BUCHI NIRFlex N-500 - Manual (Page 53)

5 Putting into operation
53 NIRFlex N-500 Operation Manual, Version F
Adjusting the pathlength
Now turn the adjustment ring upwards until there is no •
clearance between the adjustment ring and the spacer ring
anymore.
Tighten one of the three socket screws on the adjustment
•
ring by means of the allen key.
Loosen the retaining screw and remove the transflectance
•
adapter from the probe head.
Now tighten the remaining two socket screws on the adjust-
•
ment ring and the socket screw on the spacer ring.
NOTE
The socket screw may be replaced by one of the knurled screws for easier exchange.
The pathlength of the transflectance adapter is now adjusted to this specific probe head, so that both
form a functional unit. The pathlength now matches the engraving of the spacer ring in each case and
no additional adjustment is necessary, when you change from one spacer ring to another.
5 .7 .2 Exchanging the spacer ring
To exchange the spacer ring in order to work with another pathlength, proceed as follows:
Loosen the screw on the spacer ring by means of the allen •
key.
Remove the spacer ring.
•
Take the new spacer ring you want to operate with, slide it •
over the transflectance adapter and tighten the screw.
Exchanging the spacer ring
5 .7 .3 Installing the transflectance adapter to perform measurements
To perform a measurement, slide the transflectance adapter over the probe head and orient it so that
the pin at the probe head is located in the groove of the spacer ring. Tighten the retaining screw.
NOTE
When performing measurements, make sure that there are no air bubbles in the measuring gap
(pathlength) between probe and adapter window by carefully moving the probe head in the sample.
When you do not perform any measurements with the transflectance adapter, store it in the plastic
box.