Swan Analytical Instruments Chematest 42 Operator's Manual
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Swan Analytical Instruments Chematest 42 Operator's Manual

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A-96.730.111 / 160124
Chematest 42
Operator's Manual
Chematest 42

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  • Page 1 A-96.730.111 / 160124 Chematest 42 Operator’s Manual Chematest 42...
  • Page 2 Studbachstrasse 13 8340 Hinwil Switzerland Internet: www.swan.ch E-mail: support@swan.ch Document Status Title: Chematest 42 Operator’s Manual A-96.730.111 Revision Issue March 2023 First edition © 2023, Swan Analytische Instrumente AG, Switzerland, all rights reserved. This manual applies to firmware V2.11 and higher.

  • Page 3: Table Of Contents

    Chematest 42 Table of Contents Safety Instructions ..........
  • Page 4 Data Management ..........31 9.1. Display of Data History on the Chematest 42 ......31 9.2.
  • Page 5 Chematest 42 Technical Data ..........65 14.1.

  • Page 6: Safety Instructions

    Chematest 42 Safety Instructions Operator’s Manual Safety Instructions For safe instrument operation, you must read and understand the instructions in this manual. Warning notices The symbols used for safety-related notices have the following meaning: WARNING Severe injuries or damage to the equipment can occur if such warnings are ignored.
  • Page 7  Do not expose the instrument to direct sunlight or other sources of heat, especially when charging.  The housing of the Chematest 42 must not be opened except for the housing parts specified in the maintenance chapter.  The battery must only be replaced by authorized service personnel.

  • Page 8: Product Description

    Chematest 42 Product Description Product Description 2.1. Instrument Overview CHEMATEST Sensor socket Cuvette cap Charging socket Turbidity cuvette (black Cuvette adapter coding ring) Display Photometry cuvette (blue Keypad coding ring) A-96.730.111 / 160124...

  • Page 9: Keys

    Chematest 42 Product Description 2.2. Keys POWER to power on or off the instrument ARROW UP to move up in a menu list and to increase digits ARROW DOWN to move down in a menu list and to decrease digits...

  • Page 10: Display

    Chematest 42 Product Description 2.3. Display Once the instrument has started up, the main menu is displayed. The main menu is organized as follows: Main Menu Free chlorine Comb. Cl 1 cuv. pH Phenol red Method Catalogue Menu A Favorites list The favorites list provides quick access to frequently used methods.

  • Page 11: Ct App

    Chematest 42 Product Description 2.4. CT App The CT App is a software for communication between the Chematest 42 and a mobile device or PC. The app includes the following func- tions:  Transfer of the stored measurements and export to a CSV or Excel file ...

  • Page 12: Initial Setup

    3.1. Selecting the Language Select the applicable language from <Menu>/<Settings>/ <Miscellaneous>/<Language>. If the required language is not available on the Chematest 42, the CT App can be used to install a different language pack. See Language packs, p. 73 for details.

  • Page 13: Activating Expert Mode

     Inactive (default setting): In this mode, the Chematest 42 displays detailed on-screen instructions. Recommended for inexperienced users.  Active: In this mode, the Chematest 42 displays the instructions in shortened form and requires as few confirmations from the user as possible. 3.5.

  • Page 14: Sensor Calibration

    Chematest 42 Initial Setup 3.7. Sensor Calibration Before first use, calibrate your pH and redox sensors. See Calibration of the pH Sensor, p. 40 Calibration of the Redox Sensor, p. Note: The rubber caps that the pH and redox sensors are delivered with can be disposed of.

  • Page 15: Photometry

    Chematest 42 Photometry Photometry 4.1. Basic Rules for Photometry The precision and repeatability of a photometric determination depends greatly on the operator's technique. Please observe the following rules: Always use clean utensils Residues from previous measurements can falsify the results. The cuvette cap and all utensils such as syringes or cuvettes must be rinsed with clean water after each measurement.

