Marathon F200060 User Manual

Marathon Sensors Inc.

Oxymit™ Transmitter

Operators Manual

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.
3100 East Kemper Road, Cincinnati, Ohio 45241
1-800-547-1055 [phone] FAX: [phone]

All trademarks used in this publication are duly marked and the sole property of their
respective owners. No attempt at trademark or copyright infringement is intended or
implied.

Marathon Sensors makes no warranties express or implied beyond the written warranty
presented at initial purchase. Marathon Sensors Inc. is not responsible for any product,

process, damage or injury incurred while using this equipment. Marathon Sensors makes
no representations or warranties with respect to the contents hereof and specifically
disclaims any warranties of merchantability or fitness for any particular application or
purpose.

Table of Contents

GENERAL DESCRIPTION............................................................................................................................ 2

SAFETY SUMMARY......................................................................................................................................3

CONNECTIONS..............................................................................................................................................3

GROUNDING AND SHIELDING .........................................................................................................................4

PARAMETER SELECTIONS........................................................................................................................4

PROCESSPARAMETERS...................................................................................................................................4

Process Type.............................................................................................................................................5

Carbon Process Factor.............................................................................................................................5

Dew Point Process Factor........................................................................................................................ 5

Oxygen Exponent......................................................................................................................................6

TC Type.....................................................................................................................................................6

ANALOG OUTPUT CHANNELS .........................................................................................................................6

CALIBRATION...............................................................................................................................................7

PROCESS VARIABLE CALCULATIONS...................................................................................................8

PERCENTOXYGEN.......................................................................................................................................... 8

PERCENTCARBON..........................................................................................................................................8

DEWPOINT...................................................................................................................................................... 8

COMMUNICATIONS.....................................................................................................................................9

MODBUS.........................................................................................................................................................9

RTU Framing............................................................................................................................................ 9

Address Field.......................................................................................................................................... 10

Function Field......................................................................................................................................... 10

Data Field...............................................................................................................................................10

Error Check Field (CRC)........................................................................................................................10

MEMORY MAP.............................................................................................................................................12

OPERATIONAL SPECIFICATIONS..........................................................................................................18

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.

Typical Oxygen Transmitter Calibration

(F840030)

Calibration
Function

Measured Value or
Input

Output / Units

Cold Junction Room Temp °F
Thermocouple

min
Thermocouple

max

800°F (B type)
standard t/c type

3000°F (B type)
standard t/c type

°F

°F

Millivolt 0.0 mV Millivolts
Millivolt 2000 mV Millivolts
Analog 1 Zero 0% O2 4.0 mA +/- 0.1

Analog 1 Span 20.9% O2 20.0 mA +/- 0.1
Analog 2 Zero 800°F +/- 5° 4.0 mA +/- 0.1
Analog 2 Span 3000°F +/- 5° 20.0 mA +/- 0.1

Typical Carbon Transmitter Calibration

(F840031)

Calibration
Function

Measured Value or
Input

Output / Units

Cold Junction Room Temp °F
Thermocouple
Min
Thermocouple
Max

MUST BE
SPECIFIED
MUST BE
SPECIFIED

°F

°F

Millivolt 0.0 mV Millivolts
Millivolt 2000 mV Millivolts

Analog 1 Zero 0% Carbon 4.0 mA +/- 0.1
Analog 1 Span 2.55% Carbon 20.0 mA +/- 0.1
Analog 2 Zero MUST BE

4.0 mA +/- 0.1

SPECIFIED

Analog 2 Span MUST BE

20.0 mA +/- 0.1

SPECIFIED

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General Description

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. The
transmitter connects to the temperature and millivolts outputs of an oxygen probe and can
produce analog outputs proportional to the selected process value.

The features available are:

 Isolated inputs for thermocouple and probe millivolt
 24 bit Sigma-Delta ADC for inputs.

 SerialEEPROM to store setup and calibration values.
 Two isolated self-powered 4-20mA outputs for process value and temperature.

