Model 4510 Conductivity/TDS Meter Operating Manual 451 050/REV A/03-03
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 adjustments, maintenance and repair must be carried out as defined in this manual, by a person qualified to be aware of the hazards involved. 2. It is essential that both operating and service personnel employ a safe system of work, in addition to the detailed instructions specified in this manual. 3.
Model 4510 Conductivity/TDS Meter Operating Manual Contents Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 k Introduction Instrument Description Instrument Specification 1.1 1.2 Installation Unpacking Installation Displays Controls Inputs/Outputs 2.1 2.2 2.3 2.4 2.5 Operation Good Practice Guidelines Instrument Set up Preparation of Standards Calibration: With Known Cell Constant With Standard Solution Sample Measurement 3.1 3.2 3.3 3.4 3.5 3.6 Maintenance General 4.
Section 1 Introduction 1.1 Instrument Description A general purpose Conductivity/TDS/temperature bench meter for use in laboratory situations. The instrument includes a 32 reading memory facility. Features include: automatic range selection, calibration on standard solutions or direct cell constant entry, automatic temperature compensation, analogue output and RS232 serial interface. 1.2 Instrument Specifications Conductivity Ranges Resolution Accuracy TDS Ranges 0 to 19.99µS / 0 to 199.
Section 2 Installation 2.1 Unpacking Remove the Model 4510 from the packaging and ensure the following items are included: 1. 2. 3. 4. 5. 6.
2.3 Displays 1. Standard selection – indicates which type of standard is being used. Also indicates when a calibration is being performed. 2. Symbol – displayed during set-up of instrument parameters. 3. Primary display – 4½ digit. Provides direct readout in Conductivity or TDS of samples and standards. 4. Mode annunciators – shows selected measurement mode; Conductivity (µS or mS) and TDS (mg/l or g/l). 5. Endpoint symbol 6. Secondary display – 6 digit display.
2.4 Keypad 1. ESC used to switch the instrument on and to place into standby mode (only if power supply lead remains connected to the instrument). Also used to escape/exit a mode. 2. CAL / CLR used to select and perform a calibration sequence. This key is also used to clear readings from Memory. 3. Print key used to initiate a print. 4. Up Arrow used for adjustment during set up, to scroll results and to toggle between Conductivity (µS or mS) and TDS (mg/l or g/l) modes. 5.
2.5 Inputs/Outputs 2.5.1 Rear panel layout 1. Conductivity Socket 7 pin DIN socket which allows the conductivity cell to be connected. 2. Analog Out 2 x 4mm sockets. Analogue output (buffered electrode potential). 3. Output Socket 9 way socket for RS232 connection. 4. Power In AC 9V I/P socket. 2.1 x 5.5mm socket allowing the power supply to be connected to the instrument.
Section 3 Operation 3.1 Good Practice Guidelines 1. For greatest accuracy ensure no particulate matter is suspended in the solution under test. If necessary, filter or allow the particles to settle prior to use. Do not allow the cell to come into contact with any sediment which may be present. 2. Ensure no air bubbles are trapped in the cell area between the plates. 3. Ensure the cell plates are completely immersed in the solution under test. 4.
3.2 Instrument Set-Up The following section details the set-up modes available to the user. These are: Cell constant, Coefficient, Reference Temperature, TDS EC Ratio, Temperature units and Baud Rate. These can be set in sequence as detailed in this section or, by entering the SET UP mode and using the STO key to select a specific parameter at any time. To exit the set up menus at any time press the ESC key. This will return the instrument to the MODE menu.
3.2.2 Temperature Coefficient set up The display will show: The secondary display will show COEFF and will then scroll TEMPERATURE COEFFICIENT after 10 seconds. Symbol will flash while adjustment is being made. The first digit of the displayed value will be flashing. Adjustment of the flashing digit can be made using the Up/Down arrow keys. The Left/Right arrow keys are used to select the next adjusting digit which will flash when selected.
3.2.4 TDS EC Ratio The display will show: The secondary display will show TDS EC and will then scroll TDS EC RATIO after 10 seconds. Symbol will flash while adjustment is being made. The first digit of the displayed value will be flashing. Adjustment of the flashing digit can be made using the Up/Down arrow keys. The Left/Right arrow keys are used to select the next adjusting digit which will flash when selected. Once the full reading has been adjusted to the required value, press the STO key.
3.2.6 Baud Rate For full details relating to serial protocol refer to Section 6 of this manual. The display will show: The secondary display will show BAUD and will then scroll SERIAL PORT BAUD RATE after 10 seconds. Select the required baud rate (9600 or 1200) using the Up/Down keys which toggle between the values. The data bits and parity will automatically adjust as the baud rate is selected. The Left/Right arrow keys and the CAL/CLR key have no function during this set up.
3.3 Preparation of Conductivity Standards Suitable conductivity standards are available commercially or these can be made up as required from analytical grade reagents with reference to relevant physical tables. Method for general purpose Conductivity Standard Accurately weigh out 0.746 grammes of dried A.R. grade Potassium Chloride (KCl) and dissolve in 1 litre of good quality water. This produces a 0.01N solution with a conductivity of 1413µS at 25°C.
3.6 Sample Measurement General Conductivity is a temperature dependent measurement. All substances have a conductivity coefficient which varies from 1% per °C to 3% per °C for most commonly occurring substances. The automatic temperature compensation on the 4510 defaults to 1.91% per °C, this being adequate for most routine determinations. Conductivity readings varying with temperature may be due to the substances under test having a coefficient other than the typical value of 1.91% per °C.
3.7 Results storage and display To store the current displayed result press the STO key. The instrument display will momentarily show STORED on the secondary display. The memory location will be given on the status display. Up to 32 results can be stored. Each result will be stored in the next available memory location.
Section 4 Maintenance 4.1 General The Model 4510 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 the unit is not in use the unit should be disconnected from the mains supply and covered with the optional dust cover (060 406). For longer term storage or re-shipment it is recommended that the unit be returned to the original packing case.
Section 6 Interfacing 6.1 Analogue All units are provided with 2 x 4mm sockets, marked as ANALOG OUT, on the rear panel. An analogue output voltage of 1mV per least significant displayed digit is available from these sockets. 6.2 RS232 The Bi-directional RS232 interface is available on the rear panel 9 way D type connector.
Interfacing (continued) The RS232 communications parameters on the computer or printer need to be set to match those of the Model 4510, as detailed below: 1200 Baud 7 Data Bits Odd Parity 1 Stop Bit 9600 Baud 8 data bits No parity 1 stop bit OR Setting of these options is detailed in Section 3.6.6. The Model 4510 supports both hardware (CTS/RTS) flow control and software XON/XOFF flow control. Pressing the PRINT key outputs from the RS232 interface.
6.4 Printing A 32 column serial printer (037 701) is available for use with the Model 4510. Connect the printer via the cable supplied with the printer to the 9 way socket located on the rear panel of the instrument. To intiate a print out of data press the print key.
6.4.
Section 7 Troubleshooting 7.1Troubleshooting Fault Possible Cause Action No display Check power supply Check that correct 9V ac power supply is connected and switched on. Erratic display Check power supply Unit must be used with supplied 9V acpower supply. Usage of other units will cause the 4510 not to operate. Unstable display Conductivity cell defective Replace conductivity cell.
EC Declaration of Conformity JENWAY Model 4510 Conductivity/TDS 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 B) EN 61010-1:2001 Safety requirements for electrical equipment for measurement, control and laboratory use Following the provision of: EMC Directive - 89/336/EEC and Low Voltage Directive - 73/23/EEC Martyn J.
