User`s Guide Heavy Duty Conductivity / Temperature Model 407303
Contents
1. A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Calibration and Repair Services Extech offers repair and calibration services for the products we sell Extech also provides NIST certification for most products Call the Customer Service Department for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy T Support Hotline 781 890 7440 Tech support Ext 200 Email support extech com Repair Returns Ext 210 Email repair extech com Website www extech com Copyright 2003 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in a2. AX reading press the RECALL button The MAX display icon will appear and the measurement display areas will indicate the highest reading encountered since the RECORD button was pressed Press the RECALL button again to view the MIN reading Press the RECALL button again to view the AVG reading Press the RECORD button to exit and return to normal operation The REC MAX MIN and AVG icons should be off when the meter has exited the MIN MAX AVG Record Recall mode Conductivity Calibration The Conductivity sensor calibration should be performed frequently to maximize meter performance 1 Remove the battery from the battery compartment to Rear View of 407303 gain access to the calibration adjustment potentiometer VR4 refer to the diagram below Keep the battery connected to the black and read wires however 2 Prepare a standard conductivity solution of a value close to the value of the solution to be tested if possible 3 Place the probe into the calibration solution and adjust the VR4 potentiometer in the battery compartment until the meter reads the value of the standard solution Other VR potentiometers are located in the battery Battery compartment but should not be adjusted Compartment E SSES Q EE aa Sensor Care Sensor Storage On sheathed cells replace the sheath when storing For non sheathed versions soak the sensor tip in de ionized water in storage Sensor Cleaning After each use the se
3. Slide the RANGE switch to a lower range Selecting C F units of measure Press the C F button to select the Temperature unit of measure The display will reflect the currently selected unit of measure Temperature Compensation using the FACTOR ADJ and TEMP buttons This meter has a user adjustable temperature compensation feature that accommodates a change in conductivity due to a change in solution temperature The default compensation is 2 and applies to most common standard salt solutions Other solutions have known temperature coefficients and the temperature adjustment allows the user to set it to match the solution To change the coefficient 1 2 3 Set the meter to the 200uS range via the RANGE slide switch Press the TEMP button Press the Factor Adjust button to select the desired compensation factor in increments of 0 1 per degree C The display will show the factor as it is adjusted Once the desired factor is set press the TEMP button 4 Model 407303 Version 18 4 04 Data Hold To freeze the LCD display press the HOLD button The DH display icon will appear on the LCD when the meter is in the Data Hold mode Press HOLD again to return to normal operation the DH icon will switch off MIN MAX AVG Record Recall Mode 1 To begin capturing the Minimum MIN Maximum MAX and Average AVG Conductivity and Temperature values press the RECORD button REC will appear on the LCD 2 To recall the M
4. User s Guide EXTECH INSTRUMENTS Heavy Duty Conductivity Temperature Model 407303 POWER HOLD RECORD RECALL FACTOR ADJ ams TEMP Conductivity Temperature Meter 407303 Introduction Congratulations on your purchase of Extech s Conductivity Temperature Meter This meter offers a dual display for Conductivity and Temperature a Conductivity Cell calibration adjustment temperature compensation and a RS 232 PC Interface This professional meter with proper care will provide years of safe reliable service Specifications Dual function 2000 count LCD with contrast adjust Conductivity in Siemens uS and mS Temperature in C F Sensor Structure Remote Conductivity Sensor 1K Carbon rod type Temperature sensor Precision thermistor 0 to 5 per C over the range of 32 to 140 F 0 to 60 C compensation adjust Power Supply 9V battery Power Consumption Approx 7 8 mA DC Weight 17 oz 482 g including batteries amp probe Main instrument 7 1 x 2 8 x 1 3 180 x 72 x 32 mm Probe 0 87 22 mm diameter Conductivity 38 1d 2 to 19 99 mS 32 to 140 F 0 to 60 C 0 1 F 0 1 C 1 5 F 0 8 C 2 Model 407303 Version 18 4 04 Meter Description 1 ONO Sensor input plug The plug is keyed so that it can only be inserted one way into the sensor jack at top of meter RS 232 PC Interface jack For use with Model 407001 Data acquisition so
5. ftware and interface cable kit LCD Display indicates Conductivity and Temperature unit of measure and other user alert symbols discussed in this manual Push buttons POWER Press to turn the meter ON or OFF HOLD Press to freeze the displayed reading C F Press to select the temperature unit of measure RECORD Press to begin tracking the MIN MAX readings RECALL Press to retrieve the MIN MAX readings FACTOR ADJUST Used with the TEMP button for temperature compensation RANGE Slide switch to manually select the measurement range TEMP Temperature coefficient compensation button Battery compartment rear Remove protective holster to access the compartment LCD contrast adjustment dial Adjust to desired view setting Sensor top Conductivity and Temperature sensor reside in sensor top Rubber protective holster Remove holster to access rear battery compartment RECORD RECALL FACTOR ADJ CO TEMP 3 Model 407303 Version18 4 04 Operation Connecting the Sensor 1 Remove the protective sheath from the sensor tip before use Retain the sheath for sensor storage The sensor connects to the input jack at the top of the meter The sensor jack is keyed thereby allowing the sensor plug to be inserted from only one direction Line up the plug with the jack before firmly inserting the sensor Avoid undue force forcing the sensor into the jack may bend the pins in the sensor p
6. lug Powering the meter 1 Press the POWER button to turn the meter ON or OFF If the meter does not switch on when the POWER button is pressed check the battery Refer to the battery installation and replacement section later in this manual This meter is equipped with an Automatic Power OFF feature To conserve battery energy the meter shuts off after 10 minutes To defeat this feature press the RECORD button to access the Record Recall mode In the Record Recall mode the meter will remain on until the user turns it off or until the battery weakens LCD Contrast Adjustment It may be necessary to adjust the display contrast due to a change in viewing angle or voltage drift Use the LCD Contrast adjustment wheel located on the right side of the meter to set the preferred contrast Taking Measurements and using the RANGE select slide switch 1 2 Insert the sensor tip into the solution under test The conductivity and temperature readings will appear on the LCD Conductivity measurements appear at the center of the LCD Temperature readings appear on the bottom of the LCD in smaller digits Allow time for the measurements to stabilize The LCD display digits will settle after a short stabilization period If dashes appear on the top of the LCD measurement area the reading is over range Slide the RANGE select switch to a higher range If dashes appear on the bottom of the measurement display area the reading is under range
7. nsor tip should be rinsed with de ionized water If solids build up inside the sensor carefully remove them with a cotton swab soaked in solvent However do not touch the metal parts inside the sensor 5 Model 407303 Version18 4 04 RS 232 PC Interface This meter is equipped with an RS 232 PC Interface jack The jack is located at the top of the meter next to the sensor input jack The interface is intended for use with the Model 407001 data acquisition software and hardware kit For more information contact Extech or refer to the 407001 User Manual Battery Replacement The low battery indicator LBT appears on the LCD when the battery runs low To replace the battery 1 Remove the meter s rubber protective cover to access the rear battery compartment 2 Pry open the battery compartment cover using a small coin or screwdriver 3 Replace the 9V battery and attach the compartment cover and protective holster Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website at www extech com click on Contact Extech and go to Service Department to request an RA number
8. ny form 6 Model 407303 Version 18 4 04
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