FAQs for AquaChek® TruTest™ Test Strip Reader Q: What can I expect for the precision of the test parameters? A: The precision of the unit can be reported as the following:
It can be noted that as with any test, technique consistency will improve precision results.
- Free Chlorine, 0-1ppm range +/- 0.3ppm : 3-10ppm range +/- 1ppm
- pH, entire range +/- 0.1pH
- Total Alkalinity, entire range +/-30ppm
| Q: What is the dynamic test range for the TruTest? |
It should be noted that the “Er” messages will be displayed when testing pool samples outside of these calibrated test ranges (reference in the manual).
- FC, 0-15ppm
- pH, 6.1-8.8
- TA, 0-300ppm
| Q: Can I compare the TruTest results to other test methods? |
A: The accuracy of the unit should only be compared to visual test methods. This is because the unit is capable of reporting numerical results between colorblocks and therefore the unit can be considered to be more accurate than a visual colorimetric evaluation (involving both human interpretation and interpolation). Digital readout in place of color interpretation is TruTest’s main benefit resonating with many pool/spa owners.
| Q: The pH or Total Alkalinity reading on my AquaChek TruTest Digital Test Strip Reader is higher than expected (or compared to other test methods). Why is this? |
A: This difference is likely due to technique. To reduce this variation, be sure to press the START button on your Aquachek TruTest Digital Test Strip Reader at the same time you dip the AquaChek TruTest Test Strip into your pool or spa. We have new and improved directions available on our website that show the proper timing of actions to ensure you are getting the most accurate results possible from your AquaChek TruTest Digital Test Strip Reader. Also, please be aware that test results can vary from method to method depending on the known levels of accuracy/precision and interference for each kind of test method.
| Q: How long will the batteries last? How long will the unit last? |
A: The AA batteries should last an entire pool season’s worth of testing. The display window will flash “LO” if the batteries are below a certain level of power needed to perform a test. The unit has been developed for the consumer’s pool environment. With good cleaning and storage habits, the meter should last longer than 3 years.
| Q: Why does the unit sometimes not appear to stay “ON”? |
A: The “on” button if depressed quickly on and off can cause conflicts with the software, appearing to not “stay on (or off)”. Simply waiting a minute or so before pressing the ON button should help clear the cycle.
| Q: How should I be cleaning my TruTest? |
A: A simple, non-abrasive wiping of the test strip window and all other surfaces with clean, fresh water should clear any residual chemicals remaining from pool testing.
| Q: What will happen if the meter falls into the pool/spa? |
A: The meter was designed to withstand this kind of accidental submersion and should float upon entry into the water. Simply remove the meter, take out the batteries from the battery compartment, dry the battery compartment thoroughly and replace with dry batteries. The meter should return to full performance.
| Q: Should I “place” or “slide” the test strip onto the test strip window? |
A: It is very important that you do not slide the test strip on the window. This action will result in inaccurate readings. A simple method is to place the first pad nearest the top of the strip onto the window first, then lower the rest of the strip down onto the window. This will ensure that the strip is all the way in and down onto the window.
| Error Messages |
If ER appears in place of a numerical value – the test result is out of range. The parameter is either too high or too low to be accurately analyzed. Note the status level, LO or HI to determine how to treat your water. Re-test after treatment.
If ER2 appears on the screen – there is an error in reading the test strip. Ensrue that you are following the test procedure correctly. Use only AquaChek® TruTest instrumental test strips. No other test strip can be used.
If ER3 appears on the screen – no strip is in place or the test strip is positioned incorrectly. The correct position is with the test pads face down in the slot with the top pad all the way to the top.
Test Strip Use
The AquaChek® TruTest test strips are calibrated to work only with the AquaChek® TruTest test strip reader. Each strip may only be used once. Do not re-dip the strip. Only dip the strip in calm areas of your pool or spa. Ensure you have a fresh supply – keep cap on tight between uses and store at room temperature.