Extech Instruments MO297 Guide de l'utilisateur télécharger pdf (Page 6)

MO297-en-GB_V4.4 12/14

Condensation Mode

The Condensation feature alerts the user when the surface temperature as measured by the IR

thermometer is close to or has reached the Dew Point temperature.

1. Press the power

button to turn the meter on.

2. Simultaneously press the MOIST and RH buttons. The “COND” icon will appear.

3. Point the meter at a surface, press the IRT button to measure the surface temperature. The

small display will indicate the IR surface temperature and the large display will indicate the

difference between the IR temperature and the Dew Point temperature.

4. The meter will then report the potential for condensation on that surface in the following

manner

 If the temperature of the IRT is more than 14°C (25°F) above the Dew Point, the

temperature difference shall be displayed, with no other warning.

 If the temperature of the IRT is 3-14°C (5-25°F) above the Dew Point, the temperature

difference shall be displayed, along with a standard Condensation Indicator icon. The meter

shall beep once to confirm that the reading is in the risk area.

 If the temperature of the IRT is less than 3°C (5°F) above the Dew Point, the temperature

difference shall be displayed, along with a flashing Condensation Indicator icon. The meter

shall beep twice to confirm that the reading is in the high-risk area.

5. Press the RH button to exit the mode.

Vapor Pressure Mode

Ambient Vapor Pressure

1. With the Condensation mode active, press the MODE button to display the Vapor Pressure in

mBAR (°F) or kPa (°C). Press the ▲or ▼button to toggle between mBAR or kPa.

2. Press the MODE button to exit the Vapor Pressure mode.

Surface Vapor Pressure

1. Enter the Vapor Pressure mode as described above.

2. Press the IRT button and aim the laser pointer at the surface to be measured to display the

Surface Vapor Pressure in mBAR (°F) or kPa (°C).

Alarm High and Low Limit Setting

High and Low alarm points can be set for Humidity and Moisture measurements.

Humidity Alarm Set Procedure:

1. With RH% displayed, simultaneously press the RH and MODE buttons.

2. The “HIGH” icon will appear on the display.

3. Press the ▲or ▼button to set the high limit desired.

4. Press the STORE/ALARM SET button to save the value and proceed to the LOW set value.

5. With the “LOW” icon in the display, Press the ▲or ▼button to set the low limit desired.

6. Press the STORE/ALARM SET button to save the value and to return to the normal mode.

7. If the humidity measurement is lower than the low alarm setting or higher than the high alarm

setting, the meter will beep once every second.

Change Temperature units from F to C or C to F

1. Press the power button to turn the meter on.

2. Press the IRT button to turn on the IR thermometer and then release the button.

3. Press the ▲or ▼button to set the desired temperature unit.

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Extech Instruments MO297 Guide de l'utilisateur Page 6

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Extech Instruments MO297 Guide de l'utilisateur Page 6

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