3M 3MTM quick start Toxic Gases, Carbon Dioxide Gas, Toxic and Carbon Dioxide Zero Calibration

Page 6

Toxic Gases

The following toxic gases table displays a quick overview of the ranges and the gases needed to perform zero and span calibrations.

Type of Gas

Range

Res.

Zero cal

Span cal

 

 

 

 

 

gas

gas

Carbon Monoxide (CO)

0

-1000 ppm

1 ppm

nitrogen/pure air

CO

 

 

 

 

 

 

 

Chlorine (CL2)

0.0

- 20

ppm

0.1 ppm

nitrogen/pure air

CL2

 

 

 

 

 

 

 

Ethylene Oxide (EtO)

0.0

- 20

ppm

0.1 ppm

nitrogen/pure air

EtO

 

 

 

 

 

 

Hydrogen Cyanide (HCN)

0.0

- 50 ppm

0.1 ppm

nitrogen/pure air

HCN

 

 

 

 

 

 

Hydrogen Sulfide (H2S)

0

- 500 ppm

1 ppm

nitrogen/pure air

H2S

Nitrogen Dioxide (NO2)

0.0

- 50 ppm

0.1 ppm

nitrogen/pure air

NO2

 

 

 

 

 

 

Nitric Oxide (NO)

0.0

- 100 ppm

0.1 ppm

nitrogen/pure air

NO

 

 

 

 

 

 

Oxygen (O2)

0.0

- 30%

0.1%

nitrogen

Room air

 

 

 

 

 

*1.0 L/min. flow rate

*span 20.9%

 

 

 

 

 

 

Sulphur Dioxide (SO2)

0.0

- 50 ppm

0.1 ppm

nitrogen/pure air

SO2

Carbon Dioxide Gas

Similar to toxic gases, the carbon dioxide sensor should be calibrated prior to logging.

Toxic and Carbon Dioxide Zero Calibration

Depending on the gas of interest, the toxic zero calibration is performed with the gas indicated in the table above. The CO2 sensor requires a calibration gas, a regulator with at least 1.0 Liter/minute flow rate, and a hose/tubing. Nitrogen (N2) is the recommended gas for a zero calibrating (If you are not applying a gas, start at step 2.)

1.

Connect the appropriate gas/pure air, regulator, tubing, and cal. cup to the EVM.

 

2.

Select Calibration from the Start screen and choose a specific toxic using

keys. (i.e., CO).

3.Press Cal softkey and then press Zero softkey. Once level is stabilized, press Set softkey. (Allow at least 90 seconds to stabilize.)

4.Press Save or Cancel softkey to store the process. Disconnect components and return to the start screen via On/Off/Esc key.

Cal. cup/adapter

Tubing

Regulator

 

 

Cal. gas source

Image 6
Contents Quick Start Guide EVM and User Interface Turning On/Off and NavigatingStart Screen and Measurement Views Reset/Clear memory, if necessary Start\File System menu Overview of running measurementsParticulate Measurements Particulate Zero Calibration Particulate Advanced Calibration GravimetricLogging 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 calMeasuring particulates Toxic and Carbon Dioxide Span CalibrationLogging 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 FlowAir Velocity Viewing Logged sessions past sessionsNavigate 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