Warranty Extensions

All OLIS clients are encouraged to keep their instruments under warranty for immediacy of support and repairs and (frankly) for our fiscal stability. Our full staff is available to every user of all OLIS equipment for free under the first year warranty. Your need for support will not end at that point, and our need for your assistance in covering the costs of top quality support personnel, immediate repair/ replacement hardware, and software updates does not end either. By honoring our request for an annual warranty extension at less than 5 % of the original purchase price of each OLIS product, we both win. Thank you for helping us offset the price of keeping top tier support staff in place for your use. Request a price quotation for a single or multiple year warranty extension here. [sales@olisweb.com]

Problems & Solutions: Olis-modernized Cary 14/17

SYMPTOM: Strange Absorbance Spectrum (Holmium Oxide)

When your instrument is set up properly and everything is functioning correctly, you can obtain the holmium oxide filter scan shown in Figure 1. Figure 2 shows the PM OUTPUT reading that will appear on a dual-channel oscilloscope when the holmium oxide filter scan shown in Figure 1 is being made. Note: the sample value is very small since the sample is absorbing the light.

Absorbance is calculated using the following equation: ABS = LOG [REF-DARK/ SAM-DARK]

Therefore, if the absorbance is very small and the dark value is larger due to a light leak or other problem, sam-dark becomes negative.

Since calculating the log of a negative number is not possible, the computer returns a nonsense value of 5. The return of a value of 5 is a feature we programmed into the software to alert the user that the software attempted to calculate the log of a negative number, which will occur only if there is some malfunction. Figure 2, a holmium oxide filter scan collected with a malfunctioning instrument, illustrates this software feature.

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