Apex Temperature Compensation and PH probe question

[chef jeff]

Setting up my Apex and have a couple of questions:

1. Is everyone using temperature compensation? Any thoughts appreciated.

2. Is initial calibration of the PH probe necessary? I assumed it was. However, the controller is replacing a Pinpoint stand alone PH monitor that I recently calibrated. When I compared the two readings, they were identical. Calibration is no problem. I was just wondering if I was working under a faulty assumption that the probe required an initial calibration.

Thanks.

 

[heyitsmirix3]

1. What do u mean temp compensation? My fan and heater work 2 degrees off each other ( ie fan comes on at 81 shuts off at 79, heater comes on at 75 goes off at 77. Everything is off at 78-80) I don't mind that much of variance and nether does my coral.

2. Always calibrate. I don't know why you wouldn't . I do it once every 3 months. Fluid is like 0.25 dollars I stock it up.

 

[redstang]

Heyitsmirix3;699722 wrote: 1. What do u mean temp compensation? My fan and heater work 2 degrees off each other ( ie fan comes on at 81 shuts off at 79, heater comes on at 75 goes off at 77. Everything is off at 78-80) I don't mind that much of variance and nether does my coral.

2. Always calibrate. I don't know why you wouldn't . I do it once every 3 months. Fluid is like 0.25 dollars I stock it up.

I think he's asking if we use temp compensation on the temp probe, essentially calibrating it, or leave it be. I adjusted mine a little bit.

 

[reefkeeper]

As per the Apex documentation all new temp probes have been calibrated. As for the PH probes. You will need to calibrate any PH probe you use on the Apex.

 

[chef jeff]

Heyitsmirix3;699722 wrote: 1. What do u mean temp compensation?

Yep, I should have been more clear. The setup of the PH probe allows for an automatic temperature compensation to either be enabled or disabled. I was wondering whether anyone had noticed any positive or negative effects of implementing this compensation. As most of us maintain the temperature to a close tolerance, I questioned its necessity.

 

[Jaycen B.]

Page 28 & 29 in the setup and programmingn guide will answer that question. I use it, do not know if it relly matters though. It takes a large temp swing to make the ph read off.

 

[schwaggs]

Temp compensation on pH probes not really needed with our systems. We don't see enough variation in our systems to make a difference.

You should calibrate your pH probe since you moved it to another controller. When you calibrate, you are calibrating the probe and controller circuit together.

 

[dme330i]

I set up my Apex 2 weeks ago and do not use the temp compensation feature for pH.

IMO, not necessary as the compensation is negligible, considering the focused range of temperature in our tanks. For example - A pH of 8.20 at 77 degrees would be 8.19 at 75 degrees and 8.21 at 79.

Jon

 

[chef jeff]

Schwaggs;699811 wrote:
You should calibrate your pH probe since you moved it to another controller. When you calibrate, you are calibrating the probe and controller circuit together.

New controller and probe. The readings of the new Apex and new probe just agreed with the readings of the old, but recently calibrated controller out of the box, which I found interesting.