Hach POCKET COLORIMETER II Instruction Manual
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Hach POCKET COLORIMETER II Instruction Manual

Analysis systems
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59570-88
POCKET COLORIMETER™ II
ANALYSIS SYSTEMS
INSTRUCTION MANUAL
Chlorine (Cl
)
2
© Hach Company, 2006. All rights reserved. Printed in the U.S.A.
te/dk 09/06 3ed

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  • Page 1 59570-88 POCKET COLORIMETER™ II ANALYSIS SYSTEMS INSTRUCTION MANUAL Chlorine (Cl © Hach Company, 2006. All rights reserved. Printed in the U.S.A. te/dk 09/06 3ed...
  • Page 2 Important Note This manual is intended for use with the following Pocket Colorimeter™ II instrument: Chlorine (Cl Cat. No. 59530-00 1—2...

  • Page 3: Table Of Contents

    Table of Contents Safety Precautions ....................1—7 Laboratory Safety ....................1—7 Use of Hazard Information................1—7 Precautionary Labels..................1—8 Specifications ......................1—9 Instrument Keys and Display ................1—11 Instrument Cap Cord ..................1—12 Chlorine, Free and Total, LR ................1—15 Measuring Hints ....................1—15 Accuracy Check ....................
  • Page 4 Table of Contents, continued Method Performance ..................1—42 √ Spec ™ Secondary Standards for DPD Chlorine ........1—43 √ Using the Spec Standards................1—44 Summary of Method ..................1—45 Replacement Parts ....................1—46 Instrument Operation ..................2—3 Key Functions......................2—3 Menu Selections ....................2—4 Switching Ranges....................2—4 Setting the Time ....................2—4 Recalling Stored Measurements ................2—5 Battery Installation .....................2—6 Error Codes...
  • Page 5 Table of Contents, continued Standard Calibration Adjust ................2—13 User-Entered Calibration ................2—15 Overview......................2—15 Calibration Procedure Using Prepared Standards ........2—17 Entering a Predetermined Calibration Curve ..........2—20 Editing a User-entered or Factory Calibration Curve ........2—22 Exiting the Calibration Routine..............2—24 Deleting Calibration Points ................
  • Page 6 1—6...

  • Page 7: Safety Precautions

    Safety Precautions Please read this entire manual before unpacking, setting up, or operating this instrument. Pay particular attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment. To ensure the protection provided by this equipment is not impaired, do not use or install this equipment in any manner other than that which is specified in this manual.

  • Page 8: Precautionary Labels

    Safety Precautions, continued DANGER Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious injury. CAUTION Indicates a potentially hazardous situation that may result in minor or moderate injury. NOTE Information that requires special emphasis. Precautionary Labels Please pay particular attention to labels and tags attached to the instrument.

  • Page 9: Specifications

    Specifications Lamp: Light emitting diode (LED) Detector: Silicon photodiode Photometric precision: ± 0.0015 Abs Filter bandwidth: 15 nm Wavelength: 528 nm Absorbance range: 0–2.5 Abs Dimensions: 3.2 x 6.1 x 15.2 cm (1.25 x 2.4 x 6 inches) Weight: 0.2 kg (0.43 lbs) Sample cells: 1 cm (10 mL), 25 mm (10 mL) Operating conditions: 0 to 50 °C (32 to 122 °F);...
  • Page 10 OPERATION DANGER Handling chemical samples, standards, and reagents can be dangerous. Review the necessary Material Safety Data Sheets and become familiar with all safety procedures before handling any chemicals. DANGER La manipulation des échantillons chimiques, étalons et réactifs peut être dangereuse. Lire les Fiches de Données de Sécurité...

  • Page 11: Instrument Keys And Display

    Instrument Keys and Display Item Description POWER/BACKLIGHT ZERO/SCROLL MENU Numeric Display Range Indicator Range Indicator Menu Indicator Calibration Adjusted Indicator Battery Low Indicator READ/ENTER 1—11...

  • Page 12: Instrument Cap Cord

    Instrument Cap Cord The instrument cap for the Pocket Colorimeter™ II doubles as a light shield. Accurate measurements cannot be obtained unless the sample or blank is covered with the cap. Use the instrument cap cord to secure the cap to the body of the colorimeter and prevent loss of the cap.
  • Page 13 Instrument Cap Cord, continued Figure 1 Attaching the Instrument Cap Cord 1—13...
  • Page 14 1—14...