The transmitter makes a carbon or oxygen probe an intelligent stand alone sensor. The
transmitter is located near the probe, preferably mounted in an enclosure. The transmitter
mounts onto a DIN rail and requires a 24VDC power supply. It measures the probe
temperature and millivolts. At the time of order the transmitter can be configured to

calculate percent carbon, dewpoint, or percent oxygen from these inputs. The results of
any of these calculations are made available via two4-20mA loop outputs. Typically one
first loop is set up for the process value the second loop transmits probe temperature.

T/C INPUT

mV INPUT

+24V

24V

COM

12

11

6

5

8

7

5V_A

44M

EVENT INPUT

Power

Supplies

22M

A/D

CONV.

5V_A
5V_B

+15V

-15V
+15V

-15V

EEPROM

Process

Controller

3

4

Figure 1 BLOCK DIAGRAM

5V_A

5V_A

DISPLAY

CONN.

5V_A

10

5V_B

A

RS485

B

ISOLATED

RTX+

9

RTX-

ISOLATED

-15V

+15V

1

ANALOG

OUT 1

4-20mA

2

D/A

C

C C

ISOLATED

-15V

+15V

14

ANALOG

OUT 2

4-20mA

13

D/A

D

D D

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Safety Summary

All cautions and instructions that appear in this manual must be complied with to prevent
personnel injury or damage to the Probe Transmitter or connected equipment. The
specified limits of this equipment must not be exceeded. If these limits are exceeded or if
this instrument is used in a manner not intended by Marathon Sensors Inc., damage to this

instrument or connected devices could occur.

Do not connect this device directly to AC motors, valves, or other actuators. All AC alarm
functions must be connected through an interposing DC coil relay with a maximum coil
load of 0.5 amps DC. The Probe Transmitter is not rated to act as a safety device. It

should not be used to provide interlocking safety functions for any temperature or process
functions. Alarm capabilities are provided for probe test and input faults only and are not
to be considered or used as safety contacts in any application.

Connections

The Probe Transmitter has four removable terminal blocks grouped with four terminals
each. Each terminal is a wire clamp type with a standard slot screw. Each clamp can
accommodate AWG 24 to 12 flexible stranded wire. Maximum torque on the terminal

screws should not exceed 0.8 Nm.

The figure below shows the arrangement of the terminals.

1 2 3 4

- + EVT EVT
AO1 COM NO

LOWER

5 6 7 8

- + - +

TC MV

UPPER

UPPER

9 10 11 12

- + - +

RS485 24VDC

LOWER

13 14 15 16

- + N/C N/C
AO2

Figure 2 Terminal Layout

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The next figure shows a schematic representation of the Probe Transmitter and typical
connections required in the field.

Figure 3 Schematic Connections

Grounding and Shielding

To minimize the pick-up of electrical noise, the low voltage DC connections and the sensor
input wiring should be routed away from high-current power cables. Where it is

impractical to do this, use shielded cables with the shield grounded at the Probe Transmitter
enclosure ground as show above.

Parameter Selections

The following tables list the parameters available in the Probe Transmitter. Default values
are also listed. The default values are loaded if a reset is force in the device. Changes to

these parameters must be specified at the time of order.

Process Parameters

The following table shows the process selections and other parameters that effect the
process value.

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Table 1 Process Parameters

Parameter Name Selection

Units or Options Range

Default

PROCESS TYPE %O2 CARBON, DPT,

%O2, MV

CARB PROC FACT 150 0 to 1000
DEWPT PROC FACT 150 0 to 1000
OXYGEN EXPON 0002 POWER OF TEN 0 to 31

TC TYPE B B, C, E, J, K, N,

NNM, R, S, T

Process Type

Selecting the process type determines what type of calculation the Smart Transmitter is
going to do based on the probe millivolt and probe temperature inputs. The default process
value for the Smart Transmitter is %O2 with an exponent selection of 2. This is the
selection most often used in Boiler control and Combustion applications.

