Seaward ARE 1557 - Manual (Page 29)

ERT1557
Operating Instructions
- 29 -
10.3 Battery Replacement
Before opening the ERT1557 ensure that it is
disconnected from all voltages! Electric shock
danger!
10.3.1 Power the unit off by selecting the Off position
on the rotary switch.
10.3.2 Disconnect all the test leads from the unit
10.3.3 Position the ERT 1557 face down and release
the captive screw in the battery compartment
cover.
10.3.4 Remove the battery compartment cover.
10.3.5 Remove the discharged batteries from the
compartment.
10.3.6 Fit a new set of alkaline batteries.
10.3.7 Relocate the battery cover over the battery
compartment and fasten in position with the
battery cover captive screw.
10.4 Service and Calibration.
To maintain the specified accuracy of the
measurement results, the instrument must be
recalibrated at regular intervals by either the
manufacturer or an authorised Seaward Service Agent.
We recommend a recalibration period of one year.