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Summary of Contents for Hach 1720E
- Page 1 Catalog Number 6010018 1720E Low Range Turbidimeter USER MANUAL 04/2016, Edition 8...
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Page 3: Table Of Contents
Table of Contents Section 1 Specifications............................3 Section 2 General Information ..........................5 2.1 Safety Information ............................... 5 2.1.1 Use of Hazard Information......................... 5 2.1.2 Precautionary Labels..........................5 2.1.3 General Product Information ........................5 2.2 Theory of Operation ............................6 Section 3 Installation .............................. - Page 4 Table of Contents Section 8 Replacement Parts and Accessories....................31 8.1 Replacement Items............................31 8.2 Optional Accessories............................31 8.3 Calibration and Verification Standards and Accessories ................... 32 Section 9 Compliance Information ........................33 Appendix A Modbus Register Information......................35...
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Page 5: Section 1 Specifications
Sensor Cable Length 1.8 m (5.9 ft); optional 7.62 m (25 ft) Mounting Options Turbidimeter Body and Head Assembly: Wall; floor stand 1720E Series 2 Turbidimeter and Controller: 6.31 kg (13.5 lb); 1720E Turbidimeter only: 4.71 Shipping Weight kg (10 lb) ®... -
Page 6: Specifications
Installation Environment Indoor Primary Compliance USEPA 180.1; Hach Method 8195; ASTM D 6698; Standard Methods 2130B Method Limit of Detection 0.0032 NTU (according to criteria specified by ISO 15839) All specifications are based on a calibration with 20.0 NTU formazin and with the offset turned off. -
Page 7: Section 2 General Information
Wastewater and the U.S. Environmental Protection Agency (EPA) and on StablCal ® which is also recognized as a primary standard. The 1720E Turbidimeter can be operated using an sc controller. Refer to the Operation section (Section 5 on page 15) for more information. -
Page 8: Theory Of Operation
General Information 2.2 Theory of Operation The 1720E Turbidimeter measures turbidity by directing a strong beam of collimated light from the sensor head assembly down into the sample in the turbidimeter body. Light scattered at 90° relative to the center line of incident light by suspended particles in the... -
Page 9: Section 3 Installation
Figure 2. Retain the connector cap to seal the connector opening in case the sensor must be removed. The 1720E sensor cable may be extended by a maximum of 7.62 m (25 ft), see Replacement Parts and Accessories on page... -
Page 10: Hard-Wiring A Sc Sensor To The Sc100 Controller
Installation 3.1.2 Hard-wiring a sc Sensor to the sc100 Controller 1. Disconnect power to the controller if powered. 2. Open the controller cover. 3. Disconnect and remove the existing wires between the quick-connect and terminal strip J5, see Figure 4. Remove the quick-connect fitting and wires and install the threaded plug on the opening to maintain the environmental rating. -
Page 11: Connecting The Sensor To The Sc1000 Controller
Installation Figure 3 Hard-wiring the Sensor DATA DATA DATA DATA DATA DATA DATA DATA – DATA – DATA – DATA – DATA SERVICE REQUEST SERVICE REQUEST SERVICE REQUEST SERVICE REQUEST OUT 2 OUT 2 OUT 2 OUT 2 OUT 2 OUT 2 OUT 2 OUT 2... - Page 12 Installation Figure 4 1720E Dimensions...
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Page 13: Mounting The Turbidimeter Body
Installation 3.3.1 Mounting the Turbidimeter Body Locate the turbidimeter as close to the sampling point as possible. A shorter distance for the sample to travel results in a faster response time. Clean the turbidimeter body and bubble trap before installation using the instructions supplied in section 6.4.2 on page 24. -
Page 14: Sample Connections
Installation Figure 5 Sampling Techniques Sample Flow Sediment (Typical) Good Sampling Line to Sensor Poor Best Air (Typical) Poor 3.5 Sample Connections Sample inlet and drain connections are made on the turbidimeter body. The sample inlet fitting installed in the body is a ¼-inch NPT ¼-inch compression fitting. -
Page 15: Section 4 System Startup
Section 4 System Startup 4.1 General Operation Plug the sensor into the unpowered controller by aligning the orientation tab on the cable connector with the channel in the controller connector. Push in and turn to secure the connection. Tug gently to check the connection. After all plumbing and electrical connections have been completed and checked, place the head on the body and supply power to the system. - Page 16 System Startup...
