HACH NT3100sc UV Nitrate Sensor User Manual

HACH NT3100sc UV Nitrate Sensor

Specifications

Specifications are subject to change without notice.
The product has only the approvals listed and the registrations, certificates and declarations officially provided with the product. The usage of this product in an application for which it is not permitted is not approved by the manufacturer.

NT3200sc: Sludge compensated, 3-channel beam path
Measuring path| 1 mm (0.04 inches), 2 mm (0.08 inches) or 5 mm (0.20
inches)
Measuring range| NT3100sc:
NT3200sc:
Accuracy2|
Resolution| 0.01 to 999.99
Sludge compensation| Yes
Measuring interval| 15, 30 seconds, 1, 5, 10, 30 minutes
Units| mg/L, ppm
T100 response time| 1 minute
Signal average| 1 to 12 measurements
Power consumption| 9 W
Cable length| 10 m (33 ft)
Extension cables| 5, 10, 15, 20, 30 and 50 m. Maximum cable length: 60 m (190
ft)
Environmental rating| IP 68
Sensor pressure limit| 0.5 bar (7.3 psi)
Ambient temperature|
Sample temperature|
Weight| 4.8 kg (10.6 lb) with 10 m cable
Altitude| 2000 m (6562 ft) maximum
Pollution degree| 2
Overvoltage category| III
Environmental conditions| Outdoor use
Sensor materials| Enclosure: Stainless steel
Enclosure seals: Silicone
Wiper shaft, arm (5 mm) and wiper blade carrier (1 mm and 2 mm):
Stainless steel
Wiper blade: Silicone
Measuring window: Quartz glass
Sensor cable: Polyurethane (PUR)
Cable gland: Stainless steel
Seal cable gland: Silicone HT
Process connection| Immersion directly in media
Bypass with flow through unit
Sedimenter
Certifications| CE, CMIM and UKCA approved, FCC, ISED
Warranty| 1 year (EU: 2 years)
Specification| Details
---|---
Measuring principle| UV absorption measurement, reagent-free
Measuring method| NT3100sc : Sludge compensated, 2-channel beam path
NT3200sc : Sludge compensated, 3-channel beam path
Measuring path1| 1 mm (0.04 inches), 2 mm (0.08 inches) or 5 mm (0.20 inches)
Measuring range| NT3100sc| NT3200sc
1 mm path: 0.1 to 90 mg/L NO3–N| 1 mm path: 0.3 to 70 mg/L NO3–N, 0.4 to 92 mg/L NO2–N
2 mm path: 0.05 to 50 mg/L NO3–N| 2 mm path: 0.15 to 34 mg/L NO3–N, 0.15 to 61 mg/L NO2–N
5 mm path: 0.02 to 25 mg/L NO3–N| 5 mm path: 0.07 to 17 mg/L NO3–N, 0.06 to 23 mg/L NO2–N
Limit of detection (LOD)2| 1 mm path: 0.1 mg/L NO3–N| 1 mm path: 0.3 mg/L NO3–N, 0.4 mg/L NO2–N
2 mm path: 0.05 mg/L NO3–N| 2 mm path: 0.15 mg/L NO3–N, 0.15 mg/L NO2–N
5 mm path: 0.02 mg/L NO3–N| 5 mm path: 0.07 mg/L NO3–N, 0.06 mg/L NO2–N,
Accuracy 2| 1 mm path: ± 5% of the measured value ± 0.1 mg/L NO3–N| 1 mm path: ± 4% of the measured value ± 0.6 mg/L NO3–N, ± 4% of the measured value ± 0.6 mg/L NO2–N
2 mm path: ± 4% of the measured value ± 0.1 mg/L NO3–N < 22 mg/L, ±5 % of the measured value ± 0.1 mg/L NO3–N ≥ 22 mg/L| 2 mm path: ± 3% of the measured value ± 0.3 mg/L NO3–N, ± 3% of the measured value ± 0.2 mg/L NO2–N
5 mm path: ± 3% of the measured value ± 0.05 mg/L for NO3–N ≤ 5 mg/L, ± 3% of the measured value ± 0.1 mg/L for 5 mg/L < NO3–N < 13 mg/L, ± 5% of the measured value ± 0.1 mg/L for NO3–N ≥ 13 mg/L| 5 mm path: ± 3% of the measured value ± 0.1 mg/L NO3–N, ± 5% of the measured value ± 0.15 mg/L NO2–N ≤ 6 mg/L, ± 5% of the measured value ± 0.24 mg/L NO2–N > 6 mg/L

1. Based on the probe version
2. Measured with mono standard solution NO3–N for NT3100sc and with mono standard solutions NO3–N and NO2–N for NT3200sc under laboratory conditions.

