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CCR Pod CAN Bus AK5 Manual

Welcome to the short manual for the CCR Pod CAN Bus AK5.

Sive View

This device enables a wireless connection to a rebreather and a SYMBIOS Dive Computer. It can connect to up to 3 O2 sensors. Those O2 sensors may be either galvanic O2 sensors with a nominal output voltage of 8-15mV @ 0.21 bar pO2 or a GREENFLASH po2 sensor in analog mode.

USPs

  • Wireless pO2 sensor readout
  • Connects to rebreathers with CAN bus, for example to the HUD port of a JJ rebreather
  • Wireless bridge to SYMBIOS Dive Computers
  • Transmission of mV

Specifications

  • Battery: no battery, powered by the battery of the CCR head
  • The supply voltage on the can bus should be between 3.3 and 4.3V
  • Size: 90 mm length, 40 mm diameter
  • Weight: ~110 g
  • Frequency: 125 kHz
  • transmission range: up to 90 cm
  • transmission method: magnetic
  • transmission interval: once per second

Power Management

The Device is powered by the battery of the CCR head. The device is actuated with water contacts. The device will go into standby mode, once the water contacts are dry.

Preparation

  • Read the manual of the dive computer and get familiar with its operation.
  • Switch the dive computer to CCR mode:
    ➔menu➔SETTINGS➔DIVE MODE➔CCR MODE
  • Activate the device by changing the pO2 in front of sensor 1 or 2.
  • Pair the device:
    ➔menu➔SETTINGS➔PAIRING➔CCR INTERFACE
  • Set the correct fraction of the calibration gas:
    ➔menu➔SETTINGS➔CCR SETTINGS➔FO2 CAL GAS
  • Flush the sensors with calibration gas.
  • Enter the calibration menu: ➔menu➔SETTINGS➔CCR SETTINGS➔CALIBRATE CCR
  • Confirm the mV readings by a long press of button 2.

A calibration is accepted when the output of the sensors is between 38 and 80mV @1bar pO2. If you use less than 3 sensors, disable the sensor that are not used: ➔menu➔SETTINGS➔CCR SETTINGS➔PO2 SENSORS

Only enabled sensors are used for pO2 warnings, decompression and CNS calculation.

Diving

The average of the enabled pO2 sensors is used to calculate tissue on/off gassing, decompression schedule and TTS forecast and CNS%. TTS and deco stop forecast is based on the current loop pO2. The claculated loop pO2 is the average of all enabled sensors, as long as the sensors are within 20% of the average. Otherwise, the lowest pO2 value is used for decompression and the highest for CNS% calculation.

Warnings

Warning pop ups and vibration alarms inform the diver about dangerous sitations, like too high or too low pO2. Warnings can be confirmed by pressing both buttons long.

Bailout mode

By pressing the 2nd button long, one can toggle between CCR mode and Open Circuit bailout mode. In Open Circuit bailout mode, the first activated gas is the currently selected diluent gas.

Toubleshooting

Pairing not possible

  • activate the wireless screen (setting ALL) to see if the transmitter is sending data
  • enable the transmitter by changing the pO2 at the sensor (at least 10s)
  • check the battery voltage / replace battery

Calibration failed

  • check the sensors
  • disable sensor channels that are not used
  • check the setting of the fraction of the calibration gas