Hach LDOTMHQ10 and LDOTMHQ20 pH and Dissolved Oxygen Meter User Manual

User manual for Hach LDOTMHQ10 and LDOTMHQ20 meters covering safety, installation, operation, calibration and data handling.

Brand: HACH
Category: Other
Document type: User Manual
Language: English
Pages: 100
File format: PDF
File size: 1.5 MB
Published: 17 December, 2011
Updated: 01 October, 2026
MD5 checksum: 446B9652DA7D4A43695480B3E214C5BA
PDF: Hach LDOTMHQ10 and LDOTMHQ20 pH and Dissolved Oxygen Meter User Manual PDF

About this manual

The manual provides safety warnings, installation steps, and detailed operating instructions for the LDOTMHQ10 and LDOTMHQ20 pH and dissolved‑oxygen meters. It explains how to power the devices, connect them via RS‑232, and use the HachLink™ software for data transfer.

Calibration procedures for pH and dissolved‑oxygen sensors, data storage options, and routine maintenance are described, along with troubleshooting tips and specifications such as measurement ranges and power requirements.

What's inside

Safety Information
Installation and Power Supply
RS‑232 Interface and HachLink™ Connection
Operation of pH Measurement
Operation of Dissolved Oxygen Measurement
Calibration Procedures
Data Storage and Transfer
Maintenance and Troubleshooting

Specifications

pH measurement range	-2.00 to 19.99 pH
Dissolved oxygen measurement range	0 to 20 mg/L
Power supply (AC)	115 V / 230 V, 50‑60 Hz

Frequently asked questions

What safety warnings are included in the manual?

The manual uses DANGER, CAUTION and NOTE symbols to highlight safety information and required precautions.

What is the measurement range for dissolved oxygen?

The device measures dissolved oxygen from 0 to 20 mg/L.

What resolution is available for pH measurement?

pH can be read with resolutions of 0.001, 0.01 or 0.1 pH units.

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