User's Guide

POLI User’s Guide

1. Connect gas inlet of the diffusion version POLI to the calibration adaptor and

connect it to its gas source.

2. Turn the adaptor clockwise to secure the adaptor to the instrument.

3. Make sure the calibration adapter is securely attached before starting the flow of

calibration gas.

6.2.4 Multi-Sensor Span Calibration

This lets you perform a span calibration on multiple sensors simultaneously. It requires

using the appropriate span gas and that the concentration labeled on the gas cylinder

matches the concentration programmed in the POLI.

1. Start the flow of calibration gas.

2. Attach the calibration adapter and gas to the POLI

3. Press [+/OK] to begin calibration. A countdown screen is shown. You can abort

the calibration at any time during the countdown by pressing [ /↓].

If the calibration reaches its conclusion, it shows the sensor names and tells you whether

the calibration passed or failed, followed by the sensor readings.

6.2.5 Single-Sensor Span Calibration

To perform span calibration of an individual sensor, follow these steps:

1. At the calibration menu, select ‘Single Sensor Span’.

2. Select a sensor from the list.

3. Start the flow of calibration gas.

4. Connect the calibration adapter and connect it to a source of calibration gas.

5. Verify that the displayed calibration value meets the concentration label on the gas

cylinder.

6. Press [+/OK] to start calibrating. You can abort the calibration at any time during

the countdown by pressing [ /↓].

After a timer countdown, the span calibration is done. The LCD will display whether the

calibration was successful and the reading for that calibration gas.

Note: If the sensor calibration fails, try again. If calibration fails again, turn off the power

and then replace the sensor.

WARNING: Do not replace sensors in hazardous locations!