3. Operation
3.1 Warm-Up
When the instrument is first turned ON it must go through a period of adjustment and calibration. No
measurements are taken during this warm-up period.
The following activities occur during warm-up:
Lamp Adjust
The instrument automatically adjusts the UV lamp’s current (10 mA) for a stable (reference voltage)
signal/output (2 minutes).
Ref Stabilise
The instrument sets the reference voltage to 2.8 - 3.2 V output and waits for a stable output signal.
Zero Adjust
The instrument sets the course and fines zero pots for a zero detector output.
Zero Stabilise
The instrument waits until the zero voltage signals are stable.
After this warm-up has completed the instrument will immediately begin making measurements (refer
to Section 3.2).
3.2 Measurement
The Serinus 10 measurement consists of two parts: the background cycle and the sample cycle. The
sample cycle measures sample air with Ozone present and use the background measurement to
subtract the effects of any interferent. The background cycle measures Ozone free air to determine if
any UV absorption is occurring without Ozone present.
Table 4 – Measurements: Background and Sample Cycles
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