DIALAB DTN-410 K, Руководство пользователя

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I 10 I
DIALAB PHOTOMETER DTN-410K USER MANUAL
This instrument’s calculation routine is always a quadratic interpolation by using a set of ten
different mathematical functions. The logarithm of concentration is an added feature. This
enables graphic printouts of curve in semi-logarithmic format.
Curve fitting is performed by Least Squares method applied to a quadratic function.
The auto-calibration and incorporated control programs ensures maximum reliability of
instrument’s output, and fast diagnostics and verifications.
Measurement printout of operation methods, methods stored in memory, calibration curves
and kinetics are obtained through the graphic printer, enhancing information displayed in the
20x40 character liquid crystal display; backlight ensures comfortable viewing from any
angle.
A 25 key touchpad keyboard, co-related to displayed functions, provides user with simple
and clear prompts.
Serial RS232C interface allows bi-directional communication with PC IBM compatible
computers and accessories.
The equipment’s optical system consists of a highly collimated photometer, with stepper
motor driven filter wheel, and high quality interferential filters.
Factory pre-focused lamp reduces the need for tedious calibration after replacement.
Calibration curves and factors are not affected by lamp change.
1.2 Technical specifications
Methods:
Enzymes. Substrates. Electrolytes. Hormones. Drugs.
Optical system:
Principle: monochromator with interferential filters.
Wavelength range: 340-1000 nm.
Wavelength selection: automatic 9-positions filter wheel.
Factory mounted filters: 340, 405, 450,505, 550, 620 and 750 nm.
Bandwidth: 10 ± 2 nm.
Photometric range: -0.5 to 4.000 Abs.
Precision: +/- 0,002 Abs.
Linearity: better than ± 1,5% from 0 to 1,500 Abs.
Light source: halogen lamp 6 V 10 W.
Zero: automatic.
Reading: monochromatic and bichromatic.
Cuvette system:
Two –way cuvette system
1. Metallic microflow cell: 18 ml – 10 mm light path with temperature control by Peltier
system. Temperature: variable, pre-adjusted 25ºC, 30ºC and 37ºC. Stability ± 0.1ºC.