EZO. RTD Temperature. Temperature. Reads. Range C 1254 C Resolution / (0.10 C x C) Accuracy. 1 reading per sec.

Transcription

1 V 2.6 Revised /8/8 RTD Temperature EZO Circuit Reads Temperature Range C 254 C Resolution 0.00 Accuracy +/ (0.0 C x C) Max rate Supported probes Calibration Temperature output Data protocol Default I 2 C address Operating voltage Data format reading per sec Any type & brand PT-00 or PT-000 RTD Single point C, K, or F UART & I 2 C 02 (0x66) 3.3V 5.5V ASCII Electrical Isolation not needed Onboard Data Logger 50 Readings Written by Jordan Press Designed by Noah Press This is an evolving document, check back for updates.

2 This is sensitive electronic equipment. Get this device working in a solderless breadboard first. Once this device has been soldered it is no longer covered by our warranty. This device has been designed to be soldered and can be soldered at any time. Once that decision has been made, Atlas Scientific no longer assumes responsibility for the device s continued operation. The embedded systems engineer is now the responsible party. Get this device working in a solderless breadboard first! Do not embed this device without testing it in a solderless breadboard! A B C D E A B C D E F G H I J F G H I J

3 Table of contents Circuit dimensions Power consumption Absolute max ratings Temperature circuit range Temperature circuit accuracy Atlas Scientific PT-000 probe Using other brand PT-00/PT-000 Operating principle Calibration theory On board data logger Correct wiring Available data protocols UART I 2 C UART mode Default state Receiving data from device Sending commands to device LED color definition UART quick command page LED control Find Continuous reading mode Single reading mode Calibration Export/import calibration Temperature scale Enable/disable data logger Memory recall Memory clear Naming device Device information codes Reading device status Sleep mode/low power Change baud rate Protocol lock Factory reset Change to I 2 C mode Manual switching to I 2 C I 2 C mode Sending commands Requesting data codes LED color definition I 2 C quick command page LED control Find Taking reading Calibration Export/import calibration Temperature scale Enable/disable data logger Memory recall Memory clear Device information Reading device status Sleep mode/low power Protocol lock I 2 C address change Factory reset Change to UART mode Manual switching to UART Circuit footprint Datasheet change log Warranty Copyright Atlas Scientific LLC

4 EZO TM circuit dimensions 3.97mm (0.55 ) 20.6mm (0.79 ) 5.8mm (0.22 ) 8.38mm (0.32 ) 0.8mm (0.4 ) Power consumption Absolute max ratings LED MAX STANDBY SLEEP Parameter MIN TYP MAX 5V 3.3V ON 6 ma 5.4 ma OFF 5.3 ma 5 ma ON 4.3 ma 3.8 ma 0.4 ma 0.09 ma Storage temperature (EZO RTD) Operational temperature (EZO RTD) -65 C 25 C -40 C 25 C 85 C OFF 4 ma 3.6 ma VCC 3.3V 5V 5.5V 4 Copyright Atlas Scientific LLC

5 EZO TM RTD temperature circuit range 000 C 500 C 0 C -26 C 0 C 200 C 400 C 600 C 800 C,000 C,254 C EZO TM RTD temperature circuit accuracy 2 C 0 C -2 C -26 C 0 C 200 C 400 C 600 C 800 C,000 C,254 C 5 Copyright Atlas Scientific LLC

6 Atlas Scientific PT-000 probe Accuracy +/- (0.5 + (0.002*t)) Probe type: class A platinum, RTD Cable length: 8cm (32") Cable material: silicone rubber 30mm sensing area (304 SS) 6mm diameter BNC connector Reaction time: 90% value in 3 seconds Probe output: analog Full sensing range -200 C to 850 C Cable max temp 25 C Cable min temp -55 C The Atlas Scientific EZO RTD Temperature circuit only works with PT-00 and PT-000 probes. To read temperatures above, or below the max cable temperature, an additional probe housing (thermowell) is needed to protect the cable. 00mm Temperature Thermowell 50mm Temperature Thermowell 30mm Temperature Thermowell 6 Copyright Atlas Scientific LLC

