Clean The Meter; Apply Silicone Oil To A Sample Cell; Store The Sample Cells; Replace The Battery - Hach 2100A User Manual

Clean the meter

The meter is designed to be maintenance-free and does not require
regular cleaning for normal operation. Exterior surfaces of the meter may
be cleaned as necessary.
Note: Do not clean the meter with solvents to avoid damaging the material.
1. Clean the meter with a dust- and lint-free dry or slightly damp cloth. A
mild soap solution can also be used for liposoluble contamination.

Apply silicone oil to a sample cell

Sample cells and caps must be extremely clean and free from significant
scratches. Apply a thin coating of silicone oil on the outside of the sample
cells to mask minor imperfections and scratches that may contribute to
light scattering.
Note: Use only the provided silicone oil. This silicone oil has the same refractive
index as the sample cell glass.
1. Clean the inside and 2. Apply a small bead of
outside of the cells and silicone oil from the top
caps by washing with a to the bottom of the cell.
laboratory glass
cleaning detergent.
Follow with multiple
rinses with distilled or
demineralized water.

Store the sample cells

Do not air dry the sample cells.
Note: Always store the sample cells with caps on to prevent the cells from drying.
1. Fill the sample cells with distilled or demineralized water.
2. Cap and store the sample cells.
3. Wipe the outside of the sample cells dry with the a soft cloth.

Replace the battery

Potential fire hazard. Use only alkaline or nickel metal hydride batteries (NiMH) in
the meter. Other battery types or incorrect installation can cause a fire. Never mix
battery types in the meter.
For battery replacement refer to
1. Remove the battery cover.
2. Remove the batteries.
3. Install 4 AA alkaline or 4 AA nickel metal hydride (NiMH) batteries.
4. Replace the battery cover.
3. Use the provided
Replace the lamp
oiling cloth to spread the
oil uniformly. Wipe off
the excess so that only a
thin coat of oil is left.
Burn Hazard. Wait until lamp cools down. Contact with the hot lamp can cause
Make sure that the
burns.
sample cell is almost dry
with little or no visible oil.
Note: Store the oiling
cloth in a plastic storage
bag to keep the cloth
clean.
N O T I C E
W A R N I N G
Figure 3
Make sure that the batteries are installed in the correct orientation.
C A U T I O N
on page 7.
English 11