Serinus 51 User manual 1.0
Service
61
Figure 28 Collets of the UV lamp
4. Physically adjust the UV lamp (rotate and move left and right) until the
maximum peak voltage on the oscilloscope is obtained. The minimum
usable output from the lamp is approximately 0.25 volts amplitude (peak
to peak). If the UV lamp output is below 0.5 volts, then replacement
should be considered.
5. Tighten the UV lamp collets and verify the UV lamp has remained at its
previously adjusted position.
6. Reset the analyzer and allow it to run a startup sequence.
7. Instrument must now be recalibrated
6.4.11 Pressure sensor check
Flow checks are needed to ensure that the pressure sensor is accurately measuring
pressure inside the instrument
1. Remove the exhaust and sample tubing from the back of the analyzer
2. After 5-10 minutes observe the pressure reading in the “cell” (section
3.5.2.3)
3. Compare the Serinus pressure sensor measurement to the current
ambient pressure from an external calibrated sensor. Ensure that they are
reading the same ± 3 TORR (± 0.4 kPa)
4. If no external pressure sensor is available, compare the serinus “cell”
pressure to the “ambient” pressure (section 3.5.2.3). Ensure that they are
reading the same ± 3 TORR (± 0.4 kPa)
5. If the readings are outside this level then perform a Pressure calibration
(section 4.5)
6.4.12 Battery Replacement
The replaceable battery (BT1) on the main controller board may need to be replaced
should it go flat. If the clock settings reset or do not increment when the power is off,
then this is a good indication that the battery is going flat. The battery should be
replaced with the correct type of battery, a 3V Lithium CR2025 type should be used
and installed correctly as follows:
1. Turn off the Instrument, open the cover and remove the 2 screws holding
down the main controller PCB.
2. Lift the PCB up to its Open position. The battery (BT1) is located toward the
front of the PCB.
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