e d$]i!!e-d or tap water that is approximat6ly the same temperature of the sample to be measured.
o lf the ELl. function displays the [nnnn] warnin-q messaqe whiie oerformino zero-settino- sharte rha nr
o lf the ELl. function displays the fnnnn]warning message whiie performing zero-setting, snaOe itie prism
head with your hand and press the ZERO key again.
. lf the LCD screen displays [AAAA], dip the piism head in water
the prism is not exposed to air. again and press the ZERO key, ensuring
(1) Wipe the prism and the prism head clean.
(2) Prepare distilled or tap water in a clean container.
(S) fgJly-rybmerge the prism head into the water and press the
START key OR press the START key and (within 10
qegg$s) fully submerge the prism head into the water (Fig.
a-11 (Fig. a-2).
(a) [cHHH] will be displayed (Fig.4-3).
Hold down the ZERO key for more than 1 second while the
pfism head is submerged in water. [0000] will flash twice
(Fig. aa) and then [cHHH] (Fig. a-3) wiil be disptayed, Zero
setting is complete.
Wipe.the prism and the prism head clean with tissue paper,
and then proceed to measuring a sample.
W,-W
ffiHHl Fio-4-4
-/,#\
tnnnnt
IUUUUI
L+
ELI Function
(The instrument is equipped with the External Light lnterference (ELI)
lunctron to ensure accurate readings> ,[ln n n
lf the instrument is subjecled to intense light, such as direct sunlight or artificial lighting, I g
when measuring a sample or zero sefting, the ELI function will diiplay the lcnnnllfiglA; warning message
immediately after the START or !!Bo key is pressed. When this happens, srraite ttie frism rrdo witn yiur
hand and press the START or ZERO key again. lf the waming
message continues to be displayed, try the following methods:
(DPlacg the sample in a non-translucent cup to measure.
@ Using a shallow container, keep the prism close to the bottom
of the container while taking measurements.
*External Light lnterference (ELl)
,WE
' lf the ELl. function displays the [nnnn] warning message while measuring a sample,
head with your hand and press ine SfRRf ke-y again.
Two different ways to measure a sample:
1 . Dip the prism head into a sample-filled container (Fig. 5-1).
2. For small sample volumes, touch the prism head into t[e
sample (Fig.5-2).
(1) Dip the prism head into the sample and press the START
key OR press the START key and (within .10 seconds)
touch the prism head into the sample.
(2) The measurement value will be displayed in approximately
2 seconds (Fig. 5-3). Thereafter, the display will update
every second showing the measurement value as the
instrument takes continuous measurements.
(3) The unit will turn itself off after 3 minutes of continuous measurement. The results displayed wlll start
blinking approximately 10 seconds before the screen is turned off. lf a longer measurement time is
desired, hold down the srART key for 1 second to resume continuous meisurement.
ffi-IpPJAIT_k"y tg. pause measurement. The last measured value will be displayed (Fig. 5-4). The unit wi1
automatieally turn off after 2 minutes in this paused state. Press the START key again to resime measurement.
is.!-3
ffitril
shade the prism
Fis'5-2&
&
Fig.5-4
t-TEjl
The following messages alert the user when an operation has failed.
@External Light lnterference (ELl) : The follo.wing warning.message will be displayed when intense light
passes through the prism.
[c] will blink on and off for the first 10 seconds it is displayed
(Fig.6-1 ). While [c] is blinking, shade the prism head with your
hand to commence with the measurement.
lf.the prism head is not shaded within 10 seconds, [c] will stop
blinking and the START key will need to be pressecl 6gain (Fig.
6-2).
Fig.6-.t. . Fig.6_2
f,t*nnl * ffi;
@Air Measurement Error :
Fig.6-3
F--l +
@Temperature Enor : The. following error message will be displayed when the temperature of the prism
; and the temperature of the sample vary gieatly.
i
The following error will be displayed when the prism is exposed to air during a
measurement.
Fis.6-4 When the STABT kefrs pressertrfcffil blink (Fig.6-g.
lf the prismhead is not adequately submerged within i 0
I t ! I I I se.conds, [c] will stop blinkin! andihe error-message [LLLL]
IL L L L I willbedisplayed(Fig.6-4). -
The START key will heed to be pressed again after
adequately submerging the prism head. -
Fis.6-6 [c] will blink on and off for the first 30 seconds it is displayed
(Fig.6-5). Keep the prism head submerged in the sarirpll, and
I L L L L I measurement will commence as soon as the difference in
IL L L l- I temperatureisnarrowed.
lI the temperature diflerence remains too wide after 30
seconds, [c] will stop blinking (Fig.66). Keep the prism head
submerged in the sample and press the START key again.
' Fio.6-5
, '6ttt_i '