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Calibration Standard for HI 726 Checker HC ®
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The HI 764 Checker®HC is extremely simple to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the HI 764 Checker®HC, press the button and read the results. It’s that easy.
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Range 0 - 20 ppm | ESPA method | Resolution 0.1ppm
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Range 0:00 to 2:50 ppm | USEPA Method 330.5 / DPD | Resolution 0.01ppm
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Range 0.00 - 9.99 ppm NH3-N | Nessler Method | 0.01ppm resolution
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Range 0 - 500 PCU | Platinum Cobalt method | Resolution 5 PCU
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Range 0-999 ppb | ASTM Method D1687-92 diphenylcarbonate | Resolution 1 ppb
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The HI 761 uses an adaptation of the USEPA method 330.5. The reaction between the chlorine and DPD reagent causes a pink tint in the sample.
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Range 0:00 to 2:50 ppm | ascorbic acid method | Resolution 0.01ppm