Hach DR2400, Manual

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General Instrument Operation
General Instrument Operation
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5940018Operation.fm
The Pour-Thru cell can be used with Hach chemistries provided a 25 mL sample
is analyzed. Exceptions are noted in
Table 1 .
The Pour-Thru cell can be used with the following Hach chemistries, but special
care must be taken to rinse the cell with deionized water between samples.
The Pour-Thru cell can also be used to run Nitrogen, Ammonia, Nessler Method
and TKN chemistries. Clean the cell by pouring a few sodium thiosulfate
pentahydrate crystals into the cell. Rinse out the crystals with deionized water.
2.11.1 Cleaning the Pour-Thru Cell
Check the cell occasionally for an accumulation of film on the windows. If the
windows appear dirty or hazy, or if bubbles form in the cell, pour 50 mL of a
detergent solution into the cell. Let it soak for several minutes. Rinse thoroughly
with deionized water. Use a soft cloth to clean the sample cell windows. Paper
towels and other paper products may scratch the windows.
Note: Do not use solvents (e.g. acetone) to clean the Pour-Thru Cell. A dilute acid solution can be
used for cleaning. Rinse thoroughly with deionized water.
2.12 Using the General-Purpose Timer
Table 1 Hach chemistries that cannot be used with the Pour-Thru cell
Aluminum ECR Arsenic Barium Boron, Carmine
Cyanuric Acid Fluoride Formaldehyde Lead, LeadTrak
Mercury Nickel, Heptoxime Nitrite, HR PCB
Phenols Potassium Selenium Silver
Suspended Solids Sulfate TPH Volatile Acids
Zinc Surfactants, Anionic (Detergents)
Table 2 Hach chemistries that need extra rinsing with the Pour-Thru cell
Aluminum, Aluminon Chlorine Dioxide, LR Cobalt, PAN
Copper, Porphyrin Hardness, Calmagite Manganese, LR, PAN
Nickel, PAN Nitrate, MR Nitrate, HR
In addition to pre-programmed timers, many programs have a
general purpose timer available. Touch the timer icon to access the
timer system.