Chapter 6. Operation; First Time Operation - Advanced Energy RFG 1251 User Manual

Operation
6

First Time Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

FIRST TIME OPERATION
After the generator is properly installed on the system and all power, interface, and cooling
water connections have been verified, the following series of tests can be performed to verify
proper operation of the unit. If desired, the RF output of the generator can be connected to a
50 Ω dummy load for this initial testing. If, at any point during this test sequence, the
generator does not perform as specified, an attempt should be made to identify and resolve the
problem. If the problem cannot be resolved, contact AE Customer Service for assistance.
1. Before applying ac power to the unit, verify that the User Port signals are set as follows:
• RF PWR ON must be disabled (pin 4 must be open or grounded).
• The SETPOINT input (pin 5) must be set to zero volts.
• The PWR REG MODE signal (pin 8) should be set for the desired power regulation
mode required by the system (pin 8 open or grounded selects forward regulation
mode, pin 8 pulled high selects delivered power mode).
• The INTERLOCK pins on the User Port (pins 10 and 23) must be connected
together (maximum contact resistance of 15 Ω).
2. Apply 208 Vac power to the generator and activate the circuit breaker on the RFG 1251.
Verify that the green AC ON indicator is lit on the generator and that the AC ON status
signal is active on the User Port (low impedance between pins 24 and 11). All other LED
indicators should be extinguished at this time.
3. Enable the RF output by applying a 4 to 30 Vdc signal to pin 4 (RF PWR ON). Verify that
the RF ON indicator lights on the generator and that the RF STATUS signal on the User
Port is active (low impedance between pins 20 and 7
4. Verify that the analog readback signals from the generator are indicating 0 W of forward/
delivered power (pin 3) and 0 W of reflected power (pin 2). The voltages on these pins
should not exceed 0.010 V when the requested setpoint (pin 5) is 0.
5. Increase the SETPOINT signal (pin 5) to 1.0 V (equivalent to 125 W of RF power). Verify
that the FWD/DELV PWR MONITOR signal (pin 3) indicates the existence of RF power
and that no error conditions are reported (check the LED indicators as well as the status
signals on the User Port). If the generator is being operated into a near-50 Ω, resistive
load, the FWD/DELV PWR MONITOR signal should track the setpoint signal within
10 mV and the REFL PWR MONITOR signal (pin 2) should remain essentially at 0.
6. Continue to increase the SETPOINT signal while verifying that no error conditions are
reported and that the FWD/DELV PWR MONITOR signal tracks the setpoint value. The
maximum allowable setpoint voltage is 10 V (representing a full scale RF output of
1250 W).
5706058-A
RFG 1251 Generator
Operation
Chapter Chapter
6
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