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Summary of Contents for jenway 3505
- Page 1 Model 3505 pH/mV/Temperature Meter Operating Manual 350 550/REV A/03-03...
- Page 2 SAFETY Please read this information carefully prior to installing or using this equipment. 1. The unit described in this manual is designed to be operated only by trained personnel. Any adjust- ments, maintenance and repair must be carried out as defined in this manual, by a person qualified to be aware of the hazards involved.
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Page 3: Table Of Contents
Model 3505 pH/mV/Temperature Meter Operating Manual Contents Section 1 Introduction Instrument Description Instrument Specifications Section 2 Installation Unpacking Installation Displays/Controls Inputs/Outputs Section 3 Operation Theory of pH Measurement pH Measurement Preparation of Buffer Solution Solution Temperature Values Good Practice Guidelines... -
Page 4: Introduction
Compensation can be achieved by use of the ATC probe, which will enable the user to perform temperature measurements within the range of 0 to 100°C. The Model 3505 has a liquid crystal display and is battery operated. The use of an optional power supply permits the unit to be operated from the a.c. mains supply. -
Page 5: Installation
Any shortages or damage should be reported immediately to the Manufacturer or your local Distributor. 2.2 Installation The Model 3505 is supplied ready to use. Connect the ATC (if required) and the pH electrode to the rear panel Temp and pH sockets. The electrode stand requires minimal assembly (refer to the diagram below). -
Page 6: Displays/Controls
2.3 Displays/Controls Fig. 2.3.1 - Displays/Controls 1. Display Provides direct readout of pH, millivolts, temperature of samples and standards and low battery indication. 2. Function Used for selection of mode of operation. Switch Off - power off. pH - pH measurement based on last calibration (the adjustment controls have no function). -
Page 7: Inputs/Outputs
2.4 Inputs/Outputs Fig. 2.4.1 - Rear Panel Layout 1. Ref Socket 2mm pin socket. Connection socket for a separate reference electrode. When performing measurements with some pH and Ion Selective electrodes a separate reference electrode is needed. 2. pH Socket BNC type socket which allows combination pH or redox electrodes to be used. -
Page 8: Operation
If the liquid junction is inefficient then measurement will be inaccurate. It is common for the reference electrode to be incorporated into the pH electrode. It is then called a combination electrode. The Model 3505 is supplied with a combination electrode. 350 550/REV A/03-03... -
Page 9: Preparation Of Buffer Solution
The voltage developed by each individual pH electrode in the presence of a known hydrogen ion concentration is theoretically predictable, but in practise deviations from the theoretical value can be expected. These deviations will change slowly during the life of an electrode. It is therefore essential to routinely calibrate the system using solutions with a known and constant pH value. -
Page 10: Good Practice Guidelines
3.5 Good Practice Guidelines The types of electrodes available are many and various. For the majority of tests carried out on aqueous solutions, with a reasonable ionic strength; at ambient temperatures and with limited use in strongly acidic or alkaline solutions, the standard glass or epoxy bodied combination electrode is ideal. -
Page 11: Ph Calibration Using Buffers
3.6 pH Calibration Using Buffers When performing calibrations two buffer solutions are required, a pH7 and either a pH4 or 10, dependent on the type of measurement being performed, i.e; acidic (pH4) or alkaline (pH10). Buffer solutions should be carefully prepared as per the Manufacturers instructions. Calibration - with Manual Temperature Compensation Select °C on the Function switch. -
Page 12: Performing Measurements
Select pH on the Function switch. When this position is selected the calibration settings are locked (no further adjustment can be made to the buffer and slope values until the pH Cal position is re-selected on the Function switch). Immerse the electrode(s) and ATC probe in the unknown solution. The display will indicate the pH value of the solution. -
Page 13: Maintenance
Maintenance 4.1 General The Model 3505 is designed to give optimum performance with minimum maintenance. It is only necessary to keep the external surfaces clean and free from dust. To give added protection when not in use the unit should be switched off and covered with the optional dust cover (060 406). -
Page 14: Optional Accessories
Section 5 Optional Accessories 5.1 Optional Accessories The following list of items are available as optional accessories for use with the Model 3505: 021 030 Power Supply (UK Version) 021 031 Power Supply (European Version) 021 032 Power Supply (US Version) -
Page 15: Troubleshooting
4) Set the meter to pH cal and adjust Buffer control to read 7.00. If this cannot be set to 7.00 please contact the manufacturer or you local distributor. To make measurements from this point refit the ATC probe and pH probe and calibrate the 3505 using fresh buffer solutions (see section 3.6). - Page 16 Temperature input check. Remove the temperature probe and apply a 10Kohm resistor across the pins of the temp input as described in fig 7.2.1 Fig 6.2.1 Temperature input with connection detail 350 550/REV A/03-03...
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Page 17: Ec Declaration Of Conformity
EC Declaration of Conformity Jenway Model 3505 pH/mV/Temperature Meter complies with the following European Standards: EN 50081-1:1992 Electromagnetic compatibility - Generic emission standard EN 50082-1:1992 Electromagnetic compatibility - Generic immunity standard (Performance criterion EN 61010-1:1993 Safety requirements for electrical equipment for measurement, control and laboratory... - Page 18 Thank you for reading this data sheet. For pricing or for further information, please contact us at our UK Office, using the details below. UK Office Keison Products, P.O. Box 2124, Chelmsford, Essex, CM1 3UP, England. Tel: +44 (0)330 088 0560 Fax: +44 (0)1245 808399 Email: sales@keison.co.uk...