EXFO T100S-HP Essential, User Manual, Page: 38 / 70

Calibrating the Product
38 T100S-HP User Guide
6.2 Performing Internal Wavelength Referencing
Subject The T100S-HP internal referencing system ensures optimum calibration of the laser
source as soon as the system starts.
We recommend you to perform an auto-calibration after the first half hour of system
warm-up or use.
The T100S-HP automatically performs a self-calibration procedure (also called Internal
Referencing) during the initialization routine: see section
Initializing the Laser, p. 25
.
In addition to the self-calibration performed at start-up only, you can instruct the system
to perform a new auto-calibration at any time, as explained in the following procedure.
Before Starting Make sure the Remote Interlock switch is closed: for laser safety reasons the T100S-HP
features a Remote Interlock connector at the rear-panel that can connect to an external
remote interlock switch. When the interlock switch is open, the laser output is turned off.
Remote interlock sets the system current and power to 0 mA and 0 mW, respectively.
Therefore, as long as the system is in remote interlock mode, it cannot perform any self-
calibration or internal referencing.
Procedure 1. Press the 2nd + I function keys to start auto-calibration.
2. The T100S-HP performs its internal referencing routine and the message
Referencing…
appears.
• After calibration is complete, the T100S-HP restores the initial wavelength value
in effect at the time auto-calibration was performed.
• If auto-calibration has failed, the following message appears:
Referencing
error. Press Enter
.
Press the Enter key to cancel the calibration. The system current internal
wavelength referencing remains unchanged.
Important
When the system is subject to substantial changes of operating environmental
conditions such as a sharp change in room temperature or mechanical
vibrations, you must run a new system auto-calibration procedure, as specified
below.
Warning
While the system performs an auto-calibration, the T100S-HP produces a
laser beam, even if the system is in
Disable mode.
To avoid eye damage, do not look into the laser output or into the end of an
optical cable. Even though the laser radiation is not visible, the intense
infrared light can cause eye damage.