HELP> original neptune controller problem..need

[Chicago]

so i need to get my calcium reactor more fined tuned .. so i decided to break out my old neptune controlle.. seems to work fine.. butt.

one problem.. the ph is showing a constant 6.50.. as if it is not reading it.

solutions please

is there a reset.. is it broken ect. i made sure to turn the ph off and then back on. orp is set to off and so is the temp..

thanks

[kenargo]

It almost sounds like you have the PH probe plugged into the ORP connector? Are you sure the probe is good?

[Chicago]

by the way the probe is the one that ccame with a pinpoint monitor.. its the one i am currently using with the pinpoint \ph monitor. but want to swithc to my old neptune so i can controll the co2. not sure of the model of the pinpoint probe all it says is made in romania.

thanks

[Chicago]

yep .. check the probe and it works on the pinpoint monitor no problem.. calibrated it and checked it against a other ph monitor.. my neptune III ... which controlls the main tank parameters.. thanks

[clp]

If this is an original AquaController, then there are 2 ranges of operation (high - 6.5 to about 11, and low - 3.0 to about 9.0). For Ca reactor operation, you probably want it to be set to low range, and then calibrate the probe with 4.0 and 7.0 pH calibration solution.

Curt

[Chicago]

yep... the simple yet hidden answer.. thank you.. do i feel stupid.. i have only had neptunes for what a decade..

thanks again..