User manual HANNA INSTRUMENTS HI 2550

[. . . ] Instruction Manual HI 2550 Multiparameter pH/ORP/°C EC/TDS/NaCl Bench Meter w w w. c o m 1 Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using this instrument. This manual will provide you with the necessary information for correct use of this instrument, as well as a precise idea of its versatility. [. . . ] To view the Relative mV calibration data, press GLP when the instrument is in Relative mV measurement mode. The instrument will display the time (hh:mm) of the last calibration. CAL TIME Use the ARROW keys to scroll through the calibration data: · The date (yyyy:mm:dd). · The Relative mV calibration offset. · The instrument ID. 25 EC CALIBRATION DATA EC calibration data is stored automatically after a successful calibration. To view the EC calibration data, press GLP when the instrument is in EC measurement mode. The instrument will display the time (hh:mm) of the last calibration. Use the ARROW key to scroll through the calibration data: · The date (yyyy:mm:dd). · The EC calibration buffer. · The cell constant. · The calibration offset factor. · The reference temperature. · The temperature coefficient. 26 · The temperature compensation mode. · The instrument ID. N aCl CALIBRATION DATA NaCl calibration data is stored automatically after a successful calibration. To view the NaCl calibration data, press GLP when the instrument is in NaCl measurement mode. The instrument will display the time (hh:mm) of the last calibration. Use the ARROW key to scroll through the calibration data: · The date (yyyy:mm:dd). · The salinity coefficient. · The cell constant. · The reference temperature. 27 · The temperature compensation mode. · The instrument ID. Notes: · If no temperature compensation is selected during calibration, the temperature coefficient is not displayed in GLP. · Press GLP at any moment and the instrument will return to measurement mode. · If calibration has not been performed on the selected range, the instrument displays "no CAL" message blinking. CAL LOGGING FUNCTION Up to 700 logged samples can be stored into memory. 200 manually logged records and 500 lot logging records can be stored in the memory. To select logging type enter SETUP menu. LOGGING THE CURRENT DATA (manual logging) Select the manual logging mode in SETUP menu. To store the current reading into memory press LOG while the instrument is in measurement mode. The instrument will display "MAn" on the primary LCD, the record number on the secondary LCD and "LOG" tag for a few seconds (see example below: record No. 15): 28 followed by the number of free records: If there are less than 6 memory locations remaining, the record number and "Lo" message will be displayed to alert the user. If the log space is full (200 records), "FULL LOG" message will be displayed and no more data will be saved. When LOG is pressed, a complete set of information is stored: date, time, pH, mV, EC, TDS, NaCl temperature and calibration data. LOT LOGGING Select "StAb" (stability logging) or the desired time interval. To start interval logging press LOG key while the instrument is in measurement mode. When the selected interval is reached or when the reading is stable (for log on stability), the instrument will display the current lot number on the primary LCD line, the record number on the secondary LCD line and the LOG tag (see example below: Lot 5 record 7) followed by the number of free records on the corresponding memory space. If stability logging is selected, a complete set of data is memorized every time the reading becomes stable after an unstable condition. To stop interval logging press LOG key again. The "LOG" tag will be cleared. Note: When pressing any key that is not active, while lot logging is running, the following message is displayed for a few seconds. 29 VIEW LOGGED DATA Press the ALT&RCL keys while in measurement mode to retrieve the stored information. If no data was logged for the current selected measurement range and no lots are memorized, one of the next messages will be displayed: LOG No pH measurements records: LOG No Relative mV and mV records: LOG mV No EC records: LOG No TDS records: LOG No NaCl records: LOG Otherwise, the instrument will display the lot number on the primary LCD line, the number of records on the secondary, "LOG" tag and "CFM" blinking. If samples were logged on demand "MAn" will be displayed on the primary LCD and the number of samples logged on the secondary (see example below: manual log, 15 samples logged). Press ARROW keys to select different lot. 30 Press CFM to view record information. [. . . ] Use: laboratory, vials. HI 1331B Glass-body, semimicro, single junction, refillable, combination pH electrode. Use: flasks. HI 1230B Plastic-body (PES), double junction, gel-filled, combination pH electrode. Use: general, field. HI 2031B Glass-body, semimicro, conic, refillable, combination pH electrode. Use: semisolid products. HI 1332B Plastic-body (PES), double junction, refillable, combination pH electrode. [. . . ]