3101 Dry-Well - Thermometer Point
Contents
1. oily or wet environments If the case becomes dirty it may be cleaned using a damp cloth and mild detergent Do not allow moisture to enter the case It is important to check for and remove any foreign objects in the dry well holes WARNING Never introduce any fluids or other foreign material into the dry well This will damage the dry well and could cause probes to become lodged It could also cause a potential electric shock In the event that the heat source should require service or repair please contact ETI for assistance There are no user serviceable parts inside and any attempted repair will void any warranty WARRANTY This instrument carries a one year warranty against defects in either components or workmanship During this period products that prove to be defective will at the discretion of ETI be either repaired or replaced without charge The product warranty does not cover damage caused by fair wear and tear abnormal storage conditions incorrect use accidental misuse abuse neglect misapplication or modification Full details of liability are available within ETl s Terms amp Conditions of Sale available by request In line with our policy of continuous development we reserve the right to amend our product specification without prior notice Consequential loss or damage is not covered by this warranty SPECIFICATION temperature range resolution accuracy stability heating times stabilisation cooling times ho2. 3101 Dry Well heat Ccool source calibrator User Manual order code 271 401 CONTENTS Introduction safety parts amp control power lead power switch fan stand dry well temperature controller operation temperature setting probe testing maintenance care of the 3101 Dry Well warranty specitication SO CO ON NN OCOD OO Ba Oa oO A A INTRODUCTION The 3101 dry well heat source allows users to check the accuracy of thermometers and sensors as a system on site without the need for heavy expensive equipment The dry well is a high accuracy portable heat source that is extremely easy to use Simply plug in switch on and set the dry well to the temperature that you wish to check insert your probe into the correct size well and take the reading Compare the temperature reading of your thermometer and probe to the displayed temperature of the dry well and the difference is the error of your instrument For optimum accuracy and UKAS traceability use an ETI Reference Thermometer or similar to make comparison measurements The 3101 dry well is controlled by a closed loop microprocessor based digital PID temperature controller system incorporating a combination heater cooler and a precision platinum RTD sensor housed in the aluminium block Fan cooling allows rapid changes in well temperature upon demand The required temperature may be adjusted in 0 1 C increments across the range of the instrument using the buttons on the fro
3. isplay This indicates when the unit is in heat mode or when the unit is controlling within the proportional control band To show the set point temperature in the display press and release either the up or down arrow button AV Press and hold either the up or down arrow button AV to change the set point value A shift can be entered into the controller by pressing the scroll left hand button Press and hold either the up or down arrow button AV to change the shift value A factory set value will be entered at the time of certification The shift value should only be adjusted if the unit is being monitored by an ETI Reference Thermometer or similar All other functions of the controller have been factory set and locked to maintain accuracy and repeatability 6 OPERATION DRY WELL SET UP Place the dry well unit on a flat level surface with at least 150 mm of space all round The stand may be swung out to lift the front of the unit Plug the power lead into a suitable grounded AC power outlet socket Check for and remove any foreign objects prior to switching on Turn the instrument on using the switch located on the rear panel below the power lead The fan will start immediately and the controller display will illuminate after approximately three seconds TEMPERATURE SETTING The dry well may be set to any temperature between 10 to 110 C in 0 1 C increments see Temperature Controller section for details The control
4. le dimensions inserts well depth power display case dimensions weight 10 to 110 C at 20 C ambient OISE 10 to 99 9 C 0 5 C 100 to 110 C 1 C holes greater than 6 35 mm 2 0 C 20 5 C ambient to 100 C after 10 minutes 5 minutes ambient to 0 C after 10 minutes 2 x 13 mm that will accept various inserts each unit is supplied with two inserts of customer s choice 100 mm 230 volt AC 110 115 volt 50 60 Hz available 200 watt 10 mm LED 89 x 152 x 186 mm 1800 grams hole dimensions given are nominal INSTRUMENT RECORD CARD 3101 Dry Well order code 271 401 Q Serial No Calibrated by Date This instrument has been checked or calibrated against reference instrument s calibrated by a UKAS Accredited Calibration Laboratory at 10 C 0 C and 100 C To BS EN 60584 manufactured by Electronic Temperature Instruments Ltd Easting Close Worthing West Sussex BN14 8HQ tel 01903 202151 fax 01903 202445 e mail sales etiltd com www etiltd com aaa
