I'm installing a Klima ufh mat and following their instructions, taken basic measurements before install when my sparky will then test and connect the power circuit after the floor is tiled.
Their instructions say to use a multimeter and write down the readings. There are two power cables and a sheathed earth. In the description it says "take the readings with a multimeter and write down the readings on the test card". "Take measurements both between the resistance wires and between the resistance wire and the earth cladding. The last one should always read open circuit. If not: STOP immediately and call the technical helpline on 01887 822 020".
As an experienced electrical/electronics engineer, this makes complete sense. It didn't ask for a megger insulation test, simply a resistance test. I've got 144 ohms across the resistance wires and open circuit between each resistance wire and earth. Any yet their test card says the reading should read "0".
I rang them to query the typo and they were robustly defensive and said there was no mistake in the brochure and that every multimeter they had ever used read zero for open circuit!
Great, I said, so how does a short circuit read on your meter. "There shouldn't be a short circuit, it should be open circuit and read zero". I asked if they were using an MFT, they said "no, a standard multimeter and it should read zero for an open circuit. We are the manufacturers and this is how we measure it".
Am I being stupid here? I'm surprised they haven't had other calls about it. Please put me out of my misery and tell me what I have failed to understand?
Their instructions say to use a multimeter and write down the readings. There are two power cables and a sheathed earth. In the description it says "take the readings with a multimeter and write down the readings on the test card". "Take measurements both between the resistance wires and between the resistance wire and the earth cladding. The last one should always read open circuit. If not: STOP immediately and call the technical helpline on 01887 822 020".
As an experienced electrical/electronics engineer, this makes complete sense. It didn't ask for a megger insulation test, simply a resistance test. I've got 144 ohms across the resistance wires and open circuit between each resistance wire and earth. Any yet their test card says the reading should read "0".
I rang them to query the typo and they were robustly defensive and said there was no mistake in the brochure and that every multimeter they had ever used read zero for open circuit!
Great, I said, so how does a short circuit read on your meter. "There shouldn't be a short circuit, it should be open circuit and read zero". I asked if they were using an MFT, they said "no, a standard multimeter and it should read zero for an open circuit. We are the manufacturers and this is how we measure it".
Am I being stupid here? I'm surprised they haven't had other calls about it. Please put me out of my misery and tell me what I have failed to understand?
