DUAL RTD INPUT. State-of-the-art Electromagnetic Noise Suppression Circuitry. Ensures signal integrity even in harsh EMC environments.

Transcription

1 DUAL RTD INUT Fits Tiger 320 Series 8-pin Input Connector. Dual 4-wire RTD inputs. State-of-the-art Electromagnetic Noise Suppression Circuitry. Ensures signal integrity even in harsh EMC environments. Ultra low-noise 6-bit SD Dual Channel ATD. Approaching 9-bit performance with additional software filtering. On-board Digital Signal rocessor. roduces 0Hz averaged output of each RTD Signal. Monitors RTDs for O/C conditions. Interface to Tiger Meter. Crystal Controlled Line Frequency Rejection. 50 / 60Hz line frequency rejection. Unprecedented 0.0 accuracy on two channels. Designed for applications in precision temperature measurement and calibration systems, the dual channel RTD input module interfaces directly with all Tiger 320 Series controllers. Using 4-wire RTDs, 0.0 resolution and repeatability is possible on each channel Input Module Order Code Suffix IST5 (50 Hz Rejection) IST6 (60 Hz Rejection) Hardware Module Specifications Dual Inputs 4-wire RTD, choice of t 385 or t /960 sample rate per channel. 0 Hz average output per channel. Excitation Current Resolution Analog-to-Digital 200 µa constant current source. Ratiometric referenced to ATD. Current sense for open circuit RTD. 0.0 on each channel. Dual channel Σ ATD convertor approaching 9-bit resolution operating ratiometric with respect to excitation current. SECIAL ROCESS 4 / 20 ma / 5 V VOLTS AC / DC AMS AC / DC WATTS AC / DC INUTS Line Frequency Rejection Software Module Specifications 50/60 Hz selectable. Input Type Selection Select from either t 385 or t 392 for both channels. Calibration Easy calibration with wide operating temperatures through Tiger 320 Series software. LOAD-CELL RESSURE FREQUENCY RM, ulse, Counter TEMERATURE T/C, RTD IST5-6 Data Sheet (NZ359) Texmate, Inc. Tel. (760) age

2 rogramming Quick Start Guide Connector inouts Note: The trimpot is used dur ing factory calibrated to optimize internal RTD calibration algorithms. RTD RTD 2 + EXC + SENSE SENSE EXC + EXC 2 + SENSE 2 SENSE 2 EXC 2 IN IN 3 382A Trimpot Figure IST5 Input Module Configured f or Two 4-wire RTD Sensors RTD + EXC + SENSE SENSE EXC IN IN 3 Note: To complete the current pathw ay use links betw een pins 5 and 6, pins 6 and 7, and pins 7 and 8 to replace the missing RTD. + EXC 2 + SENSE 2 SENSE 2 EXC 2 382A Trimpot Figure 2 IST5 Input Module Configured for a Single 4-wire RTD Sensor Smart Setup Registers The Tiger meter uses three smart setup registers to configure all smart input modules. The IST5 input module requires only smart register (SMT) to be configured. See Figure 3. RTD Input Signal RTD2 Input Signal CODE 2 SMART REGISTER SETU OUTUT REGISTER MA SMT allo ws y ou to select The output register map Enter Code 2. the line frequency betw een allows you to select the Select smart register setup [X77]. 50 or 60 Hz and select the output from either RTD RTD type as t385 or t392 This allows you to enter smart register setup and select the input signal or RTD2 for CH, CH2, for both inputs. CH3, and CH4. frequency rejection and the R TD type. Note, the selected RTD type is for both inputs. SMART REGISTER 2 SETU Not required. RTD RTD2 CH CH2 CH3 CH4 SMART REGISTER 3 SETU Not required. Figure 3 IST5 Smart Setup Registers Operational Flow Diagram age 2 Texmate, Inc. Tel. (760) IST5-6 Data Sheet (NZ359)

