Zitat von »Speedy-VI«

I don't have a solution for getting your D5 Next Virtual Flow Sensor calibration to work, but I can tell you how my calibration went, and what I did to get around it.

My D5 Next Virtual Flow Sensor calibration sort of worked. My loop uses 3/8" ID x 5/8" OD Flexible PVC tubing and has 2 x High Flow Next flow sensors. I used a stop valve instead of kinking the tubing closed for the calibration. After calibration, the D5 Next virtual flow rate was always lower than what either High Flow Next reported. The Average difference was 46 L/Hr, Min 21 L/Hr, Max 68 L/Hr. Most concerning was that the D5 Next Virtual Flow Sensor reported 0 L/Hr flow for any pump power value below 28%. At 28% pump power, High Flow Next #1 reported 180 L/Hr. High Flow Next #2 reported 185 L/Hr. If I ran the pump at 27% power or lower and enabled the flow alarm on the D5 Next, the alarm would activate because the D5 Next Virtual Flow Sensor was reporting 0 L/Hr flow. I asked Aquacomputer about this. Their response was the D5 Next Virtual Flow Sensor is not accurate, and sometimes just does not work at all. They reminded me that the D5 Next manual says its only intended to indicate flow/no flow. Since the D5 Next Flow Rate Alarm is based on the Virtual Flow Sensor value, the Flow Rate Alarm was useless.

I gave up on the D5 Next Virtual Flow Sensor and decided to send the flow rate from one of the High Flow Next flow sensors to the D5 Next. Strangely, you cannot do this in Aquasuite for several reasons. To get flow rate data from a High Flow Next to the D5 Next, I bought cable #53294 and connected it to the Signal header on a High Flow Next and the Fan/Flow header on the D5 Next. The High Flow Next Signal output is set to "Generate high flow sensor #53068 signal (DP Ultra, Inner Diameter <7mm)”. The D5 Next Fan/Flow second sensor is set to Sensor Type Aquacomputer high flow #53068. This worked, but the flow rate numbers reported by the D5 Next were much lower than the High Flow Next. When I asked about this they told me that they had they changed the calibration values in Aquasuite but had not updated the D5 Next firmware to match. Further, they would not update the D5 Next firmware just to fix this problem so it would have to wait until they had to update the D5 Next firmware for some other, more important reason. They finally did this when they released Aquasuite X.78 and the new D5 Next firmware that came with X.78. Now when I set the High Flow Next Signal port to emulate flow sensor #53068 and set the D5 Next flow sensor to the same, the flow rate numbers match what the High Flow Next reports.

Zitat von »Speedy-VI«

Zitat von »1st.boss«

I've already decided to order a better pump for myself,

I am curious what pump you are going to order. The D5 Next is a D5 pump with a controller board and I/O added by Aquacomputer. The D5 is generally considered the best pump for computer custom cooling loops. There is the Eheim 1250 and the Aquastream Ultimate, which I think is based on the Eheim 1046 centrifugal pump, but they are both Aquacomputer products. Alphacool sells the Eheim 2400. Are you planning to get one of these pumps?

Zitat von »Speedy-VI«

There are some great deals on AliExpress, I live in the US and buy a lot of stuff from them - Mainly various micro-controllers, sensors, test equipment, tools, cables, and adapters. My AliExpress rules are nothing that goes in or on my body, and no flash drives or GaN chargers. I had not looked at pumps. I just searched for "Computer Pump" and "Cooling Pump". There were AlphaCool, Barrow, Bykski, and FreezeMod pumps but the prices were not much less than US distributors. They also had a bunch of NIdec pumps. I did not see any with a temp sensor or a display. Can you provide some links to the pumps you found with power adjustments and temperature displays?

Zitat von »Taubenhaucher«

The virtual flow meter is a calculated value that doesn’t even come close to reality and doesn’t work at all below a flow rate of 80 l/h; furthermore, the pump must run at a minimum of 3000 rpm. It is important to note that the coolant flow must be interrupted for calibration; for hard tubes, this would require a ball valve in the loop that must be closed during calibration.
Common pumps such as the Eheim, D5, and DDC all come from applications where longevity is key.
Here is an excerpt from the Laing D5 data sheet:
Applications: e.g., circulation systems in plant engineering,
medical technology, computer and laser cooling; hot
water heating systems in trailers, weekend homes, and
boats (battery- or solar-powered); pond and aquarium
technology; service water circulation and storage tank charging systems;
The Eheim comes from the aquarium industry.
I would always prefer the D5 over an unbranded pump, like the ones on AliExpress, because it lasts forever and just works.

Translated with DeepL.com (free version)

Zitat von »Speedy-VI«

No worries about using Google Translate. I use it to post on the Aquacomputer German forum, and to translate Chinese into English for some products that I buy on AliExpress. AI translation/interpretation has gotten very good.

I have never used FreezeMod products but they look OK. I don't know how the pumps compare to a D5, but the price is about half what an Aquacomputer Ultitube D5 200 costs. A computer cooling loop pump does not need all the bells and whistles (extra features) that Aquacomputer adds to the D5 Next, but most of them are useful. The Virtual Flow Sensor is useless in my opinion, which is why I decided to buy the cable to connect a High Flow Next to a D5 Next.