Hach Sension 156 Manual
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Hach Sension 156 Manual

Portable multiparameter meter
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Cat. No. 54650-18
Portable Multiparameter
Meter Manual
© Hach Company, 2000, 2001. All rights reserved. Printed in the U.S.A.
te/dk 5/01 2ed

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Summary of Contents for Hach Sension 156

  • Page 1 Cat. No. 54650-18 Portable Multiparameter Meter Manual © Hach Company, 2000, 2001. All rights reserved. Printed in the U.S.A. te/dk 5/01 2ed...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SAFETY PRECAUTIONS ....................... 7 SPECIFICATIONS........................9 OPERATION ........................13 SECTION 1 INTRODUCTION ..................15 1.1 Unpacking the Instrument ....................15 1.1.1 Standard Accessories ....................15 1.1.2 Optional Accessories ....................16 1.2 Keypad Description ......................16 1.3 Screen Description and Layout ..................18 1.4 Maintenance ........................
  • Page 4 TABLE OF CONTENTS, continued SECTION 4 CONDUCTIVITY OPERATION MODE ..........35 4.1 Conductivity Setup Menu Options ................... 35 4.2 How to Change the Conductivity Menu Options.............. 38 4.3 Conductivity Calibration....................39 4.3.1 Calibrating with a Known NaCl Standard............... 40 4.3.2 Calibrating with a Known KCl Standard ..............41 4.3.3 Calibrating by Adjusting the Cell Constant ............
  • Page 5 TABLE OF CONTENTS, continued SECTION 6 STORING AND RECALLING DATA ..........69 6.1 Storing Measurements....................... 69 6.2 Recalling Stored Data......................70 6.2.1 pH Data........................71 6.2.2 Conductivity Data ....................71 6.2.3 Dissolved Oxygen Data ................... 72 6.3 Erasing Data ........................72 6.3.1 Erasing Single Data Points ..................

  • Page 7: Safety Precautions

    SAFETY PRECAUTIONS Section 2.2 Power Connection Section 2.3 Probe Connections Section 2.6 Printer and Computer Connections Section 7.1 Connecting to Printers/Computers...

  • Page 9: Specifications

    General Specifications Display: Custom LCD Inputs: (1) 5-pin Hach pH/mV/temperature probe connector (1) 5-pin Hach conductivity or dissolved oxygen probe connector Outputs: RS232 via Docking Station Power requirements: Meter: 4 AA alkaline batteries or via Docking Station Docking Station: 6–12 V dc; use either Hach-supplied 115 or 230 V, 50/60 Hz external power supply or a customer-provided supply with 50 mA output, 5.5-mm power...
  • Page 10 SPECIFICATIONS, continued pH Mode Range:-2.00–19.99 Resolution (selectable): 0.001/0.01/0.1 Slope (meter allowable): 48–65 mV/decade Instrument Drift: <40 µV/°C Input Bias Current: -1 pico amp ≤ input bias ≤ 1 pico amp at 25 °C; ±4 picoamp over full range Millivolt Mode Range: -2000–2000 mV Resolution: 0.1 mV Accuracy (meter only): ±0.2 mV or ±0.15% of the reading,...
  • Page 11 SPECIFICATIONS, continued Resolution: TDS: 0.00–199.9 mg/L 0.1 mg/L 200–1999 mg/L 1 mg/L 2.00–19.99 g/L 0.01 g/L 20.0–50 g/L 0.1 g/L Salinity: 0.1 ppt (‰) Temperature ±0.1 °C Accuracy: Conductivity: ±0.5% of range TDS: ±0.5% of full scale Salinity: ±0.1 ppt (-2 to 35°C) Temperature: ±0.3 °C from 0–70 °C;...

  • Page 13: Operation

    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 15: Section 1 Introduction

    Verify that all items listed on the packing slip are included. If any items are missing or damaged, contact Hach Customer Service, Loveland, Colorado at 1-800-227-4224. Customers outside the United States should contact their regional Hach office or distributor.

  • Page 16: Optional Accessories

    SECTION 1, continued 1.1.2 Optional Accessories • Docking Station • Stirring Stand • BOD Accessory Kit (See Section 5.6 on page 60.) • Low Ionic Strength Sample Chamber • Probe-related accessories (covered in the electrode manual) • Carrying case 1.2 Keypad Description Figure 1 shows the keypad.
  • Page 17 SECTION 1, continued Table 1 Keys and Description Description Exit/Power On-Off When power is off: • Turns the instrument on and opens the most recently used reading mode. In Reading mode: • Turns the instrument off. From other power modes: •...

