Hach DR 2800 5.5.5 Sample blank

54

Standard Operations

5.5.5 Sample blank

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

procedure. Other barcode tests use the reagent test vials to

determine the sample blank. Please refer to the Hach procedure for

method-specific instructions.

Save as User Program To store the selected parameters as a User Program, see section6.1 on page 61.

Recall Data Call up saved measurement data or time courses, see section5.3 on page 37.

InstrumentSetup Basic data of the instrument, see section 5.2 on page 27.

Table 5 Barcode program options (continued)

Options Description

Contents

Main Page Table of Contents Page Table of Contents Page Section 1 Specifications Specifications are subject to change without notice. Page Section 2 General Information 2.1 Safety information LASER CLASS 1 2.1.1 Use of hazard information 2.1.2 Precautionary labels 2.2 Overview of product Section 3 Installation 3.1 Unpack the instrument 3.2 Operating environment 3.3 Power connections 3.4 Connection 3.5 Cell compartments, Cell adapters, Light Shield and Protective Cover 3.5.1 Cell compartments and adapters Page Page Page Page 3.6 Mobile use of the DR 2800 for field analysis 3.6.1 Position the Protective Cover 3.7 Beam path Page Section 4 Start Up 4.1 Power the instrument on and off 4.2 Language selection 4.3 Self-Check Start Up Section 5 Standard Operations 5.1 Overview 5.1.1 Tips for the use of the touch screen 5.1.2 Use of the alphanumeric keypad 5.1.3 Main Menu Table 2 Main Menu Options DR 2800 5.2 Instrument Setup mode 5.2.1 Operator ID 5.2.2 Sample ID 5.2.3 Date and time 5.2.4 Display and sound preferences 5.2.5 Power Management Page 5.2.6 PC and printer 5.2.6.1 Printer setup Page 5.2.6.2 Print data 5.2.6.3 HACH Data Trans 5.2.7 Password 5.2.7.1 Password deactivation Page 5.3 Store, recall, send and delete data 5.3.1 The data log 5.3.1.1 Auto/manual data storage 5.3.1.2 Recall stored data from the data log 5.3.1.3 Send data from the data log Page 5.3.2 Time Course 5.3.2.1 Data Storage from Time Course 5.3.2.2 Recall Stored Data from Time Course 5.3.2.3 Send Data from Time Course 5.3.2.4 Delete Stored Data from Time Course 5.4 Stored Programs 5.4.1 Select a saved test/method; enter user-specific basic data 5.4.2 Stored program options Table 4 Stored programs options (continued) 5.4.3 Use of program timers 5.4.4 Set the dilution factor 5.4.5 Run a standard adjust 5.4.6 Set the chemical form 5.4.6.1 Change of the default setting of the chemical form 5.4.7 Run a reagent blank 5.4.8 Analysis of samples 5.4.9 Add stored programs to the favorite programs list 5.5 Barcode Programs 5.5.1 Complete a barcode 13 mm test/vial 5.5.2 Select the measuring range 5.5.3 Select the chemical evaluation form 5.5.3.1 Change of the default setting of the chemical form 5.5.4 Basic test-specific and sample-specific data settings 5.5.5 Sample blank 5.5.6 Update/edit barcode tests 5.5.6.1 Manual update of a barcode test Page Page 5.5.6.2 Update an existing barcode test 5.5.6.3 Program a new test 5.5.7 Upgrade of the instrument software Page Section 6 Advanced Operations 6.1 User Programs 6.1.1 Program a user method Page 6.1.1.1 Single wavelength settings 6.1.1.2 Multi wavelength settings Page 6.1.1.3 Calibration settings for single and multi wavelength mode Page Page Page 6.1.1.4 Store a user program 6.1.1.5 Additional user-defined parameters and functions Page 6.1.2 Free programming program type 6.1.2.1 Measurement process 6.1.2.2 Enter a new element of a measuring sequence Page 6.1.2.3 Enter the calibration formula (evaluation formula) Page Page 6.1.2.4 Enter variables 6.1.2.5 Save a free programming user program 6.1.3 Select a user program 6.1.4 Add, edit and delete user programs from the favorites list Page 6.2 Favorite Programs 6.2.1 Recall a favorite program 6.2.2 Delete a favorite program 6.3 Standard Addition monitoring/checking results 6.3.1 Complete a standard addition Page Page Page 6.4 Single Wavelength (absorbance, concentration and transmittance measurements) 6.4.1 Set up single wavelength mode Page Page 6.5 Multi-Wavelength mode measurements at more than one wavelength 6.5.1 Set the reading mode at different wavelengths Page Page Page 6.6 Time course of absorbance/transmittance 6.6.1 Time course setup parameters 6.6.2 Time course scan reading 6.6.3 Analysis of time course data 6.6.3.1 Navigation of a time scan or a time scan analysis 6.7 System checks 6.7.1 Instrument information 6.7.2 Upgrade of the instrument software 6.7.3 Optical checks 6.7.3.1 Wavelength check 6.7.3.2 Stray light check 6.7.3.3 Absorbance check 6.7.3.4 Verification kit Page Page 6.7.7 Service time Page Page Page Section 7 Maintenance 7.1 Cleaning requirements 7.1.1 Spectrophotometer 7.1.2 Display 7.1.3 Cuvettes/sample cells 7.2 Insert or change of the battery 7.2.1 Information about using the battery 7.2.1.1 Dispose of the lithium battery 7.2.1.2 Optimal operation of the battery 7.2.1.3 Lifespan of the battery 7.2.1.4 Load the battery/Operating time 7.3 Lamp replacement Page Page Page Section 8 Troubleshooting fails, please contact the manufacturer or distributor. Page Section 9 Replacement Parts Page Section 10 Contact Information Page Section 11 Limited Warranty Limitations Limitation of Remedies Page Index