  • Page 16: How To Use Reagents

    To dispense the necessary number of drops, hold the bottle at a 45° angle. Before proceeding with the measurement, make sure that the reagents are well mixed with the sample. The Chematest 42 is calibrated against Swan's OXYCON reagents. Accuracy may suffer severely if reagents from other sources are used.

  • Page 17: Overview Of Methods And Reagents

    Chematest 42 Photometry 4.3. Overview of Methods and Reagents 4.3.1 Chlorine Method Reagent 1 Reagent 2 Reagent 3 Result(s) shown Free chlorine Oxycon Start Oxycon DPD Free chlorine in ppm Cl Total chlorine Oxycon 2 Oxycon DPD Total chlorine in ppm Cl...

  • Page 18: Notes On Individual Methods

    Percentage of free 50 % chlorine in the mea- sured value Combined The method catalogue of the Chematest 42 contains two options for measuring combined chlorine: chlorine  with one cuvette or  with two cuvettes. Apart from the fact that one or two cuvettes are used, the two meth- ods are identical.

  • Page 19: Performing A Photometric Measurement

    Material Safety Data Sheets (MSDS). These can be downloaded from www.swan.ch. General A photometric measurement with the Chematest 42 consists of the following steps:  Step 1: Zero measurement  Step 2: Addition of reagents and subsequent measurement (for...
  • Page 20 Chematest 42 Photometry Example: Step 1: Zero measurement Measurement Free chlorine Free chlorine of free chlorine Fill 10 ml of sample into Place the adapter in a cuvette. Dry outer part the Chematest and and place it in the adapter.
  • Page 21 Chematest 42 Photometry Step 3: Display and storage of the measured results  Pressing [Enter] saves the Free chlorine measurement in the data history.  The measurement is initially 0.26 saved without ID and user. Note: Pressing [Exit] discards the <Enter>...

  • Page 22: Automatic Shutoff

    Chematest 42 Photometry 4.6. Automatic Shutoff When the instrument is waiting for a user input (e.g. when the mea- surement result is displayed) and no key is pressed for 10 minutes, the instrument shuts off automatically to save power. This affects the storage of measurement results in the same way as pressing the [Exit] key.

  • Page 23: Turbidity

    For this reason, and because the offset stored in the instrument is only valid for one cuvette at a time, the Chematest 42 case contains a dedicated cuvette for turbidity measurements with a black coding ring.

  • Page 24: How To Maintain Measurement Accuracy

    A part of the measured stray light is caused by reflections on the walls of the cuvette and other surfaces. This value is specific to each of turbidity combination of Chematest 42 and turbidity cuvette and is compen- cuvette sated by an offset stored in the instrument.

  • Page 25: Performing A Turbidity Measurement

    Range 0.42 ± 0.02 FNU <Enter> to save During a turbidity measurement, the Chematest 42 records multiple measuring points from which the turbidity value [A] is determined by averaging. The range [B] shows how widely the measuring points are distributed and gives an indication of how accurate the measurement is.

  • Page 26: Ph And Redox

    Chematest 42 pH and Redox pH and Redox 6.1. Basic Rules for pH and Redox Calibration To ensure correct measurement, calibrate pH and redox sensors monthly. The calibration procedure is described in Calibration of pH interval and Redox Sensors, p.

  • Page 27: Performing A Ph Measurement

    Chematest 42 pH and Redox 6.2. Performing a pH Measurement 1 Plug the sensor cable into the sensor socket. 2 Remove the storage container from the sensor. 3 Rinse the sensor tip with clean water and dip the sensor into the sample.

  • Page 28: Automatic Shutoff

     With difficult samples, it may take 15–20 minutes until the reading is stable. With a freshly calibrated sensor, it may take even longer. If the Chematest 42 switches off before the measured value has stabilized, switch it on and select the <Redox/ORP>...

  • Page 29: Conductivity

    7.1. Basic Rules for Conductivity Calibration and The conductivity sensor of the Chematest 42 is already calibrated at the factory and the cell constant is stored in the sensor. Since the verification conductivity sensor does not change its properties significantly over time, a periodic recalibration is usually not necessary.

