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Hach Sension 156 - User Manual

Hach Sension 156
96 pages
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Cat. No. 54650-18
Portable Multiparameter
Meter Manual
© Hach Company, 2000, 2001. All rights reserved. Printed in the U.S.A. te/dk 5/01 2ed

Table of Contents

Questions and Answers

  • L
    Laura JonesAug 1, 2025
    How to fix high conductivity readings on Hach Sension 156?
    • M
      Michael GibbsAug 1, 2025
      If the conductivity reading on your Hach Multimeter is above 256 mS/cm, the salinity is greater than 43, or the TDS is greater than 50 g/L, the conductivity electrode may need calibrating, or a diluted sample may be required for an accurate reading.
  • C
    Cassandra JonesAug 5, 2025
    Why does my Hach Multimeter show a DO calibration error?
    • C
      charles44Aug 5, 2025
      If you get a DO calibration error on your Hach Multimeter, wait at least 20–30 minutes longer or use the correct standard and redo the DO calibration. This issue is probably caused by calibrating with an unpolarized electrode or using the wrong calibration standard.
  • J
    Jordan AndersonAug 10, 2025
    How to resolve pH calibration error on Hach Sension 156 Multimeter?
    • D
      Denise GreenAug 10, 2025
      If you are getting a pH calibration error (latest point produced invalid slope) on your Hach Multimeter, verify you have the correct buffer and reread. This could also indicate an electrode failure or that you read the wrong buffer.
  • T
    tiffanycampbellAug 13, 2025
    What to do if Hach Multimeter pH reading is between buffers?
    • S
      stevenbrownAug 14, 2025
      If your Hach Multimeter's pH reading stabilizes between valid buffers, verify you have the correct buffer and reread. This may be due to reading the wrong buffer, or electrode failure.
  • A
    Ann LopezAug 18, 2025
    Why is DO concentration too high on my Hach Sension 156 Multimeter?
    • M
      Matthew ScottAug 18, 2025
      If the DO concentration is greater than 30 mg/L on your Hach Multimeter, the DO electrode may need more time to polarize after attaching to the meter.
  • M
    marquezjenniferAug 23, 2025
    How to fix temperature out of range error on Hach Multimeter?
    • W
      william23Aug 23, 2025
      If the temperature is out of range for DO or Salinity measurements on your Hach Multimeter, change the temperature of the sample, because the DO and Salinity measurement calculations are only valid within the specified temperature ranges.
  • J
    John WellsAug 27, 2025
    What causes conductivity calibration error on Hach Multimeter?
    • T
      Troy ReedAug 27, 2025
      Verify you have the correct buffer and reread if you are getting Conductivity calibration error on Hach Multimeter. This is probably because you read the wrong conductivity buffer, or due to electrode failure.

Summary

SAFETY PRECAUTIONS

Use of Hazard Information

Explains hazard signal words like Danger, Caution, and Note.

Precautionary Labels

Advises reading all labels for safety and instrument protection.

SPECIFICATIONS

SECTION 2 INSTRUMENT SETUP

Power Connection

Guides on connecting the meter using a docking station or batteries.

SECTION 3 pH OPERATION MODE

pH Calibration

Provides step-by-step instructions for performing pH calibration.

SECTION 4 CONDUCTIVITY OPERATION MODE

Conductivity Calibration

Explains methods for calibrating conductivity using standards or cell constant.

SECTION 5 DISSOLVED OXYGEN OPERATION MODE

Dissolved Oxygen Calibration

Outlines procedures for zeroing and calibrating the DO probe.

SECTION 8 TROUBLESHOOTING

Error Codes

Lists error codes and their possible remedies for meter issues.

Hach Sension 156 Specifications

General IconGeneral
BrandHach
ModelSension 156
CategoryMultimeter
LanguageEnglish