  • Page 15: Chlorine, Free And Total, Lr

    For best results, dedicate a set of cells to each free chlorine and total chlorine test. Note: The Pocket Colorimeter II is designed to measure solutions contained in sample cells. dip the meter in the sample or pour the sample directly into the cell holder.
  • Page 16 Chlorine, Free and Total, LR, continued Using Powder Pillows (USEPA accepted for reporting) Fill a 10-mL cell with Press the key to Remove the meter cap. POWER sample (the blank). Cap. turn the meter on. Place the blank in the cell The arrow should indicate holder with the diamond Samples must be...
  • Page 17 Chlorine, Free and Total, LR, continued Press Fill a second 10-mL cell Add the contents of one ZERO/SCROLL to the 10-mL line with DPD Free Chlorine Powder The display will show sample. Pillow or one DPD Total “- - - -” then “0.00”. Chlorine Powder Pillow to Do not use the same Note:...
  • Page 18 Chlorine, Free and Total, LR, continued Cap and shake gently for For free chlorine, place For total chlorine, place 20 seconds. the prepared sample cell in the prepared sample in the the cell holder. Cover with cell holder and cover the cell Shaking dissipates Note: the instrument cap and...
  • Page 19 Chlorine, Free and Total, LR, continued If the sample temporarily turns yellow after reagent Press Note: READ/ENTER The instrument will show addition, or if the display shows overrange (page 2—12) dilute a fresh sample and repeat the test. A slight loss of chlorine “- - - -”...
  • Page 20 Chlorine, Free and Total, LR, continued ® Using AccuVac Ampuls (USEPA accepted for reporting) Fill a 10-mL sample cell Press the key to Remove the instrument POWER with sample (the blank). turn on the meter. cap. Place the blank in the Cap.
  • Page 21 Chlorine, Free and Total, LR, continued Press Fill a DPD Free Chlorine Quickly invert the ampule ZERO/SCROLL The display will show Reagent AccuVac® Ampul or several times to mix. Wipe “- - - -” then “0.00”. a DPD Total Chlorine off any liquid or fingerprints.
  • Page 22 Chlorine, Free and Total, LR, continued For free chlorine, place For total chlorine, insert Press . The READ/ENTER the prepared sample in the the ampule into the cell instrument will show cell holder. Cover the ampule holder, then cover with the - - - - followed by the results with the instrument cap and instrument cap.
  • Page 23 Chlorine, Free and Total, LR, continued Using the SwifTest™ Dispenser (USEPA accepted for reporting) Fill a 10-mL cell with Press the key to Remove the meter cap. POWER sample (the blank). Cap. turn the meter on. Place the blank in the cell The arrow should indicate holder with the diamond Samples must be...
  • Page 24 Chlorine, Free and Total, LR, continued Press Fill a second 10-mL cell Use the SwifTest™ ZERO/SCROLL to the 10-mL line with Dispenser to add one The display will show sample. dispensation of DPD Free “- - - -” then “0.00”. Chlorine reagent or one Do not use the same Note:...
  • Page 25 Chlorine, Free and Total, LR, continued Cap and shake gently for For free chlorine, place For total chlorine, 20 seconds. the prepared sample cell in place the prepared sample the cell holder and cover in the cell holder and cover Shaking dissipates Note: with the instrument cap.
  • Page 26 Chlorine, Free and Total, LR, continued If the sample temporarily turns yellow after reagent Press Note: READ/ENTER The instrument will show - - addition, or if the display shows overrange (page 2—12) dilute a fresh sample and repeat the test. A slight loss of chlorine - - followed by the results in mg/L chlorine.

  • Page 27: Accuracy Check

    Chlorine, Free and Total, LR, continued Accuracy Check Standard Additions Method 1. Use the ampule breaker to snap the neck off a low range Chlorine Standard Solution Ampule, 20–30 mg/L Cl 2. Use a TenSette® pipet to add 0.1, 0.2, and 0.3 mL of standard to three 10-mL samples.
  • Page 28 A user calibration or a user-prepared chlorine standard may be required by a regulatory official or agency. Two options are available on the Pocket Colorimeter II to meet this requirement. A chlorine standard may be prepared and used to validate the calibration curve using the Standard Calibration Adjust feature (see page 2—13...