  • Page 30: Performing A Conductivity Measurement

    Chematest 42 Conductivity 7.2. Performing a Conductivity Measurement 1 Plug the sensor cable into the sensor socket. 2 Rinse the sensor tip with clean water. 3 Immerse the sensor at least four times in the sample until the vent holes [A] are below the water surface and lift it up again to allow the sample to flow out.

  • Page 31: Automatic Shutoff

    Chematest 42 Conductivity 7.3. Automatic Shutoff When the instrument is waiting for a user input (e.g. when the mea- surement result is displayed) and no key is pressed for 10 minutes, the instrument shuts off automatically to save power. This affects the storage of measurement results in the same way as pressing the [Exit] key.

  • Page 32: Additional Parameters

    Additional Parameters Additional Parameters 8.1. Determination of Acid Binding Capacity ACD pH 4.3 Required Use the following utensils from the Chematest 42 carrying case:  cuvette utensils  cuvette adapter  syringe Procedure 1 Place the cuvette in the cuvette adapter.

  • Page 33: Data Management

    Data Management Up to 2700 measurements are memorized. Then the oldest mea- surement is deleted to save the newest one. 9.1. Display of Data History on the Chematest 42 Previous measurements can be displayed under <Menu>/ <Data Storage>/<Data History>. Scrolling ...

  • Page 34: Maintenance

    Chematest 42 Maintenance Maintenance 10.1. Photometer Verification Overview The verification kit contains two reference cuvettes (labeled “Low” and “High”) with certified reference absorptions of approximately 0.3 and 1.5 and an additional cuvette for zero point determination. The exact values are specified in the enclosed calibration certificate.

  • Page 35: Turbidimeter Verification

    Chematest 42 Maintenance 10.2. Turbidimeter Verification 10.2.1 Overview of Verification Procedures To check the instrument performance, the Chematest 42 provides the following procedures:  Verification using a sealed standard: Measurement using a sealed cuvette filled with a certified, stabilized formazine standard. Four different cuvettes with turbidity values of approximately 0, 1, 10 or 100 FNU/NTU are available.

  • Page 36: Wet Verification

    Chematest 42 Maintenance Verification Can be reviewed in <Menu>/<Data Storage>/<Verif. History>/ <Turbidity>/<Verification>. history Up to 64 verifications are memorized. Then the oldest verification is deleted to save the newest one. Storage The sealed standards have a shelf life of one year. Store them in a place protected from sunlight, preferably in the refrigerator at 5–...

  • Page 37: Check Of Turbidity Cuvette

    Chematest 42 Maintenance 10.3. Check of Turbidity Cuvette Overview During the cuvette check, a measurement with particle-free water is performed. The difference in FNU/NTU between this measurement and the offset stored in the instrument is displayed on the results screen.
  • Page 38 Chematest 42 Maintenance What to do if If the cuvette check fails, try the following corrective actions and repeat the cuvette check: the cuvette  Thoroughly clean the inside and outside of the cuvette. check fails?  It is possible that the water used still contains particles. Try a new filter or different water.

  • Page 39: Offset Determination (Turbidity)

    Chematest 42 Maintenance 10.4. Offset Determination (Turbidity) Overview The offset compensates the influence of the cuvette on the turbidity measurement. It consists of a measurement of particle-free water and the result is displayed in mV. The offset must be determined in the following cases: –...

  • Page 40: Calibration Of Turbidity Measurement

    Chematest 42 Maintenance 10.5. Calibration of Turbidity Measurement Reference Any formazine standard with a turbidity value between 10 and 1000 FNU/NTU can be used for calibration. Program the reference value value under <Menu>/<Settings>/<Sensors>/<Turbidity>/<Cal. Std.>. Handling of Formazine standards must be mixed before use to obtain an even distribution of the suspension.

  • Page 41: Cleaning The Instrument

    Chematest 42 Maintenance 10.6. Cleaning the Instrument Photometer The photometer compartment can be easily cleaned if water or re- agents have been spilled. Turn the unit to the rear, loosen the two compartment screws [A] and remove the cover [B]. Use a soft, lint-free cloth moist- ened with water to clean the photometer compartment.

