HM Digital in-line TDS meter

I have a problem with my meter, it has two probes, the one coming out of the D I vessel just before the pure hits the Ibc tank, is constantly reading 00r. I’ve tried turning it back on & off still no change. The inline reads fine, that’s just before the membrane. But no joy with the other probe. ??

Jango said:

I have a problem with my meter, it has two probes, the one coming out of the D I vessel just before the pure hits the Ibc tank, is constantly reading 00r. I’ve tried turning it back on & off still no change. The inline reads fine, that’s just before the membrane. But no joy with the other probe. ??

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@doug atkinson should be able to help as he sells them.

I personally would remove the battery, leave it for a while and then put the battery back in and see if that resets it. I've had mine years and never touched it; haven't even replaced the battery. Has it got a reset 'hole'?

spruce said:

@doug atkinson should be able to help as he sells them.

I personally would remove the battery, leave it for a while and then put the battery back in and see if that resets it. I've had mine years and never touched it; haven't even replaced the battery. Has it got a reset 'hole'?

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Thanks Spruce

i will remove the battery and try it. I bought it off Doug. It keeps doing this same thing every couple of weeks, but sick of it now, resorting to testing a cup of water with handheld meter?. Can’t seem to loosen the probes either?. Many thanks will check it out

This happened to me a few months back.

Turned out I’d stretched the wire and it had come apart. Managed to remove some of the outer sleeve of said wire and reconnect it ?

Ok Steve

ill have a look, but I can’t see it been that as it just sits on top, and never moves, but it’s worth a look. I will check tomorrow, not going into garage with all this heavy rain?. What a night. Thanks. 

You may have an air lock in the T Piece hence the 000 reading

@doug atkinson

How do I get that sorted then please, I have tried to get the probe out of the jg connector but unable to budge it. 

Jango said:

@doug atkinson

How do I get that sorted then please, I have tried to get the probe out of the jg connector but unable to budge it. 

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Can be a tricky job and I always get someone the help. 1 person pushing on the collet so it's flush and another pulling the probe.

Quick update. Disconnected the meter. Wiped the probes with pure water, connected it up again, gave figures all over the place to start. Then after I took water from I can tank, started to fill it back up again, the meter finally settled down. So it’s been fine for the last 3 days. Thanks guys. 

Contacted HM digital. They were useless, asked for model number, gave them it, never heard another thing back from them. Bad customer service.