Metrohm NIRS Analyzer PRO - Manual (Page 54)

52 ▪▪▪▪▪▪▪
13.2 MicroBundle Fiber Optic Sensing
First, verify that the Data Collection Method is correctly set up.
1. Please verify that the Sampling
System appears as shown below,
in the area marked by the box.
Note that the drop-down menu
shows three different types of
probes which may be used. We
will use the Interactance
Reflectance Probe with Purge.
This probe is normally configured
with a “Purge” time and a “Settle”
time set in the DCM. The exact
settings will depend upon a
number of application factors,
and are quite product-specific.
Some experimentation may be
required to find the best
combinations.
For our purposes now, we will leave the purge and settle settings at “0”.
2. Click on OK if setting up the DCM, then select it in the “Select Data Collection Method”
window as shown in the previous section of this manual.
If using the View DCM command, simply click on “Close”.
13.2.1 Performance Test
It is wise to run Performance Test to verify that the instrument is fully warmed up and operating
correctly.
For testing purposes, we suggest the probe end be securely
clamped in place.
This photo shows a common testing clamp, which attaches to
the side of a cart in the laboratory. Using this method, the fiber
optic probe can be placed upright, and the reflectance
standard cells are held securely in place by gravity. This avoids
any gaps, or inaccuracy caused by too much compression.
The clamp is a Double-Buret Clamp, part number 05-779Q,
available from Fisher Scientific. At the time of writing, the price
is less than $60 US.
Follow these steps to run Performance Test: