The BCM Checker was specially designed to verify the accuracy of the
electronics inside the Bathycorrometer and is suitable for both
Buckleys and Roxby units. It is quick and easy to use and provides a
benchmark for recalibration without needing to break the water seal.
The BCM checker consists of a precision voltage reference giving an
output of 1.990 volts. The unit should be plugged into the socket in the
Bathycorrometers handle whilst the other lead is connected to the
With the BCM checker switched off, the Bathycorrometer should
read 0.000 and, with the BCM checker switched on, the
Bathycorrometer should read 1.990.
The BCM checker is powered by a 9 volt battery (supplied) and is
designed to shut off its output when the battery voltage is low. One LED
shows when the unit is switched on and a second indicates when the
battery requires replacing.