5. lectronic components and the heatsink It is a 5 2 speed fan and at lower set point temperatures the fan speed will increase shown by indicator 02 on the controller Allow at least 150 mm of space all around the unit and DO NOT obstruct any of the ventilation holes STAND The stand can be folded flat against the under side of the unit when not in use or if the unit is to be operated in a horizontal position it can be swung down and forward until it hits the stops so that the unit can be used in an inclined position The stand was not designed to be a carrying handle and should NOT be forced past the stops for this purpose DRY WELL The aluminium dry well is located on the front panel The dry well is designed to accept two inserts 4 8 and 6 4 mm as standard Other inserts are available to suit standard probe diameters Use the nearest larger size insert to the probe diameter being checked The inserts are a close fit in the dry well to give good thermal conduction Keep the inserts clean and avoid damage by storing carefully The inserts MUST be regularly removed and cleaned to ensure they do not seize in the dry well DO NOT introduce any liquids or substance into the dry well or inserts as this may result in the inserts lodging in the dry well TEMPERATURE CONTROLLER In normal operating mode the numeric LED display shows the actual well temperature A Control Output Indicator light O1 is located in the top left corner of the d
6. nt panel These units are ideal for use in a variety of industrial and process applications Each unit is supplied with a traceable certificate of calibration showing actual test data which can be used as part of quality assurance programmes SAFETY Operate the dry well in an ambient temperature between 10 and 30 C 15 to 25 C for optimum accuracy and humidity between 5 to 95 non condensing The fan runs continuously to moderate the internal unit temperature Always ensure the air vents and fan aperture are clear and have at least 150 mm of space between them and any obstructions NEVER cover the unit while in operation or operate if the fan stops If the equipment is used in a manner not specified by the manufacturer the protection by the equipment may be impaired A The calibrator can operate at very high temperatures Precautions MUST be taken to prevent personal injury or damage to surrounding objects Probes may be hot when removed from the unit and should be placed on a heat resistant surface The unit may remain hot for several 4 minutes after switching off DO NOT switch off at temperatures above 100 C Allow to cool before storage A Care must be taken when removing probes and inserts from the unit If the unit is set at a high temperature the inserts will be very hot and could cause burns to the hands Please use the insert removal tool supplied After removal place hot probes and inserts only on a suitable heat pr
7. oof surface Only place inserts and temperature probes in dry well holes This unit is designed to be operated dry DO NOT introduce any liquid into any of the dry well holes These dry wells are designed to be rugged and durable but contain electronics DO NOT operate in dirty dusty or very damp environments or near liquids that could present a hazard from electric shock Connect input power lead to only a 230 volt 50 60 Hz or 110 115 volt 50 60 Hz model dependant grounded AC power supply The unit requires up to 200 watts of power Mains plug fuse rating is 3 amps The 3101 dry well heat source is programmed and calibrated at the factory for optimum performance and should not need adjusting If the unit is out of calibration or is in need of repair please return to the supplier The dry well is equipped with an internal electrical fuse If a fuse blows return to the supplier for inspection and repair THERE ARE NO USER SERVICEABLE PARTS INSIDE PARTS AND CONTROLS POWER LEAD The power lead is clamped through the rear panel of the unit and is not removable Plug into a standard 230 volt or 110 115 volt model dependant grounded power outlet socket POWER SWITCH The power switch is located on the rear panel of the unit and operation is indicated with a 1 and a 0 DO NOT introduce any liquid into any of the dry well holes FAN The internal fan runs continuously when the unit is operating This provides cooling for the internal e
8. will cause the unit to heat or cool to the set point temperature The dry well temperature is displayed in operation A small overshoot and undershoot will occur when the well reaches the set point temperature 10 minutes is normally required to reach a higher set point temperature It will take longer to reach a lower set point temperature Once the set point temperature is reached a further 10 minutes should be allowed for stability to be achieved For optimum accuracy and stability allow the unit to warm up for 30 minutes after power up The displayed well temperature should stay within 0 5 C of the set point temperature PROBE TESTING Insert the probe to be tested into one of the holes in the dry well The probe should be a snug fit for good heat transfer but should not be so tight that it cannot be removed easily Best results will be obtained when the probe is inserted to the full depth of the dry well hole of closest size to the probe diameter Allow the reading from the probe to stabilise and then compare the reading with either the temperature controller display or an external reference thermometer For optimum comparison accuracy use a high precision ETI Reference Thermometer or similar If probes with a large mass are inserted into the dry well holes the unit will require up to 10 to 15 minutes to re stabilise MAINTENANCE CARE OF THE 3101 DRY WELL The 3101 dry well requires very little maintenance Avoid operation in dusty dirty
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