Macurco TX-6-ND User Instructions page 19

Nitrogen Dioxide Gas Test
The following steps must be performed when conducting a calibration or calibration verification test (bump test) to ensure proper
performance of the monitor. Failure to do so may adversely affect product performance and result in sickness or death.

When performing a calibration or calibration verification test (bump test) only use certified calibration gas at the
required concentration level. Do not calibrate with expired calibration gas.

If the instrument cannot be calibrated, do not use until the reason can be determined and corrected.

Do not cover or obstruct display or visual alarm cover.

Ensure sensor inlets are unobstructed and is free of debris
General
The TX-6-ND can be bump-tested or calibrated with the ND-FCK with Nitrogen Dioxide gas, regulator and test hood, available through
your local representative or from Macurco.
Contents of the FCK

ND-FCK: (1) Gas Cylinder, 5 ppm Nitrogen Dioxide gas in air

Gas regulator with about two feet of plastic tubing

Gas test hood
FCK Information
Several detectors can be calibrated with one FCK. The only limitation is the amount of gas in the cylinder and the flow of the regulator.
The 34 liter cylinder for example with a 0.2LPM regulator has approximately 170 minutes of continuous calibration run time.
Replacement cylinders are available. The gas cylinder should be replaced when the pressure gauge on the regulator shows 25-psi or
less.
Note: For optimum test results it is suggested that the unit be in clean air (green light on) and be in a low ambient air flow
Gas Testing
Testing the Fan Relay –
1. Remove the Philips screw on the front of the TX-6-ND. Remove the front cover.
2. Open the FCK. Connect the 5 ppm gas cylinder to the regulator.
3. Check the pressure gauge on the regulator. If you have 25-psi or less you will need to replace the gas canister.
4. Assemble regulator, hose and test hood and place the Test Hood over the gas sensor.
Note: The time to activate the Fan relay depends on the delay setting.
! WARNING
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