Extech Instruments MO55W User Manual

MO55W-en-GB_V1.1 11/18
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Operation
Operating Steps
1. For pin mode, carefully remove the protective cap to expose the electrode pins.
2. Switch the meter ON by long pressing the button. While powering, the meter emits
audible tones and the display switches on. If the meter does not switch on, please check the
battery (9V) in the rear compartment.
3. Short press the button to step through these operating modes:
• Wood (pin mode)
• Building Material (pin mode)
• Wood (pinless mode) icon blinking
• Building Material (pinless mode) icon blinking
4. For pin mode, push the electrode pins into the material under test.
5. For pinless mode, zero the display by holding the meter in air.
Then press the sensor firmly against a surface to begin testing.
6. Pin-based measurements are the most accurate as they make
direct contact with the test material. Pinless measurements are
also very accurate; for best results use the pinless mode to
compare dry area readings to areas of unknown moisture levels.
7. View the displayed reading and the number of moisture droplet icons . One droplet
indicates low moisture; two droplets indicates moderate moisture; three droplets indicates
high moisture. Refer to the chart on the meter and the one reproduced below.
8. In addition, listen for the audible tones, the higher the moisture the higher the beep rate;
note that there are eight tone variations indicating moisture levels.
9. Long press the power button to switch OFF the meter.
Measurement Interpretation Table
LCD
PIN MODE (%)
PINLESS MODE (RELATIVE)
WOOD
BUILDING
MATERIAL
WOOD
BUILDING
MATERIAL
TOTAL RANGE >
5.0 ~ 50.0
1.5 ~ 33.0
0.1 ~ 99.9
0.1 ~ 99.9
LOW
5.0 ~ 11.9
1.5 ~ 16.9
0.1 ~ 16.9
0.1 ~ 16.9
MEDIUM
12.0 ~ 15.9
17.0 ~ 19.9
17.0 ~ 29.9
17.0 ~ 29.9
HIGH
16.0 ~ 50.0
20.0 ~ 33.0
30.0 ~ 99.9
30.0 ~ 99.9
CAUTION: The electrode measurement pins are extremely sharp. Use care when
handling this instrument. Cover the pins with the protective cap when not in use.

Extech Instruments MO55W Specifications

Measurement Specifications

measurement type	Relative Moisture Content (%)
measurement principle	Electrical resistance (pins)
measurement depth	Pinless mode: 25mm (1 in.) maximum
measurement ranges pin mode	5.0 ~ 50.0% (wood), 1.5 ~ 33.0% (building materials)
measurement ranges pinless mode	0.1 ~ 99.9% (for wood and building materials)
resolution	0.1%
accuracy pin mode	± (3%rdg + 5 digits)
electrode pin length	10mm (0.4")

Power

auto power off	After approx. three (3) minutes
power supply	One (1) 9V Battery (rear compartment)
low battery indication	Battery status icon appears empty or flashing

Operating and Storage Conditions

operating conditions	0 ~ 50[o]C (32 ~ 122[o]F); 80%RH max.
storage conditions	0 ~ 50[o]C (32 ~ 122[o]F); 85%RH max.
dimensions	170 x 65 x 30mm (6.7 x 2.6 x 1.2")

Weight and Materials

weight	120g (4.2 oz.) without battery
electrode pin type	Stainless steel; Integrated, replaceable
display	LCD with multi-function indicators

Summary

Introduction and Features

Key Product Features

Lists key capabilities like detecting moisture, pinless/pin-based measurements, calibration, beeper, droplet icons, display hold, and wireless data logging.

Device Description and Controls

Meter Component Overview

Details the physical components of the meter, including the protective cap, pins, display, buttons, and battery compartment.

Understanding the Display Indicators

Explains the various icons and indicators on the LCD screen, such as moisture droplets, modes, and battery status.

Button Functions Explained

Outlines the function of each button on the meter, including power, mode selection, and display hold/beeper control.

Operating the Moisture Meter

Step-by-Step Measurement Guide

Provides a step-by-step guide on how to use the meter for both pin and pinless measurements, including mode selection and reading interpretation.

Interpreting Moisture Measurement Readings

A table showing moisture reading ranges for wood and building materials in both pin and pinless modes, categorized by moisture levels.

Advanced Operation and Settings

Auto Power OFF, Display Hold, and Beeper

Details the automatic power-off feature, how to freeze readings, and control the audible beeper function.

Pin-Mode Accuracy Test Procedure

Outlines a test procedure to verify pin-mode accuracy using the meter's protective cap.

Wireless Alarm Limit Configuration

Guides on setting high/low alarm limits for wireless alerts via the ExView app and lists adjustment ranges.

Wireless Communication and Application Use

Bluetooth Datalogging Module Overview

Introduces the Bluetooth wireless datalogging module and its data transmission capabilities to smart devices.

Installing and Replacing the Wireless Module

Provides step-by-step instructions for installing or replacing the wireless module in the meter's battery compartment.

Obtaining and Using the ExView W-Series App

Guides users on downloading the app and connecting the meter to the ExView® W-Series app via Bluetooth.

FCC Compliance Statement

States compliance with FCC rules for the wireless module, including conditions for operation.

Maintenance and Care

Battery Replacement Procedure

Instructions on how to replace the meter's 9V battery when the status icon indicates low power.

Proper Storage and Cleaning Guidelines

Provides guidance on storing the meter in a stable environment and cleaning the meter case and pins.

Replacing Measurement Pins

Details how to replace the measurement pins using a small wrench, noting their sharpness.

Technical Specifications and Support

Detailed Meter Specifications

Lists technical details of the MO55W meter, including display, measurement types, ranges, accuracy, power, and dimensions.

Customer Support and Contact Information

Provides contact information for customer support, calibration, repair, and technical assistance.