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47

SECTION 4

AIR PURGE SYSTEM

4.1

Air Purge Connection

An air purge system is provided to purge the optical compartment with dry air to
prevent condensation on the outside of the sample cell when measuring cold
samples. This system is particularly useful when using the Flow-Thru Cell
assembly.

Note: Do not exceed 138 kPa
(20 psig).

Dry nitrogen or instrument grade air (ANSI MC 11.1, 1975) up to 138 kPa
(20 psig) can be used to air purge the optical housing compartment. The
recommended air consumption rate is between 3 and 10 SCFH (standard cubic
feet/hour). The connection is made at the Air Purge fitting on the rear panel.

When the sample temperature is expected to be near or below 2

°

C (35

°

F), use a

desiccant dryer and particle filter to assure the dew point of the air purge is below
the sample temperature. The air dryer contains silica gel desiccant that turns pink
when exhausted. Life expectancy of the desiccant depends on the moisture content
of the air.

If only shop air is available, use a coalescing filter with automatic drain in
conjunction with a dryer and particle filter to achieve instrument quality air. Life
expectancy of the coalescing filter should exceed 2000 hours. Change the particle
filter at the same time as the air dryer. Figure 7 illustrates methods of connecting
the two types of air supply to the instrument. The dryer and filter are not necessary
if dry nitrogen is used for the air purge.

Figure 7

Air Purge Connections

Содержание Lange 2100AN

Страница 1: ...47001 88 MODEL 2100AN LABORATORY TURBIDIMETER INSTRUMENT MANUAL For Use With Software Version 1 Hach Company 1993 1997 1999 2000 All rights reserved Printed in the U S A 8 95 2ed aa dp Rev 6 2 00...

Страница 2: ...om HachLink Hawkeye The Hach Guy HexaVer HgEx HydraVer ICE PIC IncuTrol LeadTrak m ColiBlue24 ManVer MolyVer Mug O Meter NetSketcher NitraVer NitriVer NTrak OASIS On Site Analysis Results You Can Trus...

Страница 3: ...g Silicone Oil 18 2 3 3 Preparing Dilution Water 19 2 3 4 Indexing and Matching Sample Cells 20 2 3 5 Removing Air Bubbles Degassing 23 2 3 6 Signal Averaging 25 2 3 7 Measuring Over Range Samples 26...

Страница 4: ...49 5 1 Description 49 5 2 Flow Cell Kits Low Pressure 50 5 2 1 Manual Flow Cell Kit Low Pressure 51 5 2 2 Automated Flow Cell Kit Low Pressure 54 5 2 3 Tips for Flow Cell Kits Low Pressure 59 5 2 4 H...

Страница 5: ...4 Using Absorbance Units Absorbance Zero Procedure 83 SECTION 10 APPLICATION SPECIFIC MEASUREMENTS 85 10 1 Application Specific Methods 85 10 2 Application Specific Calibrations 86 10 2 1 Initial ASC...

Страница 6: ...6...

Страница 7: ...ower Selection on page 13 Section 2 2 Measuring Turbidity on page 15 Section 4 1 Air Purge Connection on page 47 Section 5 2 4 High Pressure Flow Cell Kit on page 60 Section 6 2 RS232 Connection on pa...

Страница 8: ...8...

Страница 9: ...er peligrosa Revise las fichas de seguridad de materiales y familiar cese con los procedimientos de seguridad antes de manipular productos qu micos GEFAHR Das Arbeiten mit chemischen Proben Standards...

Страница 10: ...10...

Страница 11: ...RS232 output for connection to a printer data logger or computer and a recorder output 1 2 Standard Accessories Accessory items supplied with the turbidimeter include six sample cells a set of six Ge...

Страница 12: ...ment Manual 4000 NTU Formazin Standard 100 mL 7500 NTU Formazin Standard Ampule Standardization Kit containing Gelex Secondary Standards for Stray Light 0 2 0 20 0 200 200 4000 and 4 000 10 000 ranges...

Страница 13: ...ase free of materials that could obstruct air flow through the vents 1 4 3 Operating Power Selection The instrument is completely assembled when shipped from the factory except for connecting the powe...

Страница 14: ...14...

Страница 15: ...mpatibility tests prior to analysis if the sample to be monitored is in question ATTENTION Le turbidim tre de laboratoire 2100AN n est pas pr vu pour utilisation avec des liquides inflammables ou cont...

