Instructions

FLIR MR176 USER MANUAL Document Identifier: MR176-en-US_AB

5.2.5 Internal Moisture Sensor Measurements (Pinless)

1. Follow the steps in Section 5.2.1 through 5.2.4 and select the Pinless mode.

2. Place the internal moisture sensor (back) on the surface of the material to be tested.

Apply light pressure to ensure that the internal sensor is completely flat against the

surface of the material under test.

3. The relative moisture reading is displayed on the main display in the upper left hand

corner (IGM Custom or IGM Moisture modes) or as bargraph with accompanying digits

(Moisture-only mode). Refer to example screens shown in Fig. 5-1.

4. Keep hands, surfaces, and objects away from the rear internal moisture sensor area

when taking measurements.

5. For best results, lift the meter off of the surface under test between measurement

points; do not drag the meter over surfaces.

5.2.6 External Pin Probe Moisture Measurements

1. Follow the steps in Section 5.2.1 through 5.2.4 and select Pin mode from the MOISTURE

mode options.

2. Connect the external pin probe to the meter’s EXT jack on the bottom of the meter

(under the protective flap). Refer to the FLIR website for information on available

external pin moisture probe types.

3. Select the appropriate Material Group as described in Section 5.2.4 (see Section 9 for the

Material Group Appendices). Note: Use Group 9 for building materials.

4. Press the pins into the material under test.

5. The moisture reading is displayed on the main display (%) in the upper left hand corner

(IGM Custom or IGM Moisture modes) or as a bargraph with accompanying digits

(Moisture-only mode). Refer to example screens shown in Fig. 5-1.

Notes on External Pin Probe Moisture measurements

The MR176 will display accurate external pin probe readings in the 7% to 30% range,

depending on the tested material. Moisture Content readings below 6% will display as 0% for

all materials and the maximum specified range is dependent on the fiber saturation point for

specific species. Above the fiber saturation point, the reading can only be used as a relative

reference value.

For more information on fiber saturation please refer to ASTM D7438. For additional

information on Pin moisture measurement accuracy please see ASTM D4444, section 6.