Suomi

Choose your country:

FAQ

Freedom

  1. Freedom is still diving even when I’m on land. How can I solve it?
  2. Is it possible to update/upgrade firmware on my Mac?
  3. The Floor item shows 1000 m during an oxygen decompression. Is it a failure?
  4. The Freedom shows me zero decompression stop depth and time after “No deco time” end. Is it a failure?
  5. Firmware update ends with "Write flash firmware error" message.

Analyzer He/O2

  1. How long is the oxygen sensor's service life?
  2. How long is the helium sensor's service life?
  3. Is it possible to measure other gases with the analyzer?
  4. Can the analyzer identify trace amounts of helium?
  5. Why does the analyzer show that there is -0.3% helium in air?
  6. I upgraded the firmware and He sensor stopped working
  7. I get "Ambient pressure sensor not present" error
  8. Is it possible to put a rechargeable 9V battery in the analyzer?
  9. I get Error 7 "Accumulator is empty", but I have no accumulator installed.

Flow Limiter

  1. Leaking gas in case of closed bleed valve
  2. High flow of gas in case of tightened throttling nozzle

Freedom

1. Freedom is still diving even when I’m on land. How can I solve it?

For unblocking a fictitious dive follow this procedure: press both buttons > release one of them > press it again > release both (see the video of this procedure here) Now you are in the service menu. Please select “Force dive end” item. All parameters of this “unwanted dive” will be erased (deco data and CNS included) and it doesn’t affect your next dive.

Check your Firmware version in Main menu > “System check” and make you sure that you have the latest. If not, please update it.

If your problems continue, go to the service menu again and select sensors. On the first page there are the pressure sensor values. Compare these values with expected atmospheric pressure (sensitive barometer, altimeter, local weather forecast etc.). If the pressure differs slightly (+/- 50 mbar) you can correct it in Setup>Calibration>Pressure corr. If the values differ significantly or if they are changing significantly (keep in mind that the atmospheric pressure is changing permanently) there would be a sensor failure. If the sensor failure occurs, send it to our factory for repair.

2. Is it possible to update/upgrade firmware on my Mac?

Not yet unfortunately. We are working on this feature.

3. The Floor item shows 1000 m during an oxygen decompression. Is it a failure?

No. It’s logical. You are not saturated with inert gas during oxygen breathing so the Floor value is theoretically endless. 1000 m is just set limit to display.

4. The Freedom shows me zero decompression stop depth and time after “No deco time” end. Is it a failure?

No. The “No deco time” is terminated in the moment when decompression ceiling is immersed under the surface. Freedom supposes ascent in set ascent rate and calculates with this rate in its decompression plan. If the ascent time is sufficient for desaturation there is no decompression stop. Decompression stop is displayed in the moment when direct ascent isn’t sufficient for desaturation.

5. Firmware update ends with "Write flash firmware error" message.

There are some problems with USB serial port driver in newer versions of Windows (the data handling has changed). Try to update several times or, if possible, use older Windows version (XP prefered.) We are working on solving this incompatibility.

Analyzer He/O2

1. How long is the oxygen sensor's service life?

An electrochemical sensor is used for measuring the oxygen content. When measuring (and even storing the sensor in air), a chemical reaction occurs in the sensor. The sensor's service life is is determined by the depletion of the reagent. The expected service life of the sensor is three years when stored in air at normal temperature with 50% humidity. It is necessary to replace the sensor upon expiration of its service life.

2. How long is the helium sensor's service life?

The helium content is determined using a physical method which in causes no wear and tear in the sensor. Therefore, the sensor's service life is, in principle, unlimited.

3. Is it possible to measure other gases with the analyzer?

Firmware versions prior to 2.19: No. The analyzer is intended only for mixtures containing air (more precisely, nitrogen with characteristic presence of atmospheric argon), oxygen and helium. The presense of another gas (e.g., a larger amount of CO2) in the mixture causes unreliable results. Under certain conditions, the analyzer can be modified for mixtures containing other gases. More information about the possibilities of modification and calibration can be obtained from the manufacturer.

Firware versions 2.19 and later have special "Gas purity" mode, which can measure any binary gas mixture, if sound velicities in each component are different enough. You have to define physical parameters of each component (both specific heats Cp and Cv and molar mass). If fact, a component can be a mixture, but each must contain different gases. Default setting measures Ar and air.

4. Can the analyzer identify trace amounts of helium?

The analyzer measures with differentiation on the order of tenths of a percent. Thus, helium in a concentration smaller than the analyzer's differentiation cannot be identified.

5. Why does the analyzer show that there is -0.3% helium in air?

Of course, the correct value would be zero. However, measuring is hampered by unavoidable discrepancies on the order of tenths of a percent. As such discrepancies can be positive or negative, it therefore can happen that the analyzer shows -0.3 % or 0.3 % helium in air, just as 99.7 % or 100.3 % may be displayed when measuring pure helium.

Similar situation is with measuring of oxygen. Possible error is up to 1 % (depending on manufacturer of O2 cell).

Values are displayed as calculated, there are no hidden altering of measured data to make values look better.

6. I upgraded the firmware and He sensor stopped working

In older firmware revisions the measuring click was hard coded to 30us. Starting with revision 2.18, the click duration is adjustable in range 10-250us. If the stored value was less than 30, the measuring click is not strong enough to be detected. Use this guide to repair.

7. I get "Ambient pressure sensor not present" error

Analyzers version 4 are equipped with ambient pressure sensor, which helps keep proper oxygen sensor calibration. I can happen that for some reason it is disabled and then you get the error message described above. Use this guide to repair.

8. Is it possible to put a rechargeable 9V battery in the analyzer?

Yes, it is, but it will not be recharged, 9V supply is for primary cell only. Starting with version 4, the analyzer is prepared to use LiIon rechargeable cell, but it has to be installed inside the device. This built-in battery can be recharged using external power supply or USB cable. The battery kit is not available yet at this moment, please check our News section on main page.

9. I get Error 7 "Accumulator is empty", but I have no accumulator installed.

This error can appear when the 9V battery is very discharged, so the analyzer assumes it is supplied from accu. Please replace the 9V battery.

Flow Limiter

1. Leaking gas in case of closed bleed valve

Please check, if there has not been lost ball, which forms the cone of bleed valve, during careless removal (see drawing). There is possible to order spare ball in our e-shop.

2. High flow of gas in case of tightened throttling nozzle

Please check, if there has not been lost ball, which is part of throttling nozzle in standard flow limiter, during careless removal (see drawing). There is possible to order spare ball in our e-shop.