  • Page 29: Interferences

    Chlorine, Free and Total, LR, continued Interferences Interfering Substance Interference Levels and Treatments Acidity Greater than 150 mg/L CaCO . May not develop full color or color may fade instantly. Neutralize to pH 6–7 with 1 N Sodium Hydroxide. Determine amount to be added on a separate 10-mL sample, then add the same amount to the sample being tested.

  • Page 30: Method Performance

    Chlorine, Free and Total, LR, continued Interfering Substance Interference Levels and Treatments Manganese, Oxidized 1. Adjust sample pH to 6–7. , Mn ) or Chromium, 2. Add 3 drops Potassium Iodide (30-g/L) (Cat. No. 343-32) to a 10-mL sample. Oxidized (Cr 3.

  • Page 31: Chlorine, Free And Total, Hr

    Chlorine, Free and Total, HR (0.1 to 8.0 mg/L Cl For water, treated water, estuary water, and seawater (Free Chlorine) For water, treated waters, wastewater, estuary water, and seawater (Total Chlorine) DPD Method* USEPA accepted for reporting drinking water analyses (free and total chlorine) and wastewater analyses (total chlorine).
  • Page 32 High range free chlorine determinations are subject to variable levels of interferences from monochloramine. See Interferences on page 1—41. Note: The Pocket Colorimeter II is designed to measure solutions contained in sample cells. dip the meter in the sample or pour the sample directly into the cell holder. DO NOT...
  • Page 33 Chlorine, Free and Total, HR, continued Using Powder Pillows Fill a 1-cm/10-mL cell Press the key to Remove the meter cap. POWER with sample (the blank). Cap. turn the meter on. Place the blank into the cell holder, with the The arrow should indicate the Samples must be Note:...
  • Page 34 Chlorine, Free and Total, HR, continued Press: Fill another 1-cm/10-mL Add the contents of two ZERO/SCROLL sample cell to the 5-mL line DPD Free Chlorine or two The display will show with sample. Cap. DPD Total Chlorine Powder “- - - -” followed by “0.0”. Pillows to the sample cell Do not use the same Note:...
  • Page 35 Chlorine, Free and Total, HR, continued For free chlorine, place the For total chlorine, place the Press READ/ENTER prepared sample cell in the cell prepared sample in the cell The instrument will holder and cover with the holder and cover with the show “- - - -”...
  • Page 36 Chlorine, Free and Total, HR, continued Using the SwifTest™ Dispenser Fill a 1-cm/10-mL cell Press the key to Remove the meter cap. POWER with sample (the blank). Cap. turn the meter on. Place the blank into the cell holder, with the diamond The arrow should indicate the Samples must be Note:...
  • Page 37 Chlorine, Free and Total, HR, continued Press: Fill another 1-cm/10-mL Use the SwifTest™ ZERO/SCROLL sample cell to the 5-mL line Dispenser to add two The display will show with sample. Cap. dispensations of DPD Free “- - - -” followed by “0.0”. Chlorine reagent or DPD Do not use the same Note:...
  • Page 38 Chlorine, Free and Total, HR, continued For free chlorine, place the For total chlorine, place the Press READ/ENTER prepared sample cell in the cell prepared sample in the cell The instrument will show holder and cover with the holder and cover with the “- - - -”...

  • Page 39: Accuracy Check

    Chlorine, Free and Total, HR, continued Accuracy Check Standard Additions Method a. Use the ampule breaker to snap the neck off a high range Chlorine Standard Solution Ampule, 50–70 mg/L Cl ® b. Use a TenSette pipet to add 0.1, 0.2, and 0.3 mL of standard to three 5-mL samples.
  • Page 40 Chlorine, Free and Total, HR, continued A user calibration or a user-prepared chlorine standard may be required by a regulatory official or agency. Two options are available on the Pocket Colorimeter™ II to meet this requirement. A chlorine standard may be prepared and used to validate the calibration curve using the Standard Calibration Adjust feature (see page 2—13 for more...

  • Page 41: Interferences

    Chlorine, Free and Total, HR, continued Interferences Interfering Substance Interference Levels and Treatments Monochloramine For conventional free chlorine disinfection (beyond the breakpoint), monochloramine concentrations are very low. If monochloramine is present in the sample, its interference in the free chlorine test varies with the temperature, the relative amount of monochloramine to free ammonia, and the time required to do the analysis.

