CALIBRATION AND MAINTENANCE
KI23400/KI27400 UM-2
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Calibration & Maintenance
There are no internal user adjustments. Calibration is performed
without opening the instrument. The optical sensor / connector
assembly is not user serviceable.
Before commencing calibration:
•
Ensure that all devices have been at a stable room
temperature for over an hour, and that the light source is
fully warmed up at the
λ
to be calibrated.
•
Ensure that the equipment used for calibration has current
calibration certificates etc to match your needs.
•
Ensure that all patch leads are in good condition, Clean all
optical connectors very carefully.
•
Note that if using laser or LED sources, the calibration
accuracy will be inferior to the method used by Kingfisher.
Please use an APC connector into the power meter, to avoid
line reflections.
Note: instrument is powered externally during calibration.
Perform calibration as per instructions below. When calibration is
completed, place an anti-tamper label over the calibration contacts
hole. Do not forget to update your calibration records and to schedule
the next calibration service.
Power Meter Calibration
Calibration is a transfer process. It is performed by setting up a light
source at a stable, but non-critical power level between 0 and -30 dBm
and adjusting the meter reading to the same value as that shown by a
reference meter.
Required are laser and LED light sources with accurate, calibrated
λ
and good power stability, a power meter with appropriate calibrated
λ
,
single mode and multimode test leads. Check the calibration
certificates on your reference equipment to ensure current validity.
Known calibration constants can be re-entered directly without using
other equipment. This is useful in case old calibration constants are to
be put back.
Record the existing calibration offsets, re-enter, or adjust known
offsets at this point or calibrate the meter at the selected
λ
as follows:
•
Remove batteries, connect to external USB power
•
Using tweezers, place a link across gold plated calibration
contacts inside battery compartment, Figure 2. Turn on
external power via micro USB.
