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The HI755 and 772 perform the same test, and the 772 simply converts the results into DKH instead of ppm, so they will work with the same reagent refill. Have a great day!
Hanna Checker Instructions for Marine Alkalinity Standards:
- 1. Thoroughly wipe standard cuvette with HI731318 lint free cloth and only handle using top of cuvette. The cuvette wall must be dry and free of smudges.
- 2. At the C. 1 prompt, place A, HI755-11 standard cuvette into the holder of the Checker and press operations button.
- 3. At the C. 2 prompt, place B, HI755-11 standard cuvette into the holder of the Checker and press operations button.
- Acceptable results must be between 90 and 110 ppm at 25°C
Works as advertised By DaveC on 4/1/2017DaveC would recommend this product to a friendUse this to check accuracy of your checker. Mine is several years old and just wanted to verify it was still functioning correctly. As far as calibration, this will tell you your manual correction factor.
Not for calibration By Ramabama on 2/10/2017Ramabama wouldn't recommend this product to a friendPurchased this thinking it was needed in order to keep checker calibrated. Not the case. Only purpose is to confirm unit is in good working order. No way to actually calibrate checker. This can easily be done by occasionally having water tested at my LFS, which I like doing anyway. Regardless four stars because it's my fault not Hanna's for not doing the proper research.
It's within range By icebrg5 on 1/9/2016icebrg5 would recommend this product to a friendTested it twice and came up at 94ppm which is within the range of the
of the instructions.Test says when at 25 Celsius as well which is 77 F and i tested it and my normal house setting is 72 F. Not really sure if that would have made and difference or not but i will retest when summer gets closer and the heat gets turned off and the temp of the house gets closer to 77 F. Also another thing i would like to point out is that i could not close the hanna checker all the way with either test vile inside it.It would not click shut like it normally does. Obviously something is different about the test viles that makes the checker not able to close all the way.Not sure if that affected the results either.
wrong range control for this application. By David on 3/21/2015David wouldn't recommend this product to a friendThe control is 100 when the range we will be testing most often is 125-150. Why wouldnt you make the control in the desired range? Other than that it is easy to use and give at least a little comfort that nothing has changed with your unit.
Great Product - Easy to Use By analyze this on 12/12/2014analyze this would recommend this product to a friendThis calibration is super easy to use and gives me the peace of mind that my Hanna ALK Checker is calibrated. Both containers are pre-filled so all you have to do is insert the clear vile when C1 appears and insert the colored vile when C2 appears. Simple!