  • Page 42: Method Performance

    Chlorine, Free and Total, HR, continued Method Performance Estimated Detection Limit (EDL) = 0.1 mg/L Typical precision (95% confidence interval) = 5.0 ± 0.2 mg/L 1—42...

  • Page 43: Spec ™ Secondary Standards For Dpd Chlorine

    Due to improvements in the optical system of the Pocket Colorimeter™ II, the tolerance ranges and values on the Certificate of Analysis of previously purchased Spec √ standards may no longer be valid. Obtain a new set of standards, or use the Pocket Colorimeter II to assign new values to existing standards.

  • Page 44: Using The Spec Standards

    Spec√™ Secondary Standards for DPD Chlorine, continued Using the Spec√ Standards 1. Place the colorless Spec√ blank into the cell holder with the alignment mark facing the keypad. Tightly cover the cell with the instrument cap. 2. Press . The display will show “0.00”. ZERO 3.

  • Page 45: Summary Of Method

    Summary of Method Chlorine can be present in water as free chlorine and as combined chlorine. Both forms can coexist in the same solution and can be determined together as total chlorine. Free chlorine is present as hypochlorous acid or hypochlorite ion. Combined chlorine represents a combination of chlorine-containing compunds including but not limited to monochloramine, dichloramine, nitrogen trichloride, –...

  • Page 46: Replacement Parts

    Replacement Parts REQUIRED REAGENTS Description Unit Cat. No. Free Chlorine Tests DPD Free Chlorine Reagent Powder Pillows ......100/pkg ..21055-69 ® DPD Free Chlorine Reagent AccuVac Ampuls (low range test only) ..............25/pkg ..25020-25 SwifTest™ DPD Free Chlorine Reagent with dispenser ..250* tests ..28023-00 Total Chlorine Tests DPD Total Chlorine Reagent Powder Pillows......100/pkg ..21056-69 ®...
  • Page 47 Replacement Parts, continued OPTIONAL REAGENTS Description Unit Cat. No. Chlorine Standard Solution, 25–30 mg/L, 2-mL ......20/pkg ..26300-20 Chlorine Standard Solution, 50–75 mg/L, 2-mL ......20/pkg ..14268-20 √ Chlorine Standards, secondary, Spec ™, 0.0, 0.2, 0.8 and 1.5 mg/L ............4/pkg ..26353-00 Empty AccuVac®...
  • Page 48 Replacement Parts, continued OPTIONAL APPARATUS Description Unit Cat. No. ® AccuVac Snapper Kit.................each ..24052-00 Ampule Breaker Kit ................each ..24846-00 Batteries, AAA, alkaline ..............4/pkg ..46743-00 Caps for 10-mL sample cells ............12/pkg ..24018-12 Cylinder, graduated, 25 mL. glass .............each ..508-40 Cylinder, graduated, 100 mL, glass ...........each ..
  • Page 49 Section 2 Instrument Manual 2—1...
  • Page 50 2—2...

  • Page 51: Instrument Operation

    Instrument Operation Key Functions Description Function On/Off/Backlight POWER To turn on the backlight, turn on the instrument, then press and hold the power key until the backlight turns on. Press and hold again to turn off the backlight. This key functions the same in all instrument modes and ranges.

  • Page 52: Menu Selections

    Instrument Operation, continued Description Function Enter/Exit the menu mode MENU Press and hold for approximately 5 seconds to enter user-entered method mode. Menu Selections Press the key to access the menu selections. MENU Switching Ranges 1. Press the key. The display will show “SEL”. A flashing arrow indicates MENU the current range.

  • Page 53: Recalling Stored Measurements

    Instrument Operation, continued 2. Press . The digit to be edited will flash. READ/ENTER 3. Use the key to change the entry, then press ZERO/SCROLL READ/ENTER accept and advance to the next digit. The time is entered in 24-hour format. Recalling Stored Measurements 1.

  • Page 54: Battery Installation

    Instrument Operation, continued Battery Installation Figure 1 on page 2—7 provides an exploded view of battery installation. 1. Unhook the latch and remove the battery compartment cover. The polarities are shown on the battery holder. 2. Place the four batteries provided with the instrument in the holder as indicated and replace the battery compartment cover.
  • Page 55 Instrument Operation, continued Figure 1 Battery Installation 2—7...
  • Page 56 2—8...

