Hach DR 5000 用户手册

Turbidity and color in the sample matrix can falsify the results of a 
photometric analysis. The interference factors come from the 
sample or are created by reactions with the reagents.

The influence of turbidity and/or color can be eliminated or reduced 
by taking a sample blank reading.

In the barcode mode, a special cuvette/vial (TNT919) containing 
the sample blank is placed in cell compartment #1 after the sample 
reading has been taken and is automatically measured. The 
sample reading is then corrected by adding or subtracting the blank 
value. The final result is displayed, with the message "After blank 
value corr.".

Some barcode tests do not require a sample blank value to be 
determined, as turbidity and color are dealt with during the test 

To send data to a printer, computer or USB memory stick (Type A)

This functions as a stopwatch. It helps to ensure that the steps of an analysis are correctly timed 
(e.g. reaction times, wait times, etc., can be exactly specified). When the specified time has 
elapsed, an acoustic signal is emitted. The use of the timer has no influence on the measurement 
program.

A corrective dilution factor can be entered in order to take account of certain properties.
The number entered at the dilution factor prompt will be multiplied by the result to compensate for 
the adjustment. For example, if the sample has been diluted by a factor of 2, enter 2. The default 
setting of the dilution factor is turned off.
Note: When a dilution is in effect, the dilution icon will appear on the display.
Note: If undiluted samples are used, set the dilution factor off.

Some of the stored tests/methods allow to select the chemical form and the measuring range.

To modify an existing program

To store the selected parameters as a User Program, see 

.

Call up saved measurement data, wavelength scans or time courses, see 

.

Basic data of the instrument, see