Hach sension ph31 User Manual (English)

Questions and Answers:

V
Victoria RiddleJul 31, 2025
What to do if buffer or electrode is in poor condition in Hach Laboratory Equipment?
- H
  Hannah ColemanJul 31, 2025
  To address issues with a buffer or electrode in poor condition for Hach Laboratory Equipment: * Recalibrate the equipment. * Inspect the probe: Clean it, ensure no air bubbles are present in the membrane, and shake it like a thermometer. * Try a different probe to determine if the problem lies with the probe itself or the meter. * Check the buffer solution: Verify it matches the buffer specified in the configuration, confirm the temperature specification, and use a fresh buffer solution.
D
Daniel MillerAug 4, 2025
What to do if the electrode is in poor condition in Hach sension ph31?
- E
  Elizabeth DaughertyAug 4, 2025
  If the electrode is in poor condition in your Hach Laboratory Equipment, examine the probe. Clean the probe, ensure there are no air bubbles in the membrane, and shake the probe like a thermometer. You may also want to connect a different probe to verify if the problem is with the probe or the meter.
J
Jeremiah HorneAug 9, 2025
What to do if Hach Laboratory Equipment shows unstable reading Time t> 100 s?
- A
  Arthur WarrenAug 9, 2025
  To solve the unstable reading issue (Time t> 100 s) with your Hach Laboratory Equipment: 1. Recalibrate the equipment. 2. Inspect the probe: Clean it, ensure no air bubbles are in the membrane, and shake it like a thermometer. Try a different probe to see if the issue persists. 3. Ensure the membrane and the diaphragm are fully immersed in the sample.
M
Michelle ParkAug 12, 2025
What to do if the reading time is greater than 60 seconds on Hach sension ph31 Laboratory Equipment?
- U
  ugordonAug 12, 2025
  If the reading time is greater than 60 seconds on your Hach Laboratory Equipment: * Ensure that the membrane and the diaphragm are properly immersed in the sample. * Examine the temperature. * Examine the probe: Clean it, ensure there are no air bubbles in the membrane, shake it like a thermometer and connect a different probe to verify if the problem is with probe or meter.
M
Mike SotoAug 17, 2025
Why asymmetry is greater than 58 mV on Hach sension ph31 Laboratory Equipment?
- A
  Ashley Thomas MDAug 17, 2025
  If the asymmetry is greater than 58 mV on your Hach Laboratory Equipment, it is caused by the slope being out of the accepted range (± 58 mV). Recalibrate the equipment. If the issue persists, connect a new probe.
J
Janet BlackAug 21, 2025
What to do if temperature is out of range on Hach sension ph31 Laboratory Equipment?
- B
  bryanwaltersAug 21, 2025
  If the temperature is out of range on your Hach Laboratory Equipment, examine the temperature sensor. Connect a different probe to verify if the problem is with probe or meter.
R
Rebecca MayAug 26, 2025
What to do if Hach Laboratory Equipment shows SAME BUFFERS error?
- C
  carlos63Aug 26, 2025
  If you encounter a 'SAME BUFFERS' error on your Hach Laboratory Equipment: * Recalibrate the equipment. * Examine the probe: Clean the probe, ensure there are no air bubbles in the membrane, and shake it like a thermometer. Connect a different probe to verify if the problem is with the probe or meter. * Examine the buffer solution and use a new buffer solution.

Hach sension ph31 Specifications

General

pH Accuracy	±0.01 pH
pH Resolution	0.01 pH
mV Range	±1999 mV
mV Resolution	0.1 mV
Temperature Resolution	0.1 °C
Display	LCD
Calibration Points	Up to 3 points
pH Range	0 to 14 pH
Temperature Accuracy	±0.5 °C
Temperature Compensation	Automatic
Power Supply	4 AA batteries
Weight	300 g
Electrode	Replaceable
Temperature Range	0 to 100 °C (32 to 212 °F)

Summary

Specifications

General Specifications

Details on display, keyboard, dimensions, weight, power requirements, and environmental limits.

Measurement Performance

Specifications for resolution, measuring error, and reproducibility for pH, ORP, and temperature.

Connectivity and Data Storage

Information on data storage capacity and available connection types for the meter.

Advanced Features

Details on temperature correction and measurement display lock functionalities.

Safety Information

General Safety Notice

Manufacturer's disclaimer for misuse and user responsibility for application risks.

Hazard Indicator Definitions

Definitions for DANGER, WARNING, and CAUTION hazard statements.

Use of Hazard Information

DANGER Hazard Explanation

Indicates a potentially or imminently hazardous situation resulting in death or serious injury.

WARNING Hazard Explanation

Indicates a potentially or imminently hazardous situation resulting in death or serious injury.