Extension cables are available: 5, 10, 15, 20, 30 and 50 m. The maximum cable length is 60 m (190 ft).
Environmental rating| IP 68
Sensor pressure limit| 0.5 bar (7.3 psi)
Ambient temperature| 2 °C to 40 °C (36 °F to 100 °F), 95% relative humidity, non-condensing
Sample temperature| 2 °C to 40 °C (36 °F to 100 °F), 95% relative humidity, non-condensing
Dimensions (Ø x L)| 70 × 470 mm (3 × 18.5 inches) approximately
Weight| 4.8 kg (10.6 lb) with 10 m cable
Altitude| 2000 m (6562 ft) maximum
Pollution degree| 2
Overvoltage category| III
Environmental conditions| Outdoor use
Sensor material| Enclosure: Stainless steel Enclosure seals: Silicone
Wiper shaft, arm (5 mm) and wiper blade carrier (1 mm and 2 mm): Stainless steel Wiper blade: Silicone
Measuring window: Quartz glass Sensor cable: Polyurethane (PUR) Cable gland: Stainless steel Seal cable gland: Silicone HT
Process connection| Immersion directly in media Bypass with flow through unit Sedimenter
Certifications| CE, CMIM and UKCA approved, FCC, ISED
Warranty| 1 year (EU: 2 years)

Section 2 General information

In no event will the manufacturer be liable for damages resulting from any improper use of product or failure to comply with the instructions in the manual. The manufacturer reserves the right to make changes in this manual and the products it describes at any time, without notice or obligation. Revised editions are found on the manufacturer’s website.

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. Please read this entire manual before unpacking, setting up or operating this equipment. Pay attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment. Make sure that the protection provided by this equipment is not impaired. Do not use or install this equipment in any manner other than that specified in this manual.

Use of hazard information
DANGER
Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING
Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION
Indicates a potentially hazardous situation that may result in minor or moderate injury.

NOTICE
Indicates a situation which, if not avoided, may cause damage to the instrument. Information that requires special emphasis.

Precautionary labels
Read all labels and tags attached to the instrument. Personal injury or damage to the instrument could occur if not observed. A symbol on the instrument is referenced in the manual with a precautionary statement.

| This symbol, if noted on the instrument, references the instruction manual for operation and/or safety information.
---|---
| Electrical equipment marked with this symbol may not be disposed of in European domestic or public disposal systems. Return old or end-of-life equipment to the manufacturer for disposal at no charge to the user.
| This symbol indicates that a risk of electrical shock and/or electrocution exists.
| This symbol indicates the need for protective eye wear.
| This symbol indicates that the marked item requires a protective earth connection. If the instrument is not supplied with a ground plug on a cord, make the protective earth connection to the protective conductor terminal.
| This symbol, when noted on the product, identifies the location of a fuse or current limiting device.
---|---
| This symbol indicates the presence of a UV light source that may cause eye and skin injury. Wear appropriate protective equipment and obey all safety protocols.

Chemical and Biological Safety
DANGER
Chemical or biological hazards. If this instrument is used to monitor a treatment process and/or chemical feed system for which there are regulatory limits and monitoring requirements related to public health, public safety, food or beverage manufacture or processing, it is the responsibility of the user of this instrument to know and abide by any applicable regulation and to have sufficient and appropriate mechanisms in place for compliance with applicable regulations in the event of malfunction of the instrument.
Normal operation of this device may require the use of chemicals or samples that are biologically unsafe.

• Observe all cautionary information printed on the original solution containers and safety data sheets prior to their use.
• Dispose of all consumed solutions in accordance with the local and national regulations and laws.
• Select the type of protective equipment suitable to the concentration and quantity of the dangerous material being used.

Compliance and certification
CAUTION
This equipment is not intended for use in residential environments and may not provide adequate protection to radio reception in such environments.

Canadian Radio Interference-Causing Equipment Regulation, ICES-003, Class A:
Supporting test records reside with the manufacturer. This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

FCC Part 15, Class “A” Limits
Supporting test records reside with the manufacturer.  The device complies with Part 15 of the FCC Rules.

Operation is subject to the following conditions:

1. The equipment may not cause harmful interference.
2. The equipment must accept any interference received, including interference that may cause undesired operation.

