| Calibration Check pH-meters. The pH measured by a dirty electrode changes over a period of time. HI221 compare the characteristics of the ph electrode from one calibration to the next. In case of large variances in electrode condition, this meter alert the user that the electrode needs to be properly cleaned. GLP in addition to storing calibration data, the instruments can be programmed to give an alarm when a new calibration is required. Access protected with a password RS232 interface. Supplied with a pH-electrode HI1131P, a temperature probe HI7669/2W, a electrode holder and a 12V cadapter |
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