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Page 29 of 49

TTI-22 Iss.04– 11/15

9.

Calibrating and Adjusting TTI-22

TTI-22 uses an internal reference resistor for measuring the electrical resistance of the sensor. The

temperature value is calculated from the resistance measurement via internal formulas. For a precise

temperature calculation a regular calibration/adjustment of TTI-22 and the used sensor is necessary.

Send TTI-22 to Isotech once a year for calibration/adjustment. For further information contact your local

Isotech representative.

If you have the capacities for performing a calibration yourself, see Appendix E.

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Содержание TTI-22

Страница 1: ...0 1704 543830 Fax 44 0 1704 544799 Internet www isotech co uk E mail info isotech co uk The company is always willing to give technical advice and assistance where appropriate Equally because of the...

Страница 2: ...th Pre stored Sensor Parameters 15 6 2 2 Getting Started without Stored Sensor Parameters 16 6 2 3 Switching TTI 22 Off 16 7 CONFIGURING TTI 22 17 7 1 SETTING A PASSWORD 17 7 2 SETTING DATE AND TIME 1...

Страница 3: ...OBLEMS WITH INSTRUMENT ACTIVATION 39 APPENDIX D TEMPERATURE CALCULATION METHODS 40 D 1 DIN IEC 751 INDUSTRIAL PLATINUM RESISTANCE THERMOMETERS AND PLATINUM MEASURING RESISTORS 40 D 2 INTERNATIONAL TEM...

Страница 4: ...UARANTEE INTERFERENCE WITH OR FAILURE TO PROPERLY MAINTAIN THIS INSTRUMENT MAY INVALIDATE THIS GUARANTEE RECOMMENDATION The life of your ISOTECH Instrument will be prolonged if regular maintenance and...

Страница 5: ...operator 2 Safety Instructions Read the instruction manual at hand before using TTI 22 Follow all hints and instructions contained in this instruction manual to ensure the correct use and safe functi...

Страница 6: ...aken based on the results Service and repair procedures may only be carried out by authorized personnel or by Isothermal Technology Ltd 2 1 4 Disposal Concerning the disposal of TTI 22 observe the leg...

Страница 7: ...mbol next to the battery compartment There is a warning sign on the rear of the instrument next to the battery compartment Warning Observe the correct polarity when placing the batteries Only use 1 5...

Страница 8: ...for use as temperature sensors The temperature of standard thermometers is calculated according to ITS 90 International Temperature Scale 1990 Individual calibration parameters for up to 30 different...

Страница 9: ...ck the delivery for completion by comparing the supplied parts to those noted in Table 4 1 3 If a part is missing contact your Isotech representative 4 If a part is damaged contact the transport compa...

Страница 10: ...the menu mode To change to the next higher menu level In an active input field To abort the input The input is cancelled and the prior field content is restored To toggle between menu items or input f...

Страница 11: ...Warning 4 Temperature display or error message 5 Power supply 6 Symbol for measurement mode blinking 7 Sensor input 2 channel 2 Fig 5 2 Example of a display 5 1 2 Instrument Connections on Front Side...

Страница 12: ...ata Pin 3 RXD receive data Pin 4 not assigned Pin 5 GND ground Pin 6 not assigned Pin 7 not assigned Pin 8 not assigned Pin 9 not assigned 5 2 2 Ethernet Terminal The LAN terminal type RJ45 complies w...

Страница 13: ...ge we recommend the use of rechargeable batteries for environment protection The use of backlight RS232 or the network cuts the battery runtime short When using these features use batteries with large...

Страница 14: ...t the manufacturer or supplier of the instrument 6 1 Assembling the Measuring System Warning Only use the delivered power adapter Mat No 43768 Observe the correct polarity when placing the batteries O...

Страница 15: ...h Pre stored Sensor Parameters If sensor parameters have already been entered and assigned to the sensor inputs 1 and 2 ex factory TTI 22 displays the current temperature of the sensors Fig 6 2 Exampl...

Страница 16: ...7 5 2 Assign the sensor parameters to the sensor input 1 CH1 or 2 CH2 see Chapter7 5 TTI 22 displays the current temperature of the sensor Fig 6 4 Display after input and selection of sensor parameter...

Страница 17: ...main menu 7 1 Setting a Password TTI 22 has been assigned no password ex factory We recommend setting a user password as soon as possible The user password restricts the access to the menus Edit Conf...

Страница 18: ...switch to menu 2 Edit Configuration 1 Clock 2 Press the key in order to enter the date and time via the numerical keys 3 To change from day to month to year or to change from hour to minute to second...

Страница 19: ...s and uses it to calculate the temperature via internal formulas standard case quadratic equation These formulas coefficients which are different for each sensor are called sensor parameters or calibr...

Страница 20: ...ibration certificate for differentiation With DIN IEC 751 the parameter R0 is always used whereas with ITS 90 the parameter R 0 01 C is specified For industry sensors e g the sensors described in Appe...

Страница 21: ...nge can cause irreversible change in sensor behaviour and may require a new calibration 10 Enter the calibration parameters R0 R 0 01 C A B C C 1 C 5 according to the calibration certificate by overwr...

Страница 22: ...Edit Configuration 3 Sensors 3 Select Sensor 1 or 4 Select Sensor 2 Information If you select the item NO SENSOR Calibr the first line of the list on position 00 instead of a valid sensor calibration...

Страница 23: ...ed for averaging between 5 and 50 After each change to the number N it takes N x 1 44 seconds until a new statistic is displayed see Fig 7 8 Fig 7 8 Display of resistance statistic The mean value and...

