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31

SECTION 4

TROUBLESHOOTING

4.1

Introduction

Correcting problem conditions with the sens

ion

™

 

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. Opening the meter case will void the warranty.

4.2

Shorting Test

This test detects the meter offset. 

1. Turn the meter on. Connect the shorting cap to the BNC 

connector (see Figure 7). Unplug any electrodes from the 
5-pin connector. Select the BNC connector from Setup 1.

2. Change the output to display in mV (press 

pH/mV

 to toggle 

between pH and mV readings). After the meter has stabilized, 
simultaneously press 

CAL

 and 

ENTER

. The display should 

show 

0.0 mV

. If it does not, contact Hach Service.

Figure 7

Attaching Shorting Cap to The BNC Connector

Summary of Contents for sension1

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: ...ch Guy HexaVer HgEx HydraVer ICE PIC IncuTrol Just Add Water LeadTrak M ColiBlue24 ManVer MolyVer Mug O Meter NetSketcher NitraVer NitriVer NTrak OASIS On Site Analysis Results You Can Trust OptiQuant OriFlow OxyVer PathoScreen PbEx PermaChem PhosVer Pocket Colorimeter Pocket Pal Pocket Turbidimeter Pond In Pillow PourRite PrepTab ProNetic Pump Colorimeter QuanTab Rapid Liquid RapidSilver Ratio Ro...

Page 3: ... 2 3 1 Temperature Probe Connection 22 2 4 Turning the Meter On 22 2 5 Temperature Measurement 22 2 6 Millivolt Measurements 23 2 7 Automatic Shut off Function 23 SECTION 3 INSTRUMENT OPERATION 25 3 1 Setup Menu 25 3 1 1 Choosing the Probe Connector 25 3 1 2 Turning Display Lock Off and On 26 3 1 3 Selecting Temperature Units 26 3 1 4 Selecting Measurement Resolution 27 3 1 5 Selecting Auto Buffer...

Page 4: ...nued 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 38 WARRANTY 39 ...

Page 5: ...61000 4 3 1995 Radiated RF Electro Magnetic Field Immunity Criteria B ENV 50204 1996 Radiated Electro Magnetic Field from Digital Telephones Criteria B Radio Frequency Emissions Per 89 336 EEC EMC EN 61326 1998 Electrical Equipment for measurement control and laboratory use EMC requirements Class B emission limits Supporting test records by Criterion Technology O A T S NVLAP 0369 certified complia...

Page 6: ... Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communicati...

Page 7: ...7 SAFETY PRECAUTIONS Section 2 2 on page 19 Battery Installation ...

Page 8: ...8 ...

Page 9: ...solution 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 1012 ohms Instrument Drift 40 µV C Input Bias Current 1 picoamp at 25 C 4 picoamp over full range Environmental Requirements 0 to 50 C at 85 non condensing relative humidity Dimensions 21 2...

Page 10: ...10 ...

Page 11: ...uede ser peligrosa Revise las fichas de seguridad de materiales y familiarícese con los procedimientos de seguridad antes de manipular productos químicos GEFAHR Das Arbeiten mit chemischen Proben Standards und Reagenzien ist mit Gefahren verbunden Es wird dem Benutzer dieser Produkte empfohlen sich vor der Arbeit mit sicheren Verfahrensweisen und dem richtigen Gebrauch der Chemikalien vertraut zu ...

Page 12: ...12 ...

Page 13: ...e to remain hydrated when not in use see Figure 2 Electrode Holder The meter is designed to be maintenance free If the meter gets dirty wipe the surface with a damp cloth Use a cotton tipped applicator to clean or dry the connectors if they get wet 1 1 Unpacking the Instrument Remove the instrument and accessories from the shipping container and inspect each item for any damage that may have occur...

Page 14: ...14 SECTION 1 continued Figure 1 Hach sension1 Meter Figure 2 Electrode Holder ...

Page 15: ...alibration review Arrow Keys Scroll between options in Setup mode Change the default temperature when a temperature probe is not in use In Setup mode back up one step toward the Reading mode READ ENTER Key Acts as a YES key when the question mark is flashing Allows user to edit a setup when the setup number is flashing Initiates a new measurement when the meter has stabilized in the Display Lock E...

Page 16: ...mV units error codes and indicates if the meter reading is stable The lower screen displays the acrive keys Figure 4 shows the icons and screens displayed by the meter and Table 2 describes each element Several icons on the display are not used by the portable pH sension1 meter indicated by NA in the table but will be displayed if the power key is held down for several seconds Figure 4 Display Ele...

Page 17: ...ys the slope and pH or mV values of standards and samples 13 Indicates measurement units pH or mV 14 When Default is displayed the meter is using the default temperature value to calculate the temperature correction for the pH value 15 Temperature units choice of C or F 16 Indicates the value displayed in small numerical field item 17 is in millivolts 17 Numerical field that displays temperature v...

Page 18: ... Display Lock setting to signal an error condition 31 When on or flashing Stabilizing indicates signal from sample is not yet stable When it disappears the reading is stable and may be recorded 32 Used with icon Asks if user wants to store the displayed sample data or the calibration that has been just completed 33 NA Used with large display to indicate the time is being set 34 NA Indicates meter ...

