Thermo Scientific Sarasota SG901, Руководство пользователя

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Maintenance
Preventive Maintenance
6-2
Sarasota SG901 User Guide Thermo Fisher Scientific
1. Open the analyzer enclosure, and connect the check thermometer to
the sample tube at the entrance or exit of the density meter.
2. Close the door, and allow the system to stabilize.
3. Read the system temperature and the thermometer. The system
temperature should be within ± 0.2°C (0.36°F) of the thermometer. If
the error is significantly outside this range, the density converter may
require calibration. If you have a system with the frequency output
option, refer to the manual supplied with the density converter for
calibration instructions. If you have a system with the headmount
option, the thermometry of the built-in converter cannot be calibrated
on site. Contact Thermo Fisher.
If an electric heater is fitted, it should maintain the temperature within the
enclosure at ± 2°C (3.6°F) of the set control point. By monitoring the
density meter temperature you should read the cabinet temperature. It
should be stable (± 2°C/3.6°F).
The surface temperature of the heater is redundantly limited electronically
and by a safety fuse at the heat source.
The pressure transmitter / density converter can be checked online by
connecting a test gauge to the gas validation input connection. Note that
the gauge should be absolute and have an accuracy of 0.1% or better.
To check the system, connect the test gauge (or pressure transducer) to the
validation input, and open the valve (valve 3, reference Figure 4–1 ). The
test gauge should match the pressure reading from the density converter. If
there is an error, close valve 1 first, and then close valve 4. This will give a
more stable reading. If the readings are still in error, either the density
converter or the pressure transmitter may require calibration.
The pressure transmitter span and zero can be adjusted by up to five
percent independently using the adjusting screws located inside the end of
the transmitter (shown in Figure 6–1).
Thermometry Check
Electric Heater
Check
Pressure
Transmitter Check