Precautionary Labels and Notices

CAUTION Hazard Explanation

Indicates a potentially hazardous situation resulting in minor or moderate injury.

Instrument Damage Notice

Indicates a situation which, if not avoided, may cause damage to the instrument.

Symbol for Manual Reference

Explains a symbol referencing the instruction manual for operation and safety.

WEEE Disposal Information

Information regarding disposal of European electrical equipment.

Product Overview

Meter Functionality and Components

Describes the sensION+ meters' use for measuring water parameters and product components.

Product Component Identification

Instructions to check received components against Figure 1.

Installation

Probe Holder Assembly

Steps to assemble the probe holder and connect the magnetic stirrer.

Connecting to AC Power

Electrical Safety Warning

DANGER: Electrocution hazard warning for outdoor/wet locations, requires GFCI.

Power Connection Steps

Steps to connect the universal power adapter to the meter and an AC receptacle.

Connector Panel Overview

Identification of Meter Ports

Identifies all ports on the meter's connector panel, including STIRRER, ELECTRODES, and POWER IN.

User Interface and Navigation

Keypad Description

Explains the function of each key on the meter's keypad.

Display Screen Elements

Describes the information shown on the meter's display.

Basic Operation

Key Navigation Guide

Explains how to use keys to navigate menus, confirm options, and change values.

Meter Start-up and Shutdown

Instructions for powering the meter on and off, including a notice about probe connection.

Chemical Exposure Hazard Warning

WARNING: Hazard related to chemical exposure, requiring safety procedures and PPE.

Standard Operation

Language Selection

Steps to select the display language when powering on the meter for the first time.

Calibration

Calibration Settings Overview

Options for setting Calibration type, frequency, and display preferences.

Calibration Procedures

Calibration Settings Options

Details on options like Cal. frequency, Display mV, To a X value, Data introduction, and Factory adjust.

Calibration Type Selection

Explains different calibration types: Technical buffers, DIN19266 Buffers, User Buffers, and To a X value.

Standard Calibration Steps

Step-by-step guide for general liquid calibration using buffers.

Data Management

Viewing Calibration Data

Steps to view the most recent calibration data, including slope, offset, and deviation.

Setting Calibration Reminders

Instructions to set a reminder for the next calibration, from 0-23 hours or 1-7 days.

Initiating Sample Measurements

Steps to select and start a sample measurement from the main menu.

Configuring Measurement Parameters

How to change settings like Resolution, Stability, Display mV, Limits, and Isopotential.

Advanced Operation

Using Sample IDs

Associating readings with a sample ID for data organization.

System Configuration

Sample ID Assignment Options

Options for automatic sequential numbering or manual entry for sample IDs.

Data Output Selection

Options for outputting data: Deactivated, For Printer, or For Computer.

Date and Time Adjustment

Steps to change the meter's date and time settings.

Display Contrast Adjustment

Procedure to adjust the contrast of the display.

Temperature Calibration

Steps to adjust the temperature reading for accuracy at 25 °C and 85 °C.

System Settings and Data Handling

Stirring Settings Control

Instructions for turning the magnetic stirrer on/off and adjusting its speed.

Temperature Unit Selection

Steps to switch temperature units between Celsius and Fahrenheit.

Data Logger Display

How to view Measurement data, Electrode report, and Calibration data.

Deleting Logged Data

Procedure to delete Measurement data or Electrode report logs.

Sending Data to Peripherals

Steps to print Measurement data, Electrode data, Calibration data, etc.

Reporting and Maintenance

Report Output Configuration

Choosing output formats like Reduced, Standard, or GLP with user/header/sensor info.

General Maintenance and Safety

Warning against disassembly; qualified personnel for service; cleaning precautions.

Instrument Cleaning

Instructions for cleaning the instrument exterior with a moist cloth and mild soap.

Probe Cleaning

Guidance on cleaning the probe using specific agents for different contaminations.

Troubleshooting

Calibration Warnings and Errors

Lists common calibration errors and their solutions, including probe and buffer checks.

Measurement Warnings and Errors

Lists common measurement errors and their solutions, including probe and temperature checks.

Replacement Parts and Accessories

Replacement Parts List

Lists available replacement parts for the sensION+ meters with item numbers.

Consumables List

Lists consumables like pH buffer solutions and their item numbers.

Accessory Catalog

Lists accessories such as printers, software, and cables with item numbers.

Standard Solutions and Accessories

Additional Accessories

Lists additional accessories and supplies like magnetic stirrers, beakers, and holders.

Technical Buffer Solutions Reference

Information on technical buffer solutions and their pH/ORP values at varying temperatures.

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