Percent Carbon and dew point are typically processes that are used in steel treating
applications. Percent Carbon is the process value most often used for the control of case
depth or the percent of carbon in asteel hardening furnace. Dew Point is used in the control
for endothermic generators.

Carbon Process Factor

The carbon process factor can be used to adjust the % carbon value. This number takes
into account a number of assumptions that the carbon value is based on. Primary among

these is the assumed level of CO in the atmosphere. See the Theory of Process Calculation
section for a complete explanation of this value.

It maybe necessary to change the apparent furnace carbon as measured by the oxygen
probe if this value is different than actual load samples, shim stocks, or gas analysis. The

basic rule of thumb is that an increase is the carbon process factor will decrease the
apparent carbon level in the furnace. The default value is 150. Typical values can very
from 50 to 400. Increase or decrease the process factor until the desired carbon level is
achieved. A process factor that is drastically different than normal may be an indication of
a failing probe, water or air leak in the furnace, or excess methane present. Refer to probe

troubleshooting guides to determine what other factors maybe effecting the carbon value.

Dew Point Process Factor

The dew point process factor is similar to the carbon process factor but is used to adjust the
dew point value if dew point is selected as the process value. This number takes into

account a number of assumptions that the dew point value is based on. Primary among
these is the assumed level of hydrogen in the atmosphere. See the Theory of Process
Calculation section for a complete explanation of this value.

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Oxygen Exponent

The range of oxygen is factory 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 0.00 X 10-6to 99.99 X 10-6.

TC Type

The following table shows the available thermocouple types and the ranges. BOLD
indicates the typical oxygen default.

Thermocouple

Zero ºF Zero °C Span ºF Span °C

type

B 800 425 3000 1650

C 32 0 3000 1650

E 32 0 1300 700

J 32 0 1300 700

K 32 0 2300 1260
N 32 0 2300 1260

NNM 32 0 2000 1090

R 300 150 3000 1650

S 300 150 3000 1650
T 32 0 700 370

The Cold Junction correction is applied to all thermocouple types.

Analog Output Channels

The analog outputs are factory configured to provide 4 to 20mA signals proportional to
selectable process values.

NOTE

The Analog Output Channels are isolated self-powered
current sources and do not require an external supply.

If a chart recorder is to be used, it should have input specifications within 4 to 20mA. If
the recorder only responds toVDC inputs it will be necessary to add a 250 ohm dropping
resistor across its input terminals.

The ideal location of the recorder is adjacent to the instrument but it may be located
remotely if the connecting wires are properly shielded. For best results, the chart recorder
input(s) should be isolated from ground.

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Table 2 Analog Outputs

Parameter

Name

OUTPUT 1
MODE

Oxygen

Default

O2

0–20.9%
4-20mA

Possible
Options

O2, CARBON,
DEWPT, TEMP, LIN,

PROG

Possible

Ranges

O2 = 0 – 9999
%C = 0.00 – 2.55

DP = -99.9 – 212.0
Temp = -999 – 3000
LIN = -999 – 9999

PROG = 0 – 4095
OUTPUT 2
MODE

TEMP

800-3000°F
4-20mA

O2, CARBON,
DEWPT, TEMP, LIN,
PROG

O2 = 0 – 9999

%C = 0.00 – 2.55

DP = -99.9 – 212.0

Temp = -999 – 3000

LIN = -999 – 9999

PROG = 0 – 4095

NOTE: SEE PAGE 4 FOR TYPICAL CALIBRATION VALUES.

Calibration

The Smart Transmitter is factory calibrated. The calibration can be verified once a year or
according to customer calibration schedules. The instrument should be returned to the

factory if calibration is required.

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Process Variable Calculations

The transmitter has a selectable process calculation for percent carbon, percent oxygen, or
dewpoint. The following equations are used to derive these values;

Percent Oxygen

20.95

%O2 = -----------------------

(E/0.0215*Tk)

e

Where: E = probe millivolts, Tk = probe temperature in degrees Kelvin.

