3M 3MTM quick start Maintenance/Cleaning, Sensors Locations, Impactor Care and Particulates

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Maintenance/Cleaning

Sensors Locations

The gas sensors are inserted, factory calibrated, and ready for usage upon delivery. (The diagram below is based on the EVM-7 model.) Occasionally , you may have to care for the sensors which will require removing and inserting.

;; NOTE: Verify the unit is off and unplugged from the power cord before removing or inserting

sensors.

1. Remove the sensor bar (via the screws) and remove the manifold.

2. Sensor bar removal and location of sensors are displayed below.

Manifold

• When removing/inserting, align the socket pins to the circuit board accordingly.

Sensor bar - Remove screw 1 & 2 and lift off cover

Screw 1

Screw 2

PID sensor

Toxic sensor

CO2 sensor

Impactor Care and Particulates

The impactor requires periodic greasing and cleaning for particulate measuring only.

1.Remove the turret (red housing cover over the impactor) by removing the right and left screw with the supplied allen wrench (stored behind the access door.)

2.Remove all debris/dust with a Q-tip/cotton.

3.Wipe a very thin film of silicone grease onto the metal plates using a Q-tip/cotton.

4.Re-attach by placing the turret cover over the housing and tighten screws.

Thin-layer of silicone is applied to a clean impactor.

Example of

accumulated dust

(will form into a pyramid)

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Contents Quick Start Guide Turning On/Off and Navigating EVM and User InterfaceStart Screen and Measurement Views Overview of running measurements Reset/Clear memory, if necessary Start\File System menuParticulate Measurements Particulate Advanced Calibration Gravimetric Particulate Zero CalibrationLogging Particulates PID Span Calibration Volatile Organic Compounds VOCsPID Zero Calibration Logging VOCsToxic and Carbon Dioxide Zero Calibration Toxic GasesCarbon Dioxide Gas Type of Gas Range Res Zero cal Span calToxic and Carbon Dioxide Span Calibration Measuring particulatesLogging Toxic Gases or Carbon Dioxide Navigate to the Setup\Calibration\Flow RT rate screen Temperature and Relative HumidityLogging/Viewing Temperature and/or Relative Humidity Particulate Air FlowViewing Logged sessions past sessions Air VelocityNavigate to Start \Past Session screen Sensors Locations Maintenance/CleaningThin-layer of silicone is applied to a clean impactor Impactor Care and ParticulatesCommunicating Viewing your data074-301, Rev.D /13