  • Page 18: Screen Description And Layout

    SECTION 1, continued 1.3 Screen Description and Layout The screen, also known as the display, is divided into two areas by a horizontal line. The upper area shows measurements or standard values, the current operation mode, sample temperature, units, error codes, and a stable reading indicator. The lower area shows the active navigation keys ( , or ENTER...
  • Page 19 SECTION 1, continued Table 2 Display Descriptions Item No. Description Indicates meter is in Calibration mode. When this icon and the are flashing, a calibration is necessary. Indicates meter is in Calibration Review mode. Indicates the battery is low. Indicates data is being or will be sent to a printer/computer, or that a printing setup has been accessed.

  • Page 20: Maintenance

    SECTION 1, continued Table 2 Display Descriptions (Continued) Item No. Description Indicates EXIT key is active. If the thermometer icon and the correction icon are on, a temperature correction other than the factory default is in use. If it is on with the (Off) icon, temperature compensation is turned off.

  • Page 21: Section 2 Instrument Setup

    SECTION 2 INSTRUMENT SETUP 2.1 Instrument Description The portable sens ™156 Multiparameter Meter is designed for field or laboratory use and operates on four alkaline batteries. Alternatively, use a docking station connected to 115/230 V ac. See Section 2.2.1. Power Connection 2.2.1 Using the Docking Station as a Power Source The sens Docking Station (Figure 3) is the ac adapter for the...
  • Page 22 SECTION 2, continued Figure 3 Using the sens Docking Station...

  • Page 23: Docking Station Connections

    SECTION 2, continued 2.2.2 Docking Station Connections The Docking Station has a power connector, a serial port, and a green indicator light on the back. The standard 9-pin RS232 serial port connector on the Docking Station is used for sending data to a printer or computer.

  • Page 24: Probe Connections

    SECTION 2, continued Figure 4 Installing Batteries in the Meter Probe Connections Attach electrodes with 5-pin connectors to the sensor input by lining the pins up with the holes in the meter port (see Figure 5). Push the electrode connector toward the instrument. Figure 5 Electrode Connectors 5-Pin Shielded...

  • Page 25: Attaching The Probe Holder To The Instrument

    SECTION 2, continued 2.3.2 Attaching the Probe Holder to the Instrument Figure 6 Attaching the Probe Holder to the instrument READ exit enter READ recall erase exit enter store recall erase store print time light setup print time light review setup review 2.4 Turning the Meter On...

  • Page 26: Printer And Computer Connections

    SECTION 2, continued Printer and Computer Connections The meter can send data to a computer or printer via the 9-pin serial port (see Figure 7). The printer cable and computer cable are different. The printer cable is a 9-pin to 25-pin cable; the computer cable is a 9-pin to 9-pin cable.

  • Page 27: Section 3 Ph Operation Mode

    SECTION 3 pH OPERATION MODE 3.1 pH Setup Menu Options Table 3 describes the options available in the pH Setup Menu. Table 3 pH Setup Options Setup Default Setup Description Option Description Number Setting Time 00:00 to 23:59 00:00 Date 01/01 to 12/31 01/01 Year...

  • Page 28: How To Change The Ph Menu Options

    SECTION 3, continued Accessing the Calibration mode or the Setup mode halts automatic data transfer. Also, if the meter has been set to the Lock mode using Setup 1, the meter will not send data. When the meter is in Lock mode and the key is pressed, automatic data READ transfer will occur at selected time intervals only until the meter...
  • Page 29 SECTION 3, continued Table 4 How to Change pH Menu Options Setup How to Get There Setup 1 From any reading mode, press SETUP Time Press ENTER Use the number keys to change the time. Press to accept the time. ENTER Setup 2 From any reading mode, press...

  • Page 30: Ph Calibration

    SECTION 3, continued 3.3 pH Calibration Hach recommends a daily two- or three-point calibration using buffers that bracket the sample pH. Store and compare the daily slope values to verify that the electrode is working properly. 3.3.1 Performing a Calibration Using Automatically Recognized Buffers 1.

  • Page 31: Performing A Manual Calibration

    SECTION 3, continued 8. When the reading has stabilized or been accepted, the standard number will change to . (To accept this calibration after two points, press . Press to accept the EXIT ENTER calibration or to cancel the calibration without saving it.) EXIT 9.

