VersaPulse Select - Energy Monitor and Automatic Laser Calibration

CAL & ADJUST
3-5
Versapulse Select Service Manual
0621-499-01 03/94
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b.) Confirm that the aiming beam is visible at the fiber output and that the aiming beam intensity
properly responds to touch screen intensity control.
c.) Place the system in STANDBY, then depress the footswitch. Confirm the system does not fire.
d.) Go to READY and fire the system a number of times, verifying that the system displays the
cumulative energy. Stop firing, then press "clear" and verify the counter returns to zero.
e.) Unplug the footswitch and verify the system goes to STANDBY and displays "Attach footswitch".
f.) Open the front door and verify the system shuts down. Defeat the interlock and confirm that the
system turns back on.
g.) Remove the fiber optic. Verify that the system goes to STANDBY and "Attach fiber" is displayed.
Replace the fiber optic and verify that the fault clears.
h.) Remove the blast shield. Verify that the system goes to STANDBY and "Install blast shield" is
displayed. Replace the fiber and confirm that the fault clears.
i.) Check the operation of the keyswitch. It should turn the system on, turn the system off, and only
be removable when the system is switched off.
j.) Confirm that the emergency off button shuts the system down.
3.3 ENERGY MONITOR AND AUTOMATIC LASER CALIBRATION
The energy monitor calibration adjusts the three energy monitor circuits to output 2.2 volts per Joule of energy
as measured on a calibrated power meter at the output of an attached fiber. The automatic laser calibration (also
referred to as "autocalibration" and "autocal") is run to allow the system to determine and store the capacitor
voltages required to provide the maximum and minimum pulse energies for each rod.
1. Set up.
Open the front door of the VersaPulse Select and defeat the door interlock. Connect a known good
test fiber to the fiber port and direct its output into a calibrated power meter. Connect an oscilloscope
probe to CPU PCB TP2 (ENERGYI).
2. Turn on the system and go to service mode.
3. Turn off three rods, leaving one on. Select 40 Hz, then go to READY.
4. Adjust the cap voltage for a fiber output of 10 watts (1 Holmium head).
Fire the laser into the power meter, adjusting cap voltage up/down to get 10 watts of average power
at the power meter. Once the charge voltage is set to provide a consistent power meter reading of 10
watts, stop firing and leave the cap charge at that setting.
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