GOMETRICS T264 User Manual

Ph calibrator

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Gometrics S.L.

Pol. Ind. Riera de Caldes, C/ Basters 17

Palau-solità i Plegamans - 08184 Barcelona

Tel Main Office (+34) 93 8646843

Tel Central Zone (+34) 91 3710042

Web: http://www.gometrics.net

E-mail: info@gometrics.net

T264

pH Calibrator

USER'S MANUAL

Reference: MI-T264-13-EN

Release: 1.3

Review:

July 2023

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Page 1 Calibrator © Copyright 2021 Gometrics S.L. Pol. Ind. Riera de Caldes, C/ Basters 17 Palau-solità i Plegamans - 08184 Barcelona Reference: MI-T264-13-EN Tel Main Office (+34) 93 8646843 Release: 1.3 Tel Central Zone (+34) 91 3710042 Web: http://www.gometrics.net Review: July 2023 E-mail: info@gometrics.net...
Page 2 A reasonable effort has been taken with respect to the accuracy of the information in this manual. Gometrics shall not be held responsible for any typographical errors or for the information contained in this manual.
Page 3: Table Of Contents
CONTENTS Contents Page Contents ..................3 Introduction ................... 4 Applications ................4 Examples ................. 4 Safety ..................5 Instrument reception ..............6 Description ................... 7 Display..................8 Keypad ..................8 Terminals ................. 10 Power supply system ............... 10 Putting into operation ..............
Page 4: Introduction
APPLICATIONS The T264 calibrator is a piece of equipment that has been especially designed for use with any type of instrument that employs electrodes for pH measurement.
Page 5: Safety
With loop control it is possible to verify regulator equipment, such as valve operation. SAFETY The T264 is a precision instrument and should only be used by personnel with adequate training. The use of electric magnitudes involves a series of risks that should also be contemplated and studied with respect to the area of work.
Page 6: Instrument Reception
INSTRUMENT RECEPTION Gometrics takes special care so that every newly supplied calibrator is in perfect conditions, free from all defects and complete with all accessories. The standard instrument is delivered in individual packaging with the following contents:  T264 Calibrator.
Page 7: Description
DESCRIPTION The T264 is a compact unit with reduced dimensions that enables it to be operated with just one hand. They include rechargeable batteries for portable operation, so that they can be used to make readings in the field. The foot incorporated at the rear of...
Page 8: Display
DISPLAY The T264 employs a 4½ digit LCD system. The display includes indications of the selected simulation mode or when the battery level is low. accordance with display capabilities, numeric and alphabetic characters are displayed. KEYPAD This is manufactured from Lexan®, which is highly resistant to aggressive substances ensuring a long lifetime.
Page 9 With a short press the equipment is switched on. Having the equipment on, the display will light up with a short press. Hold for 2 seconds to turn off the T264. [IN/OUT] Switches from simulation to measurement mode and vice versa.
Page 10: Terminals
If already connected, when the charger switch on, the charging indication will also displayed. All batteries have a limited lifetime. These can be replaced in the T264 by the user, as described in the maintenance section (page 19).
Page 11: Putting Into Operation
PUTTING INTO OPERATION The T264 is switched by pressing the power button , provided that the battery has the appropriate level of charge or the instrument is connected to its charger. During the switch-on sequence the screen will display the following four stages: - Display test: In this mode all the display segments are turned on.
Page 12: Application
The T264 can also be employed as a direct millivolt generator / meter. One aspect to be taken into account when working with electrodes is that the generated millivolts correspond to the difference between two solutions that are joined by a porous membrane.
Page 13 The T264 is a high precision instrument and the voltage signal readings are performed at high resolution, as is the associated mathematical processing. The analytic world has to contend with very high error margins, because although it is known that the instruments employed are of...
