Hach sension1 Instruction Manual
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Hach sension1 Instruction Manual

Portable ph meter
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51700-18
Portable pH Meter
Instruction Manual
© Hach Company, 1999, 2000. All rights reserved. Printed in the U.S.A.
hm/dk 3/99 1ed
jnb/dk 9/00 rev4

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  • Page 1 51700-18 Portable pH Meter Instruction Manual © Hach Company, 1999, 2000. All rights reserved. Printed in the U.S.A. hm/dk 3/99 1ed jnb/dk 9/00 rev4...
  • Page 2 TRADEMARKS OF HACH COMPANY AccuGrow ® H 2 O University™ Pond In Pillow™ AccuVac ® PourRite ® H 2 OU™ Hach Logo ® AccuVer™ PrepTab™ Hach One ® AccuVial™ ProNetic™ Hach Oval ® Add-A-Test™ Pump Colorimeter™ QuanTab ® AgriTrak™ Hach.com™...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS CERTIFICATION ........................5 SAFETY PRECAUTIONS ....................... 7 SPECIFICATIONS........................9 OPERATION ........................11 SECTION 1 INTRODUCTION ................... 13 1.1 Unpacking the Instrument ....................13 1.1.1 Standard Accessories ....................13 1.2 Keypad Description ......................15 1.3 Display Fields and Icons ....................16 1.4 Audible Signals .........................
  • Page 4 TABLE OF CONTENTS, continued SECTION 4 TROUBLESHOOTING ................. 31 4.1 Introduction........................31 4.2 Shorting Test ........................31 4.3 Error Codes ........................32 4.4 Meter Service Request Questionnaire................32 GENERAL INFORMATION ................... 33 REPLACEMENT PARTS....................... 35 HOW TO ORDER ........................37 REPAIR SERVICE .........................

  • Page 5: 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 1 Portable pH Meter has been tested and is certified as indicated to the following instrumentation standards:...
  • Page 6 Règlement sur le matériel brouilleur du Canada. FCC PART 15, Class “A” Limits: Supporting test records by Criterion Technology O.A.T.S. (NVLAP #0369), certified compliance by Hach Company. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:...

  • Page 7: Safety Precautions

    SAFETY PRECAUTIONS Section 2.2 on page 19, Battery Installation...

  • Page 9: Specifications

    0.1 °C Accuracy ±0.3 from 0–70 °C; ±1.0 from >70–110 °C Display: Custom LCD Inputs: 1 BNC; 5-pin Hach pH/temperature or Hach temperature probe; 1 pin-tip Power Requirements: 4 alkaline AA batteries Input Impedance: >10 ohms Instrument Drift: <40 µV/°C Input Bias Current: <±1 picoamp at 25 °C;...

  • Page 11: 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 13: Section 1 Introduction

    SECTION 1 INTRODUCTION This manual describes the operation and use of the Hach sens 1 Portable pH/mV/Temperature Meter (see Figure 1). ™ This meter features a custom digital LCD display which simultaneously shows temperature and measurement results. This meter has all the features of a simple pH meter plus a millivolt mode, IP67 waterproof design, electrode holder, ergonomic design, and automatic buffer recognition.
  • Page 14 SECTION 1, continued Figure 1 Hach sens 1 Meter Figure 2 Electrode Holder...

  • Page 15: Keypad Description

    SECTION 1, continued 1.2 Keypad Description Figure 3 illustrates the meter’s keypad. The description and function of each key is given in Table 1. Figure 3 sens 1 Meter Keypad Table 1 Keys and Description Description Exit/Power On-Off Turns the instrument on; turns it off from the Reading mode. Acts as a NO or CANCEL key when the question mark icon is flashing.

  • Page 16: Display Fields And Icons

    SECTION 1, continued 1.3 Display Fields and Icons The display has two screens. The upper screen displays measurements or standard values, the operation mode in use, slope, sample/default temperature, pH or mV units, error codes, and indicates if the meter reading is stable. The lower screen displays the acrive keys.
  • Page 17 SECTION 1, continued Table 2 Main Display Elements Item No. Description Indicates meter is in Calibration mode. If the is flashing, calibration is necessary. Indicates meter is in Calibration Review mode. 3 (NA) Indicates data is being sent to a printer/computer. 4 (NA) Indicates recalled data that is currently displayed is being erased.

  • Page 18: Audible Signals

    SECTION 1, continued Table 2 Main Display Elements (Continued) Item No. Description Stabilizing... When on or flashing, indicates signal from sample is not yet stable. When it disappears, the reading is stable and may be recorded. Used with ? icon. Asks if user wants to store the displayed sample data or the calibration that has been just completed.

