Connections in Detail
2-21
JP3. In the Mk10A if TB9 is fitted the battery can be fitted end in. The battery cable
should be routed away from the communication lines, since it is at neutral potential.
Replacement batteries may be ordered from EDMI separately. A low battery indicator
is displayed on the LCD if the battery is not present or is depleted – the level this occurs
at can be configured. The battery usage life is longer than 10 years on continuous
backup with either of the 700mAh batteries at 25°C. In normal operation the battery
should last for more than 10 years.
To eliminate the possibility of data loss it is best to change the battery while the meter is
running. Care must be taken as the battery is at the potential of the neutral terminal.
The battery is at the potential of the neutral terminal. If conditions (such as wiring
configuration) make this a dangerous operation then steps should be taken to ensure that
it is safe to do so. While the risk of coming into contact with the conductors during a
battery change is minimal, care must be exercised.
UPS Battery
This battery is fitted to the UPS variant to supply the meter and modem in case of power
outage. It is separate to the normal battery used to run the clock during loss of power
and which allows the LCD to be woken up.
The UPS battery is a rechargeable 500mAh Ni-MH battery. It is a custom battery,
replacements are available from EDMI. It connects to PL11, a small connector towards
the right of the meter.
In operation the meter switches over to the UPS battery when power is lost, to allow the
meter to contact a server via GPRS and communicate the event. The meter turns off the
UPS supply 2 minutes after the supply was lost.
The meter also measures the UPS battery voltage and will signal a battery alarm if the
battery voltage is too low of too high, or no battery is fitted. It may take 24 hrs for the
battery to reach the 5.4V needed for proper operation, and the meter will not switch to
UPS if it is too low.
The battery is at the potential of the neutral terminal. If conditions (such as wiring
configuration) make this a dangerous operation then steps should be taken to ensure that
it is safe to do so.
The Mk10 Meter 2-21
Содержание Atlas Mk10
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