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8500994 TT234-0600 User`s Manual

1. I T7234 Configuration Software a File Help Communication Setup UO Config Test Thermistor Config Table Calibration CALIBRATION Input Input Cal Instructions Output Output Cal Instructions Full 5 FACTORY SETTINGS Restore Factory Calibration Restore to Factory Default CALIBRATION STATUS No Error x a TT234 Configuration Software I xX Eile Help Communication Setup I O Config Test Thermistor Config Table Calibration CALIBRATION Input Input Cal Instructions Fasc Output L l TT234 Config Z Connect a presicion resistance of 100 00 ohms to the transmitter input Click OK to submit calibration or Cancel to stop calibration OK Cancel CALIBRATION STATUS No Error Acromag Inc Tel 248 295 0880 Thermistor Potentiometer Rheostat Transmitter w USB Submit Thermistor Configuration Table Once you have made the changes to the Thermistor Config Table click the Send Table to Unit button to write them to the transmitter The Thermistor Config Table page will be disabled during the transfer You can read the status of the transfer in the Status field Alternately you could click File in the upper left hand corner to save the configuration settings to a file on your PC for later reference Once you ve configured the transmitter you are ready to install it in the field as the transmitter has already been factory calibrated If you later encounter error that
2. USB A B Cable Order 4001 112 e USB A B Cable 4001 112 This is a 1 meter USB A B replacement cable for connection between a PC and the USB isolator It is normally included with the TTC SIP Software Interface Package and also with the isolator model USB ISOLATOR USB A mini B Cable Order 4001 113 e USB A mini B Cable 4001 113 This is a 1 meter USB A miniB replacement cable for connection between the USB isolator and the transmitter It is normally included in the TTC SIP Note that software for all TT Series models is available free of charge online at www acromag com Acromag Inc Tel 248 295 0880 26 http www acromag com Model TT234 0600 SPECIFICATIONS Model Number Model TT234 0600 e Signal Transmitter e Isolated Thermistor Rheostat and Potentiometer Input e Two Wire Powered e CE Approved e Includes UL cUL Class 1 Division 2 approvals Custom calibration to customer specifications can be added as a separate line item at time of purchase Input Thermistor Potentiometer Rheostat Transmitter w USB TT Thin Transmitter Model 234 NTC Thermistor Potentiometer Rheostat 2 Series m i i i i Reserved 4 Power 6 2 Wire Loop Powered Approvals 0 UL cUL Class 1 Division 2 Approvals Pending Additional Approvals 0 No other approvals Optional factory calibration to customer specifications is ordered as a separat
3. 4 for Potentiometer input types Once you input the zero precisely or connect the input pins click the OK button of the prompt to calibrate zero scale CAUTION Input Calibration Driving inputs outside of the nominal input range of the transmitter will not be acceptable for calibration of zero or full scale Since input levels cannot be validated during calibration incorrect signal levels will produce an undesired output response 20 http www acromag com Model TT234 0600 Calibration Optional 17234 Configuration Software File Help Communication Setup 1 0 Config Test Thermistor Config Table Calibration CALIBRATION Input Input Cal Instructions Zero Scale Full Scale Output Calibration For Zero Scale endpoint adjustment use a current meter or digital volt meter to accurately measure the transmitter output signal and enter the measurement into the input field below Click the Submit Measurement button to calibrate the transmitter Tip To measure current you can alternatively connect voltmeter across a precision load resistor and then accurately read the output current as a function of the IR voltage drop produced in the resistor recommended for current outputs Currently calibrating 4 20mA Output Zero Scale Zero Scale Measurement mA Cancel Calibration Factory Settings Calibration Status Acromag Inc Tel 248 295 0880
4. Suitable for installation in a Pollution Degree 2 environment with an Installation Category Over voltage Category Il rating per IEC 1010 1 1990 Shock amp Vibration Immunity Module rated to 5g Random Vibration 5 500Hz in 3 axis at 2 hours axis per IEC60068 2 64 Mechanical Shock to 50g 3ms with 3 half sine shock pulses in each direction along 3 axis 18 shocks and 30g 11ms with 3 half sine shock pulses in each direction along 3 axis 18 shocks per IEC60068 2 27 Electromagnetic Compatibility EMC Minimum Immunity per BS EN 61000 6 1 Electrostatic Discharge Immunity ESD per IEC 61000 4 2 Radiated Field Immunity RFI per IEC 61000 4 3 Electrical Fast Transient Immunity EFT per IEC 61000 4 4 Surge Immunity per IEC 61000 4 5 Conducted RF Immunity CRFI per IEC 61000 4 6 Class B Product with Emissions per BS EN 61000 6 3 1 Enclosure Port per CISPR 16 2 Low Voltage AC Mains Port per CISPR 14 16 3 DC Power Port per CISPR 16 4 Telecom Network Port per CISPR 22 VR WN Acromag Inc Tel 248 295 0880 32 http www acromag com Model TT234 0600 Agency Approvals Reliability Prediction Configuration Controls Thermistor Potentiometer Rheostat Transmitter w USB Safety Approvals UL Listed USA amp Canada Hazardous Locations Class Division 2 Groups A B C D Consult Factory Electromagnetic Compatibility EMC CE marked per EMC Directive 2004 108 EC Consult factory MTBF
5. Thermistor Potentiometer Rheostat Transmitter w USB Calibration Output Before attempting to recalibrate the output channel make sure you write your selections to the transmitter by clicking the Send I O Config button Click the Output Cal Instructions button to begin output calibration and enable the Output Zero Scale and Full Scale buttons For output zero scale endpoint adjustment click the Zero Scale button to open the zero scale configuration popup Use a current meter or digital volt meter to accurately measure the transmitter output signal and enter the measurement in the input field provided Click the Submit Measurement button to send the calibration to the transmitter For output full scale endpoint adjustment click the Full Scale button to open the full scale configuration popup Use a current meter or digital volt meter to accurately measure the transmitter output signal and enter the measurement in the input field provided Click the Submit Measurement button to send the calibration to the transmitter If your output acts erratic or appears imprecise you may need to repeat input or output calibration being very careful to take accurate measurements and input correct signal levels If you are measuring a voltage across a load resistance make sure that you use the exact resistance when calculating the load current being measured Also when rescaling to a smaller sub range make sure that you have a
6. model includes two extra terminal connections at TB4 marked C which Connections provide a convenient wiring point for a sourcing wiring variation as shown below Internally these two terminals are connected in common with each other and do not connect to the internal circuit Use of these terminals in the wiring scheme allows external power to be connected local to the transmitter and form a sourcing output entity from this sinking output as shown LOCAL 24VDC MODEL TT2XX 0600 OPTIONAL POWER SUPPLY i OUTPUT POWER WIRING OPTIONAL SOURCING OUTPUT CONNECTIONS avec WITH POWER LOCAL TO TRANSMITTER i i TOP VIEW INPUT SIDE OUTPUT SIDE OUTPUT SIDE C jonm SoS TB1 TB3 Z4 RECEIVERLOAD INPUT OUTPUT T pe 6 LOOP a ey 2P im gl ace ae Y TWISTEDPAIR As ANY MODEL TT2XX 0600 7 8 R Loap INPUT COMMON 8 wan L_ O c OPTIONAL COMMON CONNECTIONS WITH LOCAL EXTERNAL 3 WIRE POWER A FORM A SOURCING OUTPUT RELATIVE TO THE REMOTE SINKING LOAD E iia a a A Sm Earth Ground Connections The transmitter housing is plastic and does not require an earth ground connection except where the optional input cable shield is terminated on the transmitt
7. not temperature and no special linearization will be performed Select the Input Filtering You may select the level of digital filtering to apply to the input channel as None Low Medium or High The respective I O response times are indicated in parenthesis next to the filter selection Note that higher filter levels results in lower average noise but with slower I O response times Select the Break Direction Upon sensor burnout or a broken sensor lead you can select Under range to send the output to its under range limit or Over range to send the output to the over range limit Note that outputs can be reverse acting but in the case under range and over range remain normal Under range and over range limits are 5 outside the nominal output range selected NOTE Potentiometer input types do not support break direction 16 http www acromag com Model TT234 0600 Configuration z m TT234 Configuration Software ame File Help Communication Setup I O Config Test Thermistor Config Table Calibration CONFIGURE I O Get I O Config Input Options Input Type Potentiometer Slidewire 1002 to 100KQ Zi Input Fitering Medium 140 miliseconds 2 Output Options Break Direction Under range Temperature Units Celsius Fahrenheit Kelvin YO Scaling 0 00 4m Out 100 00 20m Out Status No Error Send I O Config TEST I O start Poting Percent Click Start Pol
8. 0 39130 0 65240 0 102900 0 359600 0 21870 0 28582 0 28146 0 29130 0 48560 0 78910 0 271200 0 16430 0 21371 0 21044 0 21890 0 36490 0 61020 0 206200 0 12460 0 16120 0 15873 0 16600 0 27670 0 47540 0 158000 0 9534 0 12261 0 12073 0 12700 0 21170 0 37310 0 122100 0 7355 0 9399 0 9256 0 9796 0 16330 0 29490 0 94980 0 5719 0 7263 0 7153 0 7618 0 12700 0 23460 0 74440 0 4482 0 5658 0 5572 0 5971 0 9951 0 18790 0 58750 0 3539 0 4441 0 4373 0 4714 0 7857 0 15130 0 46670 0 2814 0 3511 0 3457 0 3748 0 6247 0 12260 0 37300 0 2252 0 2795 0 2752 0 3000 0 5000 0 10000 0 30000 0 1815 0 2240 0 2205 0 2417 0 4029 0 8194 0 24270 0 1471 0 1806 0 1778 0 1959 0 3266 0 6752 0 19740 0 1200 0 1465 0 1443 0 1597 2 2663 0 5592 0 16150 0 983 8 1195 0 1177 0 1310 0 2184 0 4655 0 13280 0 811 3 980 0 965 0 1081 0 1801 0 3893 0 10970 0 672 5 809 0 796 0 895 8 1493 0 3270 0 9109 0 560 3 671 0 660 0 746 3 1243 9 2760 0 7599 0 468 8 559 0 551 0 624 7 1041 0 2339 0 6367 0 394 1 469 0 462 0 525 4 875 7 1990 0 5359 0 332 9 395 0 389 0 443 9 740 0 1700 0 4529 0 282 5 334 0 329 0 376 7 628 1 1458 0 3843 0 240 8 283 0 279 0 321 1 535 4 1255 0 3273 0 206 1 241 8 238 1 274 9 458 2 1084 0 2799 0 177 1 207 1 203 9 236 3 393 7 939 3 2402 0 152 8 178 0 175 3 203 8 339 6 816 8 2069 0 132 2 153 6 151 3 176 4 294 0 712 6 1788 0 115 0 133 1 131 0 153 2 255 4 623 5 1550 0 100 2 115 7 113 9 133 6 228 7 547 3 1348 0 87 7 100 9 99 4 116 8 194 7 481 8 1176 0 77 0 88 3 87 0 102 5 170 8 425 3 1029 0 6
