Extech Instruments MO55W User Manual

MO55W-en-GB_V1.1 11/18
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Description
Meter Description
1. Protective cap and pin-mode test circuit
2. Measurement pins
3. LCD Display
4. Power ON/OFF button (long press)
5. Mode button: Short press to select pin,
pinless, wood, or building materials.
Long press to enable wireless
transmission (radio icon appears)
6. Display Hold (short press)/Beeper
button (long press)
7. Internal pinless moisture sensor
8. Battery/wireless module compartment
Display Description
1. Moisture droplet icons (1 drop for low moisture, 2 for moderate, and 3 for high)
2. Wood mode
3. Building material mode
4. Beeper active icon
5. Moisture reading digits
6. Unit of measure
7. Wireless transmission icon
8. Display Hold mode
9. Battery status icon
Button Description
Button
Button name
Description
Power ON-OFF button
Long press to switch the meter ON or OFF
Mode/Wireless button
Short press to select wood, building materials,
pin or pinless (flashing icon) modes
Long press for wireless transmission
Display Hold / Beeper button
Short press locks reading on the display
Long press disables/enables the beeper

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