7 Using other brand PT-00/PT-000 The EZO RTD Temperature circuit will auto-detect if the connected probe is PT-00 or PT-000. Probe class Accuracy AA +/- (0.0 C x T) A +/- (0.5 C x T) B +/-(0.3 C x T) C +/- (0.6 C x T) It makes no difference which lead of the temperature probe is connected to the two probe pins. 7 Copyright Atlas Scientific LLC

8 Operating principle The Atlas Scientific EZO RTD Temperature circuit is a small footprint computer system that is specifically designed to be used in robotic applications where the embedded systems engineer requires accurate and precise measurements of temperature through a generic PT-00/PT-000 temperature probe. RTD = Resistance Temperature Detector PT = Platinum PT-00 = 00 Ω at 0 C PT-000 = k Ω at 0 C Unlike any other material, platinums correlation between resistance and temperature seems to be woven into the fabric of the universe. It is for this reason, that the platinum RTD temperature sensor is the industrial standard for temperature measurement. Resistance Nickel 78 Pt Platinum Copper Platinum Temperature ºC 8 Copyright Atlas Scientific LLC

9 Calibration theory Calibration can be done at any value, a simple method is to calibrate the probe in boiling water. 00 C Atlas Scientific recommends calibration be done every three years. Elevation and Boiling Point table Elevation in meters Boiling point C C C C C C C Use purified/distilled water For accurate calibration using different temperature vaules, you must use a tool called a "dry block calibrator." 9 Copyright Atlas Scientific LLC

10 On board data logger 50 readings Programmable storage interval Minimum 0 seconds Maximum 320,000 seconds Temperature readings that are stored to the data logger will be retained even if the power is cut When memory becomes full, the data logger will overwrite memory location Copyright Atlas Scientific LLC

11 A B C D E F G H I J A B C D E F G H I J A B C D E F G H I J A B C D E F G H I J ELECTRICAL ISOLATION IS NOT NEEDED. Power and data isolation Copyright Atlas Scientific LLC

12 TM Correct wiring Bread board Bread board via USB Carrier board USB carrier board A B C D E A B C D E A B C D E A B C D E VCC GND TX RX PWR RX TX F G H I J F G H I J F G H I J F G H I J Atlas Scientific Part # COM-04 Part # ISCCB Part # USB-ISO Incorrect wiring Extended leads Sloppy setup Perfboards or Protoboards *Embedded into your device A B C D E F G H I J NEVER use Perfboards or Protoboards *Only after you are familar with EZO TM circuits operation A B C D E F G H I J 2 Copyright Atlas Scientific LLC

13 Available data protocols Default Unavailable data protocols SPI Analog RS-485 Mod Bus 4 20mA 3 Copyright Atlas Scientific LLC

14 UART mode Settings that are retained if power is cut Baud rate Calibration Continuous mode Device name Enable/disable response codes Hardware switch to I 2 C mode LED control Protocol lock Software switch to I 2 C mode Settings that are NOT retained if power is cut Find Sleep mode 0.2

15 UART mode 8 data bits stop bit Baud RX Data in no parity no flow control 300,200 2,400 9,600 default 9,200 38,400 57,600 5,200 TX RX RX TX TX Data out Vcc 3.3V 5.5V TX RX CPU VCC 0V 0V Data format Reading temperature Units C, K, or F Encoding ASCII Format string Terminator carriage return Data type floating point Decimal places 3 Smallest string 4 characters Largest string 399 characters 5 Copyright Atlas Scientific LLC

16 Default state Mode Baud Temperature Readings Speed With probe Without probe LED UART 9,600 C continuous reading per second ttt.ttt on,000 ms Green Standby Cyan Taking reading Transmitting 6 Copyright Atlas Scientific LLC

17 Receiving data from device 2 parts ASCII data string Command Carriage return Terminator 9,600 baud (default) TX RX CPU Receiver Sender Advanced ASCII: Hex: E D Dec: Copyright Atlas Scientific LLC

18 Sending commands to device 2 parts Command (not case sensitive) ASCII data string Carriage return Terminator TX RX CPU Sleep Sender Receiver Advanced ASCII: S l e e p Hex: 53 6C D Dec: Copyright Atlas Scientific LLC

