Prior to use, it is good practice to ensure that:
Step 1 The instrument has the correct time and date set.
Step 2 Fit the sample filter checking that it is clean and dry. If
experiencing condensation in sample line or the sample filter
keeps getting blocked, fit the moisture trap or similar at take-
off point.
Step 3 The battery has a good charge (minimum 25% charge,
even if only a few readings are required).
Step 4 The memory has sufficient space available.
Step 5 The main gases have been verified with zero gas
concentration present.
Step 6 If necessary check the span calibration with a known
concentration calibration-check gas.
Step 7 Take readings.
Do protect the instrument from strong direct sunlight which
will quickly raise the temperature of the instrument beyond its
operating range and the LCD display will appear almost black.
The contrast setting cannot then alter the contrast.
Do remember to always use the sample filter! If the sample
filter becomes flooded, change it and ensure all sample tubes
are clean and dry before re-use.
Do not place the instrument against anything hot as this may
cause excessive internal temperatures which can lead to
erroneous readings.
Do not get the instrument wet, for example exposure to rain.
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