The 20.95 is the %O2 in air.

Percent Carbon

((E-786)/(0.043102*Tk))

e

%C = 5.102 ---------------------------------------------------

(29*PF + 400)+e((E-786)/(0.043102*Tk))

Where: E = probe millivolts, Tk = probe temperature in Kelvin, and PF is the process
factor.

Dewpoint

4238.7

DP = -------------------------------------------------------------------- - 459.69

6.281216 + log((29*PF+400)+(E-1267.8)/(0.05512*Tr)

Where: E = probe millivolts, Tr = probe temperature in Rankin, PF is the process factor,
and DP is the dewpoint in Fahrenheit.

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Communications

The Transmitter is capable of digital communications using the Modbus protocol. This is
possible by connecting to the half duplex RS-485 terminals using a shielded twisted pair.

Modbus

The MODBUS protocol describes an industrial communications and distributed control
system (DCS) that integrates PLCs computers, terminals, and other monitoring, sensing,
and control devices. MODBUS is a Master/Slave communications protocol, whereby one
device, (the Master), controls all serial activity by selectively polling one or more slave

devices. The protocol provides for one master device and up to 247 slave devices on a RS­485 half duplex twisted pair line. Each device is assigned an address to distinguish it from
all other connected devices. All instruments are connected in a daisy-chain configuration.

The instrument communicates with baud rate settings 1200, 2400, 4800, 9600, or 19.2K.
The default baud rate is 19.2Kbuad. The default address is 1. Changes to these values can

be made by writing to the appropriate memory register.

The Transmitter communicates in Modbus RTU (Remote Terminal Unit) protocol using 8­bit binary data characters. Message characters are transmitted in a continuous stream. The

message stream is setup based on the following structure:

Number of bits per character:
Start bits 1
Data bits (least significant first) 8

Parity None only (no bits for no parity)
Stop bits 1
Error Checking CRC (Cyclical Redundancy Check)

The Transmitter recognizes threeRTU commands. These are: read single I registers
(command 4), read a single H register (command 3), and preset a single H register

(command 6)

In Modbus mode, the Transmitter can be only be configured for the ‘none’ parity option.

The instrument never initiates communications and is always in receive mode unless
responding to a query.

RTU Framing

Frame synchronization can be maintained inRTU transmission mode only by simulating a
synchronous message. The instrument monitors the elapsed time between receipt of
characters. If three and one-half character times elapse without a new character or
completion of the frame, then the instrument flushes the frame and assumes that the next

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byte received will be an address. The follow command message structure is used, where T
is the required character delay. Response from the instrument is based on the command.

T1,T2,T3 ADDRESS FUNCTION DATA CHECKSUM T1,T2,T3

8-BITS 8-BITS N X 8-BITS 16-BITS

Address Field

The address field immediately follows the beginning of the frame and consists of 8-bits.
These bits indicate the user assigned address of the slave device that is to receive the

message sent by the attached master.

Each slave must be assigned a unique address and only the addressed slave will respond to
a query that contains its address. When the slave sends a response, the slave address

informs the master which slave is communicating.

Function Field

The Function Code field tells the addressed slave what function to perform. MODBUS
function codes are specifically designed for interacting with aPLC on the MODBUS

industrial communications system. Command codes were established to manipulate PLC
registers and coils. As far as the Transmitter is concerned, they are all just memory
locations, but the response to each command is consistent with Modbus specifications.

The high order bit in this field is set by the slave device to indicate an exception condition
in the response message. If no exceptions exist, the high-order bit is maintained as zero in
the response message.

Data Field

The data field contains information needed by the slave to perform the specific function or
it contains data collected by the slave in response to a query. This information may be
values, address references, or limits. For example, the function code tells the slave to read
a holding register, and the data field is needed to indicate which register to start at and how

many to read.

