The current being drawn by the amplifiers may be monitored using a Volt meter.  The current being drawn is transformed into a voltage that may be measured on TP2, TP4, TP6, for amplifiers A,B,C respectively.

Monitoring Amplifier A current with a volt meter:

With a volt meter set up between TP2 (CURRENT MONITOR VOLTAGE))  and GND (REF pin), measure the voltage being displayed with amplifier A drawing current.  Set the volt meter to measure VOLTS.   This allows a measurement of the current in terms of a voltage.   As an example, a measurement of  0.230 dcV may be interpreted as Amplifier A drawing 230 mA or (0.230 Amps).

Monitoring Amplifier B current with a volt meter:

With a volt meter set up between TP4 (CURRENT MONITOR VOLTAGE))  and GND (REF pin), measure the voltage being displayed with amplifier B drawing current.  Set the volt meter to measure VOLTS.   This allows a measurement of the current in terms of a voltage.   As an example, a measurement of  0.230 dcV may be interpreted as Amplifier B drawing 190 mA or (0.190 Amps). 

Monitoring Amplifier C current  with a volt meter:

With a volt meter set up between TP6 (CURRENT MONITOR VOLTAGE))  and GND (REF pin), measure the voltage being displayed with amplifier C drawing current.  Set the volt meter to measure VOLTS.   This allows a measurement of the current in terms of a voltage.   As an example, a measurement of  0.230 dcV may be interpreted as Amplifier C drawing 270 mA or (0.270 Amps).