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TESTO 645 User Manual

TESTO 645
41 pages
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Instruction manual en
testo 445 · testo 645
1.888.610.7664 info@Testo-Direct.com
www.Testo-Direct.com
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TESTO 645 Specifications

General IconGeneral
Resolution (Pt100)0.1 °C
Resolution (humidity sensor)0.1 %RH
Resolution (NTC)0.1 °C
Protection classIP40
Measuring range (humidity sensor)0 to 100 %RH
Measuring range (lux sensor)0 to 100000 Lux
Power supplyUSB power supply

Summary

Initial Operation

Read Prior to Measurement

Essential precautions and advice to follow before starting any measurement with the instrument.

Battery Installation

Instructions for correctly inserting the battery into the instrument for power supply.

First Measurement

Instrument Description

Keypad and Connection Assignment

Details the layout of the instrument's keypad and the assignment of its connection sockets.

Overview of Controls

Current Measurement

Measurement Functions

Parameter Settings

System Adjustment

Procedure for adjusting instrument parameters and calibrating probes for accurate readings.

Humidity Probe and Parameter Adjustment

Adjusting humidity probes and selecting humidity parameters like dew point or relative humidity.

Pressure Probe and Velocity/Volume Flow Setup

Initializing pressure probes and activating velocity/volume flow measurements.

Memory Settings

Manual and Automatic Data Saving

Instructions for manually saving readings or configuring automatic data logging.

Reading and Printing Memory Contents

Steps to retrieve and print stored measurement data from the instrument's memory.

Instrument Configuration

Power Save and Power Supply Settings

Configuration of the automatic power-off function and management of power supply options.

Unit Selection and Factory Reset

How to select measurement units and perform a factory reset of instrument settings.

Velocity Measurement

CO/CO2 Measurement

Error Messages and Remedies

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