3M 48N user manual Low RH Alignment screen Adjust % to 33% using up/down arrow

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Sensor Alignment

RH Sensor Alignment

6.Place the Salt container, with the salt alignment cap removed, over the RH sensor (middle sensor). Allow level to stabilize for at least 15 minutes. (Refer to Figure 1-25.)

About sensor alignment: if readings are within +/-0.5%, a change in sensor alignment is not required. Skip to step 7 to return to main menu.

NOTE: For a High alignment, use the 75% sensor alignment salt (NaCL) and for a Low alignment, use the 33% alignment salt (MgCl).

Alignment salt (remove rubber cap and place over RH sensor with the sunshield removed)

Once Alignment salt is placed, allow levels to stabilize (about 15 mins).

Low RH Alignment screen Adjust % to 33% (using up/down arrow

keys) and press Enter (after level has stabilized) to store sensor alignment level.

Figure 1-27: RH alignment with Low % example

7.In either the High/Low RH alignment screen, adjust the level to the percentage displayed on the salt container by using the Up/Down Arrow keys. Press I/O Enter key to save.

(The instrument will state either “Successful” or “Failure” if it passed/did not pass. For

“Failure” repeat the steps above.)

Press Enter to save the alignment.

Example of high RH percentage prior to sensor alignment. Press up/down arrows to adjust level after salt has stabilized.

Sensor alignment with High % RH level

Figure 1-28: RH alignment with High% screen

8.To return to the main menu, press Run/Stop key.

9.Verify the RH sensor is +/-0.5% of the specific percentage. If not repeat the steps above.

10.Remove the alignment salt and finger cot. Replace the Sunshield over the RH sensor when completed with the sensor alignment.

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Contents Market Leader Contents List of Figures Iii Introduction QUESTempº 48N ModelPlacing the QUESTempº 48N on the job site Getting StartedUp and Running overview Keypad Operation Keys ExplanationTurning on, logging/capture an event, and turning off Index start-up screenIndicator arrow ∙ Numeric counterSensors Globe ThermometerWaterless Wetbulb & Relative Humidity Sensor Dry Bulb ThermometerWetBulb Globe Temperature Wbgt Stay Times/Rest Times IndiciesSetup Settings ExplanationOperating QUESTempº 48N View Selecting Setup parameters 11 Selecting temperature setting and setupRun ResetPrint Following measurements can be accessed on the display Displayed Items19 Battery & memory screen Screen 6 Index Stay Time/IndexData Logging 22 Navy PHELs screenElectronic sensor check Performing an electronic sensor checkSensor Alignment RH Sensor AlignmentLow RH Alignment screen Adjust % to 33% using up/down arrow 27 RH alignment with Low % examplePrinting Data/CommunicationsParallel 30 Sample printoutsPowering Volt Alkaline Battery ReplacementApproved 9-Volt Batteries Duracell MN1604Appendix a Specifications MeasurementsWeight QUESTemp 48N Block Model LCDWork and recovery Light Appendix B Heat Exposure TablesHeavy Very Heavy TLV Heavy Very Heavy Action LimitPhel Curves Total Exposure Time in Hours Minutes Acgih Clothing CorrectionsUnited States Navy United States Navy Flag Degrees C Flag Conditions for U.S. Navy/Marine Corp. AshoreFlag Degrees F Appendix C Accessories sold separately QT3X-BCAppendix D Software DMS quick overviewCommunicating and Downloading in DMS PortData Finder and quick reports 34 Communicating with the QT⁰ 48N and DMSQuick Report select 36 Quick ReportCustomer service WarrantyCalibration Contacting 3M InstrumentationAbout Us