Fibre Sensor Port

[fragstone]

Hello,

can you tell me if a reference implemtation for the fibreoptic sensor port is available incl the software protokoll?

regards
Thomas

[heinrichsweikamp]

Hi Thomas,

heinrichs weikamp HUD data output:

Hardware details of IR Link:
- data rate is 2400 Baud, 8 Databits, 1 Stopbit, no parity, (2400, N, 8, 1)
- Carrier frequency is 38kHz
- 16bit values are transmitted in little Endian format (LOW:HIGH)

Software:

1. Output from HUD (Frame is updated and send every second):
- Total of 15Bytes (~53ms frame length)

Byte 0: 8bit HUD firmware version number
Byte 1: 8bit Status Byte
Byte 2-3: 16bit Sensor1 voltage (in 100µV steps)
Byte 4-5: 16bit Sensor2 voltage (in 100µV steps)
Byte 6-7: 16bit Sensor3 voltage (in 100µV steps)
Byte 8: 8bit Sensor1 ppO2 (in 0.01bar steps)
Byte 9: 8bit Sensor2 ppO2 (in 0.01bar steps)
Byte 10: 8bit Sensor3 ppO2 (in 0.01bar steps)
Byte 11-12: 16bit HUD Battery voltage in mV
Byte 13-14: 16bit Checksum


Status Byte/
Bit0 = 1 -> HUD connection ok
Bit1 = 1 -> HUD is calibrated
Bit2 = 1 -> HUD Battery is low ( Sensor 1 active
Bit4 = 1 -> Sensor 2 active
Bit5 = 1 -> Sensor 3 active
Bit6 = 1 -> HUD calibrated through external interface (DR5)
Bit7 = 1 -> HUD received (valid) data through RS232 input from DR5. Automatically cleared when command was executed

Cheers,
Matthias

[PeterL]

A further question, what's the couple on the end of the cable, I have a usage that needs a shorter cable, I can get the cable but my search skills are failing me on the screw connectors.

[heinrichsweikamp]

The connector is specially designed from us. You can get it from us only.

Regards,
Matthias

[PeterL]

Thanks, is it there a way to order custom lengths? Subject to testing I will need something circa 80CM.

[heinrichsweikamp]

Hi,

Sure, contact us directly: info@heinrichsweikamp.com

Next week is the "boot" dive show. Most of us will be there, so any custom orders will take some time...

regards,
Matthias

[Tjotte]

Hi HW, regarding the fibre port on OSTC3, is there any chance you guys could build, or are already planning to build an air-pressure gauge that goes on normal OC air tanks to get on-screen how much air i have left in bar? It would have to be a second battery powered device connecting to a HP valve on the 1st stage and sending this information through a fibre optic cable to the computor.

Possible or am i just dreaming?

Best Regards, Tommy

[heinrichsweikamp]

Hi,

Sorry for the delay here. No such a device is currently not planed (But technically possible).

regards,
Matthias