  • Page 42: Calibration Of Ph And Redox Sensors

    History The calibration history of the pH sensor is stored in the internal memory of the Chematest 42 and can be reviewed in <Menu>/ <Data Storage>/<Calibration History>/<Sensors>/<pH>. Up to 64 calibrations are memorized. Then the oldest calibration is deleted to save the newest one.

  • Page 43: Calibration Of The Redox Sensor

    History The calibration history of the redox sensor is stored in the internal memory of the Chematest 42 and can be reviewed in <Menu>/ <Data Storage>/<Calibration History>/<Sensors>/<Redox/ORP>. Up to 64 calibrations are memorized. Then the oldest calibration is deleted to save the newest one.

  • Page 44: Calibration Of The Conductivity Sensor

    Chematest 42 Maintenance 10.8. Calibration of the Conductivity Sensor Calibration The calibration is carried out using a 0.01 mol KCl solution. Use the calibration solution at a temperature between 18 °C and solution 30 °C and allow it to reach room temperature before use.

  • Page 45: Verification Of The Conductivity Sensor

    Chematest 42 Maintenance 10.9. Verification of the Conductivity Sensor Calibration The 0.01 mol KCl calibration solution can also be used for a verifica- tion measurement. solution Use the calibration solution at a temperature between 21 °C and 30 °C and allow it to reach room temperature before use.

  • Page 46: Cleaning The Conductivity Sensor

    Chematest 42 Maintenance 10.10. Cleaning the Conductivity Sensor To clean the conductivity sensor, proceed as follows: 1 Unscrew the protection sleeve [C]. Sensor shaft Sensing tip Protection sleeve 2 Clean the sensing tip [B] and the inner side of the protection sleeve [C] with a soft brush and a household detergent.

  • Page 47: Troubleshooting

    Chematest 42 Troubleshooting Troubleshooting 11.1. Instrument Errors When this symbol is displayed at the top of the screen, the instru- ment has an error. Navigate to <Menu>/<Diagnostics>/<Alarms>/ <Pending errors> to see the error message. Error Description Corrective action – Check if the installed firmware version...

  • Page 48: Photometric Measurements

    Chematest 42 Troubleshooting 11.2. Photometric Measurements Measurement Error message “Operation not possible! Consult the manual.” is displayed cannot be started Possible cause Corrective action  See Instrument Errors, p. 45 Error E002, E003 or E004 details. is present Zero measure- Error message “Operation not possible! Signal out of range.

  • Page 49: Turbidity Measurements

    Chematest 42 Troubleshooting 11.3. Turbidity Measurements Measurement Error message “Operation not possible! Consult the manual.” is displayed. cannot be started Possible cause Corrective action  See Instrument Errors, p. 45 Error E002, E003 or E004 details. is present Sensor failure Error message “Operation not possible! Sensor failure! Consult the...
  • Page 50 Chematest 42 Troubleshooting LED signal out Error message “Operation not possible! T signal out of range! Consult the manual.” is displayed. of range Possible cause Corrective action  Open the photometer compartment LED intensity too high or and clean all lenses, see...

  • Page 51: Sensor-Based Measurements

    Chematest 42 Troubleshooting 11.4. Sensor-Based Measurements Measurement Error message “Operation not possible! Consult the manual.” is displayed cannot be started Possible cause Corrective action  See Instrument Errors, p. 45 Error E002, E003 or E004 details. is present Sensor not Error message “Operation not possible! Sensor not connected!
  • Page 52 Chematest 42 Troubleshooting Sensor failure Error message “Operation not possible! Sensor failure! Consult the manual.” is displayed. Possible cause Corrective action  Call support. Cable or sensor defective  Do not unplug the sensor until The sensor was the measurement has been...