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Page 17: Section 5 Operation
Section 5 Operation 5.1 Sensor Setup When a sensor is initially installed, the serial number of the sensor will be displayed as the sensor name. To change the sensor name refer to the following instructions: 1. Select Main Menu. 2. From the Main Menu, select SENSOR SETUP and confirm. 3. -
Page 18: Sensor Setup Menu
Stabilized Formazin. Two verification methods (wet and dry) are also offered. The 1720E Turbidimeter is factory-calibrated using StablCal Stabilized Formazin before shipment. The instrument must be recalibrated before use to meet published accuracy specifications. In addition, recalibration is recommended after any significant maintenance or repair and at least once every three months during normal operation. -
Page 19: User-Prepared Calibration
Operation • Stop sample flow, drain, and clean the turbidimeter body before beginning the calibration procedure. • Always clean the photocell window per the instructions in section 6.4.1 on page Rinse the photocell with deionized water and dry with a soft, lint-free cloth before calibrating. -
Page 20: Calibration With Stablcal
Operation 9. Stop the sample flow. Drain and clean the body and bubble trap. Fill the cylinder with 1 L deionized water. Replace the head and confirm. Important Note: Carefully pour the DI water in such a way that minimizes any bubble formation that would result in a false, high reading. -
Page 21: Instrument Verification
Operation serial number). As long as the verification exists within the verification history, the expected value will be retained. Otherwise, the expected value will be the nominal value associated with the dry verification device. 10. Select the VERIFICATION type (begin at step 5 in section 5.5.3.1 on page 19 for dry verification or... -
Page 22: Calibration And Verification History
Operation 4. Select PERFORM TEST and confirm. Select the available Output Mode (Active, Hold, or Transfer) from the list box and confirm. 5. Select WET for the verification type and confirm. 6. Enter the Std Turbidity and confirm. 7. Drain and clean the sensor body and confirm. 8. -
Page 23: Setting The Offset
Note: The data log for this channel will be erased if the offset is changed to anything other than zero. 1. From the Main Menu select SENSOR SETUP and confirm. 2. Select 1720E and confirm. 3. Select CONFIGURE and confirm. - Page 24 Operation...
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Page 25: Section 6 Maintenance
Calibrate Sensor (as required by regulatory Per agency-dictated schedule. agency) Scheduled periodic maintenance requirements of the 1720E are minimal and include calibration and cleaning of the photocell window, bubble trap, and body. Check and clean the bubble trap and turbidimeter body (as described in section 6.4.2) if visual inspection... -
Page 26: Cleaning
Sediment may collect in the turbidimeter body after extended use. Noise (fluctuation) in the reading could indicate the need to clean the body and/or bubble trap. The 1720E bubble trap and bottom plate may be removed to make cleaning easier. Drain and clean the turbidimeter body before each calibration. -
Page 27: Replacing The Lamp Assembly
13. Restore sample flow to the instrument. 6.4.3 Replacing the Lamp Assembly The Lamp Assembly is located on the head assembly. Under normal use, Hach recommends replacing the lamp once a year to maintain peak performance. Replacement bulbs have been “burned-in” at the factory and are ready for installation and use. - Page 28 Maintenance 3. After the bulb has cooled, remove as follows: a. Wear cotton gloves to protect your hands and to avoid fingerprints on the bulb. b. Grasp the bulb. c. Twist the bulb in a counterclockwise direction, pulling out slightly, until it is released from the housing.