3 Input module IST5 has tw o RTD inputs: RTD and R TD2. RTD is ph ysically connected to input and RTD2 is physically connected to input 2 of IST5 s dual channel, 6-bit A to D con vertor. See Figure 4. SMT resides in IST5 s microcontroller and allo ws you to select the R TD type to suit y our input. SMT applies a t 385 or t 392 linear ization table to both input and input 2. The IST5 input module produces two output registers, one for the averaged signal output from each RTD. The data from one of these registers can be tr ansferred to a channel in the Tiger meter. All four channels can be selected for either RTD or RTD2, or a combination of both inputs can be selected, f or example: RTD to CH. RTD2 to CH2. CH3 not used. CH4 not used. The channels are selected through the codes in the Tiger meter s main programming mode: RTD or RTD2 to CH via Code 2. RTD or RTD2 to CH2 via Code 4. RTD or RTD2 to CH3 via Code 5. RTD or RTD2 to CH4 via Code 6. Dual RTD 0.0 degree resolution. Functional Schematic RTD RTD 2 + EXC + SENSE SENSE EXC + EXC 2 + SENSE 2 SENSE 2 EXC 2 Constant current source Crystal Control 200 µa Input Input 2 Dual Channel 6-bit A/TD Ratiometric reference Eliminates any drift Microcontroller Comparator 'open RTD' senses O/C in connections + 5 V 5 V GND + 24 V I 2 C Bus Tiger Meter Fine Calibration Adjust Input Module IST5 CB 382 Figure 4 IDT5 Dual RTD Smart Input Module Functional Schematic rogramming rocedures The following programming procedures cover all the steps required to configure smar t input module IST5. Steps to 7 describe how to select the line frequency and the RTD type through SMT. Steps 8 to 2 describe how to select the output registers f or channels, 2, 3, or 4 as required. the and buttons at the same time to enter the main programming mode. 2 the button three times to enter Code 2. Set Code 2 to [X77]. SECOND DIGIT THIRD DIGIT This setting enters the smart register code setup menu. TIGER ROCESSING RATE 0 0 Hz 0 Hz 2 00 Hz 3 00 Hz MEASUREMENT TASK 0 Voltage, Current TC (3rd digit selects type of TC) 2 RTD 3-wire (3rd digit selects type of RTD) 3 RTD 2- or 4-wire (3rd digit selects type of RTD) 4 Frequency 5 eriod 6 Counter 7 Smart Input Module OUTUT REGISTER MA 0 RTD Average Output RTD2 Average Output 7 Smart input module register code setup Note the output registers in the 3rd digit are specific to the dual RTD input module. These registers vary for each different smart input module. IST5-6 Data Sheet (NZ359) Texmate, Inc. Tel. (760) age 3

4 3 the button. This men u provides settings unique to smart register of input module IST5. FREQUENCY SELECT 0-60 Hz rejection 3 50 Hz rejection SECOND DIGIT NOT USED 0 t 385 t THIRD DIGIT RTD TYE 4 Using the buttons, select either 50 or 60 Hz line frequency rejection in the st digit and either t 385 or t 392 the RTD type in the 3rd digit. 2nd digit settings are not relevant. 5 6 the button. The display returns to [Cod_2] [X77]. Using the button, reset the 3rd digit to z ero [X70] to leave the smart register menu. Note, leaving the 3rd digit as 7 means the displa y constantly cycles between [Cod_2] and [SMt]. 7 the and buttons at the same time to retur n to the operational display. Select a Channel Select the output register for the required channels 8 the and buttons at the same time again to re-enter the main prog ramming mode, then press the button three times to enter Code 2. Channel 9 Set Code 2 to [X7X]. Select the required processing rate for CH in the st digit and the required register map settings in the 3rd digit. CH Channel 2 TIGER ROCESSING RATE 0 0 Hz 0 Hz 2 00 Hz 3 00 Hz Note the output register map is different for each smart input module type. THIRD DIGIT OUTUT REGISTER MA 0 RTD Average Output RTD2 Average Output 7 Smart input module register code setup 0 Set Code 4 to [0X0]. Select the required register map settings f or CH2 in the 2nd digit. CH2 MEASUREMENT TASK 0 Voltage, Current TC (type as per 2nd digit) 2 RTD (type as per 2nd digit) 3 Second Digital Input Channel (type as per 2nd digit) FOR VOLTAGE & CURRENT 0 Channel 2 Disabled Direct (no post processing) 2 Square Root of Channel 2 3 Inverse of Channel 2 4 Output Register (smart module)* 5 Output Register 2 (smart module)* 6 Output Register 3 (smart module)* 7 Output Register 4 (smart module)* SECOND DIGIT *Note: The logic f or CH2 is not the same as CH, CH3, or CH4. The st and 3rd digits must both be set to 0.Selecting 040 or 050 in the 2nd digit of Code 4 directly selects one of the f ollowing settings in the output register map (3rd digit): 2nd Digit 4 selects 5 selects Output Register Map 0 RTD Averaged signal RTD2 Averaged signal* age 4 Texmate, Inc. Tel. (760) IST5-6 Data Sheet (NZ359)

