DIFF automatic volume flow meter
User manual
V11.2 - EN
Page
13
TDC 16-7-2012
OBSERVATOR
instruments
5. Batteries
5.1 First use of the batteries
Fully charge the batteries the first time in standard charging mode. The batteries will only reach
full capacity after charging them fully a couple times. The batteries are fully charged when the
green indication LEDs are continuously lit. Use fast charge will reduce the battery life, we advise
to use the standard charge mode whenever possible. For more detailed information we refer to
the charger manual.
5.2 Compatible batteries
The DIFF is designed for the usage of SANYO rechargeable NiMH batteries with a minimum
capacity of 2700mAh. Beware: Different suppliers have different specifications. The included
SANYO batteries are tested by Observator for the usage with the DIFF. We recommend to use
these batteries only!
Nonchargeable batteries, like the alkaline type, are not suitable for the DIFF. Same counts for
rechargeable batteries with less capacity. If you do use these types of batteries, keep in mind that
the range most likely will be limited to 100 - 300 m3 / h. It is also possible that the DIFF will power
itself down due of voltage drop. Nonchargeable batteries have much lower capacity then the
included batteries.
5.3 Battery life
With the DIFF fully charged you will be able to measure 1 working day (typical 8 hours of usage
when the average measuring is 75 m3/h). The actual operation time will depend on the measured
flow. When the maximum measured flow is 100 m3/h or lower, you will be able to measure upto 2
or 3 days before the batteries need to be replaced.
Tips for optimal use of the batteries:
Cold batteries can deliver less energy. Store the batteries preferably in a room with an ambient
temperature above 5
°C.
Take care that the batteries have the same temperature as the DIFF, this
will avoid moisture.
5.4 Lifetime
The expected lifetime of the included NiMH batteries is about 1 year when using them daily. It is
safe to assume that the batteries need replacement when they need to be charged more
frequently then before. We recommend replacing the batteries every year or when they are
charged / discharged 250 times.
Fast charging cycles will decrease the life of batteries.
Waste batteries must be disposed in accordance with the currently applicable local laws.
5.5 Warnings
Read the manual of the battery charger before using. Never try to charge nonchargeable
batteries. Only use the (included) SANYO NiMH (model HR-3U 1.2V) batteries with a minimum
capacity of 2700 mAh.
Only charge the batteries in an ambient temperature of 0…50
°C
in the standard battery charger.
The fast battery charger can only be used in an ambient temperature of 10….40
°C.
Also refer to
the manual of the battery charger.
It’s not possible to use a fixed power supply, usuage of a fixed power supply can cause
EMC problems, will void your warranty and CE approval.
Faults and damage caused by other type of batteries then specified, is excluded from
the Observator warranty. Batteries are excluded from the standard warranty terms.
