HUD 4PIN AK connection

Monitoring device for the O2 partial pressure in Closed-Circuit Rebreathers

Up to three sensors can be hardwired to the unit. As long as they have a common GND, all sensors normally used in CCR devices are compatible

Very compact HUD

To display the partial pressure of O2 a very simple blink-code is used which is updated and repeated every five seconds

This heads up display is a little different from all that went before... The fantastic 3 cell simultaneous monitoring from the shearwater electronics encased in the slim line narked housing and wired via the Narked at 90 3 cell monitoring kits. This means you buy a basic HUD fitted with a 4PIN AK connector as standard. From this point you have a range of options for connection to a Rebreather.

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This Monitors three sensors and displays the PPO2 on three LEDs. Each of the connections corresponds to an LED on the display. Each LED is a dual colour LED. It can show red, green, or orange (both red and green on.)

There is a button on the box and it controls the HUD. One push turns it on and one push turns it off. Three pushes calibrates. If, when you turn it on, you get orange flashing for 30 seconds, that indicates a low battery.

To calibrate, you need to push the button three times within 1 second. It might take a little practice to get this, but it is intended to prevent accidental calibrations. If you successfully do the calibrate sequence, all three lights will come on bright red for 5 seconds. If you don't see that, it didn't get the calibration command.

After you calibrate, each of the sensors should be flashing one orange. That means the ppo2 is between 0.95 and 1.05. The actual value is uses for calibration is .98. If a sensor fails calibration, it will flash one red and one green.

The rest of the flash pattern is: The number of greens is the number of tenths above 1.0 so three green is 1.3 ppo2. The number of reds is the number of tenths below 1.0 so two red is 0.8

The box contains the processor and battery. To change the battery, unscrew the battery cap. The battery should last for months or even years. The battery is a 3.6 V Lithium -SAFT LS14250-BA

The HUD box straps or bolts onto the breathing hose up beside your head or the rebreather case so it is completely out of the way.

Read more: https://www.narkedat90.com/molexhud-molex-hud.html#ixzz8NCEakgAo