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pH / mV Output Selector
Used to select one of a range of pH and Millivolt values. The Function
switch must be set to ON or Impedance for the pH/mV output to be
active. See sections 2 and 3.
Conductivity / TDS Output Selector
Used to select one of a range of Conductivity and TDS values. The
values are simulated by a precision resistor network, so the Function
switch can be left in the OFF position for these tests. See section 4.
Function Switch
Used to select ON / OFF, Impedance (section 7) or Battery Test
(section 8).
pH / mV Output Connector
All pH and Millivolt signals are output through this connector.
Conductivity / TDS / Temperature Output Connector
All Conductivity, TDS and Temperature signals are output through
this connector.