Страница 16: ...ed spread the oil uniformly Then wipe off the excess The cell should appear nearly dry with little or no visible oil Note See Section 2 3 2 on page 18 4 Install the appropriate filter module Note The...

Страница 17: ...nt for extended periods of time Leave the instrument on 24 hours a day if the instrument is used regularly Empty the cell compartment and turn off the power if the instrument is stored for extended pe...

Страница 18: ...scratches from manufacturing are effectively masked by the silicone oiling procedure outlined in Section 2 3 2 Clean the inside and outside of the cells by washing thoroughly with a nonabrasive labora...

Страница 19: ...Filtration and Degassing Kit Cat No 43975 10 or the equivalent Clean all glassware with 1 1 hydrochloric acid and rinse several times with dilution water when measuring low range turbidity samples Cap...

Страница 20: ...h the added advantage of sample pour through convenience see SECTION 5 on page 49 2 3 4 1 Indexing a Single Sample Cell Add an orientation mark to a single sample cell as follows 1 Attach the syringe...

Страница 21: ...ilter module 4 Insert the sample cell into the cell compartment and close the cell cover Record the reading 5 Lift the cell compartment cover and rotate the sample cell approximately 1 8 of a turn Clo...

Страница 22: ...the lowest reading is found Note the cell orientation record the reading and add a permanent index mark to the marking band of the cell 4 Insert the second cell into the instrument close the lid and n...

Страница 23: ...Both conditions may alter the turbidity of the sample resulting in a measurement that is not representative of the original sample turbidity 2 3 5 1 Application of Vacuum Apply vacuum with any conveni...

Страница 24: ...ic waves also may alter the characteristics of the turbidity causing particulates Turbidity is dependent on the size shape composition and refractive index of the suspended particles Excess applicatio...

Страница 25: ...ticles in the sample Signal averaging may be turned on or off at any time during measurement by pressing the SIGNAL AVG key When on the signal averaging annunciator is lighted The display is updated a...

Страница 26: ...ilable for measurement If this condition occurs the lamp symbol on the instrument display flashes to warn the user 2 3 7 1 Sample Dilution High turbidity samples may be diluted but avoid this when pos...

Страница 27: ...rument when only a small quantity of sample is available the sample to be measured is in an ampule and cannot be opened or the sample is too turbid for use with the standard sample cell A shorter ligh...

Страница 28: ...cells applies to the smaller cells including the use of silicone oil on the outside of the glass Use the Application Specific Calibration ASC ability of the instrument to provide direct reading of re...

Страница 29: ...n when the value first is assigned and subsequently is verified Gelex Secondary Turbidity Standards are stable suspensions of a metal oxide in a gel The standards are labeled with the measurement rang...

Страница 30: ...ements Note Mix by gentle inversion only DO NOT SHAKE Run water for at least five minutes before sampling from a water tap in a distribution system or treatment plant When sampling from a body of wate...

Страница 31: ...SIGNAL AVG MODE SAMPLE RATIO UNITS Exit FLOW PRINT CAL ZERO 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 Range Mode AIR PURGE RECORDER REMOTE 20 PSIG MAX WARNING FOR CONTINUED PROTECTION AGAINS...

Страница 32: ...nstrument must be recalibrated if the CAL annunciator flashes 10 RANGE Selects Auto Ranging or Manual Ranging Pressing RANGE steps the instrument through the range options 11 Manual Range Lighted annu...

Страница 33: ...other software location If power is interrupted the instrument returns to the last selected unit of measure when power is restored Press the UNITS Exit key repeatedly until the desired unit of measur...

Страница 34: ...s an immediate update If power is turned off and then restored the instrument re initializes to the Signal Averaging condition selected during the last measurement 3 1 4 Using the FLOW Key Press the F...

Страница 35: ...Formazin Refer to SECTION 10 on page 85 for detailed instructions Pressing CAL Zero at the end of a calibration sequence saves new calibration values and the instrument returns to the last used measur...

Страница 36: ...leaving original setting intact 3 2 Calibration The electronic and optical design of the 2100AN Turbidimeter provides long term stability and minimizes the need for frequent calibration The multi dete...

Страница 37: ...alized or deionized water usually is sufficient as is most filtered tap water If the purified water exceeds 0 5 NTU filter it to meet the turbidity requirements as described in Section 2 3 3 1 on page...

