Clarity discussion forum

Dear collegues,

is it possible to set a detector to zero repeatedly during one singel analysis? What settings are necessary?

Do you have some experience with this problem?

Thank you in advance.

Rembert Forche

Dear Rembert,

There are several possibilities to handle detector zero in Clarity and I am not sure which do you have on mind.

There are Clarity commands available in the DataAcquisition window Analysis menu: Set Zero and Reset Zero. Those commands apply (or remove) an offset to the measured signal. They are not active during analysis, as they will modify the acquired data. They also apply to the signal after it is acquired, thus will not help if the detector signal is out of the A/D board input range.

Other possibility is to zero the detector by its external Autozero contact. This can be done by using the Clarity digital output controlled from method Event table, and can be repeatedly performed during the analysis. This can be even done based on the signal value (condition Input>), thus zeroing the detector automatically when drifting out of range.

The last possibility is for detectors with digital data acquisition (at present time the Agilent 1100 DAD, MWD, VWD, RID), when then autozero can be programmed in the respective detector Time table or performed manually from the software.


Ivan Vins

DataApex