Apex Neptune Salinity Probe Help

[tthnow]

How the heck do I read it? I calibrated from the instructions, but how do I read it? I know my salt content at the moment is 1.023 with the instant ocean hydrometer.

On the web interface I have 2 items, tmpx4 23.5 and condx4 33. Is it the tmpx4 my salt content? thank you in advance. I do not have a temp probe connected to pm2 module.

 

[thegrun]

Here is the conversion chart:


mS ‰ Salt (ppt) True Specific Gravity

42.5 27.30 1.0200
43.0 27.70 1.0203
43.5 28.10 1.0206
44.0 28.40 1.0209
44.5 28.80 1.0211
45.0 29.20 1.0214
45.5 29.50 1.0217
46.0 29.90 1.0220
46.5 30.20 1.0222
47.0 30.60 1.0225
47.5 31.00 1.0228
48.0 31.30 1.0231
48.5 31.70 1.0234
49.0 32.00 1.0236
49.5 32.40 1.0239
50.0 32.80 1.0242
50.5 33.10 1.0245
51.0 33.50 1.0248
51.5 33.90 1.0250
52.0 34.30 1.0253
52.5 34.60 1.0256
53.0 35.00 1.0259
53.5 35.40 1.0262
54.0 35.70 1.0265
54.5 36.10 1.0268
55.0 36.50 1.0270
55.5 36.80 1.0273
56.0 37.20 1.0276
56.5 37.60 1.0279
57.0 38.00 1.0282
57.5 38.30 1.0285
58.0 38.70 1.0288
58.5 39.10 1.0291
59.0 39.50 1.0294
59.5 39.80 1.0296
60.0 40.20 1.0300

 

[disc1]

On the web interface I have 2 items, tmpx4 23.5 and condx4 33. Is it the tmpx4 my salt content? thank you in advance. I do not have a temp probe connected to pm2 module.

I would think temperature would be tmp and conductivity would be cond. I mean they might have done that the other way round but it sure makes a lot more sense to do it where you're using basically the same letters.

If it is reading in units of conductivity then you are looking for 53mS.

 

[ca1ore]

Apex assigns a buss number (in your case 4) with two probe values, temperature (Tmpx) and conductivity (Conx) on the PM2 module. Conductivity measured in ppt at 33 equates to 1.024 and change. Tmpx will read a funny number if you don't have a probe connected. I'd suggest moving your temp probe to the PM2 module as you can still use it for tank control but also have it function as compensation for the conductivity levels.

 

[tthnow]

Thank you so much for the chart. How would I be able to control the temp if install this on the PM2? I look trough the web interface and was not able to found the control for that. I am assuming I need a total separate temp probe?

 

[ca1ore]

If you install your temp probe on the PM2 rather than the Apex base unit you just have to change any outlet commends to reference 'Tmpx4' rather than 'Temp'. If you decide to get a second temp probe, then you can control two separate tanks.

 

[bpseal]

Well said, thanks for the info bro

 

[champion6sigma]

I recommend reading the manual and looking at the bulk reef video on how to calibrate. U should have temp and conductivity probes on the pm2 and u must change the compensation temp once u do that. It's more accurate way. The condx3 or tmpx3 should be listed with same bus number once they r on same epm2 module. Important to change heater auto settings to work of temp of new bus I'd once the change is made. Plus any other commands which utilized ur temp probe. Bulk reef video is best see that

 

[champion6sigma]

I put mine on salinity mode rather than high. The manual explains the range values for salinity vs high!, but either r used on salt water tanks. That chart above is awesome!

 

[champion6sigma]

I keep my salinity lower such as 1.022 and 1.023. What many lfs use. There is no spike in salinty for water loss through evap. There's other reasons too according to my book. I just installed my probe yesterday. I might oncrease baseline a little and monitor how quick changes r in salinity

 

[Member No. 1]

If you install your temp probe on the PM2 rather than the Apex base unit you just have to change any outlet commends to reference 'Tmpx4' rather than 'Temp'. If you decide to get a second temp probe, then you can control two separate tanks.

To expand on this, I have 3 temp probes, in tank, in sump, and ambient room air temp.

 

[champion6sigma]

Interesting...ambient temp. I could run 3 I think. I'm considering running a tank one but I don't like idea of having more external stuff in display. Or having a wire go over rear of glass wall

 

[ca1ore]

To expand on this, I have 3 temp probes, in tank, in sump, and ambient room air temp.

Since my post 2 plus years ago, I have also added a third. I now measure main tank, water change vessel and my primary QT tank.

 

[Member No. 1]

Since my post 2 plus years ago, I have also added a third. I now measure main tank, water change vessel and my primary QT tank.

I didn't even see how old this thread was till you posted.

 

[RayAllen3422]

I didn't even see how old this thread was till you posted.

How do you have a third probe? Which module does it go into?

 

[Member No. 1]

How do you have a third probe? Which module does it go into?

Base unit - Tank temp
PM1 used for pH of Ca reactor - Ambient room air temp
PM2 used for salinity/conductivity with temp compensation turned on - Sump temp

 

[RayAllen3422]

Base unit - Tank temp

PM1 used for pH of Ca reactor - Ambient room air temp

PM2 used for salinity/conductivity with temp compensation turned on - Sump temp

Gotcha. I bought the apex gold system so I only have 2 temperature probe spots.