Concrete Moisture Meter
Instruction Manual
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Introduction
The PosiTest CMM Concrete Moisture Meter uses the principle
of electrical impedance specifically calibrated for comparative
moisture measurements of concrete.
Accurate a
CMM records up to 200 measurements for download to a
computer with the included USB cable.
nd simple to operate, the nondestructive PosiTest
Quick Start
Before measuring with the PosiTest CMM, ensure that the
concrete surface is bare (uncoated), and free of dirt, dust, or
standing water. Inspect the spring-loaded sensor pins on the
underside of the gage and remove a
1. Press to power up the Meter.
2. Verify operation using the included Check Standard (see
instructions on Check Standard).
3. Press to select the desired measurement scale (pg. 3).
4. Press to select between the 3 operating modes (pg. 3).
. Place the Meter onto the concrete surface and press down to
5
fully compress the sensor pins. The sensor pins are designed
to measure accurately on smooth, rough, or uneven concrete
surfaces.
ny dust or debris.
NOTE:
measurements in close proximity to one another, noting the
maximum measurement value for that inspection area. Using
the Hold Max mode (pg. 3) makes this process rapid and
convenient.
It is suggested that the Meter operator take 3 - 4
1
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Reading
number
Battery icon
Operating
mode icon(s)
Reading
Measurement
Scale
Power
NOTE:
Memory
Power
n Press once to power up the PosiTest CMM
n Press and hold for 3 seconds to power down
n When powered down, press and hold to display the
gage serial number
To conserve battery life, the PosiTest CMM
Threaded Mount
Hold Max
automatically turns off after 3 minutes of no activity.
n Press once to record the displayed measurement
into memory. An on-screen memory counter will
Memory
show the current reading number “n”. The
PosiTest CMM stores up to 200 readings for
download to PosiSoft Desktop Software (pg. 4).
n Memory Review Mode — To review stored
measurements, press and hold the Memory button
until the “n/n” memory indicator appears alongside
the most recent saved reading. Press the Memory
button again to cycle through the readings in
memory. Press the Power button to exit Memory
Review Mode.
n To clear memory, press and hold the Memory
and Power buttons until the memory counter
displays “n0”.
NOTE:
While Memory Review Mode is active, the PosiTest
CMM will not take or record measurements.
1/4”-20
Scale
2
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n Press to select the desired measurement scale:
l Concrete 0 to 6%: Used for measuring on
Scale
concrete slabs. This scale is calibrated using the
gravimetric method (percentage of dry weight).
l Carbide Method 0 to 4%: Used for measuring on
concrete slabs. This scale is equivalent to the
Carbide method.
l Relative 0 to 100: Used for taking readings for
reference comparisons. This scale does not
indicate moisture content or humidity.
n Press to toggle between the 3 operating modes:
l Continuous Measurement Mode (no icon): The
Hold Max
Meter continuously updates the display with the
current measurement value (this is the default
operating mode).
l Hold Max Mode : The Meter updates the
display only when the current measurement is
greater than what is already displayed. Press the
Memory button to record the displayed
measurement into memory and r
Press the power button to reset the display without
recording the measurement.
l Hold Max & Save Mode : The Meter
updates the display only when the current
measurement is greater than what is already
displayed. Once stabilized, the measurement will
automatically be stored in memory.
NOTE:
Hold Max & Save Mode is
ideal for quickly measuring and
recording measurements on a large
surface especially when used with the
optional Telescopic Extender
(CMMEXT).
eset the display.
Telescopic Extender:
Ergonomically measure
concrete slabs without the
need to bend or kneel.
3
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¼”-20 Threaded Mount
Convenient and secure
mounting point for the
Telescopic Extender
accessory.
USB Port
Connect the supplied
USB cable to download
recorded measurements.
IMPORTANT:
over the USB port prior to taking measurements.
Battery Compartment
The PosiTest CMM is
powered by (2) AAA
batteries (included). When
replacement is required,
unscrew the compartment
cover to access the
batteries. Be sure to
observe the correct polarity
by inserting the
+ terminal of each
new battery first into
the compartment.
Ensure that the USB protective cover is secured
Accessing Stored Measurement Data
PosiSoft Desktop - Powerful desktop software (PC/Mac) for
downloading, viewing, printing, and storing measurement data.
Includes a customizable, templated PDF Report Generator.
4
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Technical Data
Measurement
Scales
Accuracy
Depth of
Penetration
Temperature
Range
IP Rating
Power
Size
Weight
including batteries
0 to 6% Moisture content of concrete
0 to 4% Carbide Method equivalent
0 to 100 Relative
± 0.5% Moisture content of Concrete
20 mm
0.75”
5°C to 40°C
40°F to 105°F
65
2 AAA Alkaline Batteries
89 mm x 152 mm x 38 mm
3.5” x 6” x 1.5”
295 g
0.65 lbs.
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Troubleshooting and Returning for Service
Before returning your PosiTest CMM for service, first perform the
following actions:
1. Install new batteries in the proper alignment (pg. 4).
2. Examine the sensor pins and remove any debris or dust.
3. Ensure the concrete surface is bare (uncoated) and free of
dirt, dust, or standing water.
IMPORTANT:
If these steps do not resolve the issue, visit our Service &
Support page for information on returning your Meter for a nocharge evaluation.
Limited Warranty, Sole Remedy
and Limited Liability
DeFelsko's sole warranty, remedy, and liability are the express
limited warranty, remedy, and limited liability that are set forth on
its website:
© 2021 DeFelsko Corporation USA
This manual is copyrighted with all rights reserved and may not be reproduced or transmitted,
in whole or part, by any means, without written permission from D eFelsko Corporation.
DeFelsko, PosiTest, PosiTector, and PosiSoft are trademarks of DeFelsko Corporation
registered in the U.S. and in other countries. Other bra nd or product names are trademar ks
or registered trademarks of their respective holder s.
Every effort has been made to ensure that the information i n this ma nual is ac curate.
DeFelsko i s not resp onsible for printing or clerica l errors.
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All Rights Reserved
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