HI97771-11 is a high quality set of calibration standards that allows users to validate and calibrate the HI97771 portable photometer that has a 0.00 to 5.00 mg/L (ppm) and 0 to 500 mg/L free chlorine range. The HI97771-11 includes one sealed “A” cuvette for zeroing the meter and one “B” cuvette that is used to validate or calibrate. An acceptable reading using the standards with the HI96771 is 1.00 ±0.03 mg/L for the low range and 100 ±3 mg/L chlorine for the ultra high range @ 25℃.
 
Supplied with Certificate of Analysis
Lot number
Expiration date
Standard value @ 25℃
Reference meter NIST traceable
Sealed standards: 0.00 and 1.00 mg/L free chlorine; 0 and 100 mg/L chlorine