Thermo Miran Sapphire XL Manual 2005 - IE Monitoring Instruments
Thermo Miran Sapphire XL Manual 2005 - IE Monitoring Instruments
Thermo Miran Sapphire XL Manual 2005 - IE Monitoring Instruments
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Chapter 4 Operation<br />
CHANGING THE PATHLENGTH<br />
The SapphIRe analyzer can be set to one of two pathlengths: short (0.5 m) and long (12.5<br />
m). To change the pathlength from the short pathlength (0.5 m) to the long pathlength<br />
(12.5 m), turn the hex recess adjustment clockwise with the pathlength change tool or<br />
9/64 hex wrench. The location of the pathlength adjustment is shown in Figure 4-3. To<br />
change the pathlength from long to short, turn the adjustment counterclockwise. See<br />
Location of Pathlength Adjustment for location of adjustment.<br />
Caution: Do not overturn adjustment.<br />
The rotation angle is approximately 90 degrees but the actual short path position<br />
corresponds to the point at which a push pin engages a notch in a cam. As the pin and<br />
cam are aligned, an indicator rod engages a microswitch which tells the microprocessor<br />
that the gas cell is now at short path.<br />
As the mechanism is being changed from the long to short position, there is a slight<br />
increase in resistance to turning the adjustment. This is normal (caused by the<br />
compression of an internal spring) and should not be construed as a defect. An audible<br />
"click" indicates when the mirror is in the proper position.<br />
Short<br />
Long<br />
Figure 4-3. Location of Pathlength Adjustment and Battery Compartment<br />
4-16<br />
Battery<br />
compartment