9. 2 35 00 179 2000 ep3 30 00 135 2000 R25 10K p25 a5 3694 x BP4 25 00 102 9000 Table Options BP5 20 00 78 9100 all Number of BP 29 BP6 15 00 61 0200 x BP 10 00 47 5400 k Temperature Units BPS 5 00 37 3100 E Celsius BP9 0 00 29 4900 Fahrenheit BP 10 5 00 23 4600 Kelvin BP 11 10 00 18 7900 BP 12 15 00 15 1300 Resistance Multiplier BP 13 20 00 12 2600 oi Bi BP 14 25 00 10 0000 x1000 KOhms BP 15 30 00 8 1940 BP 16 35 00 6 7520 _ Validation Check BP 17 40 00 5 5920 BP 18 45 00 4 6550 l Display Graph BP 19 50 00 3 8930 a BP 20 55 00 3 2700 ERAM co 00 Sai SendTabletount Status No Device Connected Table Preset 1 2000 gt OKO b25 85 3694 5 2000 Template 40 150 410 1 9000 Template 40 150 45 9100 Template 0 150 A10 2 Template 0 150 45 0200 R25 2252Q B25 85 3978 R25 2795Q B25 85 4076 5400 R25 27520 B25 85 4074 R25 3kKQ B25 85 3976 3100 SKQ B25 85 39 bia R25 30KQ B25 85 3943 4600 Custom User Table ann Use Steinhart Hart Coeff F Steinhart Hart Coefficients Steinhart Hart coefficient A Steinhart Hart coefficient B Steinhart Hart coefficient C Submit Coefficients Enter the Steinhart Hart coefficients specific to your thermistor in the input Fields below The Thermistor Resistance Temperature table will be automatically updated based on the Steinhart Hart coe
10. 7 8 77 5 76 4 90 2 150 3 376 4 903 0 59 8 68 3 67 3 79 6 132 6 334 0 794 6 53 0 60 3 59 4 70 4 117 4 297 2 701 2 47 0 53 4 52 6 62 5 104 2 265 1 620 3 41 9 47 5 46 7 55 6 92 7 237 0 550 2 Beta 8 is an indication of the slope of the curve which represents the relationship between the resistance and the temperature of a particular thermistor measured under zero power conditions The higher the Beta value the greater the change in resistance per degree C Beta can be calculated as follows T T2 l RT1 _ _ 298 15 358 15 2252 0 Br T E n P25 85 35815 29815 240 8 3978 73 Rr2 NOTE T and T must be converted to degrees Kelvin K before using in the formula above Acromag Inc Tel 248 295 0880 22 http www acromag com Model TT234 0600 BLOCK DIAGRAM TT234 0600 SIMPLIFIED SCHEMATIC FILTERING AND DETAIL OMITTED FOR CLARITY POTENTIOMETER OR THERMISTOR RHEOSTAT INPUT 1 25V 30ppm RHEOSTAT THERMISTOR POTENTIOMETER 1 25V lt 4 0 3V 3 35mA How It Works Key Points of Operation Acromag Inc Tel 248 295 0880 Loop Powered Input is Isolated from Output Input circuit is common to USB ground USB powers a portion of the input circuit when connected but not the output Thermistor
11. Acromag THE LEADER IN INDUSTRIAL I O USB Programmable DIN Rail Mount Thin Transmitter Model TT234 0600 Two Wire Transmitter NTC Thermistor Potentiometer Rheostat Input 4 20mA Output USER S MANUAL Dor j oF lan IN f fr F f a ACROMAG INCORPORATED Tel 248 295 0880 30765 South Wixom Road Fax 248 624 9234 Wixom MI 48393 7037 U S A email sales acromag com Copyright 2014 Acromag Inc Printed in the USA Data and specifications are subject to change without notice 8500 994E Model TT234 0600 Thermistor Potentiometer Rheostat Transmitter w USB Table of Contents GETTING STARTED DESCRIPTION sscaviccvscavecavevevdvansnesunevevawteavesavevedswansnesevevuvesanavscavesewesaavevenexs 4 KY FOALUM OS 5 cin cis cas svesscesscdusswacecsscensedbscnvsecascadectasssawestos sseuesoussenesosessnesoveiewctedesswesesessnvescwssee 4 AD PU CARON spiscisssnecevacisunceieusutenidnsencvexteneutessandsndslotentdaavsenmendetentdssasdsucuaphenidsuenedweutedendeauenduinius 4 Mechanical DIMENSIONS sissacsscccwsssseciuicntentucunssisnusudestctsdseacsbeuciaisteseisssanbiasseduseassiinienisnsisedenreen 5 DIN Rall Mounting amp Removal iscsisciscstaccvsecasccveccnsvenaceasscnssusbucnscwnsncussunwvenscwabsesievswuendesanveutessi 5 ELECTRICAL CONNECTIONS sesesssssssscsssssscsssssscsssssscssesesossssssossssssossssesoee 6 Sensor Input Connections ssssessssssosssesssessssssssosssosssossecossesseessssessssssssssssossso
12. CV RCV INPUT COMMON lt gt Z SOURCING INPUT RECEIVER SINKING INPUT RECEIVER The 24V DC Excitation is The 24V DC Excitation is Provided Provided by the Card by a Separate Power Supply LA G q F ezn WARNING For compliance to applicable safety and performance standards the use of twisted pair output wiring is recommended Failure to adhere to sound wiring and grounding practices as instructed may compromise safety performance and possibly damage the transmitter TIP Ripple amp Noise Power supply ripple at 60Hz 120Hz is normally reduced at the load by the transmitter but additional filtering at the load can reduce this ripple further For large 60Hz supply ripple connect an external 1uF or larger capacitor directly across the load to reduce excessive ripple For sensitive applications with high speed acquisition at the load high frequency noise may be reduced significantly by placing a 0 1uF capacitor directly across the load as close to the load as possible TIP Inductive Loads If the two wire current loop includes a highly inductive load such as an I P current to pressure transducer this may reduce output stability In this case place a 0 1uF capacitor directly across the inductive load and this will typically cure the problem Acromag Inc Tel 248 295 0880 9 http www acromag com Model TT234 0600 Output Power Thermistor Potentiometer Rheostat Transmitter w USB This
13. HEOSTAT IN ORDER TO CALCULATE THE SENSOR RESISTANCE SENSOR LEAD WIRE RESISTANCE WILL CONTRIBUTE A POSITIVE SHIFT TO THE SENSOR Acromag Inc Tel 248 295 0880 7 MEASUREMENT http www acromag com Model TT234 0600 Thermistor Potentiometer Rheostat Transmitter w USB Output Power Connect a DC power supply and load in series in the two wire loop as shown in the Connections drawing below This transmitter has an ANSI ISA Type II output in which the TBI INPUT TB2 INPUT transmitter s power and output signal share the same two leads and the transmitter output has a floating connection with respect to earth ground applied at the loop supply minus terminal e Output connections are not polarized The output and designation are for reference only with current normally input to Output and returned via Output current sinking e Loop supply voltage should be from 12 32VDC with the minimum voltage level adjusted to supply over range current to the load plus 11V MIN across the transmitter plus any transmission line drop e Variations in power supply voltage between the minimum required and a maximum of 32VDC across transmitter has negligible effect on transmitter accuracy e Variation in load resistance has negligible effect on output accuracy as long as the loop supply voltage is set accordingly e Note the traditional placement of earth ground in the current loop The transmitter outp
14. ISTOR RESISTANCE TEMPERATURE TABLE Resistance KQ Read Table from Unit 239 8000 179 2000 Temperature C BP 1 40 00 BP2 35 00 BP3 30 00 135 2000 BP 4 25 00 102 9000 BP5 20 00 BP6 15 00 BP 10 00 BPS 5 00 BPO 0 00 BP 10 5 00 BP 11 10 00 BP 12 15 00 15 1300 BP 13 20 00 12 2600 BP 14 25 00 10 0000 BP 15 30 00 8 1940 BP 16 35 00 6 7520 BP 17 40 00 5 5920 BP 18 45 00 4 6550 BP 19 50 00 3 8930 BP 20 55 00 3 2700 BP 21 60 00 2 7600 a Table Preset R25 10K2 B25 85 3694 v Table Options 78 9100 61 0200 47 5400 37 3100 29 4900 23 4600 18 7900 Number of BP 29 Temperature Units Celsius Fahrenheit Kelvin Resistance Multiplier x1 Ohms x1000 KOhms Validation Check Display Graph Send Table to Unit 17234 Configuration Software File Help Communication Setup 1 0 Config Test Thermistor Config Table Calibration CALIBRATION Input Input Cal Instructions Output Output Cal Instructions FACTORY SETTINGS Restore Factory Calibration Restore to Factory Default CALIBRATION STATUS No Error HELP You can press F1 for Help on a selected or highlighted field or control You can also click the button in the upper right hand corner of the window and click to point to a field or control to get a Help message pertaining to the item you pointed t
15. MMON w ga NPD MODEL TT234 0600 ii 4 3 E Max u E astececnnenss OE OPTIONAL SHIELD e 4 GROUND F SEE NOTE 2 z u o Ts 2 Z a NOTE 1 DO NOT GROUND THE INPUT SENSOR IF UNIT IS CONNECTED TO A NY GROUNDED PC WITHOUT A USB ISOLATOR NOTE 2 SHIELDED CABLE IS RECOMMENDED FOR BEST RESULTS _ GROUND THE CABLE SHIELD AT THE END OF THE CABLE CLOSEST TO THE BOTON DIN RAIE SERING CEIR GREATEST POTENTIAL SOURCE OF DISTURBANCE USUALLY THE SENSOR END INPUT SIDE INPUT SENSOR INFORMATION NESEN POTENTIOMETER A 3 WIRE VARIABLE RESISTOR USED TO FORM A VOLTAGE DIVIDER VOLTAGE IS MEASURED RATIOMETRICALLY AT WIPER LEAD WITH RESPECT TO INPUT EXCITATION AND GROUND Soe VARIATIONS DUE TO SENSOR LEAD WIRE RESISTANCE AND CHANGE IN ale RESISTANCE OVER TEMPERATURE ARE NULLIFIED BY USING A RATIOMETRIC MEASUREMENT TECHNIQUE aa ed INPUT lt k THERMISTOR A 2 WIRE SENSOR THAT VARIES RESISTANCE WITH SENSED kK x eo TEMPERATURE INPUT RESISTANCE FORMS A VOLTAGE DIVIDER WHICH lt Oe OFTIONAL S IS USED TO CALCULATE THE SENSED TEMPERATURE BY COMPARING k E j SEENOTE3 THE MEASURED RESISTANCE WITH KNOWN THERMISTOR s 2 nc ie CHARACTERISTICS SENSOR LEAD WIRE RESISTANCE WILL CONTRIBUTE Wi OPTIONAL EARTH INPUT A NEGATIVE SHIFT TO THE SENSOR MEASUREMENT z ty SEENOTE 1 ne RHEOSTAT A 2 WIRE VARIABLE RESISTOR USED TO FORM A VOLTAGE u Fa DIVIDER VOLTAGE IS MEASURED WITH RESPECT TO KNOWN INPUT IMPEDANCE TOTAL RESISTANCE OF R
16. Mean Time Between Failure MTBF in hours using MIL HDBK 217F FN2 Per MIL HDBK 217 Ground Benign Controlled GGe MTBF Hours MTBF Years Failure Rate FIT 915 550 613 166 Software Configuration Only via USB This transmitter drives an analog output current proportional to a sensor input No switches or potentiometers are used to make adjustments to this transmitter Its behavior as an isolated signal amplifier transducer is determined via programmed variables set using a temporary USB connection to a host computer or laptop running a Windows compatible configuration software program specific to the transmitter model This software provides the framework for digital control of all configuration and calibration parameters and this information is stored in non volatile memory Refer to Operation Step By Step in the Technical Reference section of this manual for detailed information on available software control of this transmitter Acromag Inc Tel 248 295 0880 33 http www acromag com Model TT234 0600 REVISION HISTORY Thermistor Potentiometer Rheostat Transmitter w USB The following table details the revision history for this document Release Date Version 11 OCT 2013 EGR DOC JMO KLK Description of Revision Initial Acromag release 23 OCT 2013 JMO KLK Added Steinhart Hart Table Preset 12 NOV 2013 JMO KLK Added MTBF Reliability Prediction 16 DEC 2013 JEB ARP Removed P