  • Page 19: Section 2 Instrument Setup

    SECTION 2 INSTRUMENT SETUP 2.1 Instrument Description ™ This durable portable sens 1 pH/mV meter is designed for easy hand-held use when measuring samples in the field or laboratory. The meter operates on 4 alkaline batteries with an estimated battery life of at least 500 hours of continuous use. The meter measures from -2.0 to 19.99 pH units and the sample temperature.
  • Page 20 SECTION 2, continued When battery replacement is necessary, replace all four batteries. The position of the batteries in the instrument is important. Icons of the correct orientation are molded into the bottom of the battery compartment. With the connectors pointing away from you, insert a battery in left-most position so the positive end faces you.

  • Page 21: Probe Connections

    SECTION 2, continued 2.3 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 6). Push the electrode connector toward the instrument. For probes with BNC connectors, slide the connector into the input.

  • Page 22: Temperature Probe Connection

    SECTION 2, continued 2.3.1 Temperature Probe Connection Hach electrodes with the 5-pin connector have the temperature sensing unit included in the electrode probe. If using an electrode with BNC connector, connect a Hach Temperature Probe (Cat. No. 51980) to the 5-pin connector on the meter (see Figure 6).

  • Page 23: Millivolt Measurements

    -2000 to 2000. The millivolt mode is useful when measuring oxidation-reduction potential, performing potentiometric titrations, or preparing calibration curves. Detailed instructions for any Hach electrode are given in the electrode instruction manual. Titration instructions are included in the Hach ORP Electrode Instruction Manual, or in standard analytical chemistry texts.

  • Page 25: Section 3 Instrument Operation

    SECTION 3 INSTRUMENT OPERATION 3.1 Setup Menu ™ The sens 1 Portable pH meter has a setup menu that allows the analyst to choose options for connector choice, display lock, temperature units, automatic buffer recognition of pH 6.86 or 7.0, and the display resolution.

  • Page 26: Turning Display Lock Off And On

    SECTION 3, continued 3.1.2 Turning Display Lock Off and On Setup 2 is Display Lock option. This feature stops measurement reading fluctuation on the display once a stable reading is reached. The default setting is Off. When this feature is not used, the measurement value may continue to fluctuate and may be displayed.

  • Page 27: Selecting Measurement Resolution

    EXIT the reading mode. 3.2 Calibrating the Meter Hach recommends a daily two- or three-point calibration using buffers that bracket the sample pH. This will verify the electrode is working properly and allow the slope value to be stored.

  • Page 28: Performing A Calibration Using Ph 4, 6.86, 7, And 10 Buffers

    SECTION 3, continued 3.2.1 Performing a Calibration Using pH 4, 6.86, 7, and 10 Buffers 1. If using a probe without a temperature sensor, see Section 2.3.1 on page 22 and Section 2.5 on page 22 for information about obtaining and using a default temperature. 2.

  • Page 29: Reviewing The Calibration

    SECTION 3, continued 10. To save the calibration and return to the Reading mode, press . To exit the calibration without saving it and return to ENTER the reading mode, press EXIT 3.3 Reviewing the Calibration 1. From the pH Reading mode, press the key.

  • Page 30: Measuring Samples

    SECTION 3, continued 3.4 Measuring Samples After successful calibration, the meter is ready to measure samples. See instructions in the electrode manual for more information and specific steps for using the electrode. 1. Place the electrode in the sample. Press READ/ENTER will appear, along with the sample temperature Stabilizing...

  • Page 31: Section 4 Troubleshooting

    ™ electrochemical meters is limited to responding to the error message displayed. Other problems must be handled by a Hach technician at a service center. Refer to REPAIR SERVICE on page 38. Do not attempt to service the meter as there are no field- serviceable parts.

  • Page 32: Error Codes

    SECTION 4, continued 4.3 Error Codes Error codes indicate a functional problem with the meter and/or the electrode. Error code numbers will appear in the temperature field along with other icons. Table 4 describes the possible error codes and some possible solutions to eliminate the cause. Table 4 Error Codes Error Code Error Name &...

  • Page 33: 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 35: Replacement Parts

    REPLACEMENT PARTS REQUIRED REAGENTS Quantity Required Description Per Test Unit Cat. No. Buffer, Powder Pillows pH 4.01, color-coded red ..........1..15/pkg....22269-95 pH 7.00, color-coded yellow..........1..15/pkg....22270-95 pH 10.00, color-coded blue ..........1..15/pkg ....22271-95 Buffer Solutions pH 4.01, color-coded red ..........20 mL ... 500 mL....22834-49 pH 7.00, color-coded yellow........

  • Page 37: How To Order

    Specialists in analytical methods, they are happy to put their talents to work for you. 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.

  • Page 38: Repair Service

    REPAIR SERVICE...

  • Page 39: 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 40 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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