Hanna Instruments HI 84529 - Manual (Page 35)

www. hannainst .com 35 Operational Guide
For best accuracy, before taking any measurement, ensure that the pump is
calibrated on the selected range following the “Pump Calibration Procedure”.
Note: Verify that the instrument has been calibrated (pH and pump) before
performing any titrations.
Refer to “Setup Menu” to set up the instrument for your measurement. Select
the corresponding measurement range.
By Mass:
Place a clean 100 mL plastic beaker on an
analytical balance. Zero the balance.
Add 20 ± 1 g (Low 20, High 20) or 50 ± 1 g
(Low 50) to the beaker.
Record the reading once it has stabilized.
Remove the beaker from the balance.
By Volume:
Volumetrically add 20 mL( Low 20, High
20) or 50 mL (Low 50) to a clean 100mL
plastic beaker.
Note: Failure to use a clean pipette will
result in erroneous readings.
Note: DO NOT PLACE THE TIP INTO THE
SAMPLE BEAKER. PLACE THE TIP OVER
A WASTE BEAKER. A SMALL AMOUNT OF
TITRANT IS DISPENSED WHEN THE PUMP
RESETS.
Press START to begin a titration.
For samples by mass the “Edit Sample
Mass” screen will be displayed. Use the
ARROW keys to enter the exact sample
mass then press ACCEPT.
Titration
Procedure
Unit Low Range 20 and 50 High Range 50
%l.a 0.01 to 0.20 0.1 to 2.0
°SH 0.4 to 8.9 4.4 to 88.9
°D 1.0 to 20.0 10 to 200
°TH 1.1 to 22.2 11.1 to 222.2