Changes or modifications to this equipment not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This equipment has been tested and found to comply with the limits for a 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 communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at their expense. The following techniques can be used to reduce interference problems:

1. Disconnect the equipment from its power source to verify that it is or is not the source of the interference.
2. If the equipment is connected to the same outlet as the device experiencing interference, connect the equipment to a different outlet.
3. Move the equipment away from the device receiving the interference.
4. Reposition the receiving antenna for the device receiving the interference.
5. Try combinations of the above.

Icons used in illustrations

| | | |
---|---|---|---|---
Manufacturer supplied parts| Mandatory action| Do not use tools| Do steps in reverse order| Do one of these options

Intended use
The NT3100sc and NT3200sc probes are intended for use by water treatment professionals to make sure that there is a consistently-low level of nitrate and nitrite in the municipal sewage at treatment plants, surface water, untreated water and treated drinking water. Low nitrate and nitrite levels prevent water toxicity exposure and/or make sure of regulatory compliance.

Theory of operation
Nitrate dissolved in water absorbs UV light with wavelengths below 250 nm. The nitrate and nitrite absorption of UV light makes it possible to photometrically determine the dissolved nitrate and nitrite concentrations without reagents. The sensor is put directly in the medium. The color of the medium does not have an effect on the measurement because the measuring principle is based on the analysis of invisible UV light.

Product overview

Use the NT3100sc probe to measure nitrate concentrations and the NT3200sc probe to measure nitrate and nitrite concentrations.

2 Measuring path with wiper

Use the probe in activated sludge tanks in municipal sewage treatment plants, surface water, untreated water and treated drinking water, or the outlet of wastewater treatment plants. Pumping and conditioning are not necessary. Put the probe directly into the medium.
Note: Use the flow through unit when direct measurement in the medium is not possible or it is necessary to measure a filtered sample (e.g., very high TSS3 content, sewage treatment plant inlet or waste dump leachate).
Connect the probe to an SC Controller for power, operation, data collection, data transmission and diagnostics. Refer to the SC Controller manual for an overview of the controller. The probe has a beam absorption photometer with turbidity compensation. A built-in wiper mechanically cleans the measuring window.
Note: Enable the sludge mode to increase the number of concentration measurements done when the probe measures in activated sludge. When sludge mode is active, several measurements are done to compensate for the different sludge compositions.
Dissolved nitrate and nitrite, dissolved organics and particles absorb light, which has an effect on the measurement absorbance value. The probe adjusts for this turbidity interference. However, there may be applications where the combination of these compounds absorbs too much light. Thus, there is not sufficient light transmitted to the sensors and inaccurate measurements occur. Make sure to select the probe with the correct pathlength. Refer to Table 1 and Table 2.

Recommended pathlength—NT3100sc nitrate probe

Wastewater
Influent| ✔| ✔|
Nitrification/denitrification| ✔| ✔|
Nitrification/denitrification, more than 5,000 mg TSS/L sludge| ✔| |
Effluent| | ✔| ✔
Drinking Water
Raw drinking water| | ✔| ✔
Finished water/distribution| | | ✔

Recommended pathlength—NT3200sc nitrate and nitrite probe4

Wastewater
Nitrification/denitrification| ✔5 (30 mg/L)| ✔ (5–10 mg/L)|
Nitrification/denitrification, more than 5,000 mg TSS/L sludge| ✔5 (25–30 mg/L)| ✔(5–10 mg/L)|
Anammox/nitritation mainstream| ✔ (10–30 mg/L)| |
Effluent| ✔5 (30–70 mg/L)| ✔6 (20 mg/L)| ✔ (5 mg/L)
Drinking Water
Finished water/distribution| ✔5 (45–68 mg/L)| ✔7 (15–20 mg/L)| ✔8 (5 mg/L)

Note: After the complete installation of the NT3200sc, especially in sludge, it is possible that invalid values occur, then the manufacturer recommends a matrix calibration. The matrix calibration makes sure to get a correct  measurement of the mixed NO2–N and NO3–N concentration. The matrix calibration will decrease the effect of the light absorption caused by the unwanted and dissolved organics. Refer to Matrix calibration on page 16.

• When nitrate and nitrite are in the sample, the accuracy of NO2–N and the maximum NOx–N concentrations decrease.
• Nitrite accuracy is limited.
• Nitrite accuracy is limited when NO3–N is more than 10 mg/L.
• Nitrite accuracy is limited when NO3–N is more than 18 mg/L.
• Only in low (approximately 0 mAbs/mm) UV absorbance matrix.