  • Page 32: Reviewing The Calibration

    SECTION 3, continued 8. Enter the pH value of the buffer using the number keys as described above. Press ENTER 9. When the reading has stabilized, the standard number will change to . (If measuring in the mV mode, press ENTER accept the reading and continue.) 10.

  • Page 33: Measuring Samples

    SECTION 3, continued 3.4 Measuring Samples After successful calibration, follow the steps below to measure samples. See the electrode manual for more information and specific procedures that use the electrode. 1. Rinse the electrode in deionized water. 2. Place the electrode in the sample. Press Stabilizing...

  • Page 35: Section 4 Conductivity Operation Mode

    SECTION 4 CONDUCTIVITY OPERATION MODE 4.1 Conductivity Setup Menu Options Table 5 describes the options available in the Conductivity Setup menu. Table 5 Setup Options Setup Setup Description Option Description Default Setting Number Time 00:00 to 23:59 00:00 Date 01/01 to 12/31 01/01 Year 2000–2099...
  • Page 36 SECTION 4, continued reference temperature. The linear temperature correction value for the meter has a default value of 2% per 1 °C. Conductivity of samples that contain other salts or ions may change at a different rate with temperature. This rate depends on the solution temperature, the ion concentration, and the reference temperature selected, and should be determined experimentally.
  • Page 37 SECTION 4, continued linear conversion. If the correction icon does not appear, the meter is using the default non-linear NaCl conversion. Reference Temperature — Conductivity standards typically have a reference temperature noted on their container. When measuring solutions that are not at the reference temperature, the meter automatically adjusts the reading to the conductivity value that would have been measured if the sample had been at the reference temperature.

  • Page 38: How To Change The Conductivity Menu Options

    SECTION 4, continued 4.2 How to Change the Conductivity Menu Options To access the Conductivity Setup menu: 1. Turn on the meter and press the key. The arrow icons that appear indicate that additional options are available within the menu. 2.

  • Page 39: Conductivity Calibration

    SECTION 4, continued Table 7 How to Change Conductivity Menu Options (Continued) Setup How to Get There Setup 7 From Conductivity Reading mode, press SETUP TDS Correction Press the until the setup number is 7. UP ARROW Factor Press ENTER Press the keys to switch between linear and non-linear DOWN ARROW...

  • Page 40: Calibrating With A Known Nacl Standard

    Section 4.3.3 for instructions on this calibration method. 4.3.1 Calibrating with a Known NaCl Standard Hach's Conductivity probe is shipped with a 1000 µS/cm (at 25 °C) NaCl standard solution. For typical applications with conductivity of 0–10,000 µS (10 mS/cm), calibrate with this standard to achieve the accuracy specified for the meter.

  • Page 41: Calibrating With A Known Kcl Standard

    SECTION 4, continued 6. When the value and units are correct, press ENTER calibrate on the standard. The meter automatically corrects the calibration measurement to the 25 °C reference temperature using the NaCl-based, non-linear temperature coefficient. 7. The meter will return to Conductivity Reading mode when the calibration is finished.

  • Page 42: Reviewing Calibrations

    SECTION 4, continued 3. Press the to display the standard concentration UP ARROW value. Record this value. Press EXIT 4. As the conductivity of the sample measurements change, the cell constant can be updated without calibrating with a standard. First, press 5.

  • Page 43: Measuring Conductivity

    (derived from ASTM method D 1125-91, page 253, 1993). For greatest accuracy, Hach recommends using the Low Ionic Strength Chamber to prevent gases in the atmosphere from changing the conductivity level.

  • Page 44: Measuring Total Dissolved Solids

    SECTION 4, continued 3. When the conductivity value stabilizes, store or record it. Note: If the non-temperature-corrected conductivity of the sample increases above 1 µS/cm, the meter will use the temperature correction coefficients for NaCl. This may cause a noticeable jump in the displayed conductivity reading.

  • Page 45: Substances That May Affect Measurement

    SECTION 4, continued 1. From Salinity mode, press the . The instrument UP ARROW will ask whether you would like to use the current measurement as the salinity correction factor for DO measurements. 2. Press to accept or to cancel. If you select ENTER EXIT ENTER...

  • Page 46: Theory Of Conductivity Measurement

    The Hach Conductivity measuring system has an innovative two-cell probe design. With this design, a single probe can take measurements within the full, dynamic range of the instrument.
  • Page 47 SECTION 4, continued The S.I. unit for conductivity is Siemens (S) (1 Siemen = 1 mho). Other units are: 1/ohm = 1 mho = 1000 mS = 1,000,000 µS. Since the cell’s physical configuration significantly affects the conductivity measurement, it must be multiplied by the conductance to obtain the actual conductivity reading.

