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Summary of Contents for DeltaOHM HD 9212
- Page 1 HD 9212 INSTRUCTIONS MANUAL...
- Page 2 HD 9212 pHMETER THERMOMETER – 15 –...
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Page 3: General Characteristics
ENGLISH GENERAL CHARACTERISTICS The instrument allows measurements of pH, mV or temperature to be ta- ken with a passive 4-wire Pt100 probe of the series TP9... pH measurement It is possible to take pH measurements by connecting a pH electrode to the instrument (Fig. - Page 4 ENGLISH Temperature measurement Temperature measurements may be taken by connecting to the instru- ment a 4-wire Pt100 probe of the series TP9... (Fig. 2). Temperature measurement is possible in the range from -50.0°C to -199.9°C. The resolution of the instrument is 0.1°C. The temperature may be displayed in either Centi-...
- Page 5 ENGLISH Disabling auto power off The auto power off function is disabled during switching on of the instru- ment, by pressing simultaneously, for at least 1 second, the On/Off and °C/°F buttons. When the auto power off function is disabled the battery symbol flashes. Instrument calibration code The instrument can operate with 3 calibration or work codes (calibration codes).
- Page 6 ENGLISH Displaying temperature and changing the measuring unit By pressing the °C/°F button it is possible to display the temperature measured (if a 4-wire Pt100 temperature probe of the series TP9... is connected) or the pH electrode compensation temperature (if a pH elec- trode is connected).
- Page 7 ENGLISH ature with respect to the buffer value. The compensation must be done manually. Before calibrating the electrode, the compensation value of the pH elec- trode must be set in the instrument; this is equal to the temperature value of the buffer solutions used, and is set with a temperature probe or directly with the buttons (see the description in the previous paragraph).
- Page 8 ENGLISH PROCEDURE FOR CALIBRATING THE INSTRUMENT (WORK CODE C02) Selecting the work code for calibrating the instrument 1. Switch on the instrument, holding down the On/Off and CAL buttons simultaneously for at least 1 second. During this phase the auto power off func- Tension simulator tion is automati-...
- Page 9 ENGLISH First voltage calibration point 1. Connect a voltage simulator to the input of the instrument (Fig. 3); simulate a value of 0.0 mV, that is the first calibration point. 2. When the measurement is stable press the CAL button. The symbol indicating mV flashes and the display shows the value 0.0°C.
- Page 10 ENGLISH First temperature calibration point 1. Connect a 4-wire Pt100 simulator to the input of the instrument (Fig. 4); simulate a value of 0.0°C, that is the first calibration point. 2. When the measurement is stable press the CAL button. The symbol indicating °C flashes and the display shows the value 0.0°C.
- Page 11 ENGLISH 4. When CAL is pressed again the instrument quits calibration of the first calibration point. The °C symbol stops flashing and the auto power off function is restored (the battery symbol stops flashing). The instrument shows the CAL message for a few moments. At this point the indication on the instrument coincides with that set on the simulator.
- Page 12 ENGLISH 3. By pressing the buttons it is possible to change the mV value until it coincides with the reference value. 4. When CAL is pressed again the instrument quits calibration of the first calibration point. The mV symbol stops flashing. The instrument shows the CAL message for a few moments.
- Page 13 ENGLISH Second calibration point 1. Insert the probe in a furnace with a temperature corresponding to the second calibration point, for example 197.0°C, or a value less than 199.9°C. 2. When the measurement is stable press the CAL button. The symbol indicating °C flashes and the display shows the value 197.0°C.
- Page 14 ENGLISH Reading and writing error of sets of instrument calibration parameters If errors occur in the reading or writing of the sets of parameters for cali- brating the instrument, the Er1 code is shown alternately with the mea- surement. In this case it is necessary to switch the instrument off and on again, if the signal is repeated, calibration must be repeated.
- Page 15 ENGLISH GUARANTEE CONDITIONS All our appliances have been subjected to strict tests and are guaranteed for 24 months from date of pur- chase. The Company undertakes to repair or replace free of charge any parts which it considers to be inef- ficient within the guarantee period.
- Page 16 IEC1000-4-3 sucseptibility Electromagnetic interference EN55020 class B emission SIT CALIBRATION CENTRE N° 124 DELTA OHM SRL VIA G. MARCONI, 5 - 35030 CASELLE DI SELVAZZANO (PD) - ITALY TEL. 0039-0498977150 r.a. - FAX 0039-049635596 e-mail: deltaohm@tin.it - Web Site: www.deltaohm.com...
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