Waters 2489, Руководство оператора

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Using the operator interface 3-33
Changing from single to dual wavelength mode
To change from single to dual wavelength mode:
1. From the absorbance (or HOME) screen when in single wavelength
mode (the wavelength icon shows
λ
), press the
λ/λλ
key (Shift Auto
Zero). This key toggles between single and dual wavelength modes.
A momentary message (“Setting up dual wavelength mode”) appears.
Wavelength mode change message (for dual wavelength)
2. Enter the wavelength to be monitored in the
λ
field, then press Enter.
3. Enter the other operating parameters and any timed or threshold
events, if desired.
4. Press the A/B key to switch channels. The absorbance screen for the
other channel appears.
5. Enter the operating parameters for the second wavelength to be
monitored, including any timed and threshold events, if desired.
For more information on operating the detector in single wavelength mode,
see
“Operating the detector in single wavelength mode” on page 3-31 . For
more information on programming timed and threshold events, see
“Programming timed events, threshold events, and methods” on page 3-35 .
Tip:
• If both selected wavelengths are greater than 370 nm (+/– 1 nm), the
detector applies the second order filter to block unwanted UV light.
• If both selected wavelengths are less than 370 nm (+/– 1 nm), the
detector removes the second order filter.
• If the selected wavelengths bracket the 370 nm (+/– 1 nm) threshold, the
detector does not apply the second order filter and issues a warning
message that any data collected for the wavelength above 370 nm may