Seli STS-03 User Manual

80 pages

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Bedienungsanleitung

T

rübungsmessgerät

STS-03 / 04

Dieselstraße 13 • 48485 Neuenkirchen • Tel. 05973 / 9474-0 • Fax 05973 / 9474-74

E-Mail Zentrale@seli.de • Internet http://www.seli.de

Manual

T

urbidity Measuring Unit

Table of Contents

Questions and Answers:

M
Mike DeanAug 3, 2025
Why Seli STS-03 display no or erroneous measured value?
- R
  richardsashleyAug 3, 2025
  If your Seli Measuring Instruments display no or erroneous measured values, there could be several reasons. First, check the voltage at the sensor, ensuring the electrical connection is correct. Second, the measuring windows might be coated; clean them. If they frequently get dirty, consider using an STS04 with SAW8XX quick-change fitting. Finally, an erroneous calibration could be the cause. In this case, reset the calibration to factory settings in the calibration menu.
E
Elizabeth TaylorAug 10, 2025
What to do if the output current does not match the measured value in Seli STS-03?
- I
  ibanksAug 10, 2025
  If the output current doesn't match the measured value in your Seli Measuring Instruments, it could be due to a couple of reasons. The current output might be parameterized incorrectly, so check and, if needed, change the parameterization of the current output. Also, an incorrect electrical connection can cause this issue, so verify and correct the electrical connection.
R
Robert FlemingAug 15, 2025
Why Seli Measuring Instruments show strongly fluctuating measured value?
- I
  ihansenAug 16, 2025
  If you observe strongly fluctuating measured values on your Seli Measuring Instruments, consider these possible causes. One reason might be air bubbles in the system; in this case, dampen display and output current. Another cause could be that the sensor is not completely submerged in the process fluid; if so, change the installation location.
V
Vickie EscobarAug 22, 2025
What to do if switching output does not switch properly on Seli STS-03?
- M
  Mark ParksAug 22, 2025
  If the switching output of your Seli Measuring Instruments isn't switching properly, there are a couple of potential causes. First, the switching output might be parameterized incorrectly; check and, if necessary, change the parameterization of the switching output. Second, the electrical connection could be incorrect; verify and correct the electrical connection.

Seli STS-03 Specifications

General

Operating time	8 hours
Type	Total Station
Resolution	1mm
Operating Temperature	-20°C to +50°C
Power Supply	Rechargeable battery

Summary

Protective Measures and Precautions

General Safety Instructions

Provides essential safety guidelines for operating the STS sensor safely and correctly.

Intended Use

Product Description

NIR Sensor STS 03/04

Introduces the STS 03/04 sensor, detailing its components and measuring principles of absorption and opacity.

STS 03

STS 04

Measuring Range

Parameterisation

User Menu

Describes how to navigate and use the sensor's user menu for parameter configuration via function keys.

Start of Measuring Range

End of Measuring Range

Switching-on Point

Switching-off Point

Lower Output Limit

Upper Output Limit

Output Current

Explains the 4-20mA output and its configuration via parameters like start/end of range and damping.

Switching Points

Details the configuration of the PNP switching output using switching-on and switching-off points.

Switching Function

Keylock

Explains how to protect the keyboard against unauthorized access by setting a time limit.

Reset

Details how to reset all user parameters to factory settings, noting that calibration values are preserved.

Calibration by the User

Calibration Menu

Guides on accessing and navigating the calibration menu for user-specific calibration procedures.

Number of Calibration Points

Calibration Points: Target Values

Calibration Points: Actual Values

Saving the Calibration

Reset

Calibration Using Reference Solutions

Provides step-by-step instructions for calibrating the sensor using standard reference solutions.

Calibration Using Reference Device

Explains how to calibrate the sensor against a reference device using sample measurements.

Reference Solution

Resetting to the Factory Calibration

Maintenance

Important Maintenance Instructions

Provides crucial guidelines for performing maintenance work safely and correctly by authorized personnel.

Checking the Process Connection

Cleaning the Measuring Windows

Instructs on cleaning the sensor's measuring windows to prevent corrupt measurements due to contamination.

Troubleshooting

No or Erroneous Measured Value

Lists possible causes and remedies for situations where the measured value is absent or incorrect.

Strongly Fluctuating Measured Value

Addresses causes for fluctuating measured values, such as air bubbles or improper submersion, and their solutions.

Output Current Does Not Match the Measured Value

Troubleshoots discrepancies between the output current and the measured value, suggesting parameter or connection checks.

Switching Output Does Not Switch Properly

Diagnoses issues with the switching output not functioning correctly, pointing to parameter or connection errors.

Keyboard Cannot Be Operated

Error Message on the Display

Explains various error messages displayed by the sensor and their corresponding remedies or manufacturer contact.