Hach 54400-18, Инструкция по эксплуатации инструмента, Страница: 35 / 74

Section 2
Page 33
54400_start.fm
Installing the Reagents
2.3 Installing the Reagents
The analyzer requires two reagents, a buffer solution and an indicator. Space
is provided in the instrument enclosure for a 500-mL bottle of each of the
reagents. Two reagents used in the chlorine analysis are installed in the
analyzer hydraulic section and replenished at monthly intervals. One is the
buffer solution, Free Chlorine Buffer, Cat. No. 23141-00, used to determine
free available chlorine, or Total Chlorine Buffer, Cat. No. 22635-00, used for
total chlorine analysis. The buffer solutions are completely formulated at the
factory and are ready to install. Remove the cap and seal from the buffer
solution bottle and install the cap and tubing labeled
BUFFER to the buffer
solution bottle.
Note: It is normal for the
reagent tubing to become
discolored over time.
The second reagent, the indicator solution, must be prepared.
The indicator solution and indicator powder must be mixed just before use to
ensure the best instrument performance. Using the powder funnel provided in
the maintenance kit, add the contents of one bottle of DPD High Range
Powder, Cat. No. 22972-55, to a bottle of Total Chlorine Indicator Solution,
Cat. No. 22634-00, or a bottle of Free Chlorine Indicator Solution,
Cat. No. 23140-00. Stir or shake until the powder is dissolved completely.
Remove the cap from the reagent bottle and install the cap and tubing
labeled INDICATOR to the reagent bottle. Tubing should be inserted to the
bottoms of the bottles to prevent air from being drawn in when the level in the
bottle drops.
Remove each reagent bottle cap and replace it with the special two-part bottle
cap that is connected to the delivery tube inside the instrument.
Test Type Required Reagent Cat. No. Reagent Set Cat. No.
Free Chlorine
Free Chlorine Buffer Solution 23141-11
25569-00 Free Chlorine Indicator Solution 23140-11
DPD Indicator Powder 22972-55
Total Chlorine
Total Chlorine Buffer Solution 22635-11
25570-00 Total Chlorine Indicator Solution 22634-11
DPD Indicator Powder 22972-55