  • Page 53: Menu Explanations

    Chematest 42 Menu Explanations Menu Explanations Selecting <Menu> on the main screen displays the following submenus:  Menu 1 Data Storage  Menu 2 Diagnostics  Menu 3 Maintenance  Menu 4 Settings The functions and settings of each menu are explained in the follow- ing sections.
  • Page 54 Chematest 42 Menu Explanations Turbidity Cuvette check Displays previous cuvette checks. Each record includes the following data:  Date, time  Method (ISO/EPA)  Difference in FNU/NTU  User  Verification passed/failed Up to 64 cuvette checks are memorized. Then the oldest cuvette check is deleted to save the newest one.
  • Page 55 Chematest 42 Menu Explanations Turbidity Factor Displays previous factor calibrations. Each record consists of the following data:  Date. time  Factor  Method (ISO/EPA)  User  Calibration passed/failed Offset Displays previous offset calibrations. Each record consists of the following data: ...
  • Page 56  Advertising: The instrument is waiting for a connection request from another device.  Connected: A connection with another device has been established. Hardware address of the Chematest 42, which serves as a unique identification feature during Bluetooth communication. Firmware Firmware version of the Bluetooth module.
  • Page 57 Chematest 42 Menu Explanations 3 Maintenance 3.1 Verification Photometer Photometer Verification, p. Turbidity Cuvette check: See Check of Turbidity Cuvette, p. Verification: See Turbidimeter Verification, p. 3.2 Calibration Electrode pH: See Calibration of the pH Sensor, p. Redox/ORP: See Calibration of the Redox Sensor, p.
  • Page 58 Chematest 42 Menu Explanations 4 Settings 4.1 Sensors Photometer Enter the reference values of the verification cuvettes according to the enclosed calibration certificate. Range: 0.000–2.000 Electrode Filter time Used to damp noisy signals. The higher the filter time constant, the slower the system reacts to changes of the measured value.
  • Page 59 Chematest 42 Menu Explanations Electrode Redox/ORP Filter time Used to damp noisy signals. The higher the filter time constant, the slower the system reacts to changes of the measured value. constant Range: 5–300 s Standard Enter the mV value of the redox/ORP standard.
  • Page 60 Chematest 42 Menu Explanations Turbidity Method Select ISO or EPA. Method Verikits Enter the reference values from the certificates. Matching Starts the matching procedure. Verif. Criteria Maximum permissible deviation of a verification measurement from the value determined during the matching procedure.
  • Page 61 Chematest 42 Menu Explanations 4.3 Units Disinfectants Set the unit for disinfectants (all except ozone) and cyanuric acid. Disinfectants mg/l Ozone Set the unit for ozone. Ozone µg/l mg/l Temperature Set the unit for temperature. Temperature Celsius Fahrenheit Concentration Set the unit for concentration calculated from conductivity.
  • Page 62 Chematest 42 Menu Explanations 4.4 Miscellaneous Language Select the language from the list. The choice of languages varies de- pending on the installed language pack. Language pack Supported languages German, English, French, Spanish, Europe-1 Italian Danish, English, Swedish Europe-2 Portuguese, English, French,...
  • Page 63 Chematest 42 Menu Explanations Method save Defines the behavior of the favorites list on the main screen. For details, see Initial Setup, p. Method save  No: The favorites list remains unchanged when a method is selected from the method catalogue.

  • Page 64: Part Numbers

    Chematest 42 Part Numbers Part Numbers Download The current Material Safety Data Sheets (MSDS) for the reagents listed below are available for downloading at www.swan.ch. MSDS 13.1. Reagents Reagent sets Part no. Product name Allows measurement of  Free chlorine A-85.590.200...

  • Page 65: Accessories

    Chematest 42 Part Numbers Calibration Part no. Description solutions A-85.153.030 Turbidity calibration standard: 20 NTU/FNU A-85.119.010 pH calibration set consisting of:  1x pH buffer 7 (40 ml)  1x pH buffer 9 (40 ml) A-85.112.300 pH buffer 4 (40 ml) A-85.113.300...