Product components
Make sure that all components have been received. Refer to Figure 2. If any items are missing or damaged, contact the manufacturer or a sales representative immediately.

for pole mount

Product Usage Instructions

Section 3: Installation
To install the product, follow these steps:

1. Choose a suitable location for the product.
2. Ensure that the product is placed on a stable surface.
3. Connect the necessary cables to the product.
4. If required, use extension cables to achieve the desired cable length.
5. Ensure that the process connection is properly set up according to your specific application.

CAUTION
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the document.

Installation guidelines

• Do not use stainless steel probes in sea water or other corrosion-causing media (e.g., acids, alkalis, chlorine-based compounds). Clean the probe immediately.
• Make sure that the measuring medium does not cause damage to the probe components.
• Do not replace the cable. If the cable has damage, contact the manufacturer.
• Make sure that the device cables do not cause a trip hazard and do not have sharp bends.
• Make sure that the cable is not routed near hot surfaces. Make sure not to put heavy objects on the cable.
• Make sure that there are no unwanted materials in the optical path.
• Immediately set the controller to OFF if the probe sends out smoke, noxious fumes or gets hot. Contact the manufacturer.

Installation overview

Figure 3 shows the probe installed with the optional bracket installation option. Figure 5 shows the probe installed with the optional flow through unit. Refer to the documentation supplied with the mounting hardware for more information.
Bracket installation

Sensor with flow through unit installation

Put the probe into the sample. Make sure that the optical path is fully immersed in the sample. Install the sensor transversally to the flow direction of the sample so the particle on the windows are at a minimum.
Flow direction (top view)

Note: Make sure that the probe does not touch the ground.

Connect the probe to the controller
Connect the sensor cable to the quick-connect fitting of the SC Controller. Keep the device connector caps for future use.

Refer to the controller documentation for more information. Note: Extension cables are available if a longer cable is necessary.

Section 4: Startup
To start using the product, follow these steps:

1. Ensure that the product is properly installed.
2. Connect the power supply to the product.
3. Wait for the product to initialize and perform self-tests.
4. Check the display or indicator lights to ensure that the
   product is ready for operation.

Section 5: Operation

To operate the product, follow these steps:

1. Ensure that the product is properly installed and started up.
2. Set the desired measuring path and range according to your requirements.
3. Select the appropriate units for measurement.
4. Adjust the measuring interval, if necessary.
5. Perform measurements by placing the sample in the designated area or following the specific instructions for your application.

User navigation
Note: Refer to the controller user manual for the keypad description and navigation information.

Configure the probe
Enter identification information, configure the measurement and change options for probe settings, data handling and storage.

1. Make sure that the controller has the latest software installed. Refer to the controller user manual for more information. (For the SC200 Controller, the minimum version is 2.06.)

2. Go to the device menu as follows:

   • SC200 and SC1000 Controllers—Go to the main menu, then select Sensor setup. If applicable, select the sensor.
     Note: For older versions of the SC200 controller, select the Single measurements only setting.

   • SC4500 Controller and Claros interface—Select the tile of the device, then select Device menu.

3. Select Configuration.

4. Select an option.
   Note: The options that follow can show some differences in different controllers.

Wiper in position B

Calibration
Offset, factor and standard calibration
Use the offset and/or factor calibration option when the process water contains solids (e.g., activated sludge). Use the standard calibration option for clean samples.

1. Go to the device menu as follows:
   • SC200 and SC1000 Controllers—Go to the main menu, then select Sensor setup. If applicable, select the sensor.
   • SC4500 Controller and Claros interface—Select the tile of the device, then select Device menu.
2. Select Calibration. If applicable, select the parameter.
3. Select an option.

Matrix calibration
The matrix calibration is only available for the NT3200sc probe and can have one, two or three calibration points. The matrix calibration adapts the calculation for nitrate and nitrite to the conditions in the medium. A matrix calibration is based on a laboratory comparison measurement. Start the matrix calibration after the probe is in the medium and has adapted to the environment. Wait a minimum of 15 minutes with the default configuration settings to let the probe adjust to the temperature, complete some wiping cycles to clean the measurement gap and remove air bubbles. The matrix calibration is necessary to adjust the measurements to the background environment. If a single calibration point is used, it is recommended to select the calibration point at the lower limit of the operating range of the application. For two calibration points, select the calibration points at the lower and upper limit of the operating range. If a third calibration point is used, set the third calibration point in the middle of the operating range.

The limit of the operating range depends on the application:

• If the nitrate concentration changes and nitrite is almost constant, set the limit to the lowest and highest NO3 concentration.
• If the nitrite concentration changes and nitrate is almost constant, set the limit to the lowest and highest NO2 concentration.
• If the nitrate and nitrite concentrations change, set the limit to the lowest and highest NO3 concentration.

