CODEL Tunnel Tech 500 Series - 6 Maintenance

CODEL Operation and Maintenance Manual
Issue : A Rev. : 3 Date : 13/11/2018 Ref. : 100351
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6 Maintenance
The Tunnel Tech 500 Series system is designed for low maintenance. The sensors utilise the latest
microprocessor technology. The TunnelTech 500 sensor uses an infrared source that has a life expectancy of
over 3 years.
6.1.1 Mechanical Check
The mechanical check for the electrochemical cell is via cleaning the cells. Remove the cover of the base of the
E-Cell block and wipe clean with a soft dry cloth to remove any debris from the E-Cells.
6.1.2 Span Check
Every 6 months the response and calibration curve of each analyser must be checked to ensure peak response
is normalised. The following cylinders should be used:
Note: It is possible to use different gas levels as long as they are within the maximum measurement range of
the analyser.
Zero cal - 100% N2
Span NO - 30ppm in N2
Span CO - 300ppm in N2
Span NO
2
- 5000ppb in N2
To initiate span check, remove the blank plug from the E-Cell block and connect the span kit. Connect the pipe
to gas bottle. As this step is to initiate a zero cal, connect 100% N2 bottle.
Set the flow rate to 1 litre per minute and wait for around 3 minutes. The level will be displayed on screen.
6.1.2.1 Calibration
The calibration menu allows the user to perform both a zero calibration for each of the channels available to
the device.
To perform a zero calibration, firstly enter the ‘Setup Mode’ of the device menu and enter ‘zero calibration’
menu option.
Entering the “Zero Calibration” menu the user is presented with a final prompt to calibrate all devices.
Using the or keys, the user has the option of exiting from the menu and returning to the setup menu.