Hach-lange 2100 N Laboratory Turbidimeter User Manual User Manual

DOC022.52.802032100N08/2012, Edition 2User Manual

Figure 1 Front overview1 Keypad 4 Cover for the sample cellcompartment2 Sample cell holder 5 Five-digit LED display3 Light shieldFigure 2

User interfaceFigure 4 Keypad1 ENTER key 5 RATIO key2 EDIT (arrow) keys 6 SIGNAL AVG key3 RANGE key 7 PRINT key4 UNITS/Exit key 8 CAL

Figure 5 Indicator lights1 NEPH light 6 Auto Range light2 EBC light 7 CAL? light3 NTU light 8 RATIO light4 Lamp light 9 SIGNAL AVG li

5. Push the power switch on the back of the instrument to turn theinstrument on.Turn the keypad sound off (optional)By default, the instrument makes a

• All nephelometric (turbidity units of measure) calibrations are done atthe same time.• Ratio-on and Ratio-off calibration data is measured and recor

7. Use the oiling clothto apply the oil equallyto the surface of thevial. Remove theexcess oil. Make surethat the vial is almostdry.8. Put the vial

Measure the Gelex stray light standardMeasure the Gelex stray light standard when the instrument is first received. Record the value on the Gelex vial

Measure the Gelex secondary turbidity standardsMeasure the Gelex secondary turbidity standards each time the instrument is calibrated and record the n

7. Push RATIO toselect Ratio on or off.Ratio must be on forGelex standardsgreater than 40 NTU.For the 0–2 and 0–20 NTU Gelexstandards, select theRati

Clean the sample cellC A U T I O N Chemical exposure hazard. Obey laboratory safety procedures andwear all of the personal protective equipment approp

Indexing a single sample cellWhen measuring very low turbidity samples, use a single indexed sample cell or a flow cell for all measurements to get pr

7. Repeat step 6 untilthe lowest value isshown on the display.8. Put an orientationmark on the markingband near the top of thesample cell where thel

Matching sample cellsTo decrease the effects that optical differences among sample cells can have on turbidity measurements, measure samples in matche

7. Repeat step 6 untilthe lowest value isshown on the display.8. Record the value.Put an orientation markon the marking bandnear the top of thesampl

Prepare the sampleProper sampling techniques are important to get accuratemeasurements.Prepare a representative sampleA representative sample accurate

If possible, do not use heat to accelerate degassing. Heat may changethe properties of the suspended particles and cause volatile componentsto come ou

Figure 6 Prepare filtered sample using membrane or glass-fiberfilter1 Filter pump 4 Stopper 7 Filter2 Hose 5 Filter holder3 Filter flask

Measurement• Measure samples immediately to prevent temperature changes andsettling. Before a measurement is taken, always make sure that thesample is

7. Read and record thevalue when stable.Note: To send (viaRS232) a measurementrecord, push PRINT.Measurement techniquesMeasurements may be made with

Ratio on or offRatio on provides very good linearity, calibration stability and a widemeasurement range. Ratio on helps correct for interference when

Table of ContentsSpecifications...

Using a flow cellC A U T I O N Do not use a flow cell with flammable samples or those that containhydrocarbons, solvents, concentrated acids or concen

flow cell, put the glass flow cell in liquid detergent for 24 hours andthen rinse fully.• When measuring many samples of different turbidity, measure

Figure 9 Install a cell adapterRemove a cell adapter1. Carefully pull the cell adapter up until it is half out of the sample cellholder.2. Slowly tur

1. Set switches 1, 2, 3, 4, 5 and 8 to OFF.2. Set switches 6, 7, 9 and 10 to ON. Switch 9 and 10 set to ON sets a1200 baud rate.3. Refer to Setting of

Advanced operationCalibrate the turbidimeter with formazin standardsThe instrument may be calibrated using prepared formazin standardsmade from 4000-N

• In Calibration mode, automatic range and signal averaging on areselected. When calibration is completed, all operational modes goback to the last se

7. Apply a small beadof silicone oil from thetop to the bottom of thesample cell.8. Use the oiling clothprovided to apply the oilequally to the surf

Making 4000-NTU formazin stock solutionW A R N I N G Chemical exposure hazard. Obey laboratory safety procedures and wear all ofthe personal protectiv

MaintenanceD A N G E R Multiple hazards. Only qualified personnel must conduct the tasksdescribed in this section of the document.Clean the instrument

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Prepare the sample...

Replace a fuseD A N G E R Fire hazard. Use the same type and current rating to replace fuses.Replacement parts:• Fuse for 115 V operation, time-delay,

Table 7 Error codes (continued)Error Description SolutionERR03 Low light error1. Put the sample in the instrument again.2. Make sure that the lamp li

1. Turn off the instrument.2. Push and hold CAL.3. Turn on the instrument.The CAL? light flashes. The instrument starts in Calibration mode.4. Calibra

Replacement parts and accessories (continued)Description Quantity Item no.Cell adapter, 19 mm 1 3033600 Filter disks 10 2323810 Filter, membrane (wi

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HACH COMPANY World HeadquartersP.O. Box 389, Loveland, CO 80539-0389 U.S.A.Tel. (970) 669-3050(800) 227-4224 (U.S.A. only)Fax (970) 669-2932orders@hac

Advanced operation...

Table of Contents4

SpecificationsSpecifications are subject to change without notice.Specification DetailsMeasurement method NephelometricRegulatory Meets EPA Method 180

Specification DetailsSample cells Round cells 95 x 25 mm (3.74 x 1 in.) borosilicateglass with rubber-lined screw capsNote: Smaller sample cells (less

on the instrument, will be included with a danger or caution statement inthe manual.This symbol, if noted on the instrument, references the instructio