Cleaning The Flow Meters; Storing The Flow Meters; Cleaning The Connectors; Maintaining The Electronics Compartment - Hach 911 User Manual

Intrinsically safe flow meters

Table of Contents

Maintenance

7.3 Cleaning the Flow Meters

Clean the outside of the logger case with warm water and mild detergent. Do not use

solvents or harsh cleaners to clean the logger. Do not use high pressure washing

equipment to clean the case.

Remove all batteries from the logger when storing for long periods (more than 3 months).

Store the sensors in a dry area. Make sure that all desiccant materials in the probes are

kept fresh (blue) at all times.

Coat connectors with lithium or di-electric grease to prevent corrosion.

All internal fuses are self-resetting and require no maintenance. There are no other

user-serviceable components inside the electronics compartment.

An internal battery is provided to power RAM memory as well as the real time clock and

associated circuitry. The memory battery keeps the programmed settings as well as the

logged data whenever the main power fails or is removed during transport, storage, or

replacement. The internal memory battery is located in the electronic compartment and is

not user replaceable.

The internal memory battery has a life expectancy in excess of five years with the main

battery installed. If the main battery is removed for an extended period of time, the life of

the internal memory

battery will be substantially shorter. The user can see a low memory battery indicator

using the appropriate application software. See the software manual for details.

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