  • Page 57: Error Codes

    Error Codes When the instrument cannot perform the function initiated by the operator, an error message will appear in the display. Refer to the appropriate message information below to determine what the problem is and how it can be corrected. Resolve error messages in the order that they appear on the display.
  • Page 58 Error Codes, continued 3. E-2 LED Error The LED (light source) is out of regulation. • Replace batteries. • Verify LED lights up (inside the cell holder) when the READ/ENTER key is pressed. ZERO/SCROLL • If the problem persists, contact a Service Center (page 2—37).
  • Page 59 Error Codes, continued • If the problem persists, contact a Service Center (page 2—37). 5. E-6 Abs Error (User mode) Indicates that the absorbance value is invalid, or indicates an attempt to make a curve with less than two points. •...
  • Page 60 Error Codes, continued 8. Underrange—flashing number below stated test range • Verify instrument cap is correctly seated. • Check zero by measuring a blank. If error recurs, re-zero the instrument. • If the problem persists, contact a Service Center (page 2—37).

  • Page 61: Standard Calibration Adjust

    Standard Calibration Adjust The Pocket Colorimeter™ II instrument is factory-calibrated and ready for use without user calibration. Use of the factory calibration is recommended unless the user is required to generate a calibration. The Standard Calibration Adjust can be used to meet regulatory requirements. This feature allows the factory default calibration curve to be adjusted with a known standard.
  • Page 62 Standard Calibration Adjust, continued 7. Press to access the Edit function, then press ZERO/SCROLL READ/ENTER begin editing. The digit to be edited will flash. Use the key to ZERO/SCROLL change the entry, then press to accept and advance to the READ/ENTER next digit.

  • Page 63: User-Entered Calibration

    User-Entered Calibration Overview The Pocket Colorimeter™ II will accept a user-prepared calibration curve. The curve can extend from 0 to 2.5 absorbance. A user-prepared calibration curve may be entered into any channel that does not contain a factory-programmed curve. These channels are labeled “abs”...
  • Page 64 User-Entered Calibration, continued • CAL—Used to enter and edit standard values and measure absorbance values, or review the existing calibration. • Edit—Used to enter and edit standard values and absorbance values with the keypad or review the existing calibration. Used to enter a predetermined calibration curve.

  • Page 65: Calibration Procedure Using Prepared Standards

    User-Entered Calibration, continued • Once in the CAL or Edit option, press the key to navigate through READ/ENTER each option. Note: Press to quickly scroll through each option. ZERO/SCROLL Calibration Procedure Using Prepared Standards Note: Deionized water or a reagent blank can be used to zero during the calibration procedure. Calibrations generated with deionized water as the zero will give less accurate results if the reagent blank is significantly more turbid or colored than deionized water.
  • Page 66 User-Entered Calibration, continued 3. Insert the reagent blank or deionized water into the meter and cover with the cap. Press the key. The meter will display “- - - -”, followed by ZERO/SCROLL “0.000”. This initializes (zeroes) the meter. 4. Press the key and hold it down until the display shows “USER”, followed MENU by “CAL”.
  • Page 67 User-Entered Calibration, continued 9. Insert the reagent blank or deionized water into the cell holder. Cover the blank with the instrument cap. 10. Press the key. The meter will measure and display the absorbance READ/ENTER value for “S0”. 11. Remove the sample blank. Press the key.

  • Page 68: Entering A Predetermined Calibration Curve

    User-Entered Calibration, continued 16. Press the key twice to exit and accept the changes. The instrument will MENU use this calibration to determine the displayed concentration of future sample measurements. Entering a Predetermined Calibration Curve Note: Entering a predetermined calibration curve requires at least two data pairs. Each data pair requires a concentration value and the absorbance value for the given concentration.
  • Page 69 User-Entered Calibration, continued 4. Enter the concentration value and absorbance value of the first data pair (S0, A0). 5. To enter the S0 value, press . Use the key to select READ/ENTER ZERO/SCROLL the numerical value, then press the key to accept the entry and READ/ENTER advance to the next decimal place.

