From version 4.6 firmware, the manual has been laid-out in a new way. From this point, all options for the HDI are in their own section, which is inserted before the appendicies. Some of the option chapters take many pages, so they should be downloaded separately.
| HDI manual | Firmware version 4.7 |
| C option | Control and Alarm option |
| 2 option | The Two probe input option |
| Z option | The two analogue output option |
| L option | The Lemo connector option |
| G option | Configuration for the alternative probe range |
| K option | Vessel Calibration option |
| Totalise | Setting up the Totaliser configuration. |
Manuals for previous issues of firmware operating their instrument can download a manual appropriate to their unit.
All these manuals include the section for the optional control and alarm output; if the unit is not an HDIc, this section should be ignored.
| previous version (330k) | 4.4 | 4.3 | 4.2 | 4.1 | 4.0 | 3.A | 3.9 | 3.8 | 3.7 | 3.6 | 3.5 | 3.4 | 3.3 |
Firmware issues shown in this colour. These were restricted release issues, with specific changes included and documented in application note(s). The appropriate manual is the previous version available here.
Firmware issues shown in this colour. Previous general release issues. The appropriate manual is the version available here, which may have a different version number on the cover and pages 5.1 and 10.1 Some firmware upgrades had no effect on the normal operation of the HDI, and the only difference the user would see is the version number of the firmware.
Note that the previous versions of manuals downloaded here may differ in layout to the printed version issued at the time of despatch.
Other relivent manuals |
|
| Latest version | Helium Tiefenanzeiger (HDI); v4.3 (in Deutsch); 303k |
| Transfer Control Module (one AC output version); 80k | |
| Old units only | Nitrogen Level Gauge Probe (Application note); 48k |