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Hach Surface Scatter 7 sc User Manual
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Hach Surface Scatter 7 sc User Manual

Hach Surface Scatter 7 sc User Manual

Turbidimeter
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DOC026.53.00769
Surface Scatter 7 sc
Turbidimeter
02/2025, Edition 5
User Manual

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Summary of Contents for Hach Surface Scatter 7 sc

  • Page 1 DOC026.53.00769 Surface Scatter 7 sc Turbidimeter 02/2025, Edition 5 User Manual...

  • Page 3: Table Of Contents

    Table of Contents Section 1 Specifications ..................3 Section 2 General information ................3 2.1 Safety information ....................4 2.1.1 Use of hazard information ................4 2.1.2 Precautionary labels ................... 4 2.1.3 EMC compliance ..................4 2.2 Icons used in illustrations ..................5 2.3 Product overview ....................
  • Page 4 Table of Contents 9.1 Errors ......................... 30 9.2 Warnings ......................30 9.3 Events ........................ 32 9.4 Instrument information ..................33 Section 10 Replacement parts and accessories ........34 Section 11 Modbus registers ................35...

  • Page 5: Section 1 Specifications

    Standardization plates (100 or 1000 NTU). Standardization plate is measured immediately after calibration and used as a secondary turbidity standard. Primary compliance methods USEPA 180.1; Hach Method 8195; ASTM D 6698; Standard Methods 2130B Certifications CE Mark, EMC per IEC CISPR 11/ EN 55011, FCC, ISED...

  • Page 6: Safety Information

    2.1 Safety information The manufacturer is not responsible for any damages due to misapplication or misuse of this product including, without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent permitted under applicable law. The user is solely responsible to identify critical application risks and install appropriate mechanisms to protect processes during a possible equipment malfunction.

  • Page 7: Icons Used In Illustrations

    Cet appareil numérique de classe A répond à toutes les exigences de la réglementation canadienne sur les équipements provoquant des interférences. FCC Part 15, Class "A" Limits Supporting test records reside with the manufacturer. The device complies with Part 15 of the FCC Rules.
  • Page 8 The Surface Scatter 7 sc (SS7 sc) turbidimeter continuously measures the turbidity in liquids. The instrument design is based on the nephelometric principle, where light scattered by particles suspended in the liquid is measured to determine the relative quantity of particulate matter in the liquid.
  • Page 9 Figure 1 SS7 sc turbidimeter 1 Detector assembly 5 Bulkhead fitting, 1-inch NPT 2 Light source assembly 6 Bulkhead fitting, ¾-inch NPT 3 Instrument cable, 2 m (6.6 ft) 7 Turbidimeter 4 Cable gland English 7...

  • Page 10: Theory Of Operation

    Figure 2 Optical diagram 1 Detector assembly 5 Light beam 9 Instrument drain (usually closed) 2 Scattered light 6 Sample overflow 10 Refracted light 3 Lens 7 Sample overflow drain 11 Turbidimeter 4 Lamp 8 Sample in 12 Reflected light 2.4 Theory of operation The SS7 sc measures the light scattered by particles in the sample.

  • Page 11: Product Components

    3. If any items are missing or damaged, contact the manufacturer or a sales representative immediately. Figure 3 Product components 1 Surface Scatter 7 sc turbidimeter 6 Rubber washers, ¼-inch ID x 1-inch OD (4x) 2 Formazin stock solution, 4000 NTU, 500 mL 7 Adapter, barb fitting, ¾-inch NPT to ¾-inch ID...

  • Page 12: Dimensions

    • Keep away from dripping water. 3.2 Dimensions 10 English...

  • Page 13: Attach The Instrument To A Wall

    3.3 Attach the instrument to a wall 1. Attach the instrument to a wall. The mounting hardware is supplied by the user. Refer to Figure 2. Open the instrument door. 3. Make sure that the instrument does not tilt left-to-right or front-to-back. Refer to Figure Figure 4 Attach the instrument to a wall English 11...

