MODEL: 18JF
Rack-mounted DCS Signal Conditioners 18-RACK
POWER INPUT
DC Power
R: 24 V DC
2-input MATH FUNCTION MODULE
(field-programmable)
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
Functions & Features
• Providing temperature or pressure compensation for a gas
flow, and other arithmetic operations
• Microprocessor based
[2] OPTIONS
Equation (Refer to the EQUATION table)
/1: Temperature compensation for DP flowmeter (ideal gas)
/2: Pressure compensation for DP flowmeter (ideal gas)
/3: Addition/subtraction
• Equation and parameters selectable on site via hand-held
programmer PU-2x
• Loop testing
/4: Multiplication
• Second channel output available at the front terminals
and at the Standard Rack connector
/5: Division
EQUATION
Equation parameters
Typical Applications
• Various flowmeters
• Adding two flows
X0: output (%)
X
1
to X
to K
to A
2
: input (%)
• Ratio calculation
K0
2: gain ±29.999
• Calculating average temperature
A0
2: bias (%) ±299.99 %
EQUATION
/1: Temperature compensation for DP flowmeter (ideal gas)
K1X1
X0 =
K2X2+A2
where X0 : compensated flow (linear characteristic)
X1 : uncompensated flow (square root extraction available)
X2 : temperature
/2: Pressure compensation for DP flowmeter (ideal gas)
X0 = K1X1 K2X2+A2
where X0 : compensated flow (linear characteristic)
X1 : uncompensated flow (square root extraction available)
X2 : pressure
MODEL: 18JF–[1]66–R[2]
/3: Addition/subtraction
ORDERING INFORMATION
• Code number: 18JF-[1]66-R[2]
X0 = K0 {K1 (X1+A1) + K2 (X2+A2)} + A0
/4: Multiplication
Specify a code from below for each of [1] and [2].
(e.g. 18JF-666-R/3)
X0 = K0 (K1X1+A1) (K2X2+A2) + A0
/5:Division
Use Ordering Information Sheet (No. ESU-1980). Default
setting will be used if not otherwise specified.
0
K (K1X1+A1)
(K2X2+A2)
X0
=
+ A0
[1] INPUT
Current
RELATED PRODUCTS
• Programming Unit (model: PU-2x)
A: 4 – 20 mA DC (Input resistance 100 Ω)
Voltage
• PC configurator software (model: JXCON)
Downloadable at M-System’s web site.
A dedicated cable is required to connect the module to the
PC. Please refer to the internet software download site or
the users manual for the PC configurator for applicable
cable types.
6: 1 – 5 V DC (Input resistance 1 MΩ min.)
OUTPUT 1
Voltage
6: 1 – 5 V DC (Load resistance 2000 Ω min.)
OUTPUT 2
Voltage
6: 1 – 5 V DC (Load resistance 2000 Ω min.)
18JF SPECIFICATIONS
ES-1880 Rev.11 Page 1/3
http://www.m-system.co.jp/