  • Page 70: Editing A User-Entered Or Factory Calibration Curve

    User-Entered Calibration, continued 10. When all the calibration data has been entered, press twice to return to MENU the measurement mode. Editing a User-entered or Factory Calibration Curve 1. Press the key and hold it down until the display shows “USER”, followed MENU by “CAL”.
  • Page 71 User-Entered Calibration, continued 5. To edit the S0 value, press . Use the key to select the READ/ENTER ZERO/SCROLL numerical value, then press the key to accept the entry and READ/ENTER advance to the next decimal place. Repeat this sequence until the S0 concentration value is entered.

  • Page 72: Exiting The Calibration Routine

    User-Entered Calibration, continued Note: When a factory calibration curve has been edited, the “calibration adjust” icon will appear in the display. Exiting the Calibration Routine Exit the calibration routine by pressing the key to return to measurement MENU mode. The instrument uses the last completed user-entered calibration or the factory calibration if no user-entered calibration has been completed.

  • Page 73: Retrieving The Factory Calibration

    User-Entered Calibration, continued 5. Press to delete. Repeat for all points to be deleted. READ/ENTER Note: The minimum number of valid points is two. For example, if five points have been entered, three can be deleted using this feature. 6. Press to return to the measurement mode.

  • Page 74: Maximum/Minimum Displayed Value

    User-Entered Calibration, continued Maximum/Minimum Displayed Value In meters with absorbance (Abs) ranges, the maximum displayed value and minimum displayed value is related to the value of the standards entered in a user calibration. Measurements that exceed the minimum or maximum standards entered in the user calibration will return a flashing number indicating “underrange”...
  • Page 75 Example 2 For a calibration with the following standards: S0=1.00 S1=2.00 S2=4.00 Maximum Displayed Value 4.00 Minimum Displayed Value 1.00 For Hach-calibrated programs, the maximum and minimum displayed values always equal the factory-calibrated values and cannot be changed. 2—27...

  • Page 76: Certification

    Certification Hach Company certifies this instrument was tested thoroughly, inspected, and found to meet its published specifications when it was shipped from the factory. The Pocket Colorimeter™ II instrument has been tested and is certified as indicated to the following instrumentation standards:...
  • Page 77 Interference-causing Equipment Regulations. Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada. FCC Part 15, Class “A” Limits: Supporting test records from Hach EMC Test Facility, certified compliance by Hach Company. 2—29...
  • Page 78 Certification, continued This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.
  • Page 79 Certification, continued 1. Remove power from the Pocket Colorimeter instrument by removing one of its batteries to verify that it is or is not the source of the interference. 2. Move the Pocket Colorimeter instrument away from the device receiving the interference.
  • Page 80 2—32...

  • Page 81: General Information

    GENERAL INFORMATION 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. 2—33...
  • Page 82 2—34...

  • Page 83: How To Order

    (800) 227-HACH (800-227-4224) Loveland, Colorado 80539-0389 U.S.A. By FAX: For order information by E-mail: (970) 669-2932 (Hach Loveland) orders@www.hach.com Information Required: • • Hach account number (if available) Purchase order number • • Billing address Catalog number • • Shipping address Brief description or model number •...
  • Page 84 Call 1-800-227-4224 or E-mail techhelp@hach.com. International Customers Hach maintains a worldwide network of dealers and distributors. To locate the representative nearest you, send E-mail to intl@hach. com or call (970) 669-3050. In Canada Hach Instrument Service Centre, Winnipeg, Manitoba, Canada Telephone: (204) 632-5598;...

  • Page 85: Repair Service

    Repair Service Authorization must be obtained from Hach Company before sending any items for repair. Please contact the Hach Service Center serving your location. In the United States: Canada: Hach Company Hach Sales & Service Canada Ltd. 100 Dayton Avenue...

  • Page 86: Warranty

    In the event that a defect is discovered during the warranty period, Hach Company agrees that, at its option, it will repair or replace the defective product or refund the purchase price, excluding original shipping and handling charges.
  • Page 87 Hach Company • any product not used in accordance with the instructions furnished by Hach Company • freight charges to return merchandise to Hach Company • freight charges on expedited or express shipment of warranted parts or product • travel fees associated with on-site warranty repair...
  • Page 88 On the basis of strict liability or under any other legal theory, in no event shall Hach Company be liable for any incidental or consequential damages of any kind for breach of warranty or negligence.

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