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5.2 Test buoyancy movement
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The manufacturer recommends that the user records all bladder tests.
4. Enter n several times to record the serial number of the float.
5. Enter st several times to record the initial external temperature of the float.
The external temperature should be close the room temperature.
6. Enter ih several times to record the initial internal temperature of the float.
If there is no data and a new c> prompt shows, the float does not have an internal
humidity and temperature sensor. The internal temperature should be within ± 1 °C of
the initial external temperature.
7. Enter io to make sure that the air valve is open and wait 30 seconds.
8. Enter c several times to see the battery voltage, amps, and internal pressure.
9. Enter ic to close the air valve.
10. Enter ii to start the inflation cycle.
In approximately 2 minutes, when the cycle is complete, the c> prompt shows. The
typical inflation cycle takes fewer that 55 pulses to reach 133 counts. If the float uses
more than 70 pulses, contact the manufacturer. If the float uses 128 pulses, the
bladder inflation sequence fails. Contact the manufacturer.
11. Enter c several times to see the inflated internal pressure, vac.
The internal pressure should be 130–135 counts. The goal is 133 counts.
12. Enter if, then y, then push Enter to freeze the float.
13. Stay connected to the float, and wait 10 minutes.
14. Push Enter several times to put the float in standby mode from low power ("sleep")
mode.
15. Enter c several times to see the final inflated internal pressure, vac.
If the float releases its bladder, the counts will return to the initial vacuum pressure. If
this occurs, do the test again. The internal pressure should be within -2 counts from
the previous indication. If the change is more than 2 counts, contact the
manufacturer.
16. Enter st several times to record the final external temperature of the float.
Verify that this value is ± 1 °C of the initial external temperature. If it is not, the float
was not at a stable temperature during the test. Do the test again from the start.
17. Enter ih several times to record the final internal temperature of the float, if the float
has an internal temperature sensor.
Verify that this value is ± 1 °C of the initial internal temperature. If it is not, the float
was not at a stable temperature during the test. Do the test again from the start.
18. Enter if, then y, then push Enter to freeze the float.
19. Disconnect from the float.
20. Stop Tera Term.
This test verifies that the oil system operates correctly.
1. If necessary, connect to the float.
2. If necessary, start Tera Term or other terminal emulator program.
The manufacturer recommends that the user records all buoyancy movements.
3. Enter n several times to record the serial number of the float.
4. Enter id to see the current buoyancy position.
5. Subtract 50 counts from the current buoyancy position and enter "ig (current
buoyancy position - 50 counts)" then push Enter.
Make sure that the float stopped at the buoyancy position from the previous step.
Make sure that there were no changes larger than one count between each buoyancy
position and no changes in the opposite direction of the count, for example,
223 222 221 222 221 220.
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