  • Page 14: Plumbing

    Figure 5 Use a leveling tool 1 Leveling tool 3.4 Plumbing 3.4.1 Sample line guidelines Select a good, representative sample line point for the best instrument performance. The sample must be representative of the entire system. Select a sample line diameter that keeps the lag time to a minimum, but also keeps the blockages caused by the solids in the sample to a minimum.

  • Page 15: Install A Bubble Trap Head Regulator (Optional)

    Figure 6 Sample line taps 1 Air (typical) 2 Sediment (typical) 3.4.2 Install a bubble trap head regulator (optional) If the sample cannot be supplied without bubbles, install the optional bubble trap head regulator. Refer to Figure 7 on page 14. Refer to Replacement parts and accessories on page 34 for ordering information.

  • Page 16: Connect An Air Purge (Optional)

    Figure 7 Plumbing diagram 1 Sample in 7 Adapter, barb fitting, ¾-inch NPT to ¾-inch ID tubing 2 Flow control valve (customer supplied) 8 To drain 3 Adapter, ¾-inch NPT x ¾-inch ID tubing (supplied 9 Air purge fitting, ¼-inch (instrument air, 50 SCFH with the bubble trap) maximum) 4 Bubble trap/head regulator (optional)

  • Page 17: Electrical Installation

    3.5 Electrical installation 3.5.1 Connect the controller to power Connect the controller to line power by hard-wiring in conduit or wiring to a power cord. Refer to the controller documentation for instructions. 3.5.2 Connect the instrument to the controller Connect the instrument cable to a digital input connector on the controller. Refer to Figure Keep the connector cap to seal the connector opening in case the cable must be removed.

  • Page 18: Section 5 Configuration

    9. Wait for the reading on the controller to become stable (1 to 2 hours can be necessary). Do not configure or calibrate the instrument before the readings are stable. 10. When the readings are stable, do the steps in Configure the instrument settings on page 16, then the steps in...

  • Page 19: Calibrate With A Lab Instrument

    6.1 Calibrate with a lab instrument The easiest way to calibrate the instrument is with a lab instrument. Measure the turbidity of the process sample with a lab instrument that has been calibrated. Then, enter the measured value. The measured value must 2 NTU or more to calibrate with a lab instrument. 1.
  • Page 20 Dilutions of the Formazin stock solution are not stable and should be used immediately, then discarded after use. 1. Drain the instrument as follows: a. Close the sample valve to stop the flow of sample to the instrument. b. Open the instrument drain valve. c.

  • Page 21: Show The Calibration History

    17. Drain the instrument as follows: a. Open the instrument drain valve. b. Close the instrument drain valve after the instrument is drained. 18. Remove the calibration cup. 19. Close the instrument door. 20. Close all of the door latches. 21.

  • Page 22: Section 7 Verification

    The output signals are held when the electrical zero point is set. 1. Go to the calibration menu: • SC4500 Controller—Select the tile of the device, then select Device menu > Calibration. • SC200 and SC1000 Controllers—Go to the main menu, then select SENSOR SETUP > [select instrument] >...

  • Page 23: Do A Verification

    17. Adjust the sample flow rate with the sample valve. Refer to the sample specifications in Specifications on page 3. 18. Push OK (or enter) to go to measurement mode. Note: The instrument will complete a 2-minute cycle and then go to measurement mode. Measurements will show on the display, but the measurement value will flash, the output signal will not change and "Output mode warning"...

  • Page 24: Clean The Standardization Plate

    15. Remove the standardization plate. 16. Close the instrument door. 17. Close all of the door latches. 18. Slowly open the sample valve. 19. Adjust the sample flow rate with the sample valve. Refer to the sample specifications in Specifications on page 3.

