BRANNSTROM CleanTrack 1000 B, Operation And Technical Manual, Page: 69 / 232

Brannstrom Sweden AB CleanTrack 1000B - Rev 2.20xd, 2019 Page 69 of 232
7.8.5. Pressure
Refer to chapter
4.8. Pressure alarm settings
page
24
for suggestions of limit settings.
The function of the pressure alarms is explained below, see chapter 7.8.5.1. Static Pressure/Water function page 69 .
"Pressure" Is value, calculated pressure.
"Static Pressure" Measured counter pressure from overboard line.
"Water High limit" High pressure limit from fresh water.
"Water Low limit" Low pressure limit from fresh water.
"Sample High limit" High pressure limit from sample pump.
"Sample Low limit"
Low pressure limit from sample pump.
"Input current" Measured current on Pressure input.
"Pressure at 4mA" Corresponding pressure for current input of 4 mA.
"Pressure at 20mA" Corresponding pressure for current input of 20 mA.
7.8.5.1. Static Pressure/Water function
The pressure alarms compare the actual pressure with the pressure measured from the overboard line before the sample
pump was started or the fresh water valve was opened.
Assume that the unit is started without flushing and the start is normal without any alarms.
The process for checking the sample pressure limits then becomes:
1. Measure the “Pressure” in the analyzing unit. This will be the same pressure as in the overboard line because
the inlet and outlet pipes to the overboard line are open.
2. The “Static Pressure” is set to the measured “Pressure”. The “Static Pressure” will not change while the sample
pump is running.
3. Start the sample pump.
4. The level of pressure increase is then calculated as “pressure increase” = “Pressure” – “Static Pressure”.
5. The “pressure increase” is then compared with the “Sample High limit” and “Sample Low limit”.
6. If “pressure increase”>“Sample High limit” for 10 seconds the “Alarm – High Work Pressure” is activated and
if “pressure increase”<“Sample Low limit” for 10 seconds the “Alarm – Low Work Pressure” is activated.
7. Any of these 2 alarms will stop the unit, switch of the sample pump and close the overboard valve.
Assume that the unit is started with water flushing and the start is normal without any alarms.
The process for checking the fresh water pressure limit then becomes:
1. Measure the “Pressure” in the analyzing unit. This will be the same pressure as in the overboard line because
the inlet and outlet pipe to the overboard line are open.
2. The “Static Water” is set to the measured “Pressure”. The “Static Water” will not change while the water valve
is open.
3. Open the water valve.
4. The level of pressure increase is then calculated as “pressure increase” = “Pressure” – “Static Water”.
5. The “pressure increase” is then compared with the “Water High limit” and “Water Low limit”.
6. If “pressure increase”>“Water High limit” for 10 seconds the “Alarm – High Water Pressure” is activated and
if “pressure increase”<“Water Low limit” for 10 seconds the “Alarm – Low Water Pressure” is activated.
7. Any of these 2 alarms will stop the unit and close the water valve.