MO250 Datasheet, PDF (3/6 Pages) Extech Instruments Corporation. – Moisture Meter

Operation
Electrode Pins
CAUTION: The electrode measurement pins are extremely sharp. Use care when
handling this instrument. Cover the pins with the protective cap when the
instrument is not in use.
The electrode pins are replaceable / removeable and must be inserted before the meter
can be used. To insert or replace the pins refer to the illustration and instructions below:
a) Remove the protective cap at the top of the meter
b) To remove the pins, loosen the locknut at the base of the electrode pins
c) Install the new pins and tighten the locknuts
1
d) Replace the protective cap
2
3
1. Electrode pins
2. Locking nuts
4
3. Threaded posts
4. Electrode jacks at top of meter
Basic Operation
1. Remove the protective cap to expose the electrode pins.
2. Press the POWER key to turn the meter ON / OFF.
3. Press the MATERIAL key to select the material under test.
A ‘1’ will appear in the right bottom display for concrete and other non-wood
material. A ‘2’ will appear for wood. See details below:
Material 1: 13 to 100% relative moisture for concrete and other non-wood
materials; display shows a ‘1’ on the bottom right.
25.0%
1
Material 2: 6% to 40% moisture range for wood; the display shows a ‘2’ on the
bottom right.
36.9%
2
3
MO250 V2.1 6/06