19 LED color definition Green UART standby Cyan Taking reading Purple Changing baud rate Red Command not understood White Find 5V LED ON +0.4 ma 3.3V +0.2 ma 9 Copyright Atlas Scientific LLC r 0.2

20 UART mode command quick reference All commands are ASCII strings or single ASCII characters. Command Function Default state Baud change baud rate pg. 36 9,600 C enable/disable continuous reading pg. 23 enabled Cal performs calibration pg. 25 n/a D enable/disable data logger pg. 28 disabled Export/import export/import calibration pg. 26 n/a Factory enable factory reset pg. 38 n/a Find finds device with blinking white LED pg. 22 n/a i device information pg. 32 n/a I2C change to I 2 C mode pg. 39 not set L enable/disable LED pg. 2 enabled M memory recall/clear pg. 29 n/a Name set/show name of device pg. 3 not set Plock enable/disable protocol lock pg. 37 disabled R returns a single reading pg. 24 n/a S temperature scale ( C, K, F) pg. 27 celsius Sleep enter sleep mode/low power pg. 35 n/a Status retrieve status information pg. 34 n/a *OK enable/disable response codes pg. 33 enable 20 Copyright Atlas Scientific LLC

21 LED control L, L,0 LED off L,? LED on default LED state on/off? L, *OK L,0 *OK L,??L, or?l,0 *OK L, L,0 2 Copyright Atlas Scientific LLC

22 Find This command will disable continuous mode Send any character or command to terminate find. Find LED rapidly blinks white, used to help find device* *This command is only available for firmware version 2.0 and above. Find *OK 22 Copyright Atlas Scientific LLC

23 Continuous reading mode C, C,n C,0 disable continuous readings C,? enable continuous readings once per second default continuous readings every n seconds (n = 2 to 99 sec)* continuous reading mode on/off? *This command is only available for firmware version 2.0 and above. C, *OK C ( sec) C (2 sec) C (n sec) C,30 *OK C (30 sec) C (60 sec) C (90 sec) C,0 *OK C,??C, or?c,0 or?c,30 *OK 23 Copyright Atlas Scientific LLC r 0.2

24 Single reading mode R takes single reading R *OK,000 ms Green Standby Cyan Taking reading Transmitting 600 ms 24 Copyright Atlas Scientific LLC

25 Calibration The EZO TM RTD circuit uses single point calibration. Cal,t Cal,clear Cal,? t = any temperature delete calibration data device calibrated? Cal,00.00 *OK Cal,clear *OK Cal,??Cal, *OK or?cal,0 Cal, C C 25 Copyright Atlas Scientific LLC

26 Export/import calibration Export: Use this command to save calibration settings Import: Use this command to load calibration settings to one or more devices. Export Import Export,? export calibration string from calibrated device* import calibration string to new device* calibration string info* *This command is only available for firmware version 2.0 and above. Export,? 0,20 breakdown 0, 20 # of strings to export # of bytes to export Export strings can be up to 2 characters long, and is always followed by Export Export (7 more) Export Export 59 6F ( of 0) F 6F 6C *DONE (2 of 0) (0 of 0) Disabling *OK simplifies this process Import, n (FIFO) Import, 59 6F ( of 0) 26 Copyright Atlas Scientific LLC

27 Temperature scale ( C, K, F) S,c S,k S,f S,? celsius default kelvin fahrenheit temperature scale? S,c *OK S,k *OK S,f *OK S,??S,c or?s,k or?s,f *OK -26 C,254 C (celsius) 47.5 K,527.5 K (kelvin) F 2,289.2 F (fahrenheit) 27 Copyright Atlas Scientific LLC

28 Enable/disable data logger The time period (n) is in 0 second intervals and can be any value from to 32,000. D,n D,0 disable D,? n = (n x 0 seconds) default data logger storage interval? D,6 *OK D,0 *OK D,??D,6 *OK D,6 60 seconds * * indicates reading has been logged 28 Copyright Atlas Scientific LLC

29 Memory recall Disable data logger to recall memory. M M,all M,? recall sequential stored reading recall all readings in a CSV string display memory location of last stored reading M, ,04.00 *OK M,all 00.00,04.00,08.00,2.00 Oldest Newest M,??M,4 *OK Copyright Atlas Scientific LLC

