Hach-Lange Sipper Module for DR 5000 - Manual (Page 11)

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Sipper module
8. When the sample purge is complete the instrument is ready for the next sample.
Note: After starting the Reading sequence the ZERO/READ keys turn into a MARK/STOP key.
Press STOP at any time to start over.
Cleaning the Sipper Module
Sample Cell
Purge the cell with deionized water before and after each test session. If the cell is
unusually dirty, repeat the sip and purge cycles several times with deionized water, or
temporarily set the purge cycle to a higher setting before adjusting the timing parameters.
Occasionally inspect the sample cell windows. If the windows appear dirty or hazy,
remove the sample cell and soak it in a soap solution or dilute acid and rinse thoroughly
with deionized water.
Module
If the module becomes dirty, wipe it clean with soap, water, and a soft cloth. DO NOT
immerse the module or use solvents (e.g. acetone) to clean the module.
Cleaning the Tubes
The tubes should always be cleaned with deionized or distilled water after a measurement
series has been completed.
The discharge tube in the pump zone and the sipper tube are subject to mechanical and
chemical stresses and must be replaced. The number of operating hours for the tube sets
depends on the type of pumped solutions.