Firma:                Merck-Hitachi

Modell:              L-7485

Kommentar:      Dokumente deut.

Specifications

Photometric principle              Ratio photometry; intensity of transmitted beam is monitored.

Light source                            150 W xenon lamp

Excitation wavelength

setting range                           200 to 850 nm, and zero order

Emission wavelength

setting range                           250 to 900 nm, and zero order

Note that photomultiplier raust be changed at emission wavelengths greater than 731 nm.

Excitation side spectral

bandwidth:                               15 nm

Emission side spectral

bandwidth                                15,30 nm(variable)

Wavelength setting                 By keyboard or through

communication

Wavelength accuracy             ±3 nm

Wavelength repeatability         ±0.5 nm

Recorder output                      10 mV full scale

                                               Full scale range of 1 to 1000 is settable in increments of 1.

Processor output                    1 V full scale; digital output of -40 (-40 mV) to 1000 (1000 mV) via D-line.

Response                                Changeable in 5 steps, corresponding to time constants of 0.1, 0.5, 2.0, 4.0, 8.0 seconds.

Sensitivity                                            S/N ratio of 350 or higher with Raman spectrum of water (wavelength: 350 nm, time constant: 2.0 s)

Auto zero range                       0 to 1000

Offset                                      0 to 1000 (settable in steps of 1)

Spectrum memory                  Up to 8 excitation or emission spectra can be stored.

Marker                                     Marker output of approx. 0.6 mV at recorder terminal (corresponding to about 6 graduations on Chart)

Instrument parameter

setting                                      Following parameters are settable and stored in battery-backed-up memory when power is turned off.

•                                               Full scale range

•                                               Spectrum measuring range

•                                               Photomultiplier applied voltalte

•                                               Offset value

Time program                         No. of programs            9

                                               Settable time                  Up to 600 minutes in increments of 0.1                 minute

                                               No. of steps storable     Up to 100 steps for a total of 9 files

                                               Programmable items              Excitation wavelength, emission wavelength, baseline processing

Display function                       40 characters x 2 lines on backlighted LCD

Communication function         D-line communication

External output terminals        Analog output

•                                               For processor 1 V full scale

•                                               For recorder; 10 mV full scale

External I/0 contact

terminals                                 Time program Start, error input/output, busy output (Above contacts are incorporated in D­line connector, and effective with analog connection.)

                                               Auto zero input, marker input, lamp off input

Flow cell capacity                    Standard cell 12 µL (irradiated capacity)

Flow cell withstand pressure 2.9 MPa

Operating temperature range4 to 35 °C

Operating humidity range        45 to 80% RH (non-condensing)

Power requirement                 100-115, 220-240 V AC, 50/60 Hz

Power consumption                420 VA

Dimensions                             260 mm W x 500 mm D x 230 mm H

Weight                                     Approx. 19 kg