Страница 38: ...ric flask With a TenSette Pipet add 5 00 mL of well mixed 4000 NTU Formazin stock solution to the 100 mL flask Dilute to the mark with dilution water Stopper and mix 1000 NTU Add 50 mL of dilution wat...

Страница 39: ...Upon entering the Calibration Mode Automatic Range Signal Averaging On Ratio on and NTU units are automatically selected Upon completion of calibration all operational modes are restored to precalibra...

Страница 40: ...rd displays the expected NTU value e g 20 00 NTU and the standard number 01 is shown in the mode display Remove the sample cell from the cell holder 7 Fill a clean sample cell to the line with well mi...

Страница 41: ...o the next standard the display shows 7500 NTU and the standard number 05 is displayed Remove the sample cell from the instrument 12 Handling the 7500 NTU Formazin ampule by the top mix by gently inve...

Страница 42: ...st NTU Gelex Standard in the sample compartment Align the Gelex vial orientation mark with the sample cell compartment orientation mark This ensures the best possible repeatability Close the sample ho...

Страница 43: ...anzen enthalten aufmerksam durchzulesen damit Sie sich mit den beim Umgang mit diesen Chemikalien notwendigen Vorsichtsma nahmen Risiken und Notfallschutzma nahmen vertraut machen Es wird empfohlen in...

Страница 44: ...ested calibration points are those determined by Hach Company chemists and engineers to provide the best calibration accuracy Using Formazin standards other than those specified in Section 3 2 3 on pa...

Страница 45: ...have a difference of at least 60 NTU In addition make a blank measurement using the same dilution water used in making the Formazin dilutions and entered as the 00 calibration point Prepare standard...

Страница 46: ...46...

Страница 47: ...en the sample temperature is expected to be near or below 2 C 35 F use a desiccant dryer and particle filter to assure the dew point of the air purge is below the sample temperature The air dryer cont...

Страница 48: ...48...

Страница 49: ...s prior to use of Flow Cells if sample compatibility is questionable ATTENTION Ne pas utiliser les cuves circulation Hach avec des chantillons inflammables ou ceux contenant des hydrocarbures solvants...

Страница 50: ...eaning Sample is introduced into the top of the cell see Figure 9 A baffle deflects the incoming sample to the side wall of the cell minimizing turbulence in the light path Sample is discharged from t...

Страница 51: ...ow Cell setup is designed for low pressure use only 34 kPa 5 psig PRUDENCE La cuve circulation basse pression manuelle ou automatis e est con ue pour utilisation sous faible pression uniquement 0 34 b...

Страница 52: ...ring and install the base plate of the stand as illustrated in Figure 10 DO NOT OVERTIGHTEN THE SCREWS 3 Place the instrument right side up 4 Install the Flow Cell Inlet Reservoir on to the support ro...

Страница 53: ...tubing must discharge at a point at least 46 cm 15 below the center line of the instrument to ensure proper flow 5 2 1 4 Using the Manual Flow Cell Kit Note Assemble the Flow Cell tubing and stand Fil...

Страница 54: ...et Reservoir and Flow Valve Module inlet Note Use the tubing supplied with the kit or its equivalent Tubing lengths are approximate Avoid using excess tubing because it causes air locking and delays m...

Страница 55: ...is in use The instrument s cell cover does not close when the Flow Cell is installed Manual flow through the Flow Cell is controlled by using the valve control switch on the Flow Valve Module The val...

Страница 56: ...once per second and the display is updated Measurement time is programmable from 0 to 99 minutes and 99 seconds The last displayed value is held in the display and the results of measurement are auto...

Страница 57: ...nd the turbidimeter completes sample measurements for the programmed measurement time 7 The result of the measurement is locked in the display and transmitted to the built in printer and or through th...

Страница 58: ...has been programmed previously Press ENTER to accept the displayed setting Or use the right arrow key to select the digit to edit then the up or down arrow keys to edit the fill time Press ENTER to ac...

Страница 59: ...me purges the system approximately four times A shorter fill time may be appropriate when making repeated measurements of the same sample If bubbles tend to collect in the Flow Cell gently tap the cel...

Страница 60: ...compression fittings suitable for 1 4 O D polyethylene metal glass or clear vinyl tubing Clear vinyl tubing requires an internal tube support Step 4 of Figure 13 describes the method for removing tub...