17. O Box from address 21 FEB 2014 Acromag Inc Tel 248 295 0880 CAP ARP JMO ARP e Added cULus Mark to this model removed pending e Updated Input Specifications 34 http www acromag com
18. Potentiometer Rheostat Transmitter w USB ISOLATED OUTPUT TB3 TWO WIRE OUTPUT 2 a S LOOP L 12 36vDC lt gt 4a MICROCONTROLLER EARTH 1 GROUND ragi RLoap LOOP POLARITY PROTECTION c 2 C CONNECTIONS ARE USED TB4 FOR OPTIONAL SOURCED Z TRI STATE BUFFERS THERE ARE NO INTERNAL CONNECTIONS TO C TERMINALS WIRING CONNECTIONS gi 1 25V 31 6K 0 3V 5V H m H H ISOLATED OUTPUT gt The TT234 transmitter uses a 32 bit microcontroller and a high resolution 24 bit ADC to digitize the input signal and communicate to the output DAC via a serial digital pulse stream The digital communication stream is isolated via a pulse transformer and is received by the 16 bit output DAC which drives a 4 20mA process current Power for the isolated input side of the circuit is provided via an isolated flyback converter that operates in parallel with the output loop Setup involves selecting the input type selecting a filter level and scaling the input range endpoints to 4mA and 20mA at the output Output scaling can also be done in reverse to produce a reverse acting output signal The maximum over range output signal is approximately 24mA the under range signal is 3 5mA Refer to the block diagram above to gain a better understanding of how this transmitter works The input USB output power circuits are isolated from each other The USB por
19. Response Time Input Response Time See output response time Input Linearization NTC Thermistor Inputs Only Uses Thermistor Config Table Configured using software Input Impedance Thermistor Rheostat 200M0 typical Potentiometer 15 4MQ typical Acromag Inc Tel 248 295 0880 27 http www acromag com Model TT234 0600 Thermistor Potentiometer Rheostat Transmitter w USB Input Analog to Digital Converter ADC Input utilizes a 24 bit A ADC converter with only the first 16 bits used see Input Resolution below Input Resolution amp Accuracy The ADC of this model divides the input signal range into a number of parts that can be calculated using the expression for ADC counts as 32768 Rin 10000 Rin with Rin Input Resistance in Ohms for Thermistor Rheostat input types Potentiometer input types have a fixed input resolution of 32768 due toa ratiometric measurement technique An indication of nominal input resolution is expressed as the number of parts between the input range low and high endpoints Table 1 Input Measurement Accuracy Per Input Type Input Type Input Range Typical Accuracy 0 to 100 Potentiometer ee PA r tea 0 1 of Span 1000 to 100KQ 1000 to 500KQ 0 75 of Input Resistance NTC Thermistor 22520 40 C to 100 C 0 1 C 0 18 F 0 1 C 40 18 F NTC Thermistor 30KQ 0 5 C 0 90 F 0 5 of Input Resistance Notes Table 1 1 Thermistor Rheostat Accurac
20. SB Output Power In most installations the loop power supply will be local to either the transmitter or local to the remote receiver Common receiver devices include the input channel Connections of a Programmable Logic Controller PLC a Distributed Control System DCS or a panel meter Some receivers already provide excitation for the transmitter loop and these are referred to as sourcing inputs Other receivers that do not provide the excitation are referred to as sinking inputs and these will require that a separate power supply connect within the loop These types of receivers are depicted below MODEL TT2XX 0600 OUTPUT POWER WIRING SINKING OUTPUT CONNECTIONS WITH COMMON TWO WIRE TRANSMITTER CONNECTION TO SOURCING AND SINKING INPUT RECEIVERS POWER LOCAL TO THE RECEIVER Two Wire Output Connections to the Input Card of a Distributed Control System or Programmable Logic Controller TOP VIEW INPUT SIDE OUTPUT SIDE OUTPUT SIDE 24VDC POWER SUPPLY 1 DCS PLC SOURCING 24VDC Se INPUT CARD zm TB1 TB3 HEH i P 24VDC INPUT OUTPUT sjeta 6 LOOP TWISTED PAIR DCS PLC SINKING gt 5 LOOP 1 Jecceccce OR cocco INPUT CARD SS T int ANY MODEL TT2XX 0600 7 8 TB2 TB4 c c R
21. aling Zero Scale and Full Scale points are chosen too close together performance will be degraded Submit I O Configurations Once you have made your configuration selections click the Send 1 O Config button to write them to the transmitter You can read the status of your sent message in the Status field Alternately you could click File in the upper left hand corner to save the configuration settings to a file on your PC for later reference At this point you can test the transmitter s operation by clicking on the Start Polling button of the TEST I O Section of the page to trigger the software to periodically read the input and display its value in the field to the right of the polling toggle button Note the simulated lamp next to the button flashes each time the input is sampled Click Stop Polling to stop polling the input Thermistor Config Table Thermistor Input Types Only If the transmitter will be interfacing with a thermistor the Thermistor Config Table needs to be updated and or verified Proceed to the next section for instructions on this process 17 http www acromag com Model TT234 0600 Configuration File Help Communication Setup 1 0 Config Test Thermistor Config Table Calibration THERMISTOR RESISTANCE TEMPERATURE TABLE Temperature C Resistance KO l Read Table from Unit BP 1 40 00 239 8000 Table Preset BP
22. ansmitter includes a USB socket for temporary connection to a PC or laptop for the purpose of setup and reconfiguration USB isolation is required when connected to a grounded input sensor see IMPORTANT note on the left During reconfiguration and calibration the transmitter receives power from both the USB port and the output loop Both power sources must be present to calibrate the transmitter CAUTION Do not attempt to connect USB in a hazardous environment Transmitter should be configured and calibrated in a safe environment only Data Rate USB v1 1 full speed only at 12Mbps Up to 32K commands per second USB 2 0 compatible Transient Protection Transient voltage suppression on USB power and data lines Inrush Current Limiting Includes series inrush current limiting at USB power USB Connector 5 pin Mini USB B type socket Hirose Electric UX60 MB 5S8 m po OS Differential Data Note Most Host Personal Computers except battery powered laptops will connect earth ground to the USB shield and signal ground Cable Length Connection Distance 5 0 meters maximum Driver No special drivers required Uses the built in USB Human Interface Device HID drivers of the Windows Operating System Windows XP or later versions only http www acromag com Model TT234 0600 Enclosure amp Physical Environmental Thermistor Potentiometer Rheostat Transmitter w USB General purpose plastic enclosure for mounting
23. d inhibit setup and calibration and may even damage the transmitter This is why an isolated USB connection is recommended The use of an isolator can be avoided if a battery powered laptop PC is used to connect to the transmitter and the laptop has no other earth ground connection either directly or via a connected peripheral 11 http www acromag com Model TT234 0600 CONFIGURATION SOFTWARE Quick Overview Click Open to connect to the TT234 0600 and the software will look similar to the following 77234 Configuration Software ea File Help Communication Setup 1 0 ConfigiTest Thermistor Config Table Calibration DEVICE SELECT Device 17234 0600 0000001 a Model 1T234 0600 Serial Number 0000001 Manufacturer Acromag Ine Status Device opened successfully Reset Device L J z gt l TT234 Configuration Software SS File Help Communication Setup 1 0 Config Test Thermistor Config Table Calibration CONFIGURE 1 0 Get 1 0 Config Input Options Input Type Potentiometer Slidewire 1002to 100k2 Input Fitering Medium 140 miliseconds z Output Options Break Direction Under rang Temperature Units Celsius 1O Scaling 0 00 4mA Out 100 00 20mA Out Status No Error Send 10 Config TEST YO start rating Percent Click Start Polling to poll the input and display its value The LED next to the button will flash when polling is active Click S
24. del 4001 113 USB Cable 1 ea Model 4001 112 USB Cable 1 ea Model USB ISOLATOR MODEL NO USB ISOLATOR REQUIRED 1 ea Configuration Software CDROM 5040 944 WARNING The intent of mating USB with this transmitter is so that it can be conveniently configured and calibrated in a safe area then installed in the field which may be in a hazardous area Do not attempt to connect a PC or laptop to this transmitter while installed in a hazardous area as USB energy levels could ignite explosive gases or particles in the air Acromag Inc Tel 248 295 0880 e USB Signal Isolation is Required See Below Acromag model USB ISOLATOR may be used to isolate the USB port or optionally another USB signal isolator that supports USB Full Speed operation 12Mbps e Configuration Requires USB and Loop Power This transmitter draws power from both the current loop and from USB during setup IMPORTANT USB logic signals to the transmitter are referenced to the potential of the transmitter s input ground This ground is held in common with USB ground and USB cable shield ground The potential of the transmitter s current output pin output minus relative to earth ground will vary according to the load current and load resistance net IR drop Without isolation this IR drop would drive a potential difference between the normally grounded current loop and the grounded USB connection at the PC causing a ground loop that woul