Page 14: Ph Simulation / Mv Generation
pH SIMULATION / mV GENERATION When the instrument is switched, the default mode is pH simulation. pH / mV generation display selection Initially the equipment is in pH simulation mode. This mode can be verified by observing that the decimal point of the reading flashes. Pressing the [pH/mV] key will switch to mV generation mode.
Page 15 Once the calibrator has been correctly configured, it can be connected to the instrument to be calibrated. The T264 includes an impedance test that is intended to verify the suitability of an input for electrode measurement. To measure the voltage produced by the electrodes a high impedance input is required.
Page 16: Pre-Selection Keys
Pre-selection keys The T264 has six value pre-selection keys, [S1] to [s6]. The pH and mV generation modes have independent pre-selection points. Changing values assigned to the pre-selection keys If the values assigned to each key are to be modified, the following...
Page 17: Ph / Mv Measurement
In measurement mode, the messages that can be displayed are the same as the once previously described for the battery, together with "Err.h" when the pH value exceeds T264 measurement capabilities and "Err.l" for lower values. The section on technical specifications lists these acceptable limits.
Page 18: Maintenance
MAINTENANCE The T264 is a high quality instruments that does not require any especially complicated care. Rational use and conservation will ensure long instrument lifetimes. BATTERIES All, power accumulators have limited lifetimes, but correct maintenance will lengthen life and maintain performance.
Page 19: Battery Replacement
3. Replace it with a new one paying attention to respect the polarity. 4. Place the plastic cover and fasten it with the screws. Only GOMETRICS EH6LF22H250 rechargeable battery should be used. The use of any other battery could damage the instrument.
Page 20: Adjustments
If suitable standards are not available for calibration and adjustment, it should be sent to an accredited laboratory in order to obtain a correct level of certification and traceability. The T264 is adjusted with voltage units, which means there is no need for any analysis equipment. temperature...
Page 21: Mv Generation Adjustment
Select the value "8888" using the [▲] and [▼] keys. Then press the [AUTO] key again. The screen will display the "F.CaL" message. The T264 has a generation scale with a range of approximately -1000 to +1000 mV. In order to adjust the instrument, a standard must be connected to the equipment's generating terminals in mV measurement mode with a scale that is suitable for measuring ±900 mV.
Page 22: Mv Measurement Adjustment
"CL:0.9" message. The T264 can still be adjusted when only a single 900 mV reference is available by simply inverting the connecting cable polarity.
Page 23: Temperature Adjustment
TEMPERATURE ADJUSTMENT Insert a 4 mm standard probe in the common terminal of the instrument and stabilize it for about 1h. Observe the instrument’s error in reference to the standard and deduct it. (Instrument - Standard = Error). In the generation mode, the adjustment is accessed by pressing and key until the “CodE”...
Page 24: Technical Specifications
TECHNICAL SPECIFICATIONS SIMULATION / GENERATION Generation range: 0,00 to 14,00 pH. -1000 to 1000 mV. Resolution: 0,01 pH / 0,1 mV. Accuracy at 23 ± 3 ºC: ± 0,025% F.S. Uncertainty at one year: ± 0,05% F.S. Maximum output current: 3 mA.
Page 25: Power Supply
LCD 10 mm, 4½ digit, 7 segments Maximum indication: -19999 to 19999 MICROPROCESSOR The T264 incorporates a microprocessor 16 bits with 32 Kbytes of memory to control all instrument functions. 16-bit A/D converter. Non-volatile EEPROM which holds the configuration and adjustment data.
Page 26: Appendix
APPENDIX mV calculation formula in function of pH and temperature: mV = - (pH-7) * (Temp ºC+273,15) * 0,19842 mV = - (pH - 7) * (Temp ºF * 1,8 + 305,15) * 0,19842 ºC ºC ºC mV at 20ºC mV at 25ºC 0 -54,20 17 -57,57 34 -60,94 407,17...
Page 27 NOTES...
Page 28 Change control register: DATE REVIEW COMENTS 01/07/2021 v1.0 First version. 19/07/2021 v1.1 Content review and update. Added change control register. 06/08/2021 v1.2 Content update for the new version of the T264. 31/07/2023 v1.3 Improved equipment functions and updated content.