Advanced Airlock does not finish decompression

[Dinosauron]

Hey guys. I built an advanced airlock on mars, 2 doors, console, 2 active vents ending in passive vents into the different atmospheres. This is the entrance to my co2-filled greenhouse.
Setup is complete, airlock works but never finishes any decompression tasks. I enter, push the button, pressure drops to 0, but it does not switch to the pressurize phase.
Manual cancelling lets me pass, but since I'm in multiplayer does mean that the airlock does not work "empty", when there is no one to cancel the cycle.
Any idea whats wrong?

[Dinosauron]

A bit of troubleshooting was unsuccessful.
It seems as if the depressurization does not complete and the airlock is stuck trying to reach a vacuum. I habe no idea, why that could be.
Airlock consists of glass doors, iron walls and celing, on top of a airtight iron frame. We are just working with ~100kPa of Co2 atmosphere, so should be alright.

[Dinosauron]

https://steamcommunity.com/sharedfiles/filedetails/?id=2279359966

https://steamcommunity.com/sharedfiles/filedetails/?id=2279360014

Turns out the console is reading the wrong pressure. This is constantly about half of what the real pressure is (see reading from the suit - real pressure ~80, measured in the airlock ~40). If I look at the gas sensor in the airlock, it reads the correct value.
What could be the source of the problem?

[Dirwood76]

Do you have any gas sensors anywhere else? You may have assigned the wrong sensor to the airlock console. Can you show a screen shot of the gas sensor that's inside the airlock?

[Norseman]

Check List:
Gas sensor enabled
Active vent(s) External enabled
Active vent(s) Internal enabled
Airlock External enabled
Airlock Internal enabled
Pipes from Active Vents to the Passive Vents?
Labelled everything correct? Meaning this will make the system fight against itself etc if you have enabled it wrong because of wrong (opposite labeling)
Have you set the Active vents to the correct External/ Internal in Console?
Have you set the Airlocks to the correct External/ Internal in Console?


Also: Have you adjusted the KPa on Internal and External Atmos to the correct pressure?
(Ambient external and your Internal pressure.)
If not done, the Active vents will push more atmos (Pressure) in to your locked and activated Airlock to build up the pressure to the side you are opening, and that can take a long time.

As Dirwood76 said, make sure you have the correct Gas Sensor, use an Area Power Controller to isolate the Airlock network.

Hope this helps!

EDIT: I see you have an Area Power Controller installed, so disregard the last one ;)

[Dinosauron]

Thanks for the advice.
Went through your checklist and everything is done just like that. Checked for bugs etc.
The cycle works, CO2 is pumped back to the hydroponics room, outside pressure is built up. But it does not auto-finish without a user canceling some steps.

Problem seems to be between gas sensor and the console.
You can see it in the screenshots:
Console reads 40 kPa, but suit shows its actually 77kPa.
Second one: 1 kPa, but suit shows its 0 kPa.
We checked the values from the attached gas sensor with a logic reader, the sensor reads the correct data (same as the suit). The console just does not work properly.
What could that be?

[♔ןoן♔ sardukar]

Sometimes its worth making a new circuit board. Not sure if its a bug or not.

[DeadMechGaming]

Could also be placement of your sensor. I typically place my sensor the exact opposite of my vents. So if my vents are on the left wall and top of the wall, my sensor is on the right wall and on the bottom. Seems to make the airlock reach vacuum easier.

Also, I split every system off with a Power Control Unit (every airlock, every room, etc.). Prevents any other sensors in the base from accidentally being on a circuit it's not supposed to be on; also give the added bonus of if there is any power loss in the station I can still use airlocks and anything else I need to as long as the batteries in them have power.

Unfortunately, you'll still end up with some gasses getting mixed even with these precautions, so the best bet is to have your environmental system set up to constantly circulate the air non-stop through your filtration network. Added bonus for this is you'll have to use less heaters and coolers to keep a decent temperature in your base as long as the air in the pipes is kept at the right temperatures (especially now since we have insulated pipes), and if you are playing on a MP server then it won't matter how many or how few people you have as the air will always be at a perfect mix.

Hope some of this helps.

[Norseman]

Originally posted by Dämonenbär:

Console reads 40 kPa, but suit shows its actually 77kPa.

That can be the distance between gas sensor and your character (Suit pressure reading).
How big is your airlock?

Originally posted by Dämonenbär:

Second one: 1 kPa, but suit shows its 0 kPa.

That is such a small difference so that don't really mean anything, what means something is the fact your airlock stop pumping in the pressure you want.


I'll ask again, sorry!: Have you adjusted for the pressure on the in and out in console when you insert your data disk?

On Mars, I set external to 2KPa and the inside pressure to what I have (Or want if you like) in pressure.
On Moon or vacuum I set it to 0KPa, obviously..

I really would like to see your save and test it for myself.
It has to either be a bug or something you have forgotten or overlooked ;P

Can it be you use more than 1 Gas sensor?
In that case you only use ONE, in the airlock itself.
Questions:
1. Airlock size?
2. How many Active vents on each side?
3. What is your internal and external pressure set to in Console?

[Xuhybrid]

If you have more than a 1x1 you want a sensor in every block in the airlock. The console seems fine having multiple selected and it averages the pressure of multiple sensors. This way it will actually get the whole room to 0 before cycling. That's all assuming you have a larger than 1x1.

[Dinosauron]

It's 1x1, but I will check all the other stuff when we resume the game.

[Norseman]

Originally posted by Xuhybrid:

If you have more than a 1x1 you want a sensor in every block in the airlock. The console seems fine having multiple selected and it averages the pressure of multiple sensors. This way it will actually get the whole room to 0 before cycling. That's all assuming you have a larger than 1x1.

You can, but hardly is the issue here.
Hence my tip to use one gas sensor IN the airlock to problem check his issues :)

I use just one for even advanced airlocks and they vent fast. (Set it in center always)
I'm talking about 1x1 and 1x2 airlocks.

[spinglass]

I just had a very similar sounding issue, albeit with the basic airlock - turned-out I had left the welding torch turned on in my tool belt. It was generating just enough pressure for the sensor to detect.