User manual HANNA INSTRUMENTS HI 504920

[. . . ] Instruction Manual HI 504920 Remote User Interface pH Meter www. hannainst. com This Instrument is in Compliance with the CE Directives Dear Customer, Thank you for choosing a Hanna Instruments Product. Please read this instruction manual carefully before using the instrument. This manual will provide you with all the necessary information for correct use of the instrument. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com. [. . . ] After step 4 the primary LCD will show the blinking "CALt" message and the secondary one a countdown starting from 120 seconds. In this situation, the pH probe can be taken out of the solution and the interface cable must be connected to the HI 504910 before the countdown reaches zero. At step 6 the pH tag of the secondary LCD does not blink, because the corresponding pH reading is the one taken with the HI 504920 pH probe immersed when TXCAL was pressed. If the interface cable is not connected before the end of the countdown, the LCD shows the "tiMEout" message and the calibration procedure is aborted. Note: To perform a two-point calibration procedure with standard pH buffers (pH 4. 01, 6. 86, 7. 01, 9. 18, 10. 01) through the HI 504910 terminal mode, see the "Setup mode section", code 90. Note: A probe life verification (as described in the "GLP" section) is performed on the HI 504910 pH probe; the message "old probe" or "dead probe" could appear at the end of calibration. 12 HI 504910 pH READING CHECK The check of the HI 504910 pH reading against the HI 504920 pH reading is possible at any time. Perform the following steps: · Connect the infrared optical interface cable to HI 504910. · The primary LCD shows the HI 504910 pH reading and the secondary one displays the HI 504920 pH reading. Note: In case of a communication error between HI 504920 and HI 504910, the LCD shows the "rSEr" message. Note: If the LCD shows ". . . ", verify that HI 504910 is configured to measure pH and not ORP. 13 SETUP MODE Setup can be used to view data regarding instrument status (e. g. · To enter this mode press (ALT+) SETUP while the meter is in measurement mode. · The setup code "00" will blink on the secondary LCD and "SEt" will be displayed on the primary one. Note: If (ALT+) SETUP are pressed before code confirmation, the meter returns to measurement mode. · If the selected parameter is password protected, the lower LCD will display "PAS" and the password must be entered to proceed. Otherwise, the current parameter value will be displayed. PASSWORD PROTECTION Setting of time, date and calibration alarm time-out are password protected and the user will be asked to enter the password to change these parameters. · If password is set to 0000 (factory setting), just press CFM to confirm. · If password is set to a value different from 0000, enter the password with the up and down arrow keys and then press CFM to confirm. · If the password is not correct, the meter displays the "WRONG" indication and asks for the password again. · If the password is correct, the meter provides access to the parameter. 14 PARAMETER SETTINGS · Once the parameter code (and password if needed) has been entered, the current value of the selected parameter will be displayed on the primary LCD and the parameter code on the secondary one. · Enter the new value using the arrow keys. · If there is another part of the parameter to be set (e. g. minutes for the time), press DISPLAY to gain access and then enter the new value using the arrow keys. · Press CFM to confirm the value. · If the entered value is not acceptable, the "WRONG" indication will be displayed for a few seconds and then the meter will ask for a correct value. [. . . ] For refillable electrodes: If the fill solution (electrolyte) is less than 1 cm (½") below the fill hole, add HI 7082 3, 5M KCl Electrolyte Solution for double junction or HI 7071 3, 5M KCl+AgCl Electrolyte Solution for single junction electrodes. For a faster response unscrew the fill hole screw during measurements. For AmpHel electrodes: If the electrode does not respond to pH changes, the battery is run down and the electrode should be replaced. MEASUREMENT Rinse the electrode tip with distilled water. Immerse the tip (4cm /1½") in the sample and stir gently for approximately 30 seconds. [. . . ]