30 25 25 Memory clear M,clear clear all stored memory M,clear *OK M,clear Copyright Atlas Scientific LLC

31 Naming device Name,n Name,? set name show name n = Up to 6 ASCII characters Name,zzt *OK Name,??Name,zzt *OK Name,zzt Name,? *OK Name,zzt *OK 3 Copyright Atlas Scientific LLC

32 Device information i device information i?i,rtd,2.0 *OK breakdown?i, RTD, 2.0 Device Firmware 32 Copyright Atlas Scientific LLC

33 codes *OK, *OK,0 *OK,? enable response disable response response on/off? default R *OK *OK,0 no response, *OK disabled R *OK disabled *OK,??*OK, or?*ok,0 Other response codes *ER *OV *UV *RS *RE *SL *WA unknown command over volt (VCC>=5.5V) under volt (VCC<=3.V) reset boot up complete, ready entering sleep mode wake up These response codes cannot be disabled 33 Copyright Atlas Scientific LLC

34 Reading device status Status voltage at Vcc pin and reason for last restart Status?Status,P,5.038 *OK breakdown?status, P, Reason for restart Voltage at Vcc Restart codes P powered off S software reset B brown out W watchdog U unknown 34 Copyright Atlas Scientific LLC

35 Sleep mode/low power Send any character or command to awaken device. Sleep enter sleep mode/low power Sleep *SL Any command *WA wakes up device 5V STANDBY SLEEP 5.40 ma 0.4 ma 3.3V 3.80 ma 0.09 ma Sleep Standby 5.40 ma Sleep 3.00 ma 35 Copyright Atlas Scientific LLC

36 Change baud rate TX RX RX TX Baud,n change baud rate TX RX CPU Baud,38400 *OK Baud,??Baud,38400 *OK n = default Baud,38400 (reboot) Standby reen T standby Cyan Taking reading Changing baud rate Purple Changing *OK baud rate Red Command not understood Standby White Find 36 Copyright Atlas Scientific LLC

37 Protocol lock Locks device to UART mode. Plock, Plock,0 Plock,? enable Plock disable Plock Plock on/off? default Plock, *OK Plock,0 *OK Plock,??Plock, or?plock,0 Plock, I2C,00 Short *OK cannot change to I 2 C *ER cannot change to I 2 C 37 Copyright Atlas Scientific LLC Short

38 Factory reset Clears calibration LED on "*OK" enabled Clears data logger Factory enable factory reset Factory *OK Factory (reboot) *OK *RS *RE Baud rate will not change 38 Copyright Atlas Scientific LLC

39 Change to I 2 C mode Default I 2 C address 02 (0x66) I2C,n sets I 2 C address and reboots into I 2 C mode n = any number 27 I2C,00 *OK (reboot in I 2 C mode) Wrong example I2C,39 n > 27 *ER I2C,00 (reboot) Green *OK Blue now in I 2 C mode 39 Copyright Atlas Scientific LLC r 0.2

40 Manual switching to I 2 C Make sure Plock is set to 0 Disconnect ground (power off) Disconnect TX and RX Connect TX to PRB Confirm RX is disconnected Connect ground (power on) Wait for LED to change from Green to Blue Disconnect ground (power off) Reconnect all data and power Connecting TX to PRB only works for the EZO RTD Temperature circuit. Manually switching to I 2 C will set the I 2 C address to 02 (0x66) Short Wrong Short Disconnect RX line 40 Copyright Atlas Scientific LLC

41 I 2 C mode The I 2 C protocol is considerably more complex than the UART (RS 232) protocol. Atlas Scientific assumes the embedded systems engineer understands this protocol. To set your EZO TM device into I 2 C mode click here Settings that are retained if power is cut Calibration Change I 2 C address Hardware switch to UART mode LED control Protocol lock Software switch to UART mode Settings that are NOT retained if power is cut Find Sleep mode r 0.2

