ph-203 Digital PH/ORP Controller

The PH and ORP probes in the tank.

Originally Posted by sherman

Just take a look at the PH/ORP controller.The reading now is 198.
Please note that I have not connect up my ozone generator yet.

Regards

ATTN TO ALL USERS OF ORP/PH CONTROLLER,

I have received numerous calls from reefers regarding the ORP readings, ie very low value of 120 - 160 when they initially start the unit. Please note that the probe requires some time to stabilize , as such I would suggest you guyzs to do as follows;

1) Let the probe be immersed in the water for a few days and leave the unit on , observe the value after a few days. ( Pls update me via pm , thks.)

2) In the meantime , do not operate your ozonizer as yet as it will be operating based on a inaccurate ORP value , due to the probe stabilizing in.

Please do not hesistate to contact me shld u have further enquiries. Thank you.

Also , I believe that there is nothing wrong with the units like some have put it, to confirm this , I tested with a newly bought ORP probe tis afternoon and tested a seasoned Milwaukee ORP probe

1) Broadly James Coporation USA ORP Electrode = Immediate reading = 103
mV

2) Seasoned Milwaukee ORP Electrode = 399 - 400mV

3) Tested with my 2 days China ORP electrode = 334mV


so moral of story is u muz stabilize Electrode first.

Originally Posted by sherman

The PH and ORP probes in the tank.

Sherman, leave the Black coloured part out of the water, even though it looks waterproof, don need fully submerged.

Originally Posted by bonjour2

Sherman, leave the Black coloured part out of the water, even though it looks waterproof, don need fully submerged.

OK,Bro. Will get it out of water immediately.

Regards

Like that I think I will connect up the Ozone generator few days later.

Regards

Originally Posted by sherman

OK,Bro. Will get it out of water immediately.

Regards

Ya .. don't let them scuba diving as snorkeling is good enough.

Should the probe be in the sump or main tank?

Hi guys,

I was about to doing a review and found that Sherman has done his..
so, I should hijacck your thread, sherman (don mind hor.)

Okay.. The setup and installation procedure have been covered by Sherman.
Here are some of the statistics:

I have conduct a test with both Milwaukee ORP and PH-203 ORP controller

Here are the finding:
after 3 days into water

Milwaukee/PH-203
391 / 391 with Milwaukee's probe
228 / 228 with PH-203's probe

So, what is this figures tell?? Well, the main unit(body) is acurrately reflect the reading correctly ...cheers!!!
But the Redox from PH-203(probe) is kind of slow in picking up the reading correct....(when I start 3-days ago, my reading was 134). after three day is 222-229.

So, my recommendation to all guys who have set their ORP to 350 or 400 using the original PH-203 probe to reset your setting to 225 (which is around 380 in Milwaukee's probe). until your probe is settle down.

PS: this is also a good test to simulate a "auto-stop" when it hit the pre-define value.

the probe is already calibrated....don't have to recal again for me....i've checked against my PH pen and a 7.0 PH fliud....

not using ozone....but reading is 320.....

Originally Posted by tineng

the probe is already calibrated....don't have to recal again for me....i've checked against my PH pen and a 7.0 PH fliud....

not using ozone....but reading is 320.....

Good. means your ORP probe is calibrating to your water level.