CR:270 Series User Manual
Page 15
Replacing the batteries
Power to the CR:270 series is supplied by two 9V batteries. The specification of these
batteries is IEC 6F22 or NEDA 1604. This is commonly known as PP3 in the UK.
To replace the batteries, slide the black battery cover from the instrument. The battery
cover is located at the bottom of the instrument.
Remove the batteries from the instrument, taking care not to pull the battery leads.
The batteries are connected to clips which are designed to prevent the batteries from
being connected with the wrong polarity.
Types of batteries
The CR:270 series should be used with high quality batteries. These should be either Alkaline or
Zinc Chloride type. Alkaline batteries will give a longer life than the lower cost Zinc Chloride
batteries.
Rechargeable Ni-Cad batteries are not recommended for use in the CR:270 series because of the
rapid fall off in the output from this type. However, if the user decides to use Ni-Cad batteries,
these should be removed from the instrument before charging.
