Presys T-25N Technical Manual Download Page 1 | Manualshive

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Summary of Contents for T-25N

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Page 2: ...ent without removing the plug from the supply WARNING Much electromagnetic noise can cause instability to the equipment The equipment is provided with electromagnetic interference filters that protect not only the mains but also the equipment itself against noise These filters have no function if the unit is not earthed properly WARNING High temperatures are achieved in this equipment Risk of fire...

Page 3: ...ng Mode 12 2 4 Programmable Operating Mode 13 2 5 Automatic Operating Mode 13 3 Recommendations as regards Accuracy of Measurements 15 3 1 Getting a Better Accuracy from the Dry Block 15 3 2 Recommendations to Other types of Insert 16 4 Safety Instructions 17 5 Calibrator Warning Messages 17 6 Calibration 18 6 1 Input Calibration 18 6 2 Probe Calibration 19 7 Instructions for Hardware Maintenance ...

Page 4: ...s temperatures from 25 ºC to 125 ºC 13 ºF to 257 ºF Presents input for thermocouples thermoresistances thermoswitches Besides generating temperature it measures the signal from the sensor being calibrated Allows the control of the dry block temperature by using an external probe optional The temperature calculation uses Callendar Van Dusen coefficients Makes no use of external standard thermometer...

Page 5: ...ric signal calibrator Independent circuitry for over temperature protection and safety Insert to choose carrying case strap and test leads included If the insert is not specified it will be provided the insert type IN01 Cup like insert with 3 4 hole hole does not reach the bottom together with a set of tiny balls made of steel used for fulfillment included 1 1 Technical Specifications Operating Ra...

Page 6: ...2 ºF 0 1 ºC 0 1 ºF 0 1 ºC 0 1 ºF 0 1 ºC 0 1 ºF 0 6 ºC 1 2 ºF 0 4 ºC 0 8 ºF 0 2 ºC 0 4 ºF IEC 60584 IEC 60584 IEC 60584 TC E 270 to 150 ºC 454 to 238 ºF 150 to 1000 ºC 238 to 1832 ºF 0 1 ºC 0 1 ºF 0 1 ºC 0 1 ºF 0 3 ºC 0 6 ºF 0 1 ºC 0 2 ºF IEC 60584 IEC 60584 TC N 260 to 200 ºC 436 to 328 ºF 200 to 20 ºC 328 to 4 ºF 20 to 1300 ºC 4 to 2372 ºF 0 1 ºC 0 1 ºF 0 1 ºC 0 1 ºF 0 1 ºC 0 1 ºF 1 0 ºC 2 0 ºF 0...

Page 7: ...4 06 0001 21 Probe 1 5 DIN 90º bend mini DIN connector 04 06 0007 21 Communication Interface Description Order Code RS 232 9 way D type Connector COM1 06 02 1002 00 RS 232 25 way D type Connector COM2 06 02 1004 00 RS 485 06 02 1006 00 Carrying Case Order Code 06 01 0006 00 ISOPLAN 5 Calibration Software Calibration Certificate ...

Page 8: ...eadings are stored in the calibrator memory When powered on ON OFF key the calibrator goes through a self test routine and shows the last calibration date and the value of the battery voltage The battery voltage is constantly monitored and the low battery warning is provided After the self test is completed the display shows the starting menu IN EXEC CONF CAL COM The initial setpoint is 25 00 ºC B...

Page 9: ...ANUAL If the internal compensation is selected the cold junction temperature value is displayed by the calibrator If the MANUAL option is selected the cold junction must be supplied by the operator After confirming the value by pressing ENTER the calibrator goes back to the operating mode RTD Selects the type of thermoresistance used Choose from PT100 NI100 CU10 and PT1000 types Choose also if the...

Page 10: ...PRESYS Instruments T 25N Page 7 2 1 1 Input Connections Diagrams ...

Page 11: ...sensor into the insert and plug the mini DIN connector to the external probe input EXT PROBE located on the calibrator front panel as illustrated in the figure below The temperature control with the external probe must be enabled by the PRBe option of the PRG menu More details in item 2 2 Menu CONF ...