25. dequate input span Input spans that are too small will have diminished resolution and will magnify error The Restore Factory Calibration button resets transmitter and causes it to revert to its factory calibration without effecting user configuration Useful if there was an error during recalibration that degraded performance or the I O channel appears erratic The Restore Factory Default button restores a transmitter to its original factory state See Specifications Reference Test Conditions This includes calibration and configuration This control can be used as a sanitation tool to restore the transmitter to its initial configuration This field displays calibration status messages such as No Error No Device Connected Calibration Error Transfer Error and Timeout Error during calibration If you encounter an error you may have to repeat the calibration process 21 http www acromag com Model TT234 0600 Thermistor Potentiometer Rheostat Transmitter w USB Thermistor Resistance versus Temperature Temperature in Ohms R25 22520 R25 27950 R25 27520 R25 30000 R25 50000 R25 10KQ R25 30KQ Bases 3978 B25 s5 4076 B25 s5 4074 Bosyas 3976 Bsyas 3920 B25 85 3694 B25 85 3943 75790 0 100865 0 99326 0 101000 0 168300 0 239800 0 884600 0 54660 0 72437 0 71332 0 72810 0 121400 0 179200 0 649300 0 39860 0 52594 0 51791 0 53100 0 88530 0 135200 0 481000 0 29380 0 38583 0 37994
26. e line item at time of purchase and ona per unit basis Factory calibration will require the specification of input type input range zero input range full scale Steinhart Hart or Beta constants for Thermistor input types and output range Normal or reverse acting output and a filter level can also be specified Use form 8500 858 for specifying this calibration from our web site at www acromag com The standard model without adding custom factory calibration is calibrated by default to reference test conditions Recalibration of any transmitter will require use of a TTC SIP configuration kit ordered separately see Accessories section Modules can be mounted on standard 35mm T Type DIN rail Input Reference Test Conditions Potentiometer Slidewire 0 to 100 input Filtering Medium Output 4 to 20mA ascending R Load 2500 Ambient 25 C Power supply 24VDC Input Excitation Voltage Thermistor Rheostat Set to 1 25V DC with less than 30ppm C drift over temperature current limited to 0 125mA typical Potentiometer Set to 0 3V DC current limited to 3 35mA typical Input Overvoltage Protection Bipolar Transient Voltage Suppressors TVS rated up to 5 6V working voltage typical Also includes capacitive filtering and series resistance Input Filtering Normal mode RC filtering plus digital filtering optimized and fixed per input range and filter selection within the X A ADC See Normal Mode Noise Rejection and Output
27. e operation e Thoroughly tested and hardened for harsh environments e CE Approved e UL cUL Class1 Division 2 Approved The TT234 transmitter is designed for high density mounting on 35mm T type DIN rails Modules may be mounted side by side on 0 5 inch 12 5mm centers This model interfaces with thermistor and potentiometer rheostat inputs and isolates the input signal allowing it to mate with grounded or non grounded input signals It provides an output signal linearized to the thermistor sensor temperature Optionally it can support simple resistance input and drive an output signal linear with sensor resistance The output signal is transmitted via a two wire 4 20mA current loop The two wire current signal can be transmitted over long distances with high noise immunity Its inherent live zero 4mA offset current offers built in output fault detection should an output wire break Extra connection screws at the output allow it to be optionally wired for a sourced 4 20mA output configuration see Optional Output Wiring Acromag Inc Tel 248 295 0880 4 http www acromag com Model TT234 0600 Mechanical Dimensions Modules may be mounted to 35mm T type DIN rail 35mm type EN50022 and side by side on 12 5mm 0 5 inch centers NOTE IEC Safety Standards may require that this module be mounted within an approved metal enclosure or sub system particularly for applications with exposure to voltages g
28. ed In any case be sure to power the loop with a voltage that is minimally greater than the 11V required by the transmitter plus the IR drop of the wiring and terminals plus the IR drop in the load To computer the IR drop be sure to use a current level that considers the over scale current up to 24mA Loop Power Supply Voltage Make sure your voltage level is at least 11V plus 0 020 load_resistance Ideally it should be great enough to drive the 24mA over range current into your load i e up to 11V 0 024 Rload assuming line drop is negligible and the maximum possible over range is considered Always apply power to the transmitter output loop even when connected to USB Connect to PC via USB Refer to USB Connections section and connect the transmitter to the PC using the USB isolator and cables provided in the Configuration Kit TT SIP Now that you have made your connections and applied power to your loop you can execute the TT234 Config exe software to begin configuration of the transmitter software is compatible with XP or later versions of the Windows Operating system Acromag Inc Tel 248 295 0880 14 http www acromag com Model TT234 0600 Connections 7234 Configuration Software File Help DEVICE SELECT Device Status Communication Setup 1 0 Config Test Thermistor Config Table Calibration En i 1T234 0600 0000001 X Model Serial Number Manufacturer Select device then c
29. ended for sensitive applications with high speed acquisition rates High frequency noise is often reduced or eliminated by placing a 0 1uF capacitor directly across the load For excessive 60Hz supply ripple with current output a 1uF or larger bulk capacitor is recommended at the load Output Power Supply This device is output loop powered from 12 32VDC SELV Safety Extra Low Voltage 24mA maximum The supply voltage across the transmitter must never exceed 36V even with a shorted load The supply voltage level must be chosen to provide a minimum of full scale current to the load 0 020 R typical plus 11V minimum to the transmitter terminals plus any line drop Ideally the supply should drive over scale current levels up to 24mA into load Reverse polarity protection is inherent as output terminals are not polarized The output polarity labels on the enclosure are for reference only CAUTION Do not exceed 36VDC peak to avoid damage to the transmitter Terminal voltage above 11V minimum must be maintained across the transmitter during operation Output Power Supply Effect Less than 0 001 of output span per volt DC of supply change Output Compliance and Load Resistance Equation 11V minimum transmitter Transmitter will drive 13V typical to the load with a 24V loop supply and 20mA loop current 650Q assuming negligible line drop Compute Rioag Max Vsuppiy 11V 0 020A for 20mA full scale output current Refer to the fol
30. ep Before attempting to reconfigure or recalibrate this transmitter verify the following electrical connections Connect Input NU Connect Connect PC USB Output Power Configure Optional Calibrate I O Calibration Connections NOTE When calibrating the input source output meter and load resistor for current output must be accurate beyond the transmitter specifications or better than 0 1 As a general rule calibration equipment accuracy should be four times better than the rated accuracy you are trying to achieve with this transmitter Connect Input Connect a precision resistance decade box to the input at for Thermistors and Rheostats or at TB1 with pins 2 unused and TB2 for Potentiometers refer to Sensor Input Connections The resistance source must be adjustable over the range desired for zero and full scale Calibration amp Configuration Connections Connect Output Power Refer to Output Power Connection section and wire an output current loop to the transmitter as illustrated You will need to measure the output current accurately in order to calibrate the transmitter You can connect a current meter in series in this loop to read the loop current directly not recommended Alternatively you could simply connect a voltmeter across a series connected precision load resistor in the loop and accurately read the output current as a function of the IR voltage drop produced in this resistor recommend
31. er If the transmitter is mounted in a metal enclosure an earth ground wire connection to the metal enclosure s ground terminal green screw is usually required using suitable wire per applicable codes See the Electrical Connections Drawing for Output Power connections and note the traditional position of earth ground for the two wire output current loop Earth ground is normally applied at the output loop power minus terminal and in common with the loop load or loop receiver minus The Type II transmitter output terminals have a floating connection relative to earth ground and their potential varies with the voltage drop in the load and connection wire e Respect the traditional position of earth ground in a two wire current loop and avoid inadvertent connections to earth ground at other points in the output circuit which would drive ground loops and negatively affect operation The input circuit is isolated and may additionally be earth grounded e A USB isolator is recommended when configuring or calibrating a transmitter to avoid the ground loop that occurs if the input sensor is also earth grounded PC USB ports are commonly earth grounded and make contact with both the USB signal and shield ground which is held in common to the input circuit ground of the transmitter Acromag Inc Tel 248 295 0880 10 http www acromag com Model TT234 0600 USB Connections Thermistor Potentiometer Rheostat Transmitter w USB This transmitter
32. fficients The Configuration Software will then generate a custom Thermistor Resistance Temperature table using the Steinhart Hart equation and the coefficients submitted 18 http www acromag com Model TT234 0600 Configuration File Help Communication Setup 1 0 Config Test Thermistor Config Table Calibration THERMISTOR RESISTANCE TEMPERATURE TABLE Status Temperature C Resistance KO l Read Table from Unit BP 1 40 00 239 8000 Table Preset Bp2 35 00 179 2000 a o EFT R25 10K pasyas 3694 BP4 25 00 102 9000 Table Options BP5 20 00 78 9100 z all Number of BP 29 BP 6 15 00 61 0200 x BP7 10 00 47 5400 Temperature Units BPS 5 00 37 3100 E Celsius BP9 0 00 29 4900 lemts Fahrenheit BP 10 5 00 23 4600 Kelvin BP 11 10 00 18 7900 BP 12 15 00 15 1300 Resistance Multiplier BP 13 20 00 12 2600 xf Ohne BP 14 25 00 10 0000 x1000 KOhms BP 15 30 00 8 1940 BP 16 35 00 6 7520 a S Validation Check BP 17 40 00 5 5920 BP 18 45 00 4 6550 Display Graph BP 19 50 00 3 8930 OO BP 20 55 00 3 2700 Ieee co 00 PERF 5 Send Table to Unit No Device Connected HELP You can press F1 for Help on a selected or highlighted field or control You can also click the button in the upper right hand corner of the window and click on a field or control to get a Help message pertaining to t