If one more calibration point is added, the probe knows automatically which of the three calibration points needs to be rewritten. Each calibration point is shown in Matrix calibration > Information and can be deleted manually.

If one of the events that follows occurs, delete all of the existing calibration points and record new calibration points:

• The probe is moved to a different environment
• The matrix changes significantly
• The matrix changes seasonal
• The process changes
• Comparison measurements with laboratory values are not matching
• An error message shows that a matrix calibration is necessary

Note: Doing or erasing a matrix calibration does not have an effect on the factory calibration.

Make sure that the steps are followed for each calibration procedure:

• The probe is in the medium and has adapted to the environment.

• Collect the grab sample, then immediately validate on the controller that the grab sample was collected.

• Collect the sample as near as possible to the sensor.

• Start the matrix calibration only when the concentrations are stable.

• To measure the grab sample, refer to Instructions for laboratory measurements on page 26.

  1. Go to the main menu, then select Calibration > Matrix calibration > Start matrix calibration. Note: There can be one, two or three open matrix calibration points. One of the three open calibration points must be deleted before a new calibration point can be added.

  2. Immediately follow the instructions on the controller to collect a grab sample. Accept the message immediately after the grab sample is collected. Write the shown Point ID to the sample. Prepare the grab sample (e.g., filtration) as soon as possible for laboratory measurement.
     Note: The measurement data is initially saved on the controller for the probe, then adjusted when the laboratory values are determined and entered.

  3. Measure the grab sample in the laboratory with the two parameters: NO3–N and NO2–N or NO3 and NO2.

  4. Select Calibration > Matrix calibration > Edit open calibration points.
     Note: The Edit open calibration points option only shows when the Matrix calibration is started.
     Note: Make sure that the chemical formulas of the sensor and laboratory measurements are the same (e.g., NO3–N and NO2–N or NO3 and NO2).
     The first open calibration point is shown.

  5. If several grab samples are collected without the laboratory values entered in between, use the Point ID to make sure that the assignment is correct.

  • To enter an open calibration point, confirm the open point and then select Enter lab values if the point ID matches the comparison measurement.
  • To delete an open calibration point, confirm the open point and then select Delete this point.

  6. Select Next to move to the next point. Select Back to complete the matrix calibration.

  7. Select Calibration > Matrix calibration > Information.
     Data about the actual matrix calibration shows.

  8. Select Calibration > Matrix calibration > Calibration interval to set a reminder for the Matrix calibration.
     Note: The calibration interval refers to the last completed matrix calibration.

If necessary, go back to the factory calibration. Select Calibration > Matrix calibration > Reset to default.

Correction via Link2sc
The Link2sc procedure offers a secure method of data exchange between process probes and Link2sc-compatible photometers using an SD memory card or via a local area network (LAN). During a pure control measurement, the measurement data is transferred from the probe to the photometer where it is then archived together with the photometric reference data that has been recorded.
Refer to the Link2sc user manual for a detailed description of the Link2sc procedure.

Data logging
The SC Controller provides one data log and one event log for each instrument. The data log stores the measurement data at selected intervals. The event log stores different types of events that occur on the devices (i.e., configuration changes, alarms and warning conditions). The data log and the event log can be saved. Refer to the SC Controller user manual for instructions.

Section 6: Maintenance

To maintain the product, follow these steps:

1. Regularly clean the sensor materials using appropriate cleaning agents.
2. Inspect the product for any signs of damage or wear.
3. Replace any worn-out or damaged parts with genuine replacement parts.
4. Keep the product and its surroundings clean and free from debris.

CAUTION
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the document.

NOTICE

Maintenance schedule

Table 3 shows the recommended schedule of maintenance tasks. Facility requirements and operating conditions may increase the frequency of some tasks. Table 4 shows the average service life of wearing parts for standard operating conditions and default (factory) settings.

Maintenance schedule

Task| 1 week| 3 months| 6 months| 1 year| As necessary
---|---|---|---|---|---
Visual inspection| X| | | |
Clean the measuring path on page 18| | | | | X
Validate the probe calibration on page 21| | | X10| |
Replace the wiper blade on page 19| | X10,11| | |
Manufacturer service inspection| | | | X 12|

Wearing parts consumption

Clean the measuring path

CAUTION
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.

CAUTION
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and national regulations.

• Based on non-abrasive water conditions
• Based on the default settings
• A minimum of one inspection per year is required. For the best performance and uptime, the manufacturer recommends 2 inspections per year.
• Replace each time the probe is opened.

