Technical data

60 Agilent 6200 Series TOF and 6500 Series Q-TOF LC/MS System Concepts Guide

2 Instrument Preparation

Storage and retrieval of tune results and Instrument Mode

You can store the tuning parameters in a single file (*.tun) using

the Save or Save As buttons in the Instrument State tab. You

can also load tune files in the Instrument State tab (Figure 23).

The Mass Range, the Fast Polarity Switching option, the Slicer

Mode, and the Instrument Mode are also stored in the tune file.

Instrument Modes

You select from four different instrument modes.

High Resolution (4 GHz, High Res Mode) In this mode, the

system acquires data at a 4 GHz ADC rate while special

processing is performed in real time on the mass peaks detected

in each transient, weighting the apex data of the mass peaks

much more heavily than the shoulders. This leads to narrower

peaks in the summed transients (the mass spectra) and hence

improves resolution. The Mass Range can only be set to Low

(1700 m/z) or Standard (3200 m/z) if the Instrument Mode is set

to this value.

4 GHz (High Resolution Mode disabled) In this mode, no

processing is used at the transient level; however, the system

acquires data at a 4 GHz ADC rate. The Mass Range can only be

set to Low (1700 m/z) or Standard (3200 m/z) if the Instrument

Mode is set to this value.

Figure 23 Instrument State tab