33. fficients submitted Note Input fields are pre scaled by the multiplier value displayed to the right of each field For example to submit 0 001468 For coefficient A enter 1 468 in the input field x10 4 3 x10 4 x0 7 oo Acromag Inc Tel 248 295 0880 Thermistor Potentiometer Rheostat Transmitter w USB Click the Thermistor Config Table tab to begin configuring the thermistor table After clicking this tab the software retrieves the connected transmitter s current thermistor table configuration and displays it similar to the image shown at left If you are connected to a transmitter the initial Thermistor Config Table page represents the current thermistor table configuration of the connected transmitter before making changes Otherwise if you have loaded the configuration from a saved a file or if you have made changes to any fields you can click the Read Table from Unit button to retrieve the transmitter s current thermistor table configuration NOTE If you make any changes to the table or selections indicated the only way to preserve your changes is to write them to the transmitter by clicking the Send Table to Unit button after completing your changes or save them to a file by opening the File menu in the upper left hand corner of the window Optional Select the Table Preset Selecting a preset loads the Thermistor Table with sample values based on popular thermistor se
34. he item you clicked on Validation Color Key Indication The break point contains a duplicate temperature duplicate resistance invalid temperature zero resistance or the resistance does not decrease with increasing temperature Fix the break point to proceed Linear regression was performed on this break point instead of logarithmic regression The break point is still valid and will be included in the internal representation Acromag Inc Tel 248 295 0880 Thermistor Potentiometer Rheostat Transmitter w USB Enter the Number of Break points You can control the number of break points i e rows in the Thermistor table by changing this value The number of break points is limited to a minimum of 3 and a maximum of 50 NOTE More break points allow the software to generate a more accurate internal representation of the thermistor over the ranges that the break points characterize Select the Temperature Units Select the temperature units to use in the Thermistor Config Table You may select Celsius Fahrenheit or Kelvin The table will automatically convert the temperature column from the previous temperature to the selected temperature Select the Resistance Multiplier Select the resistance multiplier You may select x1 Ohms or x1000 Kilohms The table will automatically convert the resistance column from the previous resistance to the selected resistance Editing the Thermistor Table The c
35. iCtion esis o osi Seas tah szeucsendects xs uasbsses o eia aapa eaaa E Ehara ieaoo ini oiana aoe sienas baes 33 Configuration Controls nasii E a e a 33 REVISION HISTORY issi isorinis eseu esiou ene nesi e n A All trademarks are the property of their respective owners IMPORTANT SAFETY CONSIDERATIONS It is very important for the user to consider the possible adverse effects of power wiring component sensor or software failures in designing any type of control or monitoring system This is especially important where economic property loss or human life is involved It is important that the user employ satisfactory overall system design It is agreed between the Buyer and Acromag that this is the Buyer s responsibility The information of this manual may change without notice Acromag Inc makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Further Acromag Inc assumes no responsibility for any errors that may appear in this manual and makes no commitment to update or keep current the information contained in this manual No part of this manual may be copied or reproduced in any form without the prior written consent of Acromag Inc Acromag Inc Tel 248 295 0880 3 http www acromag com Model TT234 0600 GETTING STARTED DESCRIPTION Key Features Application For additional information on these devices and re
36. input and output span Accuracy includes the combined effects of repeatability terminal point conformity and linearization but does not include sensor error Output Response Time Varies with input filter level for a step change in the input signal also varies with output load Note The ADC requires two samples to fully characterize the input signal see Input Sampling Rate Filter Level Response Time Typical High Filter 1200ms Acromag Inc Tel 248 295 0880 29 http www acromag com Model TT234 0600 Thermistor Potentiometer Rheostat Transmitter w USB Output DAC Resolution Output DAC is 16 bit and its output current is approximated via the expression programmed_count 65536 24mA The min loop current is 3 5mA typical which is approximated via a DAC program count of 9120 Likewise 4mA corresponds to a count value of 10923 and 20mA to 54613 Thus for the 4 20mA output range we have an output resolution of 54613 10923 or 1 part in 43690 The effective I O resolution of this transmitter will be the lowest resolution of either the input or the output Output Ambient Temperature Drift Includes the combined effects of zero and space drift over temperature and is better than 80ppm C 0 0080 C over the ambient temperature range for reference test conditions see Input Specifications Output Ripple Noise Less than 0 1 of output span Note High Speed Acquisition Additional filtering at the load is recomm
37. is configured and calibrated via configuration software that runs on Windows based PCs connected to the transmitter via USB Windows XP or later version required Refer to the following drawing to connect a PC to the transmitter for the purpose of configuration and calibration using this software TT SERIES USB TRANSMITTER CONNECTIONS USED FOR CONFIGURATION AND CALIBRATION OF THE TRANSMITTER IN A SAFE OR ORDINARY LOCATION S TB3 5 NOTE USER MUST MEASURE E E LOAD DW OUTPUT POWER SIGNAL TO CALIBRATE OUTPUT RUNNING WINDOWS OS 8 HE7 TB4 TB3 COM OUTPUT HOST PC RUNNING l ACROMAG CONFIGURATION USB MiniB MALE SOFTWARE O DC POWER PPLY ey MODEL TT2XX TRANSMITTER ie DN Em USB MiniB Socket l i Front Panel of Module 2 7 ee TO HOST USB PORT g i TB2 TB o 5 0 UO INPUT INPUT 8 o dh i emn f a USB A MALE n HOST USB SERIAL 7 O PORT CONNECTOR 1 METER USB CABLE USB B MALE Acromag USB A MALE AT BACK OF PC Model 4001 112 at ae 7 DR A 5 Refer to Configuration Software Kit Model TTC SIP which includes Qrowen connection 1 ea Mo
38. is out of specification you can click the Calibration tab to display the Calibration control page shown at left IMPORTANT This transmitter has already had its input and output channels factory calibrated with a high level of precision If you attempt to recalibrate the input or output channel you could degrade its performance if it is not completed properly or it is done using lower grade equipment Consider your decision to recalibrate carefully Calibration Input Before attempting to recalibrate the input channel make sure the selected Input Type on the I O Config page is the desired sensor input type you intend to calibrate Additionally make sure you write your selections to the transmitter by clicking the Send I O Config button Click the Input Cal Instructions button to begin input calibration and enable the Input Zero Scale and Full Scale buttons Click the Input Zero Scale button of the Calibration Input section You will be prompted to input the zero scale resistance at TB1 TB2 for Thermistor Rheostat input types or connect input pins 3 amp 2 for Potentiometer input types Once you input the zero precisely or connect the input pins click the OK button of the prompt to calibrate zero scale Click the Input Full Scale button of the Calibration Input section You will be prompted to input the zero scale resistance at TB1 TB2 for Thermistor Rheostat input types or connect input pins 3 amp
39. lated topics please visit our web site at www acromag com Thermistor Potentiometer Rheostat Transmitter w USB The TT234 0600 is an ANSI ISA Type 2 transmitter designed to interface with thermistors and potentiometers rheostats isolate the input signal and modulate a 4 20mA current signal to drive a two wire current loop Thermistor sensor excitation linearization and lead break or sensor burnout detection are supported Configuration is performed using Windows software and a USB connection to Windows based PC s Windows XP and later versions only e Fully configurable via USB using Windows software e Thin 12 5mm wide enclosure for high density DIN rail mounting e High measurement accuracy and linearity e NTC Thermistors Potentiometers and Rheostats supported e User customizable Thermistor Linearization Table e Custom thermistor tables can be generated using Steinhart Hart coefficients e Thermistor inputs are linearized with respect to temperature e Supports Celsius Fahrenheit and Kelvin temperature units e Up or down scale lead break burnout detection e Adjustable input range and selectable output ranges e input and output circuits are fully isolated from each other e Convenient two wire loop power with non polarized output connections e Normal or reverse acting output e Namur compliant loop current e Variable input filter adjustment e Wide range DC power input from 12 32VDC e Wide ambient temperatur
40. lick open E TT234 Configuration Software File Help DEVICE SELECT Device Model Serial Number Manufacturer Status Communication Setup 1 0 Config Test Thermistor Config Table calibration TT234 0600 0000001 x 77234 0600 0000001 Acromag Inc Device opened successfully Reset Device Acromag Inc Tel 248 295 0880 Thermistor Potentiometer Rheostat Transmitter w USB NOTE You should already have power connected to the transmitter You will not be able to calibrate or test the transmitter without power applied After executing the Acromag Configuration software for this transmitter the window shown at left will appear if you have not already connected to the transmitter via USB note fields are blank under these conditions Connect your PC to the transmitter via USB and the transmitter s model serial information will appear in the device field as shown in the second window at left If you happen to be connected to more than one transmitter via a USB hub you can use the device scroll field to select another transmitter using the serial information suffix of the model number to discern one transmitter from another Select a transmitter from the drop down menu When you click on a transmitter name from the drop down menu the software will automatically attempt to open a connection with the selected transmitter If the software does not have an open con