  • Page 66: Spare Parts And Consumables

    Chematest 42 Part Numbers 13.3. Spare Parts and Consumables Part no. Description A-70.065.205 Carrying case for Chematest 35/42 A-70.065.634 Sensor storage container A-70.065.632 Cuvette adapter P/T CT3x/42 A-70.065.635 Cuvette CT, type P, glass A-70.065.636 Cuvette CT, type P, glass, 10x A-70.065.637...

  • Page 67: Technical Data

    Chematest 42 Technical Data Technical Data 14.1. Instrument Specifications Housing IP67 rated Power supply Rechargeable lithium-ion battery. Only charge the instrument using a standard type A USB socket and the supplied USB cable. Protect from heat and splash water during charging (not IP67).

  • Page 68: List Of Photometric Methods

    Chematest 42 Technical Data 14.2. List of Photometric Methods Method Range Issued values Chlorine  Free chlorine 0–10 ppm Free chlorine  Total chlorine 0–10 ppm Total chlorine  Combined chlorine 0–10 ppm Free chlorine (fac), total chlorine (tc), using one cuvette combined chlorine (cc) ...

  • Page 69: Nephelometry Specifications

    Chematest 42 Technical Data 14.3. Nephelometry Specifications Methods ISO 7027-1 US EPA 180.1 alternate procedure (registration pending) Measuring 0.00–1000 FNU/NTU range Limit of 0.01 FNU/NTU detection ISO 7027-1 Range 0.00–9.99 10.0–99.9 100–1000 Accuracy ± (LOD + 1.5 %) ± 1.5 % ±...

  • Page 70: Sensor Specifications

    Chematest 42 Technical Data 14.4. Sensor Specifications 14.4.1 pH and Redox Swansensor Measuring range: 1–13 Resolution: 0.01 pH CT Automatic temperature compensation with integrated sensor. DIN/ NIST or technical buffers. Swansensor Pt-redox electrode with integrated temperature sensor for consistent data records.

  • Page 71: Conductivity

    Chematest 42 Technical Data 14.4.2 Conductivity Swansensor Digital four-electrode sensor with Pt electrodes Insensitive to polarization effects Shurecon CT Measuring ranges/ 0.00–9.99 µS/cm resolution: 10.0–99.9 µS/cm 100–999 µS/cm 1.00–9.99 mS/cm 10.0–29.9 mS/cm 30–100 mS/cm Accuracy: ±(0.2 µS/cm ±1.5% of reading) Temperature range: 0–50 °C...

  • Page 72: Scope Of Supply

    Chematest 42 Technical Data 14.5. Scope of Supply Carrying case 2 cuvette adapters 2 blister packs for reagent Dropper bottle for rinsing bottles water 1 turbidity cuvette 2 sensor compartments (black coding ring) (sensors sold separately) Sensor storage container 4 photometry cuvettes...

  • Page 73: Appendix: Ct App

    Establish 1 Enable Bluetooth on the mobile device or PC. Connection 2 Enable Bluetooth on the Chematest 42 by navigating to <Settings>/<Bluetooth>/<Bluetooth> and selecting “Active”. 3 In the CT App, click on the <Connect device> button. 4 Select the instrument from the list and click on the <Pair> button.
  • Page 74 CT App main screen A Extract records Transfers the measurement history of the Chematest 42 to the CT App and exports it to a CSV or Excel file. Edit users Allows to modify the user list of the Chematest 42.
  • Page 75 Chematest 42 Language The menu languages of the Chematest 42 are organized in language packs that can be installed by the user via the CT App. packs  A language pack contains up to 5 languages.  One language pack can be installed at a time.
  • Page 76 Chematest 42 Regulatory Information This product contains a third party Bluetooth module, which has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. Contains FCC ID: T9JRN4020 This product meets all requirements of the relevant EU directives.
  • Page 77 Chematest 42 A-96.730.111 / 160124...
  • Page 78 Swan Products - Analytical Instruments for: Swan is represented worldwide by subsidiary companies and distributors and cooperates with independent representatives all over the world. For contact in- formation, please scan the QR code. Swan Analytical Instruments ∙ CH-8340 Hinwil www.swan.ch ∙ swan@swan.ch Chematest 42...

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