The FLUKE i2000FLEX, a switchable 200/2000A Rogowski current sensor, is a super addition to instruments such as the Fluke 43B. However, there is one annoying characteristic to such peripherals, they use standard batteries! And chomping the battery up in a mere 160 hours of use does not endear one to the thought of their use.
With rechargeable batteries now becoming commonplace, there is a huge move to using them in peripherals such as this (also, rechargeables are 'environmentally friendly' as batteries are not thrown away any more).
But, it still means that the device has to be opened to gain access to the battery to charge it or to replace it with a freshly charged one. This hassle will almost invariably chase a user to fit standard batteries again.
Those adept to soldering can make their lives a lot easier by not only fitting the i2000FLEX with a rechargeable battery, but to also make it rechargeable in situ thus avoiding the complication of opening the unit every time the battery runs flat.
Charging is accomplished with the aid of a standard off-the-shelf charger and a small self-built adapter.
1 off old 9V battery (probably in the i2000FLEX already!)
1 off rechargeable 9V battery
1 off 9V compatible charger
1 off female BNC
Epoxy resin compound
Charging is done by switching the unit off, coupling the output lead to the adapter, and inserting the adapter in to the 9V charger. Follow the instructions on the charger (the typical is to leave the battery to charge for about 14 hours).
Most modern batteries are quite happy to be "overcharged" i.e. should you be in doubt as to the condition of the battery, it is acceptable to recharge the battery for a whole 14 hours before use even if the battery is already fully charged.
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© M.T.P. - 11.11.04