Instruction Manual HI 504920 Remote User Interface pH Meter w w w . h a n n a i n s t .
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. directives.
through a password protection method. The Battery Error Preventing System (BEPS) detects when the batteries level becomes weak. When the batteries are getting low, a clear indication is displayed on LCD to warn the user of this condition. However, the meter continues to measure correctly even when the low battery indication is displayed. The meter automatically switches itself off when the batteries are too weak to support proper function.
SPECIFICATIONS Range pH mV Temp. Resolution pH mV Temp. pH (@20°C/68°F) mV Accuracy Typical EMC Deviation Temp. pH mV Temp. pH Calibration mV Calibration Temperature Compensation pH Electrode ORP Electrode Input Impedance Infrared optical interface towards HI 504910 Power supply Casing Environment Dimensions Weight -4.00 to 19.99 pH ±600.0 mV ; ±2000 mV autoranging -20 to 120 °C 0.01 pH 0.1 mV between ±400 mV 0.2 mV from +400 to +600 mV 0.2 mV from -400 to -600 mV 1 mV outside 0.
CALIBRATION pH CALIBRATION For greatest accuracy, it is recommended to frequently calibrate the instrument. For a faster procedure, it is possible to calibrate at 1 point, but it is always a good practice to calibrate at 2 points. For a two-point calibration two of the following pH buffers can be used: pH 4.01, pH 7.01 (or 6.86), pH 10.01 (or 9.18). In the case of a two-point calibration in the acidic range (from 0 to 7 pH), use pH 7.01 (or 6.86) buffer as first solution and pH 4.
mV CALIBRATION USE AS REFERENCE pH METER Contact your nearest Hanna Service Center for periodic mV calibration. It is recommended to have the meter recalibrated for mV reading at least every two years. TEMPERATURE CALIBRATION (for technical personnel only) Contact your nearest Hanna Service Center for periodic temperature calibration. It is recommended to have the meter recalibrated for temperature reading at least every two years.
Note: At point 5, if the probe offset is outside the allowed limits, if HI 504910 is configured to measure ORP, or if some other error occurs, the LCD shows a blinking "bAd" message. To cancel this message and return to normal mode, press TXCAL. Then restart the calibration procedure from the beginning.
SETUP MODE Setup can be used to view data regarding instrument status (e.g. battery charge) or to change the meter parameters (e.g. time). • 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. • Select the code of the desired parameter using the or key. • Press CFM to confirm the code.
1 2 The meter automatically checks for entered time/date accuracy as follows: 0≤hh≤23; 0≤mm≤59; 01≤dd≤28/29/30/31; 1≤MM≤12; 1998≤YYYY≤2097. To change the password, the correct code must be entered first. If the password has been forgotten, the password protected features are no longer accessible; in this case contact your nearest Hanna Service Center. Some of the setup parameters are explained below.
ORP MEASUREMENTS GOOD LABORATORY PRACTICE (GLP) Connect the ORP electrode to the meter and press the ON/OFF key. The meter automatically sets the mV range. If the electrode is not connected the LCD will display the "no probe" message and then dashes. To take ORP measurements, remove the electrode protective cap and simply submerge the tip (4 cm/1½") of the electrode in the solution to be tested, stir gently and allow for the reading to stabilize.
• The LCD will then display the last pH calibration date. • Press DISPLAY to scan remaining data, in the following order: last calibration time; electrode offset value in mV ("OFF" appears on the secondary LCD); electrode slope in mV/pH ("SLP" appears on the secondary LCD); first calibration point buffer; second calibration point buffer (only if a 2-point calibration has been performed). If calibration was performed with an old or dead probe, the message "old probe" or "dead probe" will scroll on LCD.
TEMPERATURE-RESISTANCE CORRELATION FOR HANNA pH SENSITIVE GLASS ELECTRODE CONDITIONING AND MAINTENANCE The resistance of glass electrodes partially depends on the temperature. The lower the temperature, the higher the resistance. It takes longer time for the reading to stabilize if the resistance is higher. In addition, the response time will suffer to a greater degree at temperatures below 10°C.
Replace the solution in the protective cap with a few drops of HI 70300 Storage Solution. Follow the Preparation Procedure above before taking measurements. Note: NEVER STORE THE ELECTRODE IN DISTILLED WATER OR DRY. PERIODIC MAINTENANCE Inspect the electrode and the cable. The cable used for connection to the meter must be intact and there must be no points of broken insulation on the cable or cracks on the electrode stem or bulb. Connectors must be perfectly clean and dry.
ORP PRETREATMENT SOLUTIONS HI 7091L HI 7092L Reducing Pretreatment solution, 500 mL bottle Oxidizing Pretreatment solution, 500 mL bottle CE DECLARATION OF CONFORMITY ELECTRODES HI 62920 HI 32920 HI 3619D HI 3620D pH electrode with built-in temperature sensor, matching pin, Titanium-body, DIN connector & 2m (6.6') cable Combination ORP/Pt electrode, Titanium-body with DIN connector & 2m (6.6') cable Combination ORP/Pt electrode, glass-body, single junction, with DIN connector & 1m (3.
SALES AND TECHNICAL SERVICE CONTACTS Australia: Tel. (03) 9769.0666 • Fax (03) 9769.0699 China: Tel. (10) 88570068 • Fax (10) 88570060 Egypt: Tel. & Fax (02) 2758.683 Germany: Tel. (07851) 9129-0 • Fax (07851) 9129-99 Greece: Tel. (210) 823.5192 • Fax (210) 884.0210 Indonesia: Tel. (21) 4584.2941 • Fax (21) 4584.2942 Japan: Tel. (03) 3258.9565 • Fax (03) 3258.9567 Korea: Tel. (02) 2278.5147 • Fax (02) 2264.1729 Malaysia: Tel. (603) 5638.9940 • Fax (603) 5638.9829 Singapore: Tel. 6296.
