5
Mode Indicator: Show the current measurement mode (T--%Transmittance, A--
Absorbance, C--Concentration, and F--Factor) (refer to Figure-3).
LCD Display Mode 0A/100%T 0%T Print/Enter
Sample compartment Wavelength Knob
Figure-3 UNICO
®
1200 Spectrophotometer
MODE Button: There are four modes.
¾ T mode is transmittance mode;
¾ A mode is absorbance mode;
¾ C mode is to measure unknown sample concentration through a standard solution;
¾ F mode is to measure unknown value with a previously determined factor.
∧ (0A/100%T) Button: Adjust Digital Display reading to 100%T or 0.000A when blank
reference solution is in the Sample Compartment.
∨ (0%T) Button: When in T mode, put S-1200-111 into the Cuvette Holder to block the
optical light beam. Press ∨ button to adjust the Digital Display reading to 00.0%T.
ENT (PRINT) Button: When pressed:
At A and T modes, send the displayed results to printer;
At C mode, set the concentration value (refer to Concentration Mode in Basic
Operation section);
At F mode, set the factor number and change to C mode (refer to Factor Mode in Basic
Operation section); If you want to print the test results at C mode, push the MODE
button to the position when the LED light is off, then push the ENT button;
Sample Compartment: Accept 10 mm test tube or 10 mm square cuvette (with
different cuvette holders). The compartment can accept up to 50 mm pathlength
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