Страница 24: ...calibration parameters If the measuring current during calibration strongly deviates from the measuring current in TTI 22 or the thermal resistance air water still or moving strongly differs this fun...

Страница 25: ...onnection with the wires 2 RXD and 3 TXD crossed Therefore you cannot use the interface cable of these instruments for TTI 22 unless you use an adapter which crosses RXD and TXD We recommend using the...

Страница 26: ...R2 109 00070 Ohm T1 64 6448 C T2 23 1107 C SENSOR1 No 000002 SENSOR2 No 000001 GET RREF RREF Calibration INT RREF 380 009068 CAL TIME DAYS 364 GET SENSOR Sensor Calibrations Sensor 1 N 000002 IEC751 C...

Страница 27: ...C 200 R0 100 0000000 A 0 00390830 B 5 577500E 07 C 4 183000E 12 Sensor 2 N 007845 IEC751 CAL TIME DAYS 100 MAX TEMP C 800 CAL LOW C 50 CAL HIGH C 200 R0 100 0000000 A 0 00390830 B 5 577500E 07 C 4 183...

Страница 28: ...interface LAN of TTI 22 to a local network Caution Be sure to only enter configuration parameters that fit the network you use If necessary contact the network administrator 1 Configure the Ethernet...

Страница 29: ...s calculated from the resistance measurement via internal formulas For a precise temperature calculation a regular calibration adjustment of TTI 22 and the used sensor is necessary Send TTI 22 to Isot...

Страница 30: ...reference resistor parameters and the time and date can no longer be altered Entering Lock password 1 Enter the user password 2 Choose menu 4 LOCK Device 3 Enter a Lock password Now TTI 22 is locked...

Страница 31: ...Main Menu Fig 11 2 Main menu 1 Sel Display Start Display type selection 2 Edit Configuration Instrument parameter setting 3 Change User Passw Entering changing user password 4 LOCK Device Locking or u...

Страница 32: ...of the ratios of sensor resistance to reference resistance in large digits 6 R1 R2 R2 R1 Display of the ratios of the two sensor resistances in large digits 11 3 Edit Configuration Fig 11 4 Menu for...

Страница 33: ...Sensor 2 4 RS232 Config Interface parameters of RS232 5 Ethernet Config Parameters for the LAN interface 6 Units Backlight 1 Units C F K For choosing degrees Celsius C Kelvin K or degrees Fahrenheit F...

Страница 34: ...intyb 0 4 m confidence level 95 Number of measuring values 50 a f s full scales b This value does not include the calibration uncertainty of the used reference resistor A 2 TTI 22 as High precision Th...

Страница 35: ...ax dR after 1 year 10 ppm max dR after 3 years Display Liquid Crystal Display graphic with LED backlight 128 64 points approx 6 5 3 5 cm Keyboard 20 keys Number of sensor inlets channels 2 Sensor conn...

Страница 36: ...Page 36 of 49 TTI 22 Iss 04 11 15 Appendix B Declaration of Conformity...

Страница 37: ...the maximum entered in the calibration data Max Temp is displayed in the line Cal Time Calibrate the sensor again and enter the new calibration parameters NO SENSOR CALIBRATION No sensor parameters we...

Страница 38: ...t statistics display mode Set the correct display mode When choosing a sensor calibration with the command SET SEN1 XX or SET SEN1 XX invalid memory number A value outside the range from 1 to 30 was e...

Страница 39: ...k their charge condition 2 If you operate TTI 22 with a power adapter check whether the power adapter is correctly plugged in 3 If the instrument immediately switches itself off despite functional pow...

Страница 40: ...sic values The relation between electrical resistance and temperature is defined as follows Range 200 C to 0 C Equ 1 Rt R0 1 At Bt2 C t 100 C t3 Range 0 C to 850 C Equ 2 Rt R0 1 At Bt2 Constants Varia...

Страница 41: ...reference thermometer at 0 C 100 C and 160 C With the three measuring points and the equation Rt R0 1 At Bt2 the parameters R0 A and B are determined For calibration plausibility the calibrated plati...

Страница 42: ...oint E freezing point S melting point Temperature range C Calibration points Parameters 5 0 961 78 TH2O ESn EZn EAl EAg a b c d d 0 for T90 660 323 C W 660 C 6 0 660 32 TH2O ESn EZn EAl a b c 7 0 419...

Страница 43: ...rmally nor electrically dissipation loss 100 W So these are practically storage conditions Caution Before the instrument is delivered the value of the internal reference resistor is determined to four...

Страница 44: ...I 22 Standard resistor 100 Ohm or rather 400 Ohm Calibration certificate for the standard resistor certified by a bureau of standards measuring uncertainty 1 ppm Thermostat with oil bath 1 The standar...

Страница 45: ...internal reference resistor and enter it into TTI 22 yourself The following formula is used for the calculation an ext old f new f R R x R R Re Re Equ 3 RRef new calculated value of the internal refe...

Страница 46: ...in Equ 3 gives 9850 399 0185 100 014 100 003 400 Re x R new f After the new value 99 9985 has been entered for RRef the mean value displayed on TTI 22 has to match the actual value of the standard re...

Страница 47: ...into different units use the following conversion equations Conversion of degrees Fahrenheit 32 9 5 15 273 32 9 5 F C t F K T Conversion of Kelvin 15 273 32 15 273 5 9 K T C t K T F Conversion of deg...

Страница 48: ...N A Improved Web Interface LAN XML page available LAN 8 digits serial numbers for sensors 8 digits device serial numbers introduced New PC commands for DIN IEC 751 sensor definitions More decimal plac...

Страница 49: ...Page 49 of 49 TTI 22 Iss 04 11 15 Declaration of Conformity...

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