User manual HANNA INSTRUMENTS HI 504910

[. . . ] HI 504910 Digital Transmitter Instruction Manual TABLE OF CONTENTS WARRANTY . 52 ELECTRODE CONDITIONING AND MAINTENANCE . 62 Dear Customer, Thank you for choosing a Hanna Product. Please read this instruction manual carefully before using the instrument. [. . . ] Dead pH probe (13) : Offset is outside of ±60 mV or slope outside the range 40 to 70 mV/pH. Try to clean the probe; if the error persists after cleaning, replace the probe immediately. No calibration (14) : The device has lost its calibration due to an EEPROM reset. Temperature probe broken (20) : Check the temperature probe wires and connections. Power reset (90) : The device was restarted due to a power failure. EEPROM corruption (91) : The EEPROM data is damaged. Reset the EEPROM, then recalibrate and reconfigure completely the instrument. Watchdog reset (92) : The device was restarted due to a watchdog reset or a manual reset done through the keyboard. 29 pH/ORP PROBE CHECK The pH electrode and the reference electrode for both pH and ORP can be automatically monitored through HI 504910. Setup items involved are I. 13 (pH electrode impedance test enable), I. 14 (reference electrode impedance test enable) and I. 15 (maximum reference electrode impedance). A "pH electrode broken or leakage error" (error code: 10) is generated whenever the pH electrode impedance is less than 1 M. This error can be due to breakage of the electrode glass or short circuits caused by moisture or dirt. A "reference electrode broken or dirty or not immersed" error (error code: 11) is generated whenever the reference electrode impedance is greater than the value set in item I. 15 (maximum reference electrode impedance range is 0. 5 to 100. 0 K, default is 50. 0 K). This error can be due to soiling of the reference electrode. It can occur also when the reference electrode or the matching pin are not immersed in the solution. The pH electrode test is performed when the following conditions are satisfied: · the test has been enabled through the setup item I. 13; · the device is in one of the following modes: measure, last calibration data scrolling, event log file scrolling; · the device is configured to measure pH. If an amplified electrode is used, the pH electrode test must be disabled by the user through the setup item I. 13. The reference electrode test is performed when the following conditions are satisfied: · the test has been enabled through the setup item I. 14; · the device is in one of the following modes: measure, last calibration data scrolling, event log file scrolling. When testing or calibrating the instrument through a pH/ORP simulator like HI 931001 or HI 8427, temporarily set the item I. 13 to "OFF" and short the Matching pin and the Reference pin terminals. Note Note 30 TEMPERATURE COMPENSATION If the setup item G. 01 is set to "AtC" an automatic temperature compensation will be performed using the temperature value acquired with the Pt100/Pt1000 input. If the probe appears to be unconnected, or anyway it does not give a valid temperature (temperature outside the -30 to 130°C range), the instrument will generate a broken temperature probe error. In this case the temperature will be automatically set to the setup item G. 02 ("Manual or probe error temperature") and the setup item G. 01 will be automatically set to "USEr" (see below). After that, the Pt100/Pt1000 input continues to be monitored to track the Pt100/Pt1000 error closing. The setup item G. 01 is automatically changed back to "AtC" when the Pt100/Pt1000 error is closed. [. . . ] CLEANING PROCEDURE General Soak in Hanna HI 7061 General Cleaning Solution for approximately ½ hour. Removal of films, dirt or deposits on the membrane/junction: Protein Soak in Hanna HI 7073 Protein Cleaning Solution for 15 minutes. Inorganic Soak in Hanna HI 7074 Inorganic Cleaning Solution for 15 minutes. Oil/grease Rinse with Hanna HI 7077 Oil and Fat Cleaning Solution. [. . . ]