Страница 61: ...ide because it may introduce bubbles into the sample causing positive interference in the turbidity reading This hookup also maintains sufficient pressure to minimize outgassing in a carbonated stream...

Страница 62: ...ry to the operator and damage to the instrument In the event of leakage or breakage immediately depressurize the system and disconnect power ADVERTENCIA Use solamente c lulas de vidrio que est n clasi...

Страница 63: ...werden Die Einheit darf nicht an der Glask vette festgehalten werden Zwischen K vette und Benutzer sollte ein Schutzschild aufgestellt werden 4 Insert the Flow Cell into the instrument cell holder No...

Страница 64: ...64...

Страница 65: ...hone Plug 6 1 1 Setting Recorder Minimum Value This function is used to set the minimum value of the recorder output for the current units the selected measurement mode 1 Enter the setup mode by press...

Страница 66: ...The mode display flashes 2 Select the number 16 using the edit keys Press ENTER The display will show UP DN RTN 3 Press the up arrow key to increase the minimum output in a positive direction Press t...

Страница 67: ...ignal Ground 6 DSR Pin 6 is an optional printer handshake line Do not connect when using a computer Data Set Ready SHELL FG Frame Ground All other pins are not connected AIR PURGE RECORDER REMOTE 20 P...

Страница 68: ...length flashes in the large display 5 Use the up or down keys to select the desired character length 6 To store press ENTER 7 Press SETUP to exit the setup mode C Stop Bit Select 1 Press SETUP the sm...

Страница 69: ...99 Using a serial to parallel converter the data string transmitted from the 2100AN Turbidimeter prints on any Epson compatible parallel printer that is used with IBM compatible applications Data is...

Страница 70: ...paper Cat No 47090 00 Use of other thermal paper may result in marginal print quality and reduced print head life The following steps describe installation of a new roll of thermal printer paper into...

Страница 71: ...flash 2 Select the number 02 using the edit keys Press the ENTER key to go into the printer setup mode 3 Toggle through the INT the built in printer EXT the RS232 connection or BOTH printer outputs us...

Страница 72: ...to accept the new contrast setting 4 Press SETUP to exit the setup mode Pressing the UNITS EXIT key at any time prior to accepting the new output setting exits the contrast setup mode and leaves the o...

Страница 73: ...rrent recorder trim minimum value programmed into the 2100AN Key in RTN XXXXX to set a new recorder trim minimum value Press enter on the computer keyboard to accept the new recorder trim minimum valu...

Страница 74: ...74...

Страница 75: ...tact 7 3 Setting the Month and Day 1 Enter the setup mode by pressing SETUP The mode display will flash 2 Select the number 06 using the edit keys followed by ENTER Set the month and day MM DD using t...

Страница 76: ...76...

Страница 77: ...tubes The adapters come with a tall light shield supplied for test tubes taller than the standard cover Carefully select sample cell glassware used with the adapters to be clean and free of significan...

Страница 78: ...78...

Страница 79: ...ISO 7027 for turbidity measurement An empty filter holder assembly Cat No 30398 00 can be purchased for assembly of a custom filter The filter holder assembly accommodates a filter 25 4 mm 1 inch in...

Страница 80: ...ing one of the optional cell adapters and a smaller sample cell if a low light indication occurs Many low light conditions encountered in developing applications at alternate wavelengths can be resolv...

Страница 81: ...asurement is 30 minutes Typical application is to leave the instrument on 24 hours a day 2 Press the UNITS EXIT key until the units display reads CU Press the CAL ZERO key The display reads ZERO CU No...

Страница 82: ...standard into the Inlet Reservoir Note Always slowly pour sample down the inside edge of the reservoir to minimize entrapment of air bubbles in the sample 8 Press ENTER The display reads 30 seconds an...

Страница 83: ...by the following procedure 1 Select transmittance by pressing the UNITS EXIT key until the units display shows T 2 Press the CAL ZERO key to select 100 T 3 The main display flashes 100 and the mode d...

Страница 84: ...84...

Страница 85: ...r can be used for application specific measurements when predefined units or standard sample cells are not appropriate Two user defined units of measure ASC 1 and 2 let the user define the unit of mea...

Страница 86: ...Cell Adapter when needed and Filter Assembly see Section 8 1 on page 77 Section 9 1 on page 79 and Section 9 1 2 on page 80 Prepare a series of standards for the desired ASC unit Select and install an...

