User Guide

12
POWER CONNECTION
Plug the 12VDC adapter (HI 710005 - 110VDC, or HI 710006 -
220VDC) into the DC socket. Plug the adapter into the outlet.
Alternatively, remove the battery cover on the back of the meter;
attach 2 fresh 9V batteries and replace the cover.
Note:Insure the main line is surge protected.
Note: Always turn the meter off before unplugging it to insure no data
is lost.
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
• The meter will first perform an LCD self
diagnostic test by displaying a full set of
figures.
• Then it will show a scrolling
"225 Hanna Inst" message.
OPERATIONAL GUIDE
• When the LCD displays “----”, the meter
is ready. On the secondary LCD "P1" will
appear to inform that the first parameter
measurement procedure (Ammonia LR)
can be performed.
• Press the PROGRAM M and PROGRAM L keys to select the
desired parameter.
49
SPECIFICATIONS
Range 20 to 200 mg/L
Resolution 5 mg/L
Accuracy ±30 mg/L ±7% of reading
Light Source Tungsten lamp with narrow band interference
filter @ 610 nm
Method Adaptation of the Turbidimetric Tetraphenylborate
method. The reaction between Potassium and
reagents causes turbidity in the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93750
AA
AA
A-0 Potassium Reagent 6 drops
HI 93750
BB
BB
B-0 Powder Reagent 1 packet
REAGENT SETS
HI 93750-01 Reagents for 100 tests
HI 93750-03 Reagents for 300 tests
For other accessories see page 56.
MEASUREMENT PROCEDURE
Note: for sample preparation follow the NUTRIENTS SOLUTION (HR)
procedure at page 21.
• Select the program number 12 “Potassium HR” on the secondary
LCD by pressing PROGRAM M and L.
• Fill the cuvet with 10 mL of sample, up to the
mark.
• Add six drops of HI 93750A,
replace the cap and swirl the
solution.
• Place the cuvet into the holder and
ensure that the notch on the cap is
positioned securely into the groove.
• Press ZERO adn “SIP”
will appear on the dis-
play.
10 mL
Potassium HR
POTASSIUM HIGH RANGE
x 6