Analyzer He version 2.29a Release notes

Error corrections

• Calibration data not erased when "Reset to default" is applied (introduced in 2.28)

Analyzer He version 2.29 Release notes

New features

• New Preferences option "Nitrogen source", selectable Athmospheric | Pure

Changes

• none

Error corrections

• none

Analyzer He version 2.28 Release notes

New features

• flow rate (air only) in service screen

Changes

• improved probe autosetup

Error corrections

• none

Analyzer He version 2.27a Release notes

Changes

• Text on the screen correspond to key name (OK/Enter, on various keyboard versions)

Analyzer He version 2.27 Release notes

New features

• support for new HW release 3.0 (SOLO)

Changes

• Low battery is not error
• Better textation of system messages
• minimal temperature increased to 5°C(41°F)

Error corrections

• none

Analyzer He version 2.26 Release notes

New features

• support for new HW release 2.5

Changes

• support for external thermometer with better resolution

Error corrections

• none

Analyzer He version 2.25 Release notes

New features

• none

Changes

• improved probe autosetup
• accumulator charge gauge has better voltage limits (HW 2.4 only)

Error corrections

• O2 range overload alarm active in all O2 measurements (e.g. calibration, mic solver)

Analyzer He version 2.24 Release notes

New features

• Real time clock support. Available in diver and chemical screen and USB serial output.

Changes

• dropped manufacturing mode for old HW revisions

Error corrections

• none

Analyzer He version 2.23 Release notes

New features

• none

Changes

• slightly improved He measuring
• improved service functions

Error corrections

• none

Analyzer He version 2.22 Release notes

New features

• O2 measurement range overload indication
  (important for older units with limited input range)

Changes

• USB output contains all available measured values
  (%He, %O2, gas temperature, barometer, bottle pressure, bottle temperature)

Error corrections

• better power source detection, the error "Accumulator empty" when powered
  from 9V battery corrected
• doesn't complain that O2 cell is switched off if started in Gas purity mode.
• MOD computation for air uses max pO2 setting

Analyzer He version 2.21 Release notes

New features

• Output debug function in Service mode

Changes

• None

Error corrections

• None

Warning!

Firmware named HeO_xx_yyy_MOD.hex is for modified devices (Oxygen sensor voltage range).
DO NOT USE THIS VERSION UNLESS YOU ARE SURE YOU HAVE A MODIFIED DEVICE!
Modified version has M after FW version number, e.g. 2.21M

Output debug function

New screen in Service mode "Outputs". Relays and external device power on output
are manually driven. On exit, all outputs are switched off.

Display content

Relays: status On/Off and connected pins on rear connector
EPWR: status and level on output pin (TTL level)

Usage

Arrows to select output.
Enter to toggle status.

Analyzer He version 2.20a Release notes

Error corrections

• in Gas Purity mode, it was not possible to enter settings for this mode

Analyzer He version 2.20 Release notes

New features

• New preferences item: Startup mode (Trimix | Gas purity)
• New limits items: low and high alarm limits for gas purity mode

Changes

• Gas purity function improved, now it is a global mode of whole analyzer,
  i.e. all meaningful modes are available (big numbers, alarms)

Error corrections

• for LCD units: the full intensity backlight flash doesn't occur, backlight starts
  at preset value

Gas purity measurement

Usage

Main menu item "Trimix <-> Gas purity" toggles between these modes (global measurement mode).
Startup mode is defined in Preferences setup (last item).
Available screens:

• "chemical" screen (both components percentage, the sum must be 100%)
  Pressure and external temperature sensors are connectable as in trimix mode.

• big numbers. It is not possible to mix small and big characters on the screen
  (internal limitation), so component names are realized by special 'big' characters,
  in fact they read 'O2' or 'He' (one char). Gas purity component names are user
  configurable, so they are displayed only as 'C1' and 'C2' (component 1/2) at this screen.

• alarms. Gas purity has its own limit settings for first component. The second
  component is computed, it doesn't make sense to set alarms for both components
  simultaneously. Both acoustic (from menu, "Continual analysis") and electronic
  using internal relays (by connector plug-in) alarms are available.

Analyzer He version 2.19 Release notes

New features

• Gas purity function. Now the analyzer can measure any mixture, if sound velicity in
  in each compound are different enough.

Changes

• Swapped cursor keys (Menu, Mode) in numeric editor. Present functions:
  Menu = cursor left (with wrap around)
  Cal = set default value
  Mode = cursor right

Error corrections

• None

Gas purity measurement

Usage

Select Menu / Gas Purity function
Default configuration measure Argon / Air.
Accuracy is 1% at both ends, aprox. 3% in the middle.

Configuration

When gas purity measurement is running, press CAL to open parameters configuration.
Arrows to select item, Enter to edit.
To obtain best results, it is possible to slightly tune Cp parameter to get 100% reading
with pure component.

Params for common gases and mixtures