Iridex IQ 577 - Verifying the Power Calibration

30 IRIDEX IQ 577
®
/IQ 532
®
Laser Systems Operator Manual 15510-EN Rev G
Verifying the Power Calibration
ToensurethatcalibrationmeetstherequirementsoftheNationalInstituteofStandardsand
Technology(NIST),thelasertreatmentpoweriscalibratedattheIRIDEXfactorywithapowermeter
and an IRIDEX delivery device with previously measured transmission.
Periodically, and at least annually, the actual power being delivered through IRIDEX delivery
device(s) should be measured to verify that the laser system is still operating within factory
calibration parameters.
Regulatory agencies require that manufacturers of US FDA CDRH Class III and IV and IEC 60825
Class 3 and 4 medical lasers supply their customers with power calibration procedures. Only IRIDEX
trained factory or service personnel may adjust the power monitors.
tO vErify thE pOwEr caliBratiON:
1. Make sure all persons in the room are wearing the appropriate laser safety eyewear.
2. Connect a properly functioning IRIDEX delivery device or test fiber.
3. Center the aiming beam on the power meter sensor. Measurement equipment must be capable of
measuring several watts of continuous optical power.
CAUTION: A spot size of less than 3 mm diameter can damage the power meter sensor.
4. Set the laser Duration to 3000 ms and the Interval to Single Pulse, when a CW delivery device is
connected. Set the Duration to 3000 ms, MicroPulse Duration to 1.0 ms and MicroPulse Interval to
1.0ms(50%DutyFactor)whenaMicroPulsedeliverydeviceisconnected.
5. Set the laser Power to 200 mW
6. Place the laser in Treat mode.
7. Direct the aiming beam from the IRIDEX delivery device onto the power meter, following the
power meter instructions for sampling the laser power.
8. Actuate the footswitch to deliver the treatment beam. Record the stabilized power meter reading
in the table below. This value represents the average power delivered by the device.
9. Set the power to 500 mW, actuate the footswitch to deliver the treatment beam, and record
the reading.
10. Set the power to 1000 mW, actuate the footswitch to deliver the treatment beam, and record
the reading.
11. Set the power to 2000 mW, actuate the footswitch to deliver the treatment beam, and record
the reading.
12. If the readings fall outside the acceptable levels, check the power meter, ensure that you have
accurately placed the beam on the power meter, and check the readings again with another
IRIDEX delivery device.
13. If the readings are still outside the acceptable levels, contact your local IRIDEX Technical Support
Representative.
14. Place a signed copy of the table in your device records to refer to during use and service.