Страница 87: ...name cannot be one of the predefined units NTU EBC NEP T A CU 1 or 2 Press ENTER to accept the units name Note The ASC calibration name can not be one of the predefined units NTU EBC NEP T A CU 1 or...

Страница 88: ...n in the large LED display The blank spaces in front of the NTU units NTU indicate no value is assigned to point 4 15 Press the right arrow key to initiate editing of point 4 The large LED display sho...

Страница 89: ...UNITS EXIT until the desired ASC unit name appears Press CAL ZERO to select the ASC calibration mode The large display flashes EDIT Press ENTER to initiate editing The left digit of the unit descripti...

Страница 90: ...ft digit flashes Use the up and down arrow keys until an X appears in the display Press ENTER to delete the point 4 The mode display flashes 03 to indicate that point 3 is displayed The large LED disp...

Страница 91: ...en forma de alertas notas y precauciones a tomar Lea y siga cuidadosamente estas instrucciones a fin de evitar accidentes personales y da os al instrumento Las tareas de instalaci n y mantenimiento d...

Страница 92: ...92...

Страница 93: ...AN e desligue a corrente el ctrica antes de limpar o instrumento 11 2 Lamp Replacement Use only the Lamp Replacement Kit Cat No 47089 00 The lamp assembly includes the lamp with leads the lamp retaine...

Страница 94: ...from skin will cause damage Clean the lamp with alcohol if necessary 5 Secure the new lamp assembly in place using the two Phillips screws do not over tighten 6 Insert one stripped lamp lead under eac...

Страница 95: ...h Dilution may be necessary ERR04 Memory malfunction Switch instrument off and back on with I O Call Hach service ERR05 A D over range Be sure cover is closed and appropriate Filter Module is installe...

Страница 96: ...RS232 Character Length Select 12 1 SB RS232 Stop Bit Select 13 NONE PAR RS232 Parity Select 14 XXXXXRMN Setting Recorder Minimum value 15 XXXXXRMX Setting Recorder Maximum value 16 XXXXXRTN Setting R...

Страница 97: ...Medium Millivolts Gain 1000 52 XXXXXVH0 A D Reference High Millivolts Gain 1 53 XXXXXVH1 A D Reference High Millivolts Gain 10 54 XXXXXVH2 A D Reference High Millivolts Gain 100 55 XXXXXVH3 A D Refer...

Страница 98: ...Section 3 2 on page 36 12 3 2 3 Flashing 9s If the display flashes all 9s the sample being measured is overrange for the selected range of measurement If the display flashes 9s when the instrument is...

Страница 99: ...88 Lamp Kit Replacement 47089 00 Oiling Cloth 47076 00 Power Cord 18 3 SVT 10 A 125 V North American 115 Vac UL CSA approved Power Cord 18010 00 OR Power Cord 75 mm SQX3 conductor European 230 Vac VD...

Страница 100: ...hylenetetramine 100 g 1878 26 Hexamethylenetetramine 500 g 1878 34 Hydrazine Sulfate 100 g 742 26 Power Supply Flow Valve Module 12 Vdc 110 Vac included with Automated Flow Cell Kit 47469 00 Power Sup...

Страница 101: ...At Hach Company customer service is an important part of every product we make With that in mind we have compiled the following information for your convenience 101 GENERAL INFORMATION...

Страница 102: ...102...

Страница 103: ...103 HOW TO ORDER...

Страница 104: ...nada only Telephone 204 632 5598 FAX 204 694 5134 E mail canada hach com In Latin America the Caribbean the Far East the Indian Subcontinent Africa Europe or the Middle East Hach Company World Headqua...

Страница 105: ...PRESS WRITTEN WARRANTY GIVEN BY HACH TO THE BUYER EXCEPT AS EXPRESSLY SET FORTH IN THE PRECEDING SENTENCE HACH MAKES NO WARRANTY OF ANY KIND WHATSOEVER WITH RESPECT TO ANY PRODUCTS HACH EXPRESSLY DISC...

Страница 106: ...106...

Страница 107: ...107...

Страница 108: ...389 Telephone 970 669 3050 FAX 970 669 2932 FOR TECHNICAL ASSISTANCE PRICE INFORMATION AND ORDERING Call 800 227 4224 Contact the HACH office or distributor serving you www hach com techhelp hach com...

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