15
Prepare the instrument for measurement as follows:
• Unpack the instrument by removing the dust protection sleeve from the instrument cuvette
holder.
• Place the battery in the instrument as described in the “BATTERY REPLACEMENT” chapter.
• Place the instrument on a flat table.
• Do not place the instrument under direct sun light.
ST
ARTUP
• Turn the meter on by pressing
ON/OFF
. The display briefly shows all tags on.
To compensate the meter for the sample turbidity or color, the measurement takes place in two
phases. First, the meter is zeroed using the unreacted sample.
After the reagents are added the reacted sample is measured.
• When the beeper sounds briefly and the LCD displays dashes and
“P1”
(Low range),
“P2”
(Medium range) or
“P3”
(High range), the meter is ready. The code that appears on the
secondary display is the one of the last selected range. If necessary, press
RANGE/GLP
to
change range. The blinking
“ZERO”
indicates that the instrument needs to be zeroed first.
• Add 0.5 mL of unreacted sample to the cuvette. Add 0.5 mL of
HI93735IND‑0
indicator
reagent. With the plastic dropper fill the cuvette up to the 10 mL mark adding
HI93735A‑XR
(X=L, M, H) reagent appropriate to the selected range.
MEASUREMENT PROCEDURE
