5.6.2 Span Precision Check
Equipment Required
• Span source
Procedure
1. Supply the instrument with a span source (refer to Section 5.5 for the procedure of setting up a
span but do not do a Span Calibrate O3, and continue following below steps) (If using internal IZS
refer to Section 5.6.2.1).
2. Observe and record the measurement from the instrument.
3. Check both readings against local applicable standards.
4. Select - Cal. Mode → Measure - Accept (To return to sample measure).
If an instrument fails a span precision check (based on the user’s local applicable standards), perform
a span calibration (refer to Section 5.5).
5.6.2.1 IZS Span Precision Check (Option)
Equipment Required
• N/A
Procedure
1. Open - Main Menu → Calibration Menu → Ozone Calibration Menu.
2. Edit – Ozone Set Point – (Set the concentration to 80% of the instrument measurement range) -
Accept.
3. Open - Main Menu → Calibration Menu.
4. Select - Cal. Type → Manual - Accept.
5. Select - Span Source → Internal - Accept.
6. Select - Cal. Mode → Span - Accept.
7. Let the internal Ozone generator stabilise 20 minutes.
8. Let the instrument stabilise, typically 15 minutes.
9. Observe and record the measurement from the instrument.
10. Check both readings against user local applicable standards.
11. Select - Cal. Mode → Measure - Accept (To return to sample measure).
If an instrument fails a span precision check (based on the user’s local applicable standards), perform
a span calibration (refer to Section 5.5).
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