Impact / Impact Pro / Impact Pro IR Operating Instructions
64
Special Notes for NO
2
Cartridges
It is important that you read all of the notes below before installation or use of your
new cartridge.
Installation of your NO
2
Cartridge
Note
Cartridge Installation or Replacement must never be carried out in a
hazardous area.
If a cartridge was previously fitted to the Impact Pro into which the NO1.
2
cartridge is to be installed, remove the Front Cover Grille using the Allen
Key provided in the bottom of the Impact Pro. Unscrew the screw in the
center of the cartridge and lift the cartridge from the Impact Pro.
Place the NO2.
2
cartridge into the Impact Pro and screw the cartridge fully
home using the Allen Key. Guide the cartridge if necessary using your
fingers to ensure that it is seated correctly.
Replace the Pump Seal with the one provided with your cartridge and 3.
replace the Front Cover. Refit the Allen Key into the bottom of the Impact
Pro.
Allow 20 minutes for the sensors to stabilize before first use.4.
To complete installation of the cartridge, switch the Impact Pro on and 5.
accept the New Configuration when prompted to do so.
Using your NO
2
Cartridge
Please ensure that the following points are noted when the cartridge is in service.
The operating 1. temperature range of the cartridge defaults to that of the
lowest sensor fitted. The temperature range of the NO
2
Sensor is -20°C
to +50°C.
Always use PTFE tubing (maximum length of 500mm) when calibrating 2.
the NO
2
channel.
When sampling remotely (i.e. using the internal sample pump or hand 3.
aspirator together with tubing) users should be aware of increased sample
times. For NO
2
the sample time will increase by approximately 90 seconds
for every 10m of tubing used.
When performing a Span Calibration on the NO4.
2
channel it is good
practice to flow NO
2
calibration span gas through connected tubing for a
minimum of 15 minutes without the flow adapter fitted to the Impact Pro
before attempting a span calibration. Failure to do so may result in a false
calibration of the NO
2
channel.
The accuracy of the instrument must be checked with known concentration 5.
calibration gas before each day’s use. If any sensor fails, recalibrate the
Impact Pro before using or alternatively replace the cartridge. Please refer
to Section 4.9 on general instructions on how to calibrate.
Apply calibration span gas at a rate of 300 ml/min for a period of 1 minute 6.
before starting the span calibration on the sensor.
With regard to the actual sensors fitted, please perform span calibrations 7.
on the sensors of the Impact Pro cartridge in the following order: Cl
2
, NH
3
,
H
2
S, NO
2
, SO
2
, CO, Flammable.
If the cartridge contains NH8.
3
, H
2
S or Cl
2
sensors purge the system with air
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