Operating and Maintenance Instructions – 26
Verifying Calibration
To verify calibration:
1. With the attenuator powered off (O), clean all optical connections before each connection
with an alcohol-soaked swab. See the Cleaning Connectors section.
2. To avoid reflection-induced source power changes, ensure that the connector to the power
meter has low reflection or that the source has an isolator.
3. Zero the power meter.
5. Connect the source to the attenuator, and connect the attenuator to the power meter
(Figure 10).
Figure 10: Wavelength Verification Setup
6. Set the power switch on the attenuator to l (on), and verify that both the attenuator and the
power meter are set to the same wavelength as the source. Ensure that the ∞ key LED is
off.
7. Set the attenuator to zero, and record the value displayed on the power meter.
8. Increase the attenuation in 1 dB steps until the attenuator reads 90 dB. After each step,
record the value displayed on the attenuator and the value displayed on the power meter.
9. Apply the following formula to each reading:
(attenuator reading - 0) - (power reading - power reading with the attenuator set to 0)
10. If the resulting data indicates that the attenuator is no longer operating within the
specifications stated in the Specifications section, return the attenuator to the factory for
recalibration. Recalibration is recommended every two years.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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