42 I 2 C mode I 2 C address (0x0 0x7F) 02 (0x66) default Vcc 3.3V 5.5V Clock speed khz VCC 4.7k resistor may be needed VCC VCC 0V 0V CPU Data format Reading temperature Units C, K, or F Encoding ASCII Format string Data type floating point Decimal places 3 Smallest string 4 characters Largest string 4 characters 42 Copyright Atlas Scientific LLC

43 Sending commands to device 5 parts Start I 2 C address Write Command (not case sensitive) Stop 20 (0x66) ASCII command string Start 02 (0x66) Write Sleep Stop I 2 C address Command CPU Advanced Address bits The entire command as ASCII with all arguments A6 A5 A4 A3 A2 A A0 W ACK First letter of command ACK Last letter of command ACK Start W = low Stop 43 Copyright Atlas Scientific LLC

44 Requesting data from device 7 parts Start I 2 C address Read code Data string Null Stop 02 (0x66) byte "25.04" Terminator (Dec 0) CPU Advanced Address bits N bytes of data All bytes after data are Null R = High A6 A0 R ACK code ACK Data ACK Data N ACK Null ACK Null Start NACK Stop Dec Dec ASCII = Copyright Atlas Scientific LLC

45 codes After a command has been issued, a byte response code can be read in order to confirm that the command was processed successfully. Reading back the response code is completely optional, and is not required for normal operation. Send command CPU Processing delay Receiving data I2C_start; I2C_address; I2C_write(EZO_command); I2C_stop; delay(300); I2C_start; I2C_address; Char[ ] = I2C_read; I2C_stop; Processing delay If there is no processing delay or the processing delay is too short, the response code will always be 254. codes Single byte, not string no data to send still processing, not ready error successful request 45 Copyright Atlas Scientific LLC

46 LED color definition Blue Green Purple Red White I 2 C standby Taking reading 5V LED ON +0.4 ma Changing I 2 C ID# Command not understood Find 3.3V +0.2 ma 46 Copyright Atlas Scientific LLC

47 I 2 C mode command quick reference All commands are ASCII strings or single ASCII characters. Command Baud Cal D Function switch back to UART mode performs calibration enable/disable data logger pg. 63 pg. 5 pg. 54 Export/import export/import calibration pg. 52 Factory Find i I2C L M Plock R S Sleep Status enable factory reset finds devices with white blinking LED device information change I 2 C address enable/disable LED memory recall/clear enable/disable protocol lock returns a single reading temperature scale ( C, K, F) enter sleep mode/low power retrieve status information pg. 62 pg. 49 pg. 57 pg. 6 pg. 48 pg. 55 pg. 60 pg. 50 pg. 53 pg. 59 pg Copyright Atlas Scientific LLC

48 LED control L, LED on default L,0 LED off L,? LED state on/off? 300ms processing delay L, Wait 300ms Dec 0 Null L,0 Wait 300ms Dec 0 Null L,? Wait 300ms?L, 0 Dec ASCII Null or?l,0 0 Dec ASCII Null L, L,0 48 Copyright Atlas Scientific LLC

49 Find 300ms processing delay This command will disable continuous mode Send any character or command to terminate find. Find LED rapidly blinks white, used to help find device* *This command is only available for firmware version 2.0 and above. Find Wait 300ms Dec 0 Null 49 Copyright Atlas Scientific LLC

50 Taking reading 600ms processing delay R return reading R Wait 600ms Dec ASCII 0 Null Green Taking reading Wait 600ms Transmitting Blue Standby 50 Copyright Atlas Scientific LLC

51 Calibration 600ms processing delay Cal,t Cal,clear Cal,? t = any temperature delete calibration data device calibrated? EZO TM RTD circuit uses single point calibration. Cal,t Wait 600ms Dec 0 Null Cal,clear Wait 300ms Dec 0 Null Cal,? Wait 300ms?Cal, Dec ASCII 0 Null or Dec?Cal,0 ASCII 0 Null Cal, C C 5 Copyright Atlas Scientific LLC