41. ling to poll the input and display its value The LED next to the button will flash when polling is active Click Stop Polling to discontinue polling the input HELP You can press F1 for Help on a selected or highlighted field or control You can also click the button in the upper right hand corner of the window and click on a field or control to get a Help message pertaining to the item you clicked on NOTE A 5 under range and over range capability is built into the output range by design See Output Specifications for more detail Acromag Inc Tel 248 295 0880 Thermistor Potentiometer Rheostat Transmitter w USB Select the Temperature Units Select the temperature units to use in the I O Configuration You may select Celsius Fahrenheit or Kelvin Enter the I O Scaling values You may rescale the input range to use only a portion of the input range to drive the output if desired Be careful not to reduce the input range too much as resolution will be proportionally diminished and noise error magnified In the corresponding I O Scaling field enter the input signal minimum zero value to correspond to the output range Zero Scale value i e 4mA Also set the input range Full Scale i e 20mA You can optionally swap I O Scaling values to configure a reverse acting output response if desired Note Approximately 5 under range and over range is built into the output range If the I O Sc
42. lowing table Veupply Volts Max Rigag W 20MA amp No Line Drop 24V 32V Ideally it should be possible to drive the over scale current of 24mA to the load and this would yield a maximum load resistance of 5400 for 24mA of loop current and a 24V loop supply Output Load Resistance Effect Less than 0 001 of output span for a 1000 change in load resistance Acromag Inc Tel 248 295 0880 30 http www acromag com Model TT234 0600 USB Interface IMPORTANT The input of this transmitter is isolated from its output and can be connected to grounded or un grounded input sensors However the transmitter s input circuit ground is connected in common to the USB power signal shield ground This will in turn make a connection to earth ground at the PC when directly connected to the USB port of a PC without using an isolator Failure to connect USB without isolation would connect the 1 25V input bias supply to input ground if the sensor is also earth grounded This will interfere with operation and cause the output to shift For this reason USB isolation is strongly recommended when connecting to a PC Otherwise in the absence of USB isolation and when connected to a grounded input sensor a battery powered laptop could be used to connect to the transmitter as the laptop does not normally connect to earth ground Acromag Inc Tel 248 295 0880 31 Thermistor Potentiometer Rheostat Transmitter w USB Tr
43. makes two steps in its transition to its final level Output goes to Over Range 24mA or Under Range Limit 3 5mA This indicates that either the input signal is out of range or a sensor lead has broken It can also occur due to contention between earth ground at the PC USB port and the input sensor 24 Check the input signal with respect to its range and reduce or increase it as required to drive the output within its linear operating range A fully Over Range or Under Range signal can be driven by a sensor fault such as an open or broken sensor lead If USB is not isolated check for a ground loop between a grounded sensor and earth ground of the PC USB port http www acromag com Model TT234 0600 Thermistor Potentiometer Rheostat Transmitter w USB Diagnostics Table POSSIBLE CAUSE POSSIBLE FIX Cannot Calibrate Input Channel Is input wired properly Check that input is wired to input terminals using correct polarity Input may be wired incorrectly to Verify that the sensor or resistance decade the input terminals box is wired to the transmitter correctly Refer to Sensor Input Connections for wiring sensors to the transmitter Service amp Repair Assistance This transmitter contains solid state components and requires no maintenance except for periodic cleaning and transmitter calibration and verification zero and full scale Its enclosure is not meant to be opened for access and ca
44. mmed input range is reduced Likewise error is magnified as the input span is reduced Input Lead Resistance Effect For Thermistor Rheostat Input Types Shift less than 0 01 per ohm of lead resistance with a max shift less than 0 1 with up to 100 per lead with Input Span gt 25KQ Lead Break Sensor Burnout Detection For Thermistor Rheostat Input Types Can be set for Over range or Under range open sensor or lead break detection Over range output limit is approximately 24mA Under range limit is approximately 3 5mA Noise Rejection Common Mode Varies with input and input filter selection between 89aB no filter and 124dB high filter typical with 1000 input unbalance Noise Rejection Normal Mode Varies with input and input filter selection Table below indicates the typical rejection at 60Hz for each input and input filter selection Note that at the medium and high filter settings the ADC converter adds 80dB minimum of rejection for frequencies between 49Hz and 61Hz Typical 60Hz Rejection per Input Filter None tow Medium tics 17dB 34dB gt 80dB gt 80dB Output Range 4 to 20mA DC nominal range with under range capability down to 3 5mA and over range capability up to 24mA The output signal is linear with respect to the measured temperature or resistance Output Accuracy Accuracy is better than 0 05 of span typical 40 1 maximum for nominal input spans Relative accuracy varies with calibrated
45. n be damaged easily if snapped apart It is highly recommended that a non functioning transmitter be returned to Acromag for repair or replacement Acromag has automated test equipment that thoroughly checks and calibrates the performance of each transmitter and can restore firmware Please refer to Acromag s Service Policy and Warranty Bulletins or contact Acromag for complete details on how to obtain repair or replacement Acromag Inc Tel 248 295 0880 25 http www acromag com Model TT234 0600 ACCESSORIES Thermistor Potentiometer Rheostat Transmitter w USB Software Interface Package USB Isolator USB A B Cable USB A mini B Cable Software Interface Package Configuration Kit Order TTC SIP e USB Signal Isolator e USB A B Cable 4001 112 e USB A mini B Cable 4001 113 e Configuration Software CDROM 5040 944 This kit contains all the essential elements for configuring TT230 amp TT330 family Transmitters Isolation is recommended for USB port connections to these transmitters and will block a potential ground loop between the PC and a grounded current loop A software CDROM is included that contains the Windows software used to program the transmitter USB Isolator Order USB ISOLATOR e USB Signal Isolator e USB A B Cable 4001 112 e Instructions 8500 900 This kit contains a USB isolator and a 1 meter USB A B cable for connection to a PC This isolator and cable are also included in TTC SIP see above
46. nection with the transmitter click the Open button to open a connection with the transmitter After opening a connection to a transmitter the transmitter s Model Serial Number Manufacturer and connection status will be displayed as shown in the image on the left In addition the Status field will indicate Device opened successfully as shown in the image at left 15 http www acromag com Model TT234 0600 Configuration r 17234 Configuration Software File Help Communication Setup I O Config Test Thermistor Config Table Calibration CONFIGURE I O Get I O Config Input Options Input Type Potentiometer Slidewire 1002 to 100KQ Input Fitering Medium 140 miliseconds x Output Options Break Direction Under range Temperature Units Celsius Fahrenheit Kelvin I O Scaling 0 00 4m Out 100 00 20m Out Status No Error Send I O Config TEST I O StartPoling Percent Click Start Polling to poll the input and display its value The LED next to the button will flash when polling is active Click Stop Polling to discontinue polling the input HELP You can press F1 for Help on a selected or highlighted field or control You can also click the button in the upper right hand corner of the window and click on a field or control to get a Help message pertaining to the item you clicked on Acromag Inc Tel 248 295 0880 Thermistor P
47. nsmitter e Select the Input Type Potentiometer Slidewire Thermistor or Rheostat e Select the level of digital filtering High Medium Low or None The corresponding I O response times are listed in parenthesis next to the filter selection e Select the Break Direction Under range or Over range if applicable e Select the temperature units to use in the I O Configuration if applicable e Enter the I O Scaling Specify the input temperatures or percentages to correspond to Zero Scale and Full Scale e Submit the configuration settings to the transmitter by clicking the Send I O Config button to write the settings to the non volatile EEPROM memory 1 0 Test Optional Verify Transmitter Operation Here After making I O configuration changes you can use the I O Test controls to start stop polling the input channel to check your input readings Click Start Polling to periodically read your input channel and validate its operation Click Stop Polling to stop polling the input channel Note the simulated red lamp next to the button flashes slowly when the software is polling the input channel For detailed configuration and calibration procedures see the Operation Step By Step section of the Technical Reference of this manual on Page 14 12 http www acromag com Model TT234 0600 Quick Overview File Help Communication Setup 1 0 Config Test Thermistor Config Table Calibration THERM