  • Page 25: Section 8 Maintenance

    Section 8 Maintenance W A R N I N G Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the document. D A N G E R Electrocution hazard. Remove power from the instrument before doing maintenance or service activities.
  • Page 26 8. Install the light source assembly as follows: a. Install the two screws that hold the lamp source assembly to the back plate. b. Connect the lamp cable. Put the two halves of the lamp cable connector together. 9. Make sure that the light source assembly is positioned correctly as follows: a.
  • Page 27 Figure 10 Lamp replacement 1 Lamp cable 4 Back plate 2 End plate 5 Light source assembly 3 Notched spacer 6 Lamp English 25...
  • Page 28 Figure 11 Lamp alignment 1 Flat notch 5 Light source assembly 2 Light alignment template 6 Screws that secure the light source assembly to the backplate 3 Calibration cup 7 Target area 4 Turbidimeter 26 English...

  • Page 29: Light Source Assembly Maintenance

    8.3 Light source assembly maintenance No maintenance of the light source assembly is usually necessary, except for the lamp replacement. If the components of the light source assembly are removed, the components must be installed back in the correct position and orientation or the measurements will not be correct. Figure 12 shows the correct position and orientation of the components.

  • Page 30: Replace The Detector Assembly

    8.4 Replace the detector assembly Replace the detector assembly as identified in Errors on page 30 and Warnings on page 30. 1. Record the controller settings for the analog outputs or relays used with the instrument, if applicable. 2. Remove power from the controller. 3.

  • Page 31: Section 9 Troubleshooting

    Figure 13 Replace the detector assembly 1 Detector assembly 5 Black nut 9 Grey nut 2 Lamp cable connector 6 Cable gland 10 Instrument cable 3 Cable clamp 7 Clamping fingers 4 Blunt object 8 Split grommet Section 9 Troubleshooting Problem Possible cause Solution...

  • Page 32: Errors

    Problem Possible cause Solution Erratic readings There are bubbles in the sample. Examine the value and expiration date on the calibration standard. Calibrate the instrument. Increase the Signal average (or SIGNAL AVG) setting. Make sure that the Bubble rejection status (or BUBBLE REJECT) setting is set to on.
  • Page 33 A list of possible warnings is shown in Table Table 2 Warning messages Warning Description Solution Dark warning The dark reading measured too much Close the instrument door and all of the (or DARK WARNING) light. door latches before power is supplied to the controller or when "Electronical zero point (or 0 ELECTRONICS)"...

  • Page 34: Events

    9.3 Events Events are saved to the event log and are not shown on the controller. Refer to the controller documentation for instructions on how to download the event log. Table 3 shows the events that are logged. Table 3 Event list Event Event # Data1...

  • Page 35: Instrument Information

    Table 3 Event list (continued) Event Event # Data1 Data2 Data3 Appcode update start — — — (or AC UPDATE STRT) Appcode update done — — — (or AC UPDATE DONE) Appcode update failed — — — (or AC UPDATE FAIL) Appcode internal failed —...

  • Page 36: Section 10 Replacement Parts And Accessories

    Section 10 Replacement parts and accessories W A R N I N G Personal injury hazard. Use of non-approved parts may cause personal injury, damage to the instrument or equipment malfunction. The replacement parts in this section are approved by the manufacturer.

  • Page 37: Section 11 Modbus Registers

    Section 11 Modbus registers Use the Modbus registers in the control system to configure and get data from the instrument. Refer Table R = Read only R/W = Read and write Table 4 Modbus registers Tag Name Register Data type Length R/W Description Turbidity 40001 Float...
  • Page 38 Table 4 Modbus registers (continued) Tag Name Register Data type Length R/W Description Serial number 40021 String Serial number of the instrument (or SERIAL NUMBER) Software version 40027 Float Software version installed (or SW VERS) DD firmware 40029 Integer Firmware version of the device driver (or DD FIRMWARE) DD content 40030...
  • Page 40 Tel. +49 (0) 2 11 52 88-320 SWITZERLAND Fax (970) 669-2932 Fax +49 (0) 2 11 52 88-210 Tel. +41 22 594 6400 orders@hach.com info-de@hach.com Fax +41 22 594 6499 www.hach.com www.de.hach.com © Hach Company/Hach Lange GmbH, 2006, 2024-2025. All rights reserved. Printed in Germany.