Page 12: ... the date and time of the calibrator Thus when the calibrator performs a calibration in the automatic mode via ISOPLAN 5 all data are registered together with date and time of occurrence Every time the calibrator is powered off the internal clock does not continue to be updated However the ISOPLAN 5 software can automatically update the calibrator date and time with the computer internal clock Oth...

Page 13: ...INT LOW in case of 10 20 or 25 fixed steps of the range The option VARIABLE allows the user to define from 2 to 11 values of temperature setpoint not necessarily in ascending order To verify the step values of a program select the VARIABLE option and confirm the values shown in the display with the key ENTER The 10 20 and 25 options change the number of steps automatically and recalculate the valu...

Page 14: ...rature transmitter calibration for instance because it displays the current temperature and the transmitter reading mA in the same unit Thus the error can be verified directly in ºC or ºF Select the option SC and press ENTER If no input is selected in IN the calibrator will show the SELECT INPUT FIRST message In this case go to menu IN and select the input signal type The function SC will show IN ...

Page 15: ...CE to cancel 2 3 Manual Operating Mode The display shows the selected temperature value of the block and also the current block temperature or thermo element temperature value There are 4 ways in which the information are shown covering the calibrator input value IN the block temperature PRBi or PRBe measured with the internal or external probe respectively and the temperature setpoint SET The key...

Page 16: ... approximately 0 05 ºC At this time the buzzer beeps in case it is configured to YES 2 5 Automatic Operating Mode The thermo element calibration is performed in an automatic way by the T 25N calibrator The configuration as well as the calibration verification is carried out by the calibrator itself Also it is possible to use the ISOPLAN 5 software and its work orders like a CAC Computer Aided Cali...

Page 17: ...the number of points that have succeeded Following press ENTER to verify each one of the readings performed by the calibrator The keys and interchange 2 screens one that displays the block and thermo element temperature value and the other displays a message indicating the calibration point number and its state OK or FAIL besides the error value in The option TAG from menu COM can present a list o...

Page 18: ...use of the insert below 0 C increase the setpoint to a positive temperature value withdraw the insert from the block and the sensor dry completely all these parts before continuing the calibration This procedure guarantees an accuracy next to 0 1 C In case you can accept higher values of accuracy like 0 2 C or more these cares can be left apart 3 1 Getting a Better Accuracy from the Dry Block The ...

Page 19: ...ther than the one used to adjust the dry block for example the cup like insert fulfilled with tiny steel balls the accuracy from the manual is no longer valid since the thermal contact is different in relation to that insert However another control sensor adjustment can be performed to the new insert Do that using an external probe with high accuracy placed in the new insert and follow the steps d...

Page 20: ...ait until they reach the ambient temperature so that the heterogeneous cooling of the parts do not jam each other 5 Calibrator Warning Messages Warning Meaning Procedure RAM ERROR READ MANUAL Problem in RAM memory Turn the calibrator off and on If the error persists send the instrument to the factory EEPROM ERROR READ MANUAL Problem in EEPROM memory Same as the previous item LOW BATTERY Level of b...

Page 21: ...ed and once it has been filled in it will be displayed every time the calibrator is turned on Options for IN calibration are mV mA OHM CJC PROBE 6 1 Input Calibration Select the corresponding mnemonic and apply the signals presented in the tables below When calibrating inputs the display shows on the 2 nd line the value measured by the calibrator and on the 1 st line the same value is expressed as...

Page 22: ...re sensor internal Probe RESTORE Restores the internal temperature sensor calibration parameters to the factory values To readjust the internal Probe it is necessary to compare the value indicated by the calibrator Probe and the temperature value from an external probe placed in the dry block insert The temperature of the external probe should have high accuracy and should be measured by a superth...

Page 23: ...he T 25N temperature calibrator that can be repaired by the user Only the 6Amp fuse placed within the socket on the rear can be replaced by the user The fuse may blow due to a voltage spike in the mains or a calibrator component fault Replace the fuse once If a second fuse blows again it is because the fault is not that simple Send the calibrator to the factory for repair 8 Instructions for Fittin...

Page 24: ...actory using an insert with an appropriate well that fits the standard sensor snugly Thus the accuracy specifications presented in this manual are not valid any more Anyway consider an increase of up to five times the accuracy values To use the tiny balls and continue achieving accurate measurements it is necessary to read from an external reference sensor tied together with the sensor to be calib...

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