LumaSense Technologies M67 - Manual (Page 36)

M67, M67S Manual
35
10. Operation
10.1 Startup
The basic steps in the startup procedure for the INFRADUCER are as follows:
 Check circuit integrity.
 Check horizontal alignment
 Check vertical alignment
 Check for background radiation/reflection.
 Set emissivity.
 Stabilization with ambient temperature
Each of these steps is explained below.
10.1.1 Checking circuit integrity
When the INFRADUCER loop is powered up, at least 4mA should flow. If not, the polarity of the connections should be
checked. The M67S has a built in polarity indicator. When 4mA or more is flowing through the loop, the LED on the rear panel
will glow, indicating correct connection.
10.1.2 Checking alignment
The M67S, with its through lens sighting, makes aiming very easy. Point the sensor at the object to be measured, look through
the view finder. Rotate the eyepiece so that the reticle is in focus. Adjust the position of the sensor so that the object to be
measured fills up the field of view as outlined by the inner reticle. If the instrument has a 15:1 F.O.V., then no reticle is present,
and the entire view finder should be filled with the target. Adjust the focus knob to maximize the sharpness of the image.
10.1.3 Checking horizontal alignment
For relatively small targets, accurate aiming is essential. The proper horizontal alignment is checked by moving the
INFRADUCER back and forth, holding the vertical position constant. The correct position is that at which the output signal
reaches a maximum value. A hot soldering iron placed in the field of view can help to locate the optical axis of the
INFRADUCER provided its temperature is within the range of the instrument.
Note that several accessories are available for long distance aiming for use with the Protective/Cooling Jacket.
10.1.4 Checking vertical alignment
This is done analogously to the previous step. The horizontal position is held constant while the vertical position is varied until
a maximum reading is found.
10.1.5 Checking for background radiation/reflections
This may be accomplished by the methods described in Section 6.3, page 13 and Section 6.4, page 13. If the target is at least
50% greater than the minimum target diameter (calculated at the actual distance from the INFRADUCER using the method
described in Section 6.2, page 12), there will be no influence from background radiation.
If use of a temporary shield (to eliminate the effect of any reflections which may be present) shows a change in the
INFRADUCER reading, a permanent shield must be installed.
If you are not sure about the manner in which the procedure described in this manual should be implemented, please contact
/XPD6HQVH.
10.1.6 Set emissivity
The procedure to be followed is described in Section 9.1, page 33 and Section 9.2, page 34 of this manual.