Error Check Field (CRC)

This field allows the master and slave devices to check a message for errors in
transmission. Sometimes, because of electrical noise or other interference, a message may

be changed slightly while it is on its way from one device to another. The error checking
assures that the slave or master does not react to messages that have changed during
transmission. This increases the safety and the efficiency of the MODBUS system.

The error check field uses a CRC-16 check in the RTU mode.

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The following is an example of a function 03 call fordata at memory location 03. The
value returned by the instrument is the hex value 1E.

Transmit from Host or Master

Address Cmd RegHIReg

LO

CountHICountLOCRCHICRC

LO

01 03 00 03 00 01 74 0A

Response from Transmitter

Address Cmd Byte

Count
HI

Byte
Count
LO

DataHIData

LO

CRCHICRC

Lo

01 03 00 02 00 1E 38 4C

Note that all the values are interpreted as hexadecimal values. The CRC calculation is
based on the A001 polynomial for RTU Modbus. The function 04 command structure is
similar to the 03 structure.

The following is an example of a function 06 call to change data in register 01 to 200. The
response from the instrument confirms the new value as being set.

Transmit from Host or Master

Address Cmd RegHIRegLODataHIData

LO

CRCHICRC

LO

01 06 00 01 00 C8 D9 9C

Response from Transmitter

Address Cmd RegHIRegLODataHIDataLOCRCHICRC

LO

01 06 00 01 00 C8 D9 9C

The Transmitter will respond to several error conditions. The three exception codes that
will generate a response from the instrument are:

01 – Illegal Function
02 - Illegal Data Address
03 – Illegal Data Value
04 – Slave Device Failure

The response from the Transmitter with an exception code will have the most significant
bit of the requested function set followed by the exception code and the high and lowCRC
bytes.

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Memory Map

NOTE: Modbus refers to the hexadecimal register location. These parameters are
formatted as unsigned 16 bit integers. Any real number such 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.

BLOCK 0

HEX DEC PARAMETER DESCRIPTION READ/WRITE

00 0 Not used READ ONLY
01 1 TIME CONTROL

SIOSET

LOW BYTE - TIMER CONTROL

BIT 0 – Timer Disabled (0), Timer Enabled (1)
BIT 1 – 7 SPARE

HIGH BYTE – SIO SETUP

BITS 8 – 9 PARITY SETTING
00 = Even Parity, 7 bits, 1 Stop bit

01 = No Parity, 8 bits, 1 Stop bit
10 = Odd Parity, 7 bits, 1 Stop bit

BITS 10 – 11 RESPONSE DELAY
0 = No delay applied to response
1 = 10ms delay applied to response

2 = 20ms delay applied to response
3 = 30ms delay applied to response

READ/WRITE

BITS 12 – 14 BAUD SELECT
000 = 76.8K
001 = 38.4K

010 = 19.2K (DEFAULT)
011 = 9600

100 = 4800
101 = 2400

110 = 1200
111 = 600

BIT 15 HOST FORMAT
0 = MSI (PROP)
1 = MODBUS (DEFAULT)

02 2 TC_ZERO

TC_SPAN

03 3 MV_ZERO

MV_SPAN

04 4 PF PROCESS FACTOR FOR CARBON OR

LOW BYTE - TC ZERO CALIBRATION
NUMBER

HIGH BYTE – TC SPAN CALIBRATION
NUMBER
LOW BYTE – MV ZERO CALIBRATION

NUMBER
HIGH BYTE – MV SPAN CALIBRATION

NUMBER

DEWPOINT
RANGE = 0 to 4095

READ/WRITE

READ/WRITE

READ/WRITE

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BLOCK 0

HEX DEC PARAMETER DESCRIPTION READ/WRITE

DEFAULT = 150

05 5 EVENT

LDLN

LOW BYTE – INPUT EVENT

CONFIGURATION
Bits 0 – 3

0000 = None
0001 = Auto Mode Selected

0010 = Remote Setpoint Selected
0011 = Acknowledge alarms

0100 = Timer Hold
0101 = Timer End

0110 = Timer Start
0111 = Start probe test

1000 = Process hold
Bits 4 – 7 not used.