  • Page 49: Section 5 Dissolved Oxygen Operation Mode

    SECTION 5 DISSOLVED OXYGEN OPERATION MODE 5.1 Dissolved Oxygen Setup Menu Options Table 10 describes the options available in the Dissolved Oxygen Setup Menu. Table 10 Setup Options Setup Setup Description Option Description Default Setting Number Time 00:00 to 23:59 00:00 Date 01/01 to 12/31...

  • Page 50: Do Probe

    SECTION 5, continued To set the time, date, year, or temperature units, follow the instructions in Table 4 on page 29. Table 11 shows how to change the other setup options. Table 11 How to Change Dissolved Oxygen Menu Options Setup How to Get There Setup 5...
  • Page 51 SECTION 5, continued 4. While holding the DO probe vertically with the tip pointing down, gently screw the module cap onto the tip. Electrolyte should leak out of the threads. Note: If electrolyte does not leak out of the threads, air may remain inside the module cap.

  • Page 52: Dissolved Oxygen Calibration

    Calibration may be performed by setting a water sample to 100% saturation. See Section 5.4.5. 5.4.1 Probe Polarization Hach dissolved oxygen probes are continuously polarized when they are connected to the instrument. A steady reading will not be seen for 30–50 minutes when the probe electrolyte is new or when the probe has been unplugged for more than one hour.

  • Page 53: Zeroing The Probe

    SECTION 5, continued 5.4.2 Zeroing the Probe A new DO probe can generate a 0.02 to 0.05 mg/L positive error in an oxygen-free (anoxic) solution. If this level of error is unacceptable, zero the meter with the following procedure when: •...

  • Page 54: Calibration In Water Saturated Air

    SECTION 5, continued reading mode, add additional sodium sulfite and cobalt standard solution to the anoxic solution. Otherwise, press the key to back up one display screen at a time and leave the EXIT calibration routine without completing the zeroing procedure. 5.4.3 Calibration in Water Saturated Air 1.

  • Page 55: Calibration To A Known Dissolved Oxygen Concentration

    SECTION 5, continued 8. When the calibration is complete, the meter will return to the reading mode. Press the key during the calibration EXIT sequence to back out of the calibration routine, one screen at a time, without completing a calibration. Note: If the icons flash after calibration, the calibration failed and needs to be repeated.

  • Page 56: Calibrating A Sample To Read 100% Saturation

    SECTION 5, continued 2. The sample must have a flow rate or stirring rate that allows for accurate probe performance. See Section 5.5.2 on page 58. Make sure that no air bubbles are trapped in the sensing area of the probe tip. 3.

  • Page 57: Calibration Review

    SECTION 5, continued 2. The sample must have a flow rate or stirring rate that allows for accurate probe performance. See Section 5.5.2 on page 58. Make sure that no air bubbles are trapped in the sensing area of the probe tip. 3.

  • Page 58: Measuring Dissolved Oxygen

    SECTION 5, continued 5.5 Measuring Dissolved Oxygen 5.5.1 General Probe Operation Follow the procedures presented below to obtain maximum performance and accuracy from your sens 156 DO system: • Use the DO probe for aqueous applications only. • Take extra care when handling and storing the oxygen membrane module cap.

  • Page 59: Probe Storage

    SECTION 5, continued 3. Insert the probe into the sample to the desired depth. The probe must be deep enough to cover the thermistor (metallic button) located on the side of the probe. 4. Agitate the probe in the sample to dislodge air bubbles from the sensing area of the probe tip.

  • Page 60: Maintenance

    When the DO probe is withdrawn, the displaced solution can drain back into the bottle. • The funnel is designed to act as an electrode holder. This kit is designed for use with Hach Model 51970 DO probe only.