Page 19: ...des piles alcalines dans cet appareil Les autres types de piles peuvent créer des risques pour la sécurité ATENCIÓN Utilice solamente baterias alcalinas en este producto El uso de otros tipos de baterias puede causar riesgos de seguridad VORSICHT Verwenden Sie in diesem Produkt nur Alkali Batterien Die Verwendung anderer Batterien gefährdet die Betriebssicherheit ATENÇÃO Use somente baterias alcal...

Page 20: ...olded 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 Insert the other three batteries so the positive and negative ends alternate i e Insertion is easiest if the battery is pushed against the spring connector first then pressed into place Figure 5 Battery Replacement Slide to Open ...

Page 21: ...ockwise to lock into position Electrodes may be attached to both the 5 pin and BNC connectors at the same time as long as they are not in contact with the same solution To select either of the connectors for measurement go to the Setup 1 menu and select one When using half cells connect reference electrodes with pin tip connectors by pushing the connector straight into the center reference input I...

Page 22: ...imultaneously with sample results If a temperature probe is properly connected actual temperature measurements are displayed in the temperature mV field The meter requires a temperature to calculate temperature corrected pH readings The meter uses temperature data from one of three sources The temperature sensor in the sample The factory default setting 25 C A user entered setting which becomes th...

Page 23: ...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 2 7 Automatic Shut off Function The meter is eq...

Page 24: ...24 ...

Page 25: ...Table 3 describes these options 3 1 1 Choosing the Probe Connector This setup ensures the potential from the appropriate electrode is detected by the meter Connect only one electrode to the meter 1 From the reading mode press SETUP 2 The Setup icon and the number 1 flashing will be displayed Change the connector choice by pressing ENTER this toggles the selection between BNC and 5 pin 3 When the d...

Page 26: ...display lock between off and on When the display lock is disabled the Display Lock icon and Off are displayed When this feature is enabled the Display Lock icon is displayed without Off When this feature is enabled the Display Lock icon is displayed when the stabilization criteria are met 4 When the desired option is selected press EXIT to return to the reading mode 3 1 3 Selecting Temperature Uni...

Page 27: ...cognize and calibrate on 4 01 6 86 or 7 00 and 10 01 pH buffers Buffers with pH values other than these cannot be used to calibrate the sension1 meter The only selection option for pH buffer auto recognition is 6 86 or 7 00 The default is pH 7 00 To change this option 1 From the reading mode press SETUP 2 The Setup icon and the number 1 flashing will be displayed Press the up arrow until the Setup...

Page 28: ...display area along with Standard and 1 4 Press READ ENTER The temperature and pH values will be updated until a stable reading is reached Note If the meter is measuring in pH mode it automatically moves to the next calibration step when stabilization is reached indicated by three beeps If measuring in mV mode the three beeps will still sound when the stabilization occurs but ENTER must be pressed ...

Page 29: ... will show the standard number standard pH and temperature view mV value by pressing pH mV Press the up arrow once 3 The meter will continue to scroll through the standard information with each press of the up arrow key When all the standards have been displayed press the up arrow key again 4 The meter will display the slope and offset of the calibration curve 5 To exit Cal Review mode press EXIT ...

Page 30: ...ock is enabled the display will lock in on the pH or mV and sample temperature If the Display Lock is off the display will show the current reading and temperature but the values may fluctuate 3 Record the pH or mV value 4 Remove the electrode from the sample rinse with deionized water and place the electrode in the next sample Repeat Steps 1 3 for each sample 5 When measurements are complete pres...

Page 31: ...able parts Opening the meter case will void the warranty 4 2 Shorting Test This test detects the meter offset 1 Turn the meter on Connect the shorting cap to the BNC connector see Figure 7 Unplug any electrodes from the 5 pin connector Select the BNC connector from Setup 1 2 Change the output to display in mV press pH mV to toggle between pH and mV readings After the meter has stabilized simultane...

Page 32: ...stored between uses 8 If the meter has been in use for a while what maintenance has been performed 9 Describe the suspected problem or failure of the meter 10 Please have your meter electrode buffers standards and this completed questionnaire near the phone before calling technical support Table 4 Error Codes Error Code Error Name Display Icons Description 2 Cal slope error ERROR and SLOPE will be...

Page 33: ...33 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 GENERAL INFORMATION ...

Page 34: ...34 ...

Page 35: ...re Probe 5 pin 1 each 51980 00 OPTIONAL APPARATUS Demineralizer Bottle 177 mL each 14299 00 Electrode pH gel filled w temp 5 pin connector each 51935 00 Electrode pH combination flat end 5 pin each 51915 00 Electrode reference single junction each 50220 00 Electrode reference double junction each 50225 00 Electrode Stand each 45300 00 Electrode Stand with Electromagnetic Stirrer 115 VAC each 45300...

Page 36: ...36 ...

Page 37: ...oducts and their use 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 In Canada Hach Sales Service Canada Ltd Manitoba Canada Telephone 204 632 5598 FAX 20...

Page 38: ...38 REPAIR SERVICE ...

Page 39: ... 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 DISCLAIMS ANY WARRANTIES IMPLIED BY LAW INCLUDING BUT NOT BINDING TO ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE LIMITATION OF REMEDIES THIS IS THE EXCLUSIVE REMEDY FOR ANY BREACH OF WA...

Page 40: ... 0389 Telephone 970 669 3050 FAX 970 669 2932 FORTECHNICAL ASSISTANCE PRICE INFORMATION AND ORDERING Call 800 227 4224 Contact the HACH office or distributor serving you www hach com techhelp hach com In the U S A Outside the U S A On the Worldwide Web E mail toll free ...

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