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STP-200/300/400 Series Instruction Manual

9 Internal Battery

Two batteries (PORTALAC Series Small-Sized Sealed Lead-Acid Batteries,

PE12V 7F1 : 12 V, 7 Ah, manufactured by Japan Storage Battery Co., Ltd.)

(hereinafter referred to as the internal battery) are inserted into the STP pump

for backup during a power failure. These are rechargeable. During a power

failure, power is supplied from the batteries, and levitation by a magnetic

bearing continues for 15 minutes while the pump is decelerating and the rotor is

landing.

Fully-charged batteries are capable of consecutively backing up the operation of

the STP pump twice.

9.1 Life of the Internal Battery

The life of the internal battery is affected by ambient temperatures.

Pay attention to ambient temperatures (The operating ambient temperatures

range from 0 to 40 °C).

Figure 9.1 shows the relationship between the ambient temperatures and the

battery life.

◇ Replace the battery approx. once a year to make sure it is always

ready to back up the operation of the STP pump.

For instructions on how to replace the battery, see Section 9.4, "How

to Replace the Internal Battery."

9.2 Allowable Shelf Life of the Internal Battery

When the internal battery is left uncharged, its capacity will be reduced by

self-discharge. The allowable shell life of the internal battery is affected by

ambient temperatures. Pay attention to its storage temperatures (The storage

temperatures range from - 20 to + 40 °C).

Figure 9.2 shows the relationship between storage temperatures and the

allowable shelf life of the internal battery.

◇ When the STP pump is left unused over the specified period, charge

the internal battery for 3 hours or more, or replace it with a new one

before starting the STP pump. For instructions on how to recharge

the internal battery, see Section 9.3, "How to Charge the Internal

Battery." For instructions on how to replace the internal battery,

See Section 9.4, "How to Replace the Internal Battery."

9-1

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Sharp R-880D Manual de Instruções Página 88