PN 350-0453000-02
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6
Optimizing the MCT Pre-Amp Gain
The MCT pre-amp gain has been adjusted at the PIKE manufacturing facility. It most likely will not
require further adjustment. However, adjustments may be required especially if using different probe
types which exhibit large relative energy differences reaching the detector. For example, the gain is set
higher for a diffuse reflectance probe compared to an ATR probe.
Figure 5: Illustration of MCT detector alignment point
The gain should be adjusted to allow 50% of total energy counts or voltage registering on the detector.
To adjust the gain, remove the gain cap from the front of the base optics. Access the gain screw using a
small screwdriver.
Removing the FlexIR Accessory
Turn off the power to the FTIR spectrometer.
WARNING:
Do not disconnect the detector cable before turning off the FTIR. Failure to do this may
cause damage to the FTIR and/or FlexIR electronics.
Remove the signal/power cable from the FTIR spectrometer and remove the FlexIR accessory from the
sample compartment.
Storage
Place the FlexIR fiber optic accessory into the plastic bag
provided to protect its optics from dust.
Gain Adjustment Screw