UPPER BYTE – LOAD LINE

READ/WRITE

06 6 CJTRM

HADR

07 7 SPARE SPARE
08 8 CONFIG0 Input Configuration

09 9 CONFIG2 SETUP VALUES

LOW BYTE – COLD JUNCTION TRIM

COLD JUNCTION TRIM (unsigned integer)
RANGE = –128 TO +127 WHERE

1 COUNT = 1 DEG (C or F) and –128 = 65408

HIGH BYTE – HOST ADDRESS

BITS 0-7
RANGE = 0 – 255

BITS 0-3TC Input TYPE

0000 = B (DEFAULT)
0001 = E

0010 = J
0011 = K

0100 = N
0101 = R

0110 = S
0111 = T

1000 = SPARE
1001 = SPARE

1010 = SPARE
1011 = SPARE

1100 = SPARE
1101 = SPARE

1110 = SPARE
1111 = SPARE

BIT 4 = SPARE
BIT 5 0 = NO CJ APPLIED, 1 = CJ APPLIED

BIT 6 0 = °F, 1 = °C
BIT 7 0 = 60HZ FILTER

BIT 8 – 11 Millivolt Input TYPE
0000 = LINEAR (DEFAULT)

All other bit combinations are spare
BITS 12 – 15 are spare

READ/WRITE

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BLOCK 0

HEX DEC PARAMETER DESCRIPTION READ/WRITE

BITS 0 - 4 OXYGEN EXPONENT

RANGE = 0 to 31, where 2 = % and 6 = ppm
DEFAULT = 2

BITS 5 - 6 DISPLAY DECIMAL PLACE

where:
0 = no decimal point in display

1 = DisplayXXX.X
2 = DisplayXX.XX

3 = DisplayX.XXX
DEFAULT = 0

BITS 8 – 12 REDOX METAL NUMBER

RANGE = 0 – 14
DEFAULT = 0

BITS 13 – 15 SPARE

0A 10 FAULT FAULT BIT MAP

BIT 0 = Temperature Input Open
BIT 1 = MV Input Open

BIT 2 = Range of input is low
BIT 3 = Range of input is high

BIT 4 = Timer End
BIT 5 = Probe Care Fault

BITS 6 – 7 = SPARE
BIT 8 = CPU Fault

BIT 9 = Min Idle counter = 0
BIT 10 = Keyboard failure, stuck key or a key

was pressed during power up.
BIT 11 = Flash Erase Failed

BIT 12 = Flash Checksum Failed
BIT 13 = EEPROM Checksum Failed

BIT 14 = Flash/EEPROM Size Fault
BIT 15 = ADC Fault

0B 11 ASRC ANALOG OUT SOURCES

LOW BYTE, ANALOG OUTPUT 1

BITS 0 – 3
0000 = N/A

0001 = Temperature
0010 = Linear Input A

0011 = Carbon value
0100 = Dewpoint value

0101 = Oxygen value
0110 =Redox value

0111 = Output Power
1000 = Control Output 1

1001 = Control Output 2
1010 = Linear Input B

1011 = Programmable*

READ ONLY

READ/WRITE

*For Programmable, write required output
value into DACV1, where DACV1 = 0 is

minimum output and
DACV1 = 4096 is maximum output.

BITS 4 – 7 SPARE

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BLOCK 0

HEX DEC PARAMETER DESCRIPTION READ/WRITE

HIGH BYTE, ANALOG OUTPUT 2

BITS 8 – 12
0000 = N/A

0001 = Temperature
0010 = Linear Input A

0011 = Carbon value
0100 = Dewpoint value

0101 = Oxygen value
0110 =Redox value

0111 = Output Power
1000 = Control Output 1

1001 = Control Output 2
1010 = Linear Input B

1011 = Programmable*
*For Reference Number and Programmable ,

write required output value into DACV2, where
DACV2 = 0 is minimum output and
DACV2 = 4096 is maximum output.

