Milwaukee Instrument Ph monitor/controller SMS122

Left C · 11-23-2008, 04:00 AM

From: http://www.milwaukeetesters.com/pdf/...120-SMS122.pdf

RANGE 0.0 to 14.0 pH
RESOLUTION 0.1 pH
ACCURACY (@25°C) ±0.2 pH
SETPOINT 5.5 to 9.5 pH
ALARM active when measure is higher than selected setpoint.

I'm glad that you got it going with fishyface's help. I've been watching Oklahoma (#5) really whipping Texas Tech (#3) in the first half. 42 to 7!

Can you put the slope adjustment that you tried back to the original setting if you have problems?

I think that Milwaukee should include in their instructions on their site about not adjusting the slope for aquarium use. These are the extra directions that come with the controller:

Please Note:

Because the SMS122 is used primarily in an aquarium environment we strongly recommend that your unit be calibrated at the pH 7.0 position only. We have included just a starter pack of pH calibration solution 7.01. If your application needs require calibration solution for the Acid or Alkali ends of the pH scale please let us know and we will provide the proper calibration solution.

With your 5 dKH water, setting the controller on 6.7 yields ~ 30 ppm of CO2 and a setting of 6.8 yields ~ 24 ppm of CO2. Either of these settings should work well for you.

Dang! the score is 58 to 14 at the end of the 3rd quarter. Gotta go.

hani · 11-23-2008, 05:19 PM

It happens to me evrey year, the only way to fix it is to get anew prop, they usualy last between 8-12 month

**Complexity** · 11-23-2008, 06:58 PM

I had no idea the probes needed replacing that fast.

How do you know when it's time to replace one that's actively being used in a tank?

**Stevie D** · 11-23-2008, 07:12 PM

When it can't reach a ph of 10 or 4 or when it has a hard time stabilizing is usually when they are going bad. About a year give or take depending on how well the probe was taken care of. I think that probe you have is bad.

I've had good luck with the pinpoint and heard they last the longest for the price. You can get one for less than $50. They need to be cleaned at least monthly, and should be calibrated often as well. I usually calibrate mine once a month. Not so much when the probe is new.

Stevie D

11-23-2008, 04:00 AM	#16 (permalink)
Left C Planted Tank Guru (View User Tanks) PTrader: (17/100%) Join Date: Nov 2003 Location: Burlington, NC Posts: 4,826	From: http://www.milwaukeetesters.com/pdf/...120-SMS122.pdf RANGE 0.0 to 14.0 pH RESOLUTION 0.1 pH ACCURACY (@25°C) ±0.2 pH SETPOINT 5.5 to 9.5 pH ALARM active when measure is higher than selected setpoint. I'm glad that you got it going with fishyface's help. I've been watching Oklahoma (#5) really whipping Texas Tech (#3) in the first half. 42 to 7! Can you put the slope adjustment that you tried back to the original setting if you have problems? I think that Milwaukee should include in their instructions on their site about not adjusting the slope for aquarium use. These are the extra directions that come with the controller: Please Note: Because the SMS122 is used primarily in an aquarium environment we strongly recommend that your unit be calibrated at the pH 7.0 position only. We have included just a starter pack of pH calibration solution 7.01. If your application needs require calibration solution for the Acid or Alkali ends of the pH scale please let us know and we will provide the proper calibration solution. With your 5 dKH water, setting the controller on 6.7 yields ~ 30 ppm of CO2 and a setting of 6.8 yields ~ 24 ppm of CO2. Either of these settings should work well for you. Dang! the score is 58 to 14 at the end of the 3rd quarter. Gotta go. __________________ EHEIM PIMP #164 Classic 2011, Classic 2213, Classic 2217, ECCO 2236, Pro II 2028, Liberty 2040, Liberty 2042 VICTOR PIMP #1 VTS253A-1993, VTS250B-580, VTS253D-320, HPT500-40-350-4M, SGT500-40-4F-DK

11-23-2008, 06:58 PM	#18 (permalink)
Complexity Pelvicachromis Lover! (View User Tanks) PTrader: (22/100%) Join Date: Jan 2008 Location: Sugar Land, TX Posts: 2,891	I had no idea the probes needed replacing that fast. How do you know when it's time to replace one that's actively being used in a tank? __________________ Vicki —Filstar pimp #142 (XP4/XP2/XP2) • Eheim pimp #301 (Pro II 2128) • Victor pimp #27 (VTS-253B-320) • 2.5 Nano Journal Torn down for now. • 5g Tank No journal yet. RCS colony. • 29g Tank Journal New Pics 3-19! Getting BBA and Clado under control. • 75g Tank Journal Pics posted on 3-26 No updates for now, but all is well.

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11-23-2008, 05:19 PM	#17 (permalink)
hani Algae Grower (View User Tanks) PTrader: (0/0%) Join Date: Oct 2007 Location: canada Posts: 9	It happens to me evrey year, the only way to fix it is to get anew prop, they usualy last between 8-12 month

11-23-2008, 07:12 PM	#19 (permalink)
Stevie D Planted Tank Obsessed (View User Tanks) PTrader: (2/75%) Join Date: Jul 2008 Location: Cambridge, Ma Posts: 300	When it can't reach a ph of 10 or 4 or when it has a hard time stabilizing is usually when they are going bad. About a year give or take depending on how well the probe was taken care of. I think that probe you have is bad. I've had good luck with the pinpoint and heard they last the longest for the price. You can get one for less than $50. They need to be cleaned at least monthly, and should be calibrated often as well. I usually calibrate mine once a month. Not so much when the probe is new. Stevie D

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