  • Page 61: Making Bod Determinations

    SECTION 5, continued 5.7 Making BOD Determinations Use the Hach BOD Accessory Kit with a magnetic stir plate and a standard 300-mL BOD bottle. 1. Fill a standard 300-mL BOD bottle with the water sample and insert the overflow funnel.
  • Page 62 SECTION 5, continued HRS MIN SEC HRS MIN SEC Prepare the Insert the DO probe Wait at least ten Press the key. calibration and storage into the calibration and minutes for the The display will show chamber by holding it storage chamber.
  • Page 63 SECTION 5, continued setup Stabilizing... CORRECTION 7 8 9 7 8 9 7 8 9 exit enter exit enter exit enter 4 5 6 4 5 6 4 5 6 1 2 3 1 2 3 1 2 3 Press the When the Add the weight If necessary, enter...
  • Page 64 SECTION 5, continued Note: The displayed % Press the key to saturation will be based on change the display from a meter calculation for the concentration in mg/L to equilibrium dissolved % saturation. oxygen concentration. The calculation uses the sample temperature, salinity, barometric pressure, and measured concentration in mg/L...
  • Page 65 SECTION 5, continued sulfide, sulfur dioxide, and boranes can react at the anode. After exposure to reducing gases, the user may need to clean the anode and replace the internal filling solution and membrane cap. Summary of Method The sens 156 Meter responds to the dissolved oxygen concentration activity by developing an electrical current.

  • Page 66: Salinity Correction Factors

    SECTION 5, continued 5.9 Salinity Correction Factors Use the values in Table 12 if you do not have a conductivity probe. Use a conductivity meter to obtain conductivity in mS/cm at reference temperature (20 °C), then use Table 12 to estimate the salinity correction factor (in ppt*) to the nearest whole number.

  • Page 67: Pressure Conversions

    SECTION 5, continued 5.10 Pressure Conversions Table 13 Pressure Conversions hPa (mbar) mm Hg inches Hg 0.75006 0.02953 1 hPa (mbar) 1.3332 0.039370 1 mm Hg 33.864 25.400 1 inch Hg Example: To convert 1013.25 hPa to mm Hg, multiply 1013.25 by 0.75006. The result is 760 mm Hg.

  • Page 69: Section 6 Storing And Recalling Data

    SECTION 6 STORING AND RECALLING DATA 6.1 Storing Measurements The sens ™156 Meter can store up to 199 measurements for each parameter. Store the data and recall it later for reviewing, downloading, or printing. The following information is stored (and can be downloaded or printed) for each sample: Conductivity Dissolved Oxygen Date...

  • Page 70: Recalling Stored Data

    SECTION 6, continued location using the number keys. If a data point already has data in it, you cannot scroll to it. Enter the desired location with the number keys. The meter will ask if you want to erase the current data in order to save the new data. Press ENTER accept the location and store the data.

  • Page 71: Ph Data

    SECTION 6, continued 6.2.1 pH Data 1. Recall pH data as described in Section 6.2. 2. Press the key to toggle between those two forms. pH/mV 3. To view the time and date of the stored value, press the TIME key once or twice.

  • Page 72: Dissolved Oxygen Data

    SECTION 6, continued 6.2.3 Dissolved Oxygen Data 1. Recall DO data as described in Section 6.2. 2. Press the key to toggle between those two forms. DO/% 3. Press the key in succession to view the following data ENTER for each of the measurements: Salinity Correction Pressure 4.

  • Page 73: Erasing Multiple Data Points

    SECTION 6, continued 6.3.2 Erasing Multiple Data Points 1. Recall the data that will be erased. See Section 6.2. 2. When the point is displayed, press ERASE 3. To erase all data from the current parameter press the . The instrument will show , the current Erase ARROW...

  • Page 75: Section 7 Printing And Data Transfer

    IBM-compatible applications. The Citizen PN60 printer requires a special printer cable that is shipped with the printer when it is ordered from Hach Company. Table 14 Standard 9-pin to 25-pin Printer Cable Serial Printer 25-pin D Connector,...
  • Page 76 SECTION 7, continued 2. Gently and firmly push the cable into the Docking Station. 3. Tighten the screws on each side of the cable connector (see Figure 9). Connect the cable to the printer in the same manner. 4. Once the communication link is established, press PRINT send data to the printer.

  • Page 77: Connecting To A Personal Computer

    SECTION 7, continued 7.1.3 Connecting to a Personal Computer Connect the Docking Station to a personal computer (PC) with the computer interface cable (Cat. No. 48129-00) listed under REPLACEMENT PARTS AND ACCESSORIES on page 85. The cable directly links the meter and the 9-pin D connector used for the serial port on most personal computers.

  • Page 78: Using Hachlink™ Communications Software With A Pc

    SECTION 7, continued 7.1.4 Using HachLink™ Communications Software with a PC HachLink (Cat. No. 49665-00) software allows a personal computer to capture data from sens ™ electrochemical meters. Users can store the captured data in a text file, a spreadsheet compatible format (i.e., Excel, Microsoft Works, Lotus 123), or unformatted text.

