Instruction/ maintenance manual of the product OXYMITH TRANSMITTER F200060 Marathon
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Marathon Sens ors Inc. Oxymit ™ Tran smitter Operators Manua l.
F200060 Revision: 00 04/18/2001 01 04/23/2001 02 05/08/2001 03 09/19/2001 04 11/01/2001 05 11/21/2001 06 04/19/2002 07 10/30/2002 08 11/13/2002 09 11/06/2003 10 12/03/2003 11 09/30/2004 12 04/04/2005 13 04/11/2005 14 11/14/2006 COPYRIGHT © 2004 MARATHON SENSORS INC.
Table of Contents GENERAL DESCRIPTION ................................ ................................ ................................ ............................ 2 SAFETY SUMMARY ................................ ................................ ..
Page 1 of 23 11/14/200 6 Rev. 14 NOTE: Please specify the following parameters when ordering a transmitter; process type, process range (%, ppm), thermocouple type, temperature scale F/C, analog output 1 process and scale, analog output 2 process and scale.
Page 2 of 23 11/14/200 6 Rev. 14 General Descr iption The Oxymit ™ Transmitter has been designed to work as an analog or digital interface for any zirconia based oxygen probe used to track dew point, carbon potential, or oxygen.
Page 3 of 23 11/14/200 6 Rev. 14 Safety Summ ary All cautions and instructions that appear in this manual must be complied with to prevent personnel injury or damage to the Probe T ransmitter or connected equipment. The specified limits of this equipment must not be ex ceeded.
Page 4 of 23 11/14/200 6 Rev. 14 The next figure shows a schematic represent ation of the Probe Transmitter and t ypica l connections required in the field.
Page 5 of 23 11/14/200 6 Rev. 14 Table 1 Process Pa rameters Parameter Name Selection Default Units or Option s Range PROCESS TYPE %O2 CARBON, DPT, %O2, MV CARB PROC FACT 150 0 to 1000 DEWPT PROC FACT.
Page 6 of 23 11/14/200 6 Rev. 14 Oxygen Exponent The range of ox y gen is factor y configured using the oxygen exponent number. Percent oxygen is the standard setting where the oxygen exponent is set to 2 and the output range is 0.00% to 20.9%. For a part per million ( ppm) range the exponent would be set to 6 and the output range of 0.
Page 7 of 23 11/14/200 6 Rev. 14 Table 2 Analog Outputs Parameter Name Oxygen Default Possible Options Possible Ranges OUTPUT 1 MODE O2 0–20.9% 4-20mA O2, CARBON, DEWPT, TEMP, LIN, PROG O2 = 0 – 9999 %C = 0.
Page 8 of 23 11/14/200 6 Rev. 14 Process Variable Calcu lations The transmitter has a selectable process cal culation for percent carbon, percent ox yge n, or dewpoint. The followin g equations are used to derive these values; Percent Oxygen 20.95 %O2 = -------------------- --- e (E/0.
Page 9 of 23 11/14/200 6 Rev. 14 Communications The Transmitter is capable of digital communications usin g the Modbus protocol. Thi s is possible by connecting to the half duplex RS-485 terminals using a shielded twisted pair.
Page 10 of 23 11/14/200 6 Rev. 14 byte received will be an address. The follow command messa ge structure is used, where T is the required character delay.
Page 11 of 23 11/14/200 6 Rev. 14 The following is an example of a fun ction 03 call for dat a at memory location 03. The value returned by the instrument is t he hex value 1E.
Page 12 of 23 11/14/200 6 Rev. 14 Memory Map NOTE: Modbus refers to the he xadecimal register location. These parameters are formatted as unsigned 16 bit integers. An y real number suc h as temperature can be evaluated as a signed number , other parameters are bit mapped words that must be evaluated as single bits are bit groups.
Page 13 of 23 11/14/200 6 Rev. 14 BLOCK 0 HEX DEC PARAMETER DESCRIPTION READ/W RITE DEFAULT = 150 05 5 EVENT LDLN LOW BYT E – INPUT EVENT CONFIGURAT ION Bits 0 – 3 0000 = None 0001 = Auto Mode Sel.
Page 14 of 23 11/14/200 6 Rev. 14 BLOCK 0 HEX DEC PARAMETER DESCRIPTION READ/W RITE BITS 0 - 4 OXYGEN E XPONENT RANGE = 0 to 31, where 2 = % and 6 = ppm DEFAULT = 2 BITS 5 - 6 DISPL A Y DECIM A L PL ACE where: 0 = no decimal point in di spla y 1 = Display X XX.
Page 15 of 23 11/14/200 6 Rev. 14 BLOCK 0 HEX DEC PARAMETER DESCRIPTION READ/W RITE HIGH BYT E, ANALOG OUTPUT 2 BITS 8 – 12 0000 = N/A 0001 = Tem perature 0010 = Linear I nput A 0011 = Carbon value .
Page 16 of 23 11/14/200 6 Rev. 14 BLOCK 0 HEX DEC PARAMETER DESCRIPTION READ/W RITE source value is b ased on the s election in ASRC upper b yte where 14 20 SPAR E SPARE READ/W RITE 15 21 SPAR E SPARE READ/W RITE 16 22 SPAR E SPARE READ/W RITE 17 23 T EMPFIL Temperature Inpu t Filter in seco nds Range = 0 t o 3276.
Page 17 of 23 11/14/200 6 Rev. 14 BLOCK 1 HEX DEC PARAMETER DESCRIPTION READ/W RITE 22 20 DACV2 ANALO G OUTPUT 2 0 to 4095 is 4 to 20 m a In dual m ode 4mA = - 100, 12m A = 0, 20mA = +100 READ/W RITE .
Page 18 of 23 11/14/200 6 Rev. 14 Operational Spe cifications Power input 21.6 to 26.4 volts DC / 1 30mA Thermocouple input Thermocouple type Zero ºF Span ºF B 800 3000 C 32 3000 E 32 1300 J 32 1300.
Page 19 of 23 11/14/200 6 Rev. 14 Thermocouple Null Thermocouple Span Cold Junction Trim Communications port RS-485 Half Duplex Only Protocol Modbus RTU Baud rates 1200, 2400, 4800, 9600, 19.
Page 20 of 23 11/14/200 6 Rev. 14 Fast Transients EN 61000-4-4 Level 4: 2 kV I/O Level 3: 2 kV power RF conducted interference EN 61000-4-6 Level 3: 10 V/ rms 150 KHz – 80 MHz Emissions as specified.
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