horiba U-51, Инструкция по эксплуатации

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3 Basic Operation
9
Note

Data and settings will not be lost when the batteries are replaced.

If dirty or twisted, the battery gasket will fail to keep the batteries dry. Check its condition before
closing the cover.

To ensure long service life, replacing the battery gasket periodically (once a year) is
recommended.
Precautions when using dry cell batteries

Batteries to use: LR14 alkaline dry cell batteries (C-size dry cell batteries) or rechargeable nickel-
metal hydride dry cell batteries (C-size)
Do not use manganese batteries.

Dry cell batteries used incorrectly may leak or burst. Always observe the following
- Orient the batteries correctly (positive and negative ends in correct positions).
- Do not combine new and used batteries, or batteries of different types.
- Remove the batteries when not using the system for a prolonged period.
- If batteries leak, have the system inspected at your nearest sales outlet.

Battery life

The battery life for continuous operation when using C-size alkaline dry cell batteries is
about 70 hours.

Using the backlight consumes a proportionate amount of battery power, shortening
battery life.

Searching position information using the GPS unit consumes a proportionate amount of
battery power, shortening battery life.

Nickel-metal hydride secondary batteries can be used, but the battery life is not
guaranteed since it will vary according to usage (number of times data is saved, number
of charges and amount of each charge). In general, secondary batteries have one-half to
one-third the life of C-size alkaline batteries.

The 70-hour battery life figure applies to a control unit operating temperature of 20

C or
more. The battery characteristics shorten the battery life at operating temperatures lower
than 20

C, so check the remaining battery level, and replace the batteries before it
reaches Level 1.

The batteries packed with the system at the time of shipment are for checking operation.
Their life is not guaranteed.

The 70-hour battery life figure is the amount of operating time the batteries can provide
until the system stops operating. The system may fail during operation if the remaining
battery level is low, so it is a good idea to check the remaining battery level and replace
the batteries with new ones well before the batteries run out completely.
U-51/52/54
Battery life: 70 hours (backlight off)
U-53
Battery life: 500 measurements (backlight off)

Since U-53 is designed for turbidity measurement with wiper, its battery life is estimated in
terms of the number of turbidity measurement sequences performed.

Battery power is also consumed by measurement operations other than turbidity mea-
surement.

The battery life when turbidity measurement is not performed is about 70 hours.