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Page 29: Section 7 Troubleshooting
Section 7 Troubleshooting 7.1 Error Codes When a sensor is experiencing an error condition, the sensor reading on the measurement screen will flash and all relays and analog outputs associated with the sensor will be held. Highlight the Probe Diag menu and press . -
Page 30: Troubleshooting
Troubleshooting Table 5 presents sensor warnings displayed in the Event Log, possible causes, and corrective actions. Table 5 General Troubleshooting Sensor Warning Possible Cause Corrective Action Lamp burned out Replace the lamp. See section 6.4.3 on page Lamp unplugged Restore connection Bad Lamp +12 V connection loose at controller Restore connection... -
Page 31: Event Codes
Troubleshooting Table 6 Additional Malfunctions Not Recorded in the Event Log (continued) Symptom Possible Cause Corrective Action High Readings Deionized water turbidity is greater than Clean the instrument. 0.5 NTU Access Calibration History for turbidity value of ultra-filtered water. Verify the flow is between 200–750 mL/min. Recalibrate the instrument. - Page 32 Troubleshooting...
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Page 33: Section 8 Replacement Parts And Accessories
Section 8 Replacement Parts and Accessories 8.1 Replacement Items Description Catalog Number Lamp Assembly each 18950-00 Instruction Manual, 1720E Turbidimeter System, English each 60100-18 8.2 Optional Accessories Description Catalog Number Cable, sensor extension, 7.7 m (25 ft) each 57960-00 Cap, Connector Receptacle... -
Page 34: Calibration And Verification Standards And Accessories
Replacement Parts and Accessories 8.3 Calibration and Verification Standards and Accessories Description Catalog Number Calibration Cylinder each 44153-00 Formazin Calibration Standards, Formazin, 4000 NTU Stock Solution 500 mL 2461-49 Calibration/Verification Modules ICE-PIC™ Module, 1 NTU 1 each 52215-00 ICE-PIC™ Module, 20 NTU 1 each 52250-00 ®... -
Page 35: Section 9 Compliance Information
Section 9 Compliance Information Hach Co. certifies this instrument was tested thoroughly, inspected and found to meet its published specifications when it was shipped from the factory. The Model sc100/sc1000 with 1720E Sensor has been tested and is certified as... - Page 36 2. If the Controller is connected into the same outlet as the device with which it is interfering, try another outlet. 3. Move the Controller and 1720E sensor away from the device receiving the interference. 4. Reposition the device receiving the interference.
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Page 37: Appendix A Modbus Register Information
Appendix A Modbus Register Information Table 8 Sensor Modbus Registers Register Data Group Name Tag Name Length Units (U) Range Type Measurements Cal Gain 40013 float none 0.5 to 2.0 Verification PF Criteria 40062 Integer 5 to 10 Measurements Turbidity 40001 Float 0/100... - Page 38 Modbus Register Information...
- Page 39 Index Numerics 90 Degree Detector ............ 6 Photocell Window ............ 24 Power Requirements ..........3 Accuracy ..............3 Range ................ 3 Response Time ............3 Bubble trap ..............6 Safety Information ............5 Calibration ..............16 Sample History ............... 20 Connections ............
- Page 40 Index...
- Page 42 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, 2003–2007, 2016. All rights reserved. Printed in U.S.A.
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Questions and answers
I'm only getting .. .. for my reading on my 1720e turb meter. The light bulb is new and working. not sure what to do.
If your Hach 1720E turbidity meter is displaying ".. .." despite having a new working light bulb, follow these troubleshooting steps:
1. Check for Light Path Obstruction – Ensure nothing is blocking the light path inside the turbidimeter.
2. Inspect the Lamp Installation – Verify that the new lamp is correctly installed and making proper contact.
3. Check for Improper Wiring – Ensure all connections at the controller and turbidimeter head are correct.
4. Verify System Voltage – Fluctuations in voltage may cause display issues. Restart the instrument to reset it.
5. Check for Circuit Board Issues – If problems persist, the circuit board in the turbidimeter head may be faulty.
6. Look for a Light Leak – Ensure the turbidimeter head is properly aligned with the body or calibration cylinder.
7. Perform Zero Electronics Calibration – Run the ZERO ELECTRONICS function in the CALIBRATION MENU.
8. Check the Photocell – If broken or cracked, the photocell may need replacement.
If the issue continues, contact the Customer Service Department for further assistance.
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I have a blinking red light on my 1720E-1V. I have a green light on where it says ready. Blinking red light where it says status. I was just wondering what that means what it means when its blinking.