BITS 13 – 15 SPARE
Special case: If Analog Output 1 = CONTROL

OUTPUT 1 and Analog Output 2 = CONTROL
OUTPUT 2 and the Control Mode is dual, then

Analog Output 1 is 4-20ma for 0 to +100% PO
and Analog Output 2 is 4-20ma for 0 to -100%

PO.

0C 12 DAC_OFFSET_1 DAC 1 OFFSET CALIBRATION READ/WRITE
0D 13 DAC_SPAN_1 DAC 1 SPAN CALIBRATION READ/WRITE
0E 14 DAC_OFFSET_2 DAC2 OFFSET CALIBRATION READ/WRITE
0F 15 DAC_SPAN_2 DAC2 SPAN CALIBRATION READ/WRITE

10 16 AOUTOF1 ANALOG OUTPUT 1 OFFSET

Minimum source value that correlates to
minimum Analog Output of 4 mA. The source

value is based on the selection in ASRC lower
byte

11 17 AOUTRN1 ANALOG OUTPUT 1 RANGE

Maximum source value that correlates to
maximum Analog Output of 20 mA. The

source value is based on the selection in
ASRC lower byte where

12 18 AOUTOF2 ANALOG OUTPUT 2 OFFSET

Minimum source value that correlates to
minimum Analog Output of 4 mA. The source

value is based on the selection in ASRC upper
byte

13 19 AOUTRN2 ANALOG OUTPUT 2 RANGE

Maximum source value that correlates to
maximum Analog Output of 20 mA. The

READ/WRITE

READ/WRITE

READ/WRITE

READ/WRITE

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BLOCK 0

HEX DEC PARAMETER DESCRIPTION READ/WRITE

source value is based on the selection in
ASRC upper byte where

14 20 SPARE SPARE READ/WRITE
15 21 SPARE SPARE READ/WRITE
16 22 SPARE SPARE READ/WRITE
17 23 TEMPFIL Temperature Input Filter in seconds

Range = 0 to 3276. The higher the number
the faster the reading update.

DEFAULT = 1000

BLOCK 1

HEX DEC PARAMETER DESCRIPTION READ/WRITE

18 24 MVFIL Millivolt Input Filter in seconds

Range = 0 to 3276. The higher the number
the faster the reading update.

DEFAULT = 1000

19 25 AZERO LINEAR OFFSET, Y INTERCEPT LINEAR

SCALING FOR INPUT A

1A 26 ANUM LINEAR SPAN VALUE FOR INPUT A READ/WRITE
1B 27 BZERO LINEAR OFFSET, Y INTERCEPT LINEAR

SCALING FOR INPUT B
1C 14 BNUM LINEAR SPAN VALUE FOR INPUT B READ/WRITE
1D 15 PROC This value is the calculated process value

shown as an integer. The decimal point and

exponent values are required to determine the

actual scaled value.

Range = -999 to 9999.

For example: If the process = oxygen, display

decimal point = 2, and exponent = 6, and

PROC = 1234, then the actual value and

displayed as 12.34 ppm.
1E 16 COLDJCT COLD JUNCTION

Where 1 COUNT = 1°F (°C), RANGE = -99 TO

255°F (°C). Note this parameter is an

unsigned integer.
1F 17 TEMP MEASURED TEMPERATURE

Where temperature is presented in degrees C

or F, based on the C/F setting. Note this

parameter is an unsigned integer of

temperature -2721 = 62815

Range = max / min range of selected

thermocouple.

20 18 MV MEASURED MILLIVOLT

Where this value is scaled in 0.1 mV

increments, i.e. 10001 = 1000.1.

Range = 0 to 2000 mV.