52 Export/import calibration Export: Use this command to save calibration settings Import: Use this command to load calibration settings to one or more devices. Export Import Export,? export calibration string from calibrated device* import calibration string to new device* calibration string info* 300ms processing delay *This command is only available for firmware version 2.0 and above. Export,? Wait 300ms Dec 0,20 ASCII 0 Null breakdown 0, 20 # of strings to export # of bytes to export Export strings can be up to 2 characters long Export Wait 300ms Dec 59 6F ASCII 0 Null ( of 0) (8 more) Export Wait 300ms Dec F ASCII 0 Null (0 of 0) Export Wait 300ms Dec *DONE ASCII 0 Null Import, n (FIFO) Import, 59 6F ASCII ( of 0) 52 Copyright Atlas Scientific LLC

53 Temperature scale ( C, K, F) 300ms processing delay S,c S,k S,f S,? celsius default kelvin fahrenheit temperature scale? S,c Wait 300ms Dec 0 Null S,k Wait 300ms Dec 0 Null S,f Wait 300ms Dec 0 Null S,? Wait 300ms Dec?S,f ASCII 0 Null or Dec?S,k ASCII 0 Null or Dec?S,k ASCII 0 Null -26 C,254 C (celsius) 47.5 K,527.5 K (kelvin) F 2,289.2 F (fahrenheit) 53 Copyright Atlas Scientific LLC

54 Enable/disable data logger 300ms processing delay D,n n = (n x 0 seconds) D,0 disable D,? data logger storage interval? The time period (n) is in 0 second intervals and can 300ms be any value Processing from to delay 32,000. D,6 Wait 300ms Dec 0 Null D,0 Wait 300ms Dec 0 Null D,? Wait 300ms Dec?D,6 ASCII 0 Null D,6 (after 60 seconds) Blue Green Purple I 2 C standby 54 Copyright Atlas Scientific LLC Taking reading Changing C

55 Memory recall Disable data logger to recall memory. 300ms processing delay M M,? recall sequential stored reading display memory location of last stored reading M Wait 300ms Dec,00.00 ASCII 0 Null M,? Wait 300ms Dec 4,2.00 ASCII 0 Null Copyright Atlas Scientific LLC

56 25 25 Memory clear 300ms processing delay M,clear clear all stored memory M,clear Wait 300ms Dec 0 Null M,clear Copyright Atlas Scientific LLC

57 Device information 300ms processing delay i device information i Wait 300ms Dec?i,RTD,2.0 ASCII 0 Null breakdown?i, RTD, Device 2.0 Firmware 57 Copyright Atlas Scientific LLC

58 Reading device status 300ms processing delay Status voltage at Vcc pin and reason for last restart Status Wait 300ms Dec?Status,P,5.038 ASCII 0 Null breakdown?status, P, Reason for restart Voltage at Vcc Restart codes P powered off S software reset B brown out W watchdog U unknown 58 Copyright Atlas Scientific LLC

59 Sleep mode/low power Sleep enter sleep mode/low power Send any character or command to awaken device. Sleep no response Do not read status byte after issuing sleep command. Any command wakes up device 5V STANDBY SLEEP 5.40 ma 0.4 ma 3.3V 3.80 ma 0.09 ma Sleep Standby Sleep 59 Copyright Atlas Scientific LLC

60 Protocol lock 300ms processing delay Plock, Plock,0 enable Plock disable Plock default Locks device to I 2 C mode. Plock,? Plock on/off? Plock, Wait 300ms Dec 0 Null Plock,0 Wait 300ms Dec 0 Null Plock,? Wait 300ms Dec?Plock, ASCII 0 Null Plock, Serial, 9600 Short cannot change to UART cannot change to UART 60 Copyright Atlas Scientific LLC

61 I 2 C address change 300ms processing delay I2C,n sets I 2 C address and reboots into I 2 C mode I2C,00 device reboot Warning! Changing the I 2 C address will prevent communication between the circuit and the CPU, until the CPU is updated with the new I 2 C address. n = any number 27 Default I 2 C address is 02 (0x66). I2C,00 (reboot) 6 Copyright Atlas Scientific LLC r 0.2

62 Factory reset Factory reset will not take the device out of I 2 C mode. Factory enable factory reset I 2 C address will not change Factory device reboot Clears calibration LED on codes enabled Clears data logger Factory (reboot) 62 Copyright Atlas Scientific LLC