5 Channel 3 If required enter Code 5 and select the required register map settings for CH3 in the 3rd digit. CH3 Channel 4 CH3 OST ROCESSING 0 Direct Display of Input (no processing) Square Root of Channel 3 2 Inverse of Channel 3 3 Meters with 4 kb memory NO Linearization Meters with 32 kb memory 32-point Linear ization of CH3 using Table 3 Note: All linear ization tab les are set up in the Calibration Mode [24X]. THIRD DIGIT OUTUT REGISTER MA 0 RTD Average Output RTD2 Average Output 7 Smart input module register code setup Note the output register map is different for each smart input module type. If required enter Code 6 and select the required register map settings for CH4 in the 3rd digit. 2 CH4 the button to save the settings. the and buttons at the same time to return to the operational display. CH4 OST ROCESSING 0 Direct Display of Input (no processing) Square Root of Channel 4 2 Inverse of Channel 4 3 Meters with 4 kb memory NO Linearization Meters with 32 kb memory 32-point Linear ization of CH4 using Table 4 Note: All linear ization tab les are set up in the Calibration Mode [24X]. Calibration rocedures Calibrating the IST5 dual RTD smart input module is done in the f ollowing two steps: erform a simulated RTD input calibration procedure. erform a full scale calibration procedure. Simulated RTD Input Calibration rocedure To gain the best performance from and linearization of RTD signals, the input module should be initially calibrated using a simulated RTD input signal of 32 F (0 C). Fine calibration is a means of initially calibr ating the input module using tw o 00 Ω precision resistors to simulate an RTD input signal of 32 F. This is normally done before the input module leaves the factory. But, if recalibration is required, connect two 00 Ω precision resistors to the input module according to the connection diagram shown in Figure 6 and carry out the following steps. IN 00 Ω IN 3 00 Ω 2 382A Trimpot Figure 6 IST5 Fine Calibration Connection Dia gram IST5-6 Data Sheet (NZ359) Texmate, Inc. Tel. (760) age 5

6 ) Ensure that the line frequency rejection and R TD type settings for SMT have been set. See Steps 2 and 3 of the rogramming procedures. 2) Enter the main programming mode in your Tiger meter and set the offset setting to 0 (zero) and the span setting to (one) for CH and CH2 using the following codes: In CAL 000 for CH select 0 then press the button. Display toggles between OFF_ 0 Leave the offset setting [OFF_] at [0] and press the button. Display toggles between SCA_ Adjust the full scale setting [SCA_] to [] and press the Display returns to CAL 000 button. for CH2 select 02 then press the button. Carry out the same steps as for CH to to set the offset and full scale settings f or CH2. 3) While still in the main prog ramming mode set CH to displa y RTD and CH2 to displa y RTD2 using the following codes: for CH enter Code 2 and select RTD in the 3rd digit. See Step 9 on age 4. for CH2 enter Code 4 and select RTD2 in the 2nd digit. See Step 0 on age 5. 4) While viewing CH, adjust the trimpot until the display reads 3200 counts. This represents F. Both CH and CH2 are now calibrated. Full Scale Calibration rocedure The RTDs can be calibrated in F or C. A calibration source is the easiest method to calibr ate a zero and full scale setting, otherwise, the known resistance values for the temperatures must be used: RTD t 385: 0 C is equivalent to 00 Ω. 00 C is equivalent to 38.5 Ω. For example: Offset (low setting) is zero (0 C). Full scale setting is 00 C. Enter the calibration mode and carry out the procedure on age 7 for both CH and CH2. 00 Ω 00 Ω IN IN 3 rog. S S2 S4 S3 S5 S Ω 38.5 Ω IN IN 3 rog. S S2 S4 S3 S5 S6 Figure 7 IST5 2-point Calibration Diagram age 6 Texmate, Inc. Tel. (760) IST5-6 Data Sheet (NZ359)

