Kh keeper weirdness

[Aquariumaddictuk]

I'm struggling with my kh keeper

Having calibrated & primed the pumps it's doing a peculiar thing during manual testing.
The aquarium pump is rotating the wrong way & remove all tank water from line & just spinning.
To be frank it's blowing when it should be sucking.
Am I missing something here?
This oddity has this old dinosaur utterly puzzled!

 

[Dan_P]

I'm struggling with my kh keeper

Having calibrated & primed the pumps it's doing a peculiar thing during manual testing.
The aquarium pump is rotating the wrong way & remove all tank water from line & just spinning.
To be frank it's blowing when it should be sucking.
Am I missing something here?
This oddity has this old dinosaur utterly puzzled!

Switch the tubes around. Maybe inlet andoutlet are mixed up. By the way dinosaurs are cool.

 

[DanyL]

It might indeed be configured mistakingly in the wrong direction.
However, the sample line does need to push out old sample water before taking new sample, and to make sure there’s no old water left in the line, many auto testers would keep running the pump in reverse for quite awhile.

Some devices do have a configurable sample line length which would influence the time it takes to clear it up and take a new sample - if yours have such setting you may want to ensure it is configured correctly.

 

[Aquariumaddictuk]

It was me.
I found a parkers reef video that does indeed show it purges initial old sample via aquarium in pump.
Calibration took quite a few attempts & a little fudging of numbers to hit the 5ml & 49.5ml-50.5ml samples respectively.
I've gone way over the manufacturer's 3-4 hour setup timeframe but that could be more a reflection on me than the unit.
I still drive a car that has a cd changer in the boot

 

[gbroadbridge]

It was me.
I found a parkers reef video that does indeed show it purges initial old sample via aquarium in pump.
Calibration took quite a few attempts & a little fudging of numbers to hit the 5ml & 49.5ml-50.5ml samples respectively.
I've gone way over the manufacturer's 3-4 hour setup timeframe but that could be more a reflection on me than the unit.
I still drive a car that has a cd changer in the boot

You get used to doing it.

Takes me about 10 mins to do a full pump calibration

Having said that, the pumps really don't drift much after the first 12 months.

BTW, the 'return water' setting makes the pump operate in reverse to pump back the water after the test using the sample line (with the filter).
So you can either return using waste line, or the sample line.

 

[Aquariumaddictuk]

Still no joy.
A full reset and a new calibration.
All volumes are correct.
All pipes are correct.
The reagent was made AGAIN using digital scales.
It completes a test, turns red and gives the same "reagent out" message every time and the 15dkh reading.
Ugh.

 

[gbroadbridge]

Still no joy.
A full reset and a new calibration.
All volumes are correct.
All pipes are correct.
The reagent was made AGAIN using digital scales.
It completes a test, turns red and gives the same "reagent out" message every time and the 15dkh reading.
Ugh.

Did you check the reagent against a Salifert test?
Check ph reading after calibration?

 

[Aquariumaddictuk]

Did you check the reagent against a Salifert test?
Check ph reading after calibration?

I haven't no.i haven't used salifert for a long time apart from their potassium test.may I ask the procedure?
I'd try anything at this point

 

[Aquariumaddictuk]

Did you check the reagent against a Salifert test?
Check ph reading after calibration?

pH reading is very close to my reef factory pH meter

 

[gbroadbridge]

I haven't no.i haven't used salifert for a long time apart from their potassium test.may I ask the procedure?
I'd try anything at this point

It's in the khk user manual.

You measure the Alk using the salifert dye and the mixed khk reagent and compare against a standard salifert test.

It validates the dilution of the reagent.

 

[gbroadbridge]

pH reading is very close to my reef factory pH meter

I mean that after you have calibrated the probe, using the check ph button to measure the ph of the calibration solution again, to check the probe has calibrated correctly.