63 Change to UART mode TX RX Baud,n switch from I 2 C to UART CPU Baud,9600 reboot in UART mode n = S Serial,9600 (reboot) Blue Green Changing to UART mode Purple Red Wh I 2 C standby Taking reading Changing I 2 C ID# Command not understood Fi 63 Copyright Atlas Scientific LLC

64 Manual switching to UART Make sure Plock is set to 0 Disconnect ground (power off) Disconnect TX and RX Connect TX to PRB Confirm RX is disconnected Connect ground (power on) Wait for LED to change from Blue to Green Disconnect ground (power off) Reconnect all data and power Connecting TX to PRB only works for the EZO RTD Temperature circuit. Short Wrong Short Disconnect RX line 64 Copyright Atlas Scientific LLC

65 EZO TM circuit footprint 7.78mm (0.7 ) 2.54mm (0. ) In your CAD software place an 8 position header. 2 Place a 3 position header at both top and bottom of the 8 position. 3 Delete the 8 position header. The two 3 position headers are now 7.78mm (0.7 ) apart from each other. 7.78mm (0.7 ) 65 Copyright Atlas Scientific LLC

66 Datasheet change log Datasheet V 2.6 Updated calibration processing delay time on pg.5 Datasheet V 2.5 Revised Plock pages to show default value. Datasheet V 2.4 Added new commands: "Find" pages 22 & 49. "Export/Import calibration" pages 26 & 52. Added new feature to continous mode "C,n" pg 23. Datasheet V 2.3 Added manual switching to UART information on pg. 59 Datasheet V 2.2 Revised Baud command information on pg 33. Datasheet V 2. Revised entire datasheet 66 Copyright Atlas Scientific LLC

67 Firmware updates V.02 Plock (March 3, 206) Added protocol lock feature Plock V.03 EEPROM (April 26, 206) Fixed glitch where EEPROM would get erased if the circuit lost power 900ms into startup V. Glitch Fix (June 9, 206) Fixed glitch where a blank name would result in garbage ouput V2.0 Update (January, 207) Replaced command response with *OK Replaced command Serial with Baud V2.02 Glitch Fix (February 6, 207) Fixed glitch where calibration would not accept floating point numbers. V2.0 (May 9, 207) Added "Find" command. Added "Export/import" command. Modified continuous mode to be able to send readings every "n" seconds. Sleep current is lowered. 67 Copyright Atlas Scientific LLC

68 Warranty Atlas Scientific Warranties the EZO class RTD circuit to be free of defect during the debugging phase of device implementation, or 30 days after receiving the EZO class RTD circuit (which ever comes first). The debugging phase The debugging phase as defined by Atlas Scientific is the time period when the EZO class RTD circuit is inserted into a bread board, or shield. If the EZO class RTD circuit is being debugged in a bread board, the bread board must be devoid of other components. If the EZO class RTD circuit is being connected to a microcontroller, the microcontroller must be running code that has been designed to drive the EZO class RTD circuit exclusively and output the EZO class RTD circuit data as a serial string. It is important for the embedded systems engineer to keep in mind that the following activities will void the EZO class RTD circuit warranty: Soldering any part of the EZO class RTD circuit. Running any code, that does not exclusively drive the EZO class RTD circuit and output its data in a serial string. Embedding the EZO class RTD circuit into a custom made device. Removing any potting compound. 68 Copyright Atlas Scientific LLC

69 Reasoning behind this warranty Because Atlas Scientific does not sell consumer electronics; once the device has been embedded into a custom made system, Atlas Scientific cannot possibly warranty the EZO class RTD circuit, against the thousands of possible variables that may cause the EZO class RTD circuit to no longer function properly. Please keep this in mind:. All Atlas Scientific devices have been designed to be embedded into a custom made system by you, the embedded systems engineer. 2. All Atlas Scientific devices have been designed to run indefinitely without failure in the field. 3. All Atlas Scientific devices can be soldered into place, however you do so at your own risk. Atlas Scientific is simply stating that once the device is being used in your application, Atlas Scientific can no longer take responsibility for the EZO class RTD circuits continued operation. This is because that would be equivalent to Atlas Scientific taking responsibility over the correct operation of your entire device. 69 Copyright Atlas Scientific LLC