  • Page 79: Sending Multiple Data Points

    SECTION 7, continued 3. The words , the sample number, and a PRINT Sample flashing will be displayed. 4. Press to print the recalled data point. ENTER 5. Press to return to the reading mode. EXIT 7.2.3 Sending Multiple Data Points 1.

  • Page 80: Printed Data Formats

    SECTION 7, continued 7.3 Printed Data Formats 7.3.1 pH Printed Data Format Storage Meter Serial Software Reading Temperature Date Time Location Reading Model Number Version 7.53 pH 22.7 C -30.0 10/03/98 08:30 sensIon156 12344577 PX.X 6.13 pH 13.6 C 50.0 10/04/98 09:11 sensIon156...

  • Page 81: Section 8 Troubleshooting

    Table 16 Error Codes Error Meaning Possible Remedy Code Unconfigured instrument (no data in Call or return to Hach service. EEPROM) pH calibration error (latest point produced Verify you have the correct buffer and invalid slope)—probably read the wrong reread.

  • Page 82: Meter Service Request Questionnaire

    SECTION 8, continued 8.2 Meter Service Request Questionnaire 1. What is the complete lot code of the meter and electrode? 2. On what date was the meter purchased? 3. How long has the meter been in use? 4. What types of samples are being tested? 5.

  • Page 83: 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.

  • Page 85: Replacement Parts And Accessories

    REPLACEMENT PARTS AND ACCESSORIES ACCESSORIES Quantity Required Description Per Test Unit Cat. No. Batteries, AA..................4/pkg ....19380-04 Docking Station, external, 115 V, N. American style plug ....each ....51875-01 Docking Station, external, 230 V, European style plug......each ....51875-02 Electrode Stand ..................each ....45300-00 Electrode Stand with Electromagnetic Stirrer, 115 V ac......each ....45300-01 Electrode Stand with Electromagnetic Stirrer, 230 V ac......each ....45300-02 Print Cartridges for PN60, black ............
  • Page 86 REPLACEMENT PARTS AND ACCESSORIES, continued OPTIONAL APPARATUS, pH, continued Quantity Required Description Per Test Unit Cat. No. Electrode Washer ................. each ....27047-00 Temperature Probe, 5-pin ..............each ....51980-00 OPTIONAL APPARATUS, pH, continued Stir Bar, in................each ....45315-00 REQUIRED REAGENTS, CONDUCTIVITY TDS Singlet, 180 µ...
  • Page 87 REPLACEMENT PARTS AND ACCESSORIES, continued OPTIONAL REAGENTS, DISSOLVED OXYGEN Quantity Required Description Per Test Unit Cat. No. Cobalt Standard Solution, 1000 mg/L..........100 mL....21503-42 Filling Solution, Dissolved Oxygen ..........50 mL ....27591-26 Silica 3 Reagent Powder Pillows (contains sodium sulfite)... 100/pkg .....271-69 Sodium Sulfite..................

  • Page 89: How To Order

    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 contact: In Canada, Latin America, Africa, Asia, Pacific Rim: Telephone: (970) 669-3050;...

  • Page 90: 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: Hach Company 100 Dayton Avenue Ames, Iowa 50010 (800) 227-4224 (U.S.A. only)

  • Page 91: Warranty

    HACH WARRANTS TO THE ORIGINAL BUYER THAT HACH PRODUCTS WILL CONFORM TO ANY EXPRESS 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.

  • Page 93: 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 sens 156™ Multiparameter Meter has been tested and is certified as indicated to the following instrumentation standards:...
  • Page 94 Class “B” emission limits. Supporting test records by Hewlett Packard, Fort Collins, Colorado Hardware Test Center (A2LA # 0905-01), certified compliance by Hach Company. Standards include: EN 61000-3-2 Harmonic Disturbances Caused by Electrical...
  • Page 95 CERTIFICATION, continued (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
  • Page 96 Telephone: (970) 669-3050 FAX: (970) 669-2932 FOR TECHNICAL ASSISTANCE, PRICE INFORMATION AND ORDERING: In the U.S.A. - Call toll-free 800-227-4224 Outside the U.S.A. - Contact the HACH office or distributor serving you. On the Worldwide Web - www.hach.com ; E-mail - techhelp@hach.com...

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