7 STAR ART T HERE Operational Display From Step 6 at same time Step Enter the brightness mode Step 2 ass brightness mode and the enter calibration mode at same time Step 7 Step ohm 7.. Adjust the display to the desired reading for the span input setting 7.2. Connect the 38.5 ohm resistor to simulate the HIGH (span) input signal Save the zero and the span settings and re-enter the calibration mode OR Example Step 3 Set calibration mode to []: st Digit = Selects calibration procedures 2nd Digit = Selects 2-point calibration 3rd Digit = Selects CH for calibration Step 4 Enter calibration mode [] for 2-point calibration of CH OR [] for CH [2] for CH2 [3] for CH3 [4] for CH4 Step 9 Select the no function calibration mode [000] Step 0 Save calibration mode [000] setting and enter Code X OR Step Connect the 00 ohm resistor to simulate the LOW (zero) input signal Step 6 00 ohm 5.. Adjust the display to the desired reading for the zero input setting Set the reading for zero load into the meter and enter the span mode OR Example To Step 7 Step Exit code and return to operational display The meter is now fully calibrated across the range: 0 to 00 C at same time Operational Display at same time IST5-6 Data Sheet (NZ359) Texmate, Inc. Tel. (760) age 7

8 Customer Configuration Settings: st Digit 2nd Digit 3rd Digit CH st Digit 2nd Digit 3rd Digit CH3 st Digit 2nd Digit 3rd Digit 7 CH2 st Digit 2nd Digit 3rd Digit 0 0 CH4 st Digit 2nd Digit 3rd Digit 7 WARRANTY Texmate warrants that its products are free from def ects in mater ial and w orkmanship under normal use and ser vice for a per iod of one y ear from date of shipment. Texmate s obligations under this warranty are limited to replacement or repair, at its option, at its factory, of any of the products which shall, within the applicable period after shipment, be returned to Texmate s facility, transportation charges pre-paid, and which are, after e xamination, disclosed to the satisfaction of Texmate to be thus def ective. The warranty shall not apply to an y equipment which shall have been repaired or altered, except by Texmate, or which shall have been subjected to misuse, negligence, or accident. In no case shall Texmate s liability e xceed the or iginal purchase price. The aforementioned provisions do not e xtend the or iginal warranty period of any product which has been either repaired or replaced b y Texmate. USER S RESONSIBILITY We are pleased to offer suggestions on the use of our v arious products either by way of printed matter or through direct contact with our sales/application engineering staff. However, since we ha ve no control o ver the use of our products once the y are shipped, NO WARRANTY WHETHER OF MERCHANTABILITY, FITNESS FOR UROSE, OR O THERWISE is made beyond the repair, replacement, or refund of purchase pr ice at the sole discretion of Texmate. Users shall deter mine the suitability of the product f or the intended application bef ore using, and the users assume all risk and liability whatsoever in connection therewith, regardless of any of our suggestions or statements as to application or constr uction. In no event shall Texmate s liability, in law or otherwise, be in excess of the purchase pr ice of the product. Texmate cannot assume responsibility for any circuitry described. No circuit patent or software licenses are implied. Texmate reserves the right to change circuitry, operating software, specifications, and prices without notice at any time. For product details visit Tel: USA That s Kellogg Ave. Carlsbad, CA orders@texmate.com Web: age 8 Texmate, Inc. Tel. (760) IST5-6 Data Sheet (NZ359)