Lifeguard pH inaccurate

Lifeguard™ - Reports key tank parameters
tlafreniere
Posts: 7
Joined: Fri Sep 28, 2012 4:20 pm
How many years have you been in the hobby?: 7

Lifeguard pH inaccurate

Postby tlafreniere » Sun Jan 13, 2013 7:33 am

I have two Lifeguards on two separate systems. They both read the pH higher than it really is. I have calibrated them several times but the issue remains.

I tested them side by side with a pH Pinpoint Monitor, API test kit and Salifert test kit.

Lifeguard #1 8.43
Lifeguard #2 8.42
PinPoint 8.22
Salifert 8.2
API 8.2

Is this correctable?

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n2585722
Posts: 6093
Joined: Mon Sep 08, 2008 5:54 am
How many years have you been in the hobby?: 30

Re: Lifeguard pH inaccurate

Postby n2585722 » Sun Jan 13, 2013 8:01 am

Have you tried placing the probes in a cup or glass of tank water to see if the readings are still off?
thanks,
Danny

tlafreniere
Posts: 7
Joined: Fri Sep 28, 2012 4:20 pm
How many years have you been in the hobby?: 7

Re: Lifeguard pH inaccurate

Postby tlafreniere » Fri Jan 18, 2013 8:34 pm

n2585722 wrote:Have you tried placing the probes in a cup or glass of tank water to see if the readings are still off?


Yes I have and they are still off. The long term graphs also do not work reliably. I am very disappointed with them.

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DA_Dan
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Joined: Mon Aug 29, 2011 12:49 pm
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Re: Lifeguard pH inaccurate

Postby DA_Dan » Fri Jan 25, 2013 11:22 am

If your Lifeguard is not reading accurately after several calibrations, please send a message to support@digitalaquatics.com and can open a case to get this resolved for you!

Thanks!
Please E-mail us if you have any specific questions or need assistance:

support@digitalaquatics.com

Thanks!

chuckytt
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Joined: Mon May 23, 2011 12:14 pm
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Re: Lifeguard pH inaccurate

Postby chuckytt » Mon Mar 25, 2013 3:43 pm

Was this ever resolved? Mine was sent with a bad pH probe, that wouldn't calibrate. Got a new one and it calibrated, but read really high around the 8.6 8.8. Can DAs customer support fix the issue?

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n2585722
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Re: Lifeguard pH inaccurate

Postby n2585722 » Wed Mar 27, 2013 6:26 pm

What does it read in the pH 7 and pH 10 solution after the calibration?
thanks,
Danny

isaaccs
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Re: Lifeguard pH inaccurate

Postby isaaccs » Fri Dec 05, 2014 11:31 am

I have the same problem.

Immediately after I complete calibration, if I place the probe back in the ph7 solution, the ph reading will be 7.11.

I've tried multiple probes and tried to calibrate several times.

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n2585722
Posts: 6093
Joined: Mon Sep 08, 2008 5:54 am
How many years have you been in the hobby?: 30

Re: Lifeguard pH inaccurate

Postby n2585722 » Fri Dec 05, 2014 7:19 pm

First question is how old is the probe? If it is new place it in the tank a few days before you calibrate it. Also try leaving it in each solution for about 10 minutes before pressing the button to continue with the calibration. This gives the probe time to get to temp of solution.
thanks,
Danny


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