Mantis 5000 Especificaciones descargar pdf (Pagina 80)

UV/VIS 0%T Correction

This calibrates the photomultipliers for 0%T (electronic zero) effects. This is executed

every time the instrument is switched on except if a DRA is installed (where the DRA

correction factors stored in the DRA EEPROM are used).

Instrument check: If high precision is needed at high absorbance, measure the 0%T error

at 500 nm in the UV-VIS (blocked sample beam). The error should be less than 0.01 %T.

Calibrate with the instrument fully warmed up. It may be desirable to calibrate Calibrate

PGA prior to this. Click here

for the instrument parameters.

NIR 0%T Correction

This is the NIR equivalent for 0%T error.

Instrument check: After instrument has fully warmed up, go to wavelength 1200 nm with

grating change at 800 nm and block the sample beam with a black metal mask. If the

error exceeds 0.1 %T calibration may be required.

Calibration using Cary Win UV Software

The recommended method for performing calibration is by using the Auto Calibrate

function in the Validate application.

Caution

Both instrument and DRA are calibrated at the factory and should be recalibrated only

when tests indicate the need for it. Failure to complete or the use of incorrect filters may

render the instrument unusable.

Signal processing

This causes the Cary system to calibrate the programmable gain amplifiers on the

photomultiplier tube. This test is performed during initialization of the Cary

4000/5000/6000i instruments.

UV/Vis 0 %T correction

This causes the Cary system to close the shutter and calibrate the UV/Vis detector for 0

%T errors. If a DRA is connected a mask must be placed in front of the transmission port

(rear instrument beam) during the calibration process. The software will prompt you for

this.

Note

This calibration is part of the normal initialization procedure, however calibration

is advised when working at high absorbance where a repeat calibration after the

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Mantis 5000 Especificaciones Pagina 80