Normal operation of this device may require the use of chemicals or samples that are biologically unsafe.

• Observe all cautionary information printed on the original solution containers and safety data sheets prior to their use.
• Dispose of all consumed solutions in accordance with the local and national regulations and laws.
• Select the type of protective equipment suitable to the concentration and quantity of the dangerous material being used.

If the wiper interval is correctly set for the application and the wiper profile is replaced regularly, more cleaning of the measuring path is not necessary.

1. Go to the main menu, then select Sensor setup.

2. Select the applicable sensor, if necessary.

3. Select Maintenance.

4. Set the outputs on Hold.

5. Remove the probe from the tank or flow through unit.

6. Go back to the sensor menu, then select Diagnostics/Test > Signals.

7. Rinse the probe with clean water.
   As an alternative, use a window cleaner, grease remover or 5 % hydrochloric acid to clean the measuring path based on the quantity and type of contamination. Soak the probe in the cleaning solution for 5 to 10 minutes.

8. Carefully clean the measuring path with distilled water. Clean the measuring path until the DExt1 and DExt2 values are less than 15.

9. Select Back to go back to Diagnostics/Test.

10. Select Back again.

11. Select Return sensor to process.
    The probe goes back to measurement mode after the automatic wipe cleaning.

12. Install the probe in the tank or flow through unit.

Replace the wiper blade

Replace the wiper blade when one or more of the conditions that follow occurs:

• After 25,000 cleaning cycles (A-B-A or B-A-B)
• After 50,000 cleaning single movements (A-B or B-A)
• if the wiper blade has damage or does not operate correctly.
  1. Remove the probe from the tank or flow through unit.
  2. Go to the maintenance menu as follows:
  • SC200 and SC1000 Controllers—Go to the main menu, then select Sensor setup > Maintenance.
  • SC4500 Controller and Claros interface—Push the tile of the device and select Device menu > Maintenance.
  3. Select Wiper replacement.
  4. Complete the instructions on the display. When asked, replace the wiper blade. Refer to the illustrated steps in Figure 8 and Figure 9.

Replace wiper blade—1 mm and 2 mm

Replace wiper blade—5 mm

Validate the probe calibration
CAUTION
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.

CAUTION
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and national regulations.

CAUTION
Ultraviolet (UV) light exposure. Exposure to UV light can cause eye and skin damage. Do not look directly into the measurement path when probe is in operation. Protect eyes and skin from direct exposure to UV light. Wear all appropriate personal protective equipment.
Do the steps that follow to validate the probe calibration.

1. Go to the main menu, then select Sensor setup.

2. Select the applicable sensor, if necessary.

3. Select Maintenance.

4. Set the outputs on Hold.

5. Remove the probe from the tank or flow through unit.

6. Rinse the measuring path with distilled water.

7. Prepare the probe as follows:

   • Fully clean and dry the back hole area and apply tape to cover the hole of the measuring path. Refer to the illustrated steps in Figure 10. Note: Make sure that no soluble compounds touch the medium that fills the measuring path.
   • Turn the probe until the measuring path is in the horizontal position.
   • Purge the measuring path with 10 mL of standard solution.
   • Fill the measuring path with standard solution.

8. Go to the signals menu as follows:

   • SC200 and SC1000 Controllers—Go back to the sensor menu, then select DIAG/TEST > Signals.
   • SC4500 Controller and Claros interface—Go back to the sensor menu, then select Diagnostics/Test > Signals. Select Enter to start the measurement.

9. Examine the values that show on the controller display:

   • The first line (first three lines for the NT3200sc) shows the values from the user calibration
     (offset, factor, signal average and matrix calibration for the NT3200sc, if applicable).

   • The next line (next three lines for the NT3200sc) shows the values from the factory calibration (factor, offset or matrix calibration).
     Remove the tape and make sure that the back hole of the measuring path is free.

10. Install the probe in the tank or flow through unit.

11. Select Back.

12. Complete the instructions on the display.

Section 7: Troubleshooting

If you encounter any issues with the product, refer to the troubleshooting section in the user manual. If the issue persists, contact the manufacturer or authorized service center for assistance.

