Standard operations – Hach-Lange DR 2800 eco User Manual
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Standard Operations
Send Data icon /
Send Data
To send Data to a printer, computer or USB memory stick (Type A)
Timer icon
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.
Dilution Factor Off/On
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 1, corresponding to no dilution.
Note: When a dilution is in effect, the dilution icon will appear on the display.
Standard Addition
This enables the accuracy of the measurements to be checked. The (working) procedure for a
test parameter contains a detailed explanation of how to use this function.
Standard Adjust
The (working) procedure for a test parameter indicates whether a standard adjustment is
necessary and, if so, how to proceed.
ChemicalForm
Some of the stored tests/methods allow you to select the chemical form and the measuring
range.
Reagent Blank
Some of the stored tests/methods include the "Reagent Blank" function. This enables the reagent
blank value to be added to, or subtracted from, the subsequent readings. The reagent blank
value shifts the calibration curve along the y-axis, without changing the shape or gradient of the
curve. The effect corresponds to a y-axis intercept of the calibration straight line. This is made
clear by the following equation: Concentration = [(Conc. factor) * Abs] – (reagent blank value).
Save as User Program
To store the selected parameters as a User Program, see
6.1 User Programs (DR 2800 only) on
Recall Data
Call up saved measurement data or time courses, see
5.3 Storing, Recalling, Sending and
.
Instrument Setup
Basic data of the instrument, see
5.2 Instrument Setup Mode on page 29
.
Table 5 ”Stored Programs“ options (continued)
Figure 11 Options
Options
Description