48. nsors See Thermistor Resistance versus Temperature section of this manual for notes on calculating beta B Template presets automatically fill out the temperature column and space the break points by the degrees delta A listed in the preset name NOTE Whenever you modify the Thermistor Table the Table Preset will automatically change to Custom to indicate that the table is no longer identical to a selectable preset Using Steinhart Hart coefficients NTC Thermistors can be modeled using the Steinhart Hart equation This equation uses 3 coefficients to generate a resistance temperature curve which relates the thermistor resistance to the sensed temperature To assist the generation of break points for the thermistor table the Configuration Software provides a method for entering 3 Steinhart Hart coefficients Select Use Steinhart Hart Coeff from the Table Preset drop down menu to open the Steinhart Hart Coefficients prompt The Steinhart Hart Coefficients prompt contains three input fields one for each Steinhart Hart coefficient Enter the coefficients for your NTC thermistor in the appropriate input fields Notice that each field is already multiplied by a constant value For example the input field for coefficient A is multiplied by 10 Therefore to submit 0 001468 for coefficient A enter 1 468 in the corresponding input field After all 3 Steinhart Hart coefficients have been entered click Submit Coe
49. o Acromag Inc Tel 248 295 0880 Thermistor Potentiometer Rheostat Transmitter w USB Thermistor Config Table For Thermistor Input Types Only Define the Thermistor Characteristics Here e Optional Click the Read Table from Unit button to retrieve the Thermistor table stored on the currently connected transmitter e Select the Table Preset Templates will automatically fill out the temperature column e Set the number of Break points i e the number of rows in the Thermistor table e Select the temperature units to use in the Thermistor Config Table e Select the resistance multiplier This determines if the Thermistor Config Table resistance is in Ohms or Kilohms e Click the Validation Check button to have the configuration software check the Thermistor table breakpoints for extraneous or erroneous values Breakpoints that need attention are highlighted e Submit the Thermistor table to the transmitter by clicking the Send Table to Unit button to write the table to the non volatile EEPROM memory CALIBRATION Calibrate the Input and or Output if Needed This transmitter has already been factory calibrated If you encounter excessive error you can click the Calibration tab to display the Calibration control page as shown at left To calibrate the Input or Output stage of this transmitter simply click the respective Cal Instructions button and follow the prompts Input Click the Input Cal Inst
50. omag com Model TT234 0600 Thermistor Potentiometer Rheostat Transmitter w USB TT2XX MODULE DIN RAIL MOUNTING AND REMOVAL OUTPUT SIDE TOP oo IA QL 35mm DIN Rail Px LU m LU Ii BOTTOM INPUT SIDE ELECTRICAL CONNECTIONS TILT MODULE UPWARD TOWARDS RAIL AND HOOK ONTO UPPER LIP OF RAIL ROTATE MODULE DOWNWARD TO ENGAGE SPRING CLIP ONTO LOWER LIP OF RAIL js TT2XX MODULE T Rail SPRING CLIP gt SCREWDRIVER SLOT FOR REMOVAL FROM T TYPE DIN RAIL O USE SCREWDRIVER TO REMOVE MODULE FROM RAIL AS SHOWN Wire terminals can accommodate 12 26 AWG solid or stranded wire Input wiring may be shielded or unshielded type Ideally output wires should be twisted pair Terminals are pluggable and can be removed from their sockets by prying outward from the top with a flat head screwdriver blade Strip back wire insulation 0 25 inch on each lead and insert the wire ends into the cage clamp connector of the terminal block Use a screwdriver to tighten the screw by turning it in a clockwise direction to secure the wire 0 5 0 6Nm torque Since common mode voltages can exist on signal wiring adequate wire insulation should be used and proper wiring practices followed As a rule output wires are normally separated from input wiring for safety as well as for low noise pick
51. on 35mm T type DIN rail Dimensions Width 12 5mm 0 5 inches Length 114 5mm 4 51 inches Depth 99 0mm 3 90 inches Refer to Mechanical Dimensions drawing 1 O Connectors Removable plug in type terminal blocks rated for 12A 250V AWG 26 12 stranded or solid copper wire Program Connector USB Mini B type 5 pin See USB Interface Case Material Self extinguishing polyamide UL94 V O rated color light gray General purpose NEMA Type 1 enclosure Circuit Board Military grade fire retardant epoxy glass per IPC 4101 98 with humi seal conformal coating DIN Rail Mounting Transmitter is normally mounted to 35x15mm T type DIN rails Refer to the DIN Rail Mounting amp Removal section for more details Shipping Weight 0 5 pounds 0 22 Kg packed These limits represent the minimum requirements of the applicable standard but this product has typically been tested to comply with higher standards in some cases Operating Temperature 40 C to 80 C 40 F to 176 F Storage Temperature 40 C to 85 C 40 F to 185 F Relative Humidity 5 to 95 non condensing Isolation Input USB output power circuits are isolated from each other for common mode voltages up to 250VAC or 354V DC off DC power ground ona continuous basis will withstand 1500VAC dielectric strength test for one minute without breakdown Complies with test requirements of ANSI ISA 82 01 1988 for voltage rating specified Installation Category
52. onfiguration software maintains a table that allows you to characterize the thermistor sensor that the transmitter will interface with When you enter break points into the Thermistor Table you are providing known values of the thermistor s resistance with respect to the temperature sensed These values are then used by the software to generate an internal representation piece wise linear of the thermistor that can be used by the transmitter Click on a cell to select it When a cell is selected you can modify its value by typing a number on the keyboard To save the value typed into the cell hit the enter key or advance the selection to a different cell You may select a range of cells using the mouse cursor Break points should characterize the thermistor over its range of application Using more break points will allow the software to calculate a more accurate internal representation NOTE It is not necessary to enter the break points such that they are in ascending or descending order of value The software automatically sorts the break points internally Validation Check Click the Validation Check button to have the software check the break points in the Thermistor Table for erroneous or extraneous values Break points that are flagged will be highlighted using the color scheme detailed in the Validation Color Key on the left 19 http www acromag com Model TT234 0600 Calibration Optional
53. otentiometer Rheostat Transmitter w USB At this point you can click the I O Config Test tab to begin configuring the transmitter or to optionally test its operation The I O Config Test window is the image shown at left When you click the I O Config Test tab the software retrieves the transmitter s current configuration and displays it similar to the image shown at left If you are connected to a transmitter the initial I O Config page represents the current configuration of the connected transmitter before making changes Otherwise if you have loaded the configuration from a saved a file or if you have made changes to any fields you can click the Get I O Config button to retrieve the transmitter s current configuration NOTE If you make any changes to the selections indicated the only way to preserve your changes is to write them to the transmitter by clicking the Send I O Config button after completing your selections or save them to a file by opening the File menu in the upper left hand corner of the window Select the Input Type e Ifyou select Thermistor the output will be linear with respect to the sensor temperature e Ifyou select Potentiometer Slidewire the output will be linear with respect to the percent of input span not temperature and no special linearization will be performed If you select Rheostat the output will be linear with respect to the input resistance
54. reater than or equal to 75VDC or 50VAC Thermistor Potentiometer Rheostat Transmitter w USB DIMENSIONS ARE IN MILLIMETERS INCHES DIN Rail Mounting amp Removal Acromag Inc Tel 248 295 0880 Refer to the following figure for mounting and removing a module from the DIN rail Mounting A spring loaded DIN clip is located on the input side bottom The rounded edge of the output side bottom allows the module to tilt upward so that it may be lifted from the rail when prying the spring clip back with a screwdriver To attach a module to T type DIN rail angle the top of the module towards the rail and place the top groove of the module over the upper lip of the DIN rail Firmly push the module downward towards the rail until it snaps into place Removal To remove a module from the DIN rail first separate the input terminal blocks from the bottom side of the module to create a clearance to the DIN mounting area A screwdriver can be used to pry the pluggable terminals out of their sockets While holding the module in place from above insert a screwdriver into the lower path of the bottom of the module to the DIN rail clip and use it as a lever to force the DIN rail spring clip down while pulling the bottom of the module outward until it disengages from the rail Tilt the module upward to lift it from the rail http www acr
55. ructions button to begin input calibration When you click Zero Scale or Full Scale of the Input Calibration section you will be prompted to connect input pins together or apply a specific resistance at the input terminals Once you have applied this resistance or connected the correct input pins click the OK button of the prompt to calibrate the input Output Click the Output Cal Instructions button to begin output calibration When you click Zero Scale or Full Scale of the Output Calibration section you will be prompted to measure the output signal and enter the measurements in the field provided Click the Submit Measurement button to calibrate the output Factory Settings Use only in case of trouble or for sanitation purposes e Restore a transmitter to its original factory calibration e Restore a transmitter to its initial factory configuration You can click the Restore Factory buttons if you ever misconfigure or miscalibrate a transmitter in such a way that its operation appears erratic Calibration Status Bottom of Window The Calibration Status bar at the bottom of the window will display status messages relative to calibration over USB 13 http www acromag com Model TT234 0600 Thermistor Potentiometer Rheostat Transmitter w USB TECHNICAL REFERENCE OPERATION STEP BY STEP Connections This section will walk you through the Connection Configuration Calibration process step by st
