METER AQUALAB TDL - Verification and Calibration; Water Activity Verification

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6 CLEANING AND MAINTENANCE AquaLab TDL

Purpose

The purpose for the cleaning procedure is to remove grease, dirt

and other soluble substances which can absorb or release water dur-

ing veriﬁcation, calibration, and/or sample testing. For the TDL

and the IR sensor to perform well, they must be clean and free from

contaminants (e.g. ﬁngerprints).

When to Clean

The instrument should be cleaned if visual inspection indicates the

chamber is dirty or as instructed in Table 1 on page 35.

Cleaning Supplies

Your new instrument comes with the AquaLab Cleaning Kit. The

AquaLab Cleaning Kit comes with all the materials needed to clean

the instrument for about a year. Every time you send in your instru-

ment for the annual calibration service, you receive a new cleaning

kit. The AquaLab Cleaning Kit contains the following supplies.

• Spatula (a thin plastic rod)

• Deionized Water

• Cleaning Solution

• Kimwipes

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Note: Wash your hands with soap and water and use clean lab gloves

before starting the cleaning procedure. This prevents oils from con-

taminating the cleaning materials, the sample chamber, or the sen-

sors.

Note: You can substitute isopropyl alcohol for cleaning solution.

6.1 Cleaning the Block Sensors

Accessing the Sample Chamber

Turn the power oﬀ on your AquaLab. If latched, move the lever

over to the open position. Lift the chamber cover to expose the sam-

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