21 19 DACV1 ANALOG OUTPUT 1

0 to 4095 is 4 to 20 mA In dual mode 4mA = -

100, 12mA = 0, 20mA = +100

READ/WRITE

READ/WRITE

READ/WRITE

READ/WRITE

READ ONLY

READ ONLY

READ ONLY

READ ONLY

READ/WRITE

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BLOCK 1

HEX DEC PARAMETER DESCRIPTION READ/WRITE

22 20 DACV2 ANALOG OUTPUT 2

0 to 4095 is 4 to 20 ma In dual mode 4mA = -

100, 12mA = 0, 20mA = +100

23 35 SPARE SPARE
24 36 SPARE SPARE
25 37 SPARE SPARE
26 38 SPARE SPARE
27 39 SPARE SPARE

28 40 SPARE SPARE

29 41 SPARE SPARE
2A 42 SPARE SPARE
2B 43 SPARE SPARE
2C 44 SPARE SPARE
2D 45 SPARE SPARE
2E 46 SPARE SPARE

2F 47 SPARE SPARE

READ/WRITE

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Operational Specifications

Power input 21.6 to 26.4 volts DC / 130mA

Thermocouple input

Thermocouple type Zero ºF Span ºF

B 800 3000

C 32 3000
E 32 1300

J 32 1300

K 32 2300
N 32 2300

NNM 32 2000

R 300 3000

S 300 3000

T 32 700

Bold shows default

Accuracy after linearization +/- 1 deg F

Millivolt input -200 to 2000 millivolts +/- 0.1 millivolt

Input Impedance 25 Megohm

Cold junction compensation +/- 1 deg F

DC outputs (Isolated) 0 to 20mA (650max).

Isolation 1000V DC/AC

Power input to signal inputs
Power input to communications

No Isolation Thermocouple input to Millivolt input, inputs must be differential.

Calculations Percent carbon 0 – 2.55%, no CO compensation

Dewpoint -99°F (-72.8°C) – 212 °F (100°C), no hydrogen
compensation

Percent oxygen. 0 – 20.9% (default)

CAUTION

DO NOT CONNECT ANY AC SOURCE OR LOAD TO
INSTRUMENT CONTACTS

Calibration Setups Millivolt Null

Millivolt Span

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Thermocouple Null
Thermocouple Span
Cold Junction Trim

Communications port RS-485 Half Duplex Only

Protocol Modbus RTU
Baud rates 1200, 2400, 4800, 9600, 19.2K (19.2K default)
Parity None
Address 1 – 254 (Address 1 is default)

Housing

Material Polyamide PA non-reinforced
Inflammability Evaluation Class V0 (UL94)
Temperature Range -40 to 100°C

Dielectric Strength 600 kV/cm (IEC243-1)
Mounting Snaps on to EN 50022 top hat (T) style DIN rail.

Terminals

Wire clamp screw terminals on four position removable terminal blocks.
Wire Size AWG 24 – 12 flexible stranded, removable terminal blocks.

Max. Torque 0.8 Nm

CAUTION: DO NOT CONNECT OR DISCONNECT HOUSING PLUGS
WHILE MODULE IS POWERED OR UNDER LOAD.

Weight 10 oz

Environmental Conditions

Operating Temperature -20 °C to 55 °C (-4 to 130 F)
Storage Temperature -40 °C to 85 °C (-40 to 185 F)

Operating and Storage Humidity

85% max relative humidity,noncondensing, from –20
to 65°C

Certifications and Compliance (PENDING)

Safety EN 61010-1, IEC 1010-1
Safety requirement for electrical equipment for measurement, control, and
laboratory use, Part 1

Electromagnetic Compatibility

Immunity as specified by EN 50082-2

Electrostatic discharge EN 61000-4-2 Level 3: 8 kV air
Electromagnetic RF fields EN 61000-403 Level 3: 10 V/m

80 MHz – 1 GHz

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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 by EN 50081-2

RF Interference EN 55011 Enclosure class A

Power main class A

Note: This instrument is designed for installation inside a grounded metal enclosure.
Always observe anti-static precautions when installing or servicing any electronic device.

Ground your body to discharge any static field before touching the body or terminals of any
electronic device.

This specification can change without notification.

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