Enable Amplifiers; Measure Voltage; Power Down; Reconnect - AE Techron 7224 Setup Instructions

PARALLEL AMPLIFIER SYSTEM SET-UP INSTRUCTIONS
Temporarily remove the output cable from the OUTPUT terminal of each amplifier. Leave the SAMPLED
COMMON cable connected to both amplifiers.

5. Enable Amplifiers

Enable both amplifiers. Inject a DC voltage into the input of the Master amplifier that results in an output of
approximately 80 volts DC.

6. Measure Voltage

Using a digital multimeter, measure the voltage between
the OUTPUT terminals of the Master and Slave amplifiers.
The measured voltage should be near zero volts; this
would indicate that both amplifiers are producing the
same output. To adjust this voltage, or null it out, adjust
the Slave Gain Trim on the Slave amplifier (see Figure
2.5). Adjust the Slave Gain Trim until the voltage is as
close to zero as possible; however, a difference voltage of
50 mV or less is acceptable.

7. Power Down

Remove the input signal from the Master amplifier and
disable both amplifiers.

8. Reconnect

Figure 2.5 – Slave Gain Trim
Reconnect the load OUTPUT cables to both amplifiers.

9. Measure Current

Enable both amplifiers and inject an AC or DC signal
into the input of the Master amplifier that results in an
output of approximately 10 amps of current from each
amplifier. The output current can be measured using a
current clamp meter or using the IMON (TL4) current
monitor of each amplifier (see Figure 2.6). If using a
current clamp meter, attach the clamp meter between
the amplifier OUTPUT terminal and the ballast resistor.
The current from each amplifier should be equal; if not,
readjust the Slave Gain Trim on the main board of the
Slave amplifier until the two currents are equal.
Figure 2.6 – IMON Current Monitor
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8-11 Information subject to change