Error messages

technical support.
Measurement failed| The sample signal is too low. The temperature is not stable or is out of range. The hardware or electronics are defective.| Contact technical support.
NO3 is too high| The nitrate (NO3) concentration is more than the maximum limit.| **** Measure the concentration of a grab sample. Check the measurement path and clean if necessary. Calibrate the sensor.
NO3 is too low| The nitrate (NO3) concentration is less than the minimum limit.
NO2 is too high| The nitrite (NO2) concentration is more than the maximum limit.
NO2 is too low| The nitrite (NO2) concentration is less than the minimum limit.
NOx is too high| The nitrate (NOx) concentration is more than the maximum limit.
NOx is too low| The nitrate (NOx) concentration is less than the minimum limit.
Unstable measurement (sc200/sc1000: UNSTABLE)| The particles in the medium cause the measurement to change continuously.| Check the sensor location and if necessary, measure with filtration (bypass, flow through cell).
Matrix calibration| A matrix calibration is necessary.| Complete a matrix calibration. First delete all existing calibration points when the probe is moved to a different environment or the matrix changes significantly.
Wiper failed| The wiper is blocked. The wiper position is not detected. The wiper is defective.| Examine the measuring path and clean if necessary. Do a wiper test. Contact technical support.
---|---|---
Flash lamp failed| The flash lamp or flash lamp control is defective.| Contact technical support.
Humidity| There is too much humidity in the sensor.| Remove the probe from the basin or flow-through unit. Examine the humidity value in Diagnostics/Test > Signals. Contact technical support.
Temperature is out of range| The temperature in the sensor is too high.| Check the temperature in Diagnostics/Test > Signals. Check the environmental conditions. Cool the sensor. Try a different installation location. Contact technical support.

Warning and reminders

or flow- through unit. Examine the humidity value in Diagnostics/Test > Signals.
Temperature is out of range| The temperature in the sensor is too high.| Check the temperature in Diagnostics/Test

Signals.
Check the environmental conditions. Cool the sensor. Try a different installation location. Contact technical support.
Wiper replacement| The time interval for servicing the wiper blade has expired.| Replace the wiper blade.
Shaft seals| The time interval for servicing the shaft seals has expired.| Contact technical support.
Seals| The time interval for servicing the seals has expired.| Contact technical support.
Service| The time interval for factory service has expired.| Contact technical support.
Calibration NO3/NO3N| The set calibration interval has expired.| Complete a standard calibration.
Calibration NO2/NO2N| The set calibration interval has expired.| Complete a standard calibration.
Matrix calibration| The set calibration interval has expired.| Complete a matrix calibration.

Section 8: Replacement parts and accessories

If you need to replace any parts or require additional accessories for your product, refer to the replacement parts and accessories section in the user manual or contact the manufacturer for further assistance.

WARNING
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.
Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to the company website for contact information.

Replacement parts

Accessories

Mounting hardware system with brackets, 90° adapter, stainless steel Includes:| each| LZY714.99.53220
Base| each| LZY827
Fastening lug| each| LZY804
Retaining clamp (2x)| 2| LZX200
Mounting pipe 2 m| each| LZY714.99.00020
Hardware HS| each| LZY823
90° sensor adapter| each| LZY714.99.50000
Small parts for mounting hardware| each| LZY822
Extension pipe 1.0 m (3.28 ft)| each| LZY714.99.00030
Extension pipe 1.8 m (5.91 ft)| each| LZY714.99.00040
Second fastening point, includes retaining clamp| each| LZY714.99.03000
Flow through unit, 1, 2 mm (0.04, 0.08 inch)| each| LZX869
Flow through unit, 5 mm (0.20 inch)| each| LZX867
Tubing set for flow through unit| each| LZX407
Allen key with setscrew| each| LZX875
Sealing insert probe cable, slotted| each| LZY998
Nitrate standard, 15.0 mg/L NO3 (3.39 mg/L NO3-N)| each| LCW942
Nitrate standard, 25.0 mg/L NO3 (5.65 mg/L NO3-N)| each| LCW828
Nitrate standard, 40.0 mg/L NO3 (9.04 mg/L NO3-N)| each| LCW943
Nitrate standard, 50.0 mg/L NO3 (11.3 mg/L NO3-N)| each| LCW825
Nitrate standard, 75.0 mg/L NO3 (16.9 mg/L NO3-N)| each| LCW944
Nitrate standard, 100 mg/L NO3 (22.6 mg/L NO3-N)| each| LCW826
Nitrate standard, 150 mg/L NO3 (33.9 mg/L NO3-N)| each| LCW945
---|---|---
Nitrate standard, 200 mg/L NO3 (45.2 mg/L NO3-N)| each| LCW827
Nitrate standard, 300 mg/L NO3 (67.8 mg/L NO3-N)| each| LCW946
Nitrate standard, 400 mg/L NO3 (90.4 mg/L NO3-N)| each| LCW863
Nitrite standard, 5.00 mg/L NO2 (1.52 mg/L NO2-N)| each| LCW960
Nitrite standard, 15.0 mg/L NO2 (4.57 mg/L NO2-N)| each| LCW961
Nitrite standard, 25.0 mg/L NO2 (7.62 mg/L NO2-N)| each| LCW962
Nitrite standard, 40.0 mg/L NO2 (12.2 mg/L NO2-N)| each| LCW963
Nitrite standard, 75.0 mg/L NO2 (22.9 mg/L NO2-N)| each| LCW964
Nitrite standard, 100 mg/L NO2 (30.5 mg/L NO2-N)| each| LCW965
Nitrite standard, 150 mg/L NO2 (45.7 mg/L NO2-N)| each| LCW966
Nitrite standard, 200 mg/L NO2 (60.9 mg/L NO2-N)| each| LCW967
Nitrite standard, 300 mg/L NO2 (91.5 mg/L NO2-N)| each| LCW968