56. scscssessscessssecess 24 DIETARA Oa E e Ea EA E T E 24 Service amp Repair Assistance ssssssssssssessosssosssosssssssssssscsssosssosssossesssssssssesssessssssssossssssssse 25 Acromag Inc Tel 248 295 0880 2 http www acromag com Model TT234 0600 Thermistor Potentiometer Rheostat Transmitter w USB Software Interface Package iis oere ai i oent E EE EANES EEEa EEES 26 USB ISG AL OM insisi nerens eain tees oi axiiascenseurssushasssceesuotnesendelasdenseeayieuwoles dein euasa tein sacedesThpaabos 26 USB A B Cables eenean EEEE E EEE Eea o 26 USB A mini B Cail e sg Arareo rennene netan eenean chaanbentaestassenenesnsueesnasassaneseuseoataenelaanueuaante 26 Model NUMBER iss ciiesistsiassiss Gausyesseshoavevivaweueussisisscaseuedesskonssivacedueebsuaabep tandadestahusurdeaved e iian 27 a ice scn Aiccctssocswatseestenssstsstesccevccvsescesesaseusecieesbetedssesecsaus covestusssvessnttecsdewedessscsssacsiaeeneesss 27 OUT DUE siccsnuccvseteudencisaaecaceseuscocesshncsseteuses ch edeueseveussssabedaeesceusdescoaudesuu stews cosdsausewsstandensSeauees 29 USB Interfaccia aere naea eraa NEEE EEE E r Carrat 31 Enclosure amp PRYSICAl isiicicesccccnnsnesdaasendesievuctsssscaunscwenteebasassddenuescouasaucrsuasunedesheuassidecunseeescuutees 32 Enviromental ois cacexssscacseceoctosecwscaassisseacwecnsrvssasswcncs eiesinesaiasstemeamuunadedeachaseseaanoraans staan ENSERES 32 Agency Approvals ccc inci aici Wises ee iii et i aes 33 R li bility Pre G
57. ssssssssssssosssesse 7 Output Power Connections ssssssssseseseseseseseseseseseseserenereseseneeeseseneneseseneneserenerererenereresese 8 Earth Ground Connections sssssssosssseesssssesssessoosssscesssssesssesscossssoosssseessseseeessssoosessoosssseeeee 10 USB CONNGCUIONS vavcicdscces cccesecccesssvcuactectcxediesscdesvectevesceseetesesctendcvectcdecuessctassrcoeventssteucdeesuctess 11 CONFIGURATION SOFTWARE ssessssssesssoscesesossesesoscssesoscssssoscssesososseses 12 QUICK OVERVIEW siscsicciiccicssocsscseccnccsccccsscdestonsetcacessepaedsveweedcvacedanscbesbuscoswerenscusecwadesasdcedearebvess 12 OPERATION STEP BY STEP scscscsccsscavnasusesceescsinaensoasieadscscseanmeseseacenaesnnasesavens 14 COMMECTIONS si cosdedes ces civesccceescesascecesccvavaceseececpsevccussseceretossscndesenduscscvseduessscterecdecvaccurscvseseeve 14 Config ratiOM scat vstiealehcasnndtaeanniicrnaiaes aeiaaeeo ee aea eo dries eaaa eea ieee ia aE 16 Calibration Optional sssssssessssseesosssssessesoesssseesessessosssssessssoesessessessescosesssessenoesesssssessseeee 20 Thermistor Resistance versus Temperature sssssssesssssssssesssossssocssssessssessccssseoosssseosssesesse 22 BLOCK DIAGRAM acswisavavacaricnse side vaccbacuueai save a a a a 23 How TE WOKS iss cade ard atennsadeatwnsniaciabensintaccns eanaucuacanaesucesssbaudacinsunsedsexcudeebansiieasebencaciseimsnssnds 23 TROUBLESHOOTING cscsccscsccccscsccccscsccccscsccscscsscscscsss
58. t ground is common to the input circuit ground The USB port ground of most PC s is also common to the USB cable shield and earth ground Input sensors could be grounded or ungrounded For this reason it is recommended that USB signals be isolated when connected to a PC to prevent a ground loop from occurring between the PC earth ground and a grounded input sensor which would have the negative affect of pulling the input bias supply to ground clipping the negative portion of the bipolar input range 23 http www acromag com Model TT234 0600 TROUBLESHOOTING Diagnostics Table Before attempting repair or replacement be sure that all installation and configuration procedures have been followed and that the transmitter is wired properly Verify that power is applied to the transmitter and that the supply voltage is at least 11V If the problem still exists after checking the wiring and reviewing this information or if other evidence points to another problem with the transmitter an effective and convenient fault diagnosis method is to exchange the questionable transmitter with a known good transmitter Acromag s Application Engineers can provide further technical assistance if required Repair services are also available from Acromag Acromag Inc Tel 248 295 0880 Thermistor Potentiometer Rheostat Transmitter w USB Transmitter fails to operate or exhibits an output shift A missing USB Isolator could ca
59. top Polling to discontinue polling the input Acromag Inc Tel 248 295 0880 Thermistor Potentiometer Rheostat Transmitter w USB This transmitter can only be configured and calibrated via its configuration software and a USB connection to a PC or laptop The configuration software is contained in a zip file that can be downloaded free of charge from our web site at www acromag com If you do not yet have a user account you will need to create one before the download becomes accessible The zip file will extract to an executable file which installs software to the Program Files Acromag directory on your computer Note You need administrator privileges on the PC you wish to install this software Once installed navigate to the Program Files Acromag directory and open the correct software for your particular model This software is also included on a CDROM bundled with the Configuration Kit TTC SIP see Accessories For this transmitter use the software named TT234 Config exe Communication Setup First Connect to Transmitter Here e Select from connected transmitters and Open Close communication with them e Display the Model Serial Number and Manufacturer of the connected transmitter and report the status of communication 1 0 Config Test Configure and or Test the Transmitter Here e Optional Click the Get I O Config button to retrieve the I O configuration of the currently connected tra
60. up Acromag Inc Tel 248 295 0880 6 http www acromag com Model TT234 0600 Sensor Input Connections Thermistor Potentiometer Rheostat Transmitter w USB Sensor wires are connected directly to the transmitter input terminals at the bottom of the transmitter the spring loaded DIN clip side as shown in the connection drawing below Transmitter Input Signal is Isolated from Output Inputs are polarized and connections for Thermistors and Rheostats can be swapped H and connections for Potentiometers can be swapped to reverse the direction of the input signal Observe the wiper input W when connecting a Potentiometer Only one input sensor may drive the output at one time NOTE Sensor lead wire resistance will contribute an input shift for Thermistor and Rheostat input types See Input Sensor Information below BOTTOM VI EW INPUT SIDE OUTPUT SIDE MODEL TT234 0600 INPUT SIDE INPUT SENSOR WIRING I OPTIONAL EARTH a4 GROUND TB3 Lj Geenote 1 Nc INPUT OUTPUT SHIELDED CABLE q ee cAn MIN 2y gt TB2 ee lt INPUT
61. use a ground loop between a grounded input sensor and earth ground at the connected PC s USB port Without a USB isolator a ground loop is possible between a grounded input signal source and earth ground of the PC USB port It is best to connect to USB via a USB isolator for this reason and for increased safety and noise immunity Use an isolator like the Acromag USB ISOLATOR Otherwise use a battery powered laptop to configure the transmitter which does not normally earth ground its USB port Software Fails to Detect Transmitter Bad USB Connection Recheck USB Cable Connection USB has not enumerated the transmitter Use the reset button on the Acromag USB isolator to trigger re enumeration of the transmitter or simply unplug re plug the USB cable to the transmitter Communication or power was interrupted while USB was connected with the configuration software running Close the current connection with the software select and re open the transmitter for communication or simply exit the configuration software and restart it For an input step the output appears to make 2 steps to reach its final value For a step change in the input the ADC requires 2 input samples to fully characterize the input signal The ADC requires two samples to fully characterize the input signal and this is evident when using a scope to examine the output transition in response to a step change at the input which
62. ut minus varies off this ground by the voltage drop in the load resistance and lead wire MODEL TT2XX 0600 OUTPUT POWER WIRING TRADITIONAL LOOP POWERED SINKING OUTPUT CONNECTIONS INPUT SIDE TOP VIEW OUTPUT SIDE OUTPUT SIDE 3 dm m THIS TRANSMITTER IS CURRENT LOOP POWERED SHIELDED L 4 20mA TB3 4 TWISTED PAIR eu Opp Te i N DO SUPPLY aO 12 32V ANY MODEL TT2XX 0600 Lanm COMMON Rioap _L EARTH GROUND NOTE OUTPUT TERMINALS ARE NOT POLARIZED AND PLUS amp MINUS LABELS ARE FOR REFERENCE ONLY OPTIONAL WIRING TERMINALS C ARE HELD IN COMMON AND USED FOR SOURCING LOOP WIRING SEE OPTIONAL OUTPUT WIRING DIAGRAM Se The traditional loop powered sinking output connections are shown above Shielded twisted pair wiring is often used at the output to connect the longest distance between the field transmitter and the remote receiver as shown The output of this transmitter fluctuates relative to earth ground by the voltage drop in the load and connection wire This makes it flexible in the way it connects to various Receiver devices Acromag Inc Tel 248 295 0880 8 http www acromag com Model TT234 0600 Thermistor Potentiometer Rheostat Transmitter w U
63. y is based on a sensor lead wire resistance of 00 To determine the Typical Accuracy in terms of temperature for custom thermistor input types use the following equation For a Thermistor with input resistance Ry Typical Temp Accuracy Thermistor Temp at Rz Thermistor Temp at R74 Rry Typical Accuracy This transmitter allows a portion of the nominal input range to be rescaled to the output range selected However the effective input resolution will be proportionally diminished as the input range span is reduced below its nominal span The effective I O resolution of this transmitter will be the lowest resolution of the ADC itself or the output DAC output DAC is 1 part in 43690 for 4 20mA Sampling Rate ADC Input is sampled at a variable rate according to the input filter selection as follows ADC Sampling rate Samples Second per Input Filter None tow Medium Hish 214 65sps 53 6625sps 13 42sps 1 6775sps Acromag Inc Tel 248 295 0880 28 http www acromag com Model TT234 0600 Output Thermistor Potentiometer Rheostat Transmitter w USB Input Zero and Full Scale Adjustment Nominal input ranges are selectable and range endpoints are adjustable over the full range of input temperature resistance Input Zero and Full Scale selections must be within the nominal range and will be mapped to 0 and 100 at the output Keep in mind that the input resolution diminishes below nominal as the progra

8500994 TT234-0600 User`s Manual

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