Appendix A: Instructions for laboratory measurements **

**

If you intend to use the product for laboratory measurements, refer to the instructions provided in Appendix A of the user manual for detailed guidelines and procedures.

Notes on NO3 and NO2 measurements with LCK / TNT cuvette tests
Select the measurement range of the LCK / TNT test to keep the measured concentration between the middle and the maximum limit of the range, because the lower range frequently has more scatter. Use the mean value from three cuvettes for each measurement.

NO3 and NO2 LCK / TNT measurement ranges
Nitrate:

• LCK339 / TNT835: 1.0 – 60.0 mg/L NO3 | 0.23 – 13.5 mg/L NO3–N
• LCK340 / TNT836: 22 – 155 mg/L NO3 | 5 – 35 mg/L NO3–N
• LCK540 / TNT838: 66 – 664 mg/L NO3 | 15 – 150 mg/L NO3–N

Nitrite:

• LCK341 / TNT839: 0.05 – 2 mg/L NO2 | 0.015 – 0.6 mg/L NO2–N
• LCK342 / TNT840: 2 – 20 mg/L NO2 | 0.6 – 6.0 mg/L NO2–N
• LCK343 / TNT841: 7 – 295 mg/L NO2 | 2 – 90 mg/L NO2–N

Nitrite removal
If the sample contains 2 mg/L or more of NO2, the NO2 must be removed with amidosulfonic acid before an LCK / TNT test for NO3 is started. To remove NO2, add a small quantity (spatula tip) of amidosulfonic acid to approximately 20 mL of sample and mix. The reaction causes nitrogen gas bubbles to form. When no more bubbles are seen (or after 20 minutes maximum), the nitrite removal is complete. Use the reacted sample to measure the NO3 concentration with one of the LCK / TNT tests.

Conversions

Sampling
Collect the sample as near as possible to the probe immediately when the instructions are given during the matrix calibration procedure. Use filtration to remove solids from the sample before the test is started.

Use the two filters that follow:

• Pleated filter for removal of suspended material
• 0.45 µm syringe filter for removal of biologically active bacteria

For the step-by-step test procedure, refer to the instructions for the applicable LCK / TNT tests.

FAQ

Q: Can I use the product in applications not permitted by the manufacturer?
A: No, using the product in applications not permitted by the manufacturer is not approved and may result in improper functioning or damage to the product.

Q: What is the warranty period for the product?
A: The product comes with a warranty period of 1 year, and for customers in the European Union, the warranty period is extended to 2 years.

Q: Where can I find revised editions of the manual?
A: Revised editions of the manual can be found on the manufacturer’s website.

HACH COMPANY World Headquarters
P.O. Box 389, Loveland, CO 80539-0389 U.S.A.
Tel: 970-669-3050
800-227-4224 (U.S.A. only)
Fax: 970-669-2932
Email: orders@hach.com
www.hach.com

HACH LANGE GMBH
Willstätterstraße 11
D-40549 Düsseldorf, Germany
Tel: +49 (0) 2 11 52 88-320
Fax: +49 (0) 2 11 52 88-210
Email : info-de@hach.com
www.de.hach.com

HACH LANGE Sàrl
6, route de Compois
1222 Vésenaz
SWITZERLAND
Tel: +41 22 594 6400
Fax: +41 22 594 6499
© Hach Company/Hach Lange GmbH, 2022, 2023.
All rights reserved. Printed in U.S.A.

References

• Geräte und Reagenzien für die Wasserqualitätsanalyse | Hach
• Hach | Hach

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