MG JFK User manual

EM-1681 Rev.6 P. 1 / 6
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
INSTRUCTION MANUAL
3-input MATH FUNCTION MODULE
(eld-programmable) MODEL JFK
BEFORE USE ....
Thank you for choosing us. Before use, please check con-
tents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact our sales office or representatives.
■PACKAGE INCLUDES:
Signal conditioner (body + base socket).............................(1)
■MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■INSTRUCTION MANUAL
This manual describes necessary points of caution when
you use this product, including installation, connection,
hardware setting and basic maintenance procedures.
When you need to change software settings, please refer to
the Operation Manual for Model PU-2x (EM-9255), Section
A.
POINTS OF CAUTION
■POWER INPUT RATING & OPERATIONAL RANGE
• Locate the power input rating marked on the product and
confirm its operational range as indicated below:
AC power: Rating ±10%, 50/60 ±2 Hz, approx. 3VA
DC power: Rating ±10%, approx. 2W
■GENERAL PRECAUTIONS
• Before you remove the unit from its base socket or mount
it, turn off the power supply and input signal for safety.
■ENVIRONMENT
• Indoor use.
• When heavy dust or metal particles are present in the
air, install the unit inside proper housing with sufficient
ventilation.
• Do not install the unit where it is subjected to continuous
vibration. Do not subject the unit to physical impact.
• Environmental temperature must be within -5 to +55°C
(23 to 131°F) with relative humidity within 30 to 90% RH
in order to ensure adequate life span and operation.
■WIRING
• Do not install cables close to noise sources (relay drive
cable, high frequency line, etc.).
• Do not bind these cables together with those in which
noises are present. Do not install them in the same duct.
■AND ....
• The unit is designed to function as soon as power is
supplied, however, a warm up for 10 minutes is required
for satisfying complete performance described in the data
sheet.
COMPONENT IDENTIFICATION
Body Base Socket
Connection Diagram
Front Cover
Specifications
■HOW TO OPEN THE FRONT COVER:
Hang your finger on the hook at the top of the front cover
and pull.
The shape of base socket may be different
for some models.
■FRONT PANEL CONFIGURATIONS
Zero Adj.
Modular Jack
Span Adj.

JFK
EM-1681 Rev.6 P. 2 / 6
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
INSTALLATION
Detach the yellow clamps located at the top and bottom of
the unit for separate the body from the base socket.
Clamp
(top & bottom)
DIN Rail
35mm wide
Spring Loaded
DIN Rail Adaptor
Shape and size of the base socket
are slightly different with various
socket types.
■DIN RAIL MOUNTING
Set the base socket so that its
DIN rail adaptor is at the bot-
tom. Hang the upper hook at
the rear side of base socket on
the DIN rail and push in the
lower. When removing the
socket, push down the DIN
rail adaptor utilizing a minus
screwdriver and pull.
■WALL MOUNTING
Refer to “EXTERNAL DI-
MENSIONS.”
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the connection diagram on the top of the unit.
■EXTERNAL DIMENSIONS unit: mm (inch)
5678
21 1110
80 (3.15)
50 (1.97) 107 (4.21)
136 (5.35) [3.3 (.13)]
80 (3.15)
20
(.79)
40 (1.57)
50 (1.97)
7.8 (.31)
CLAMP
(top & bottom)
DIN RAIL
35mm wide
2 – 4.5 (.18) dia.
MTG HOLE
25 (.98) deep
11
– M3.5
SCREW
• When mounting, no extra space is needed between units.
39
4
■CONNECTION DIAGRAM
+
–
+
–
INPUT 2
1
OUTPUT
2
+
–
INPUT 3
3
9
5
6
U(+)
V(–)
POWER
7
8
PU-2x
MODULAR JACK
+
–
INPUT 1
10
11

JFK
EM-1681 Rev.6 P. 3 / 6
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power input voltage: Check voltage across the terminal
7 – 8 with a multimeter.
3) Input: Check that the input signal is within 0 – 100% of
the full-scale.
4) Output: Check that the load resistance meets the de-
scribed specifications.
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any cali-
bration, unless you need to match the signal to a receiving
instrument or conduct regular calibration.
Zero and span are adjusted with using the Programming
Unit (model: PU-2x). Also, fine adjustments can be done
with the potentiometers behind the front cover.
Refer to the Operation Manual for Model PU-2x for expla-
nations how to use the programmer.
■WARNING ON USE OF THE PROGRAMMING UNIT
• Be sure to disconnect the Programming Unit before you
turn on/off power supply to the unit.
• The output signal is held when the Programming Unit is
connected. You need to disconnect when confirming cur-
rent output values.
■HOW TO CALIBRATE THE OUTPUT SIGNAL
Use a signal source and measuring instruments of sufficient
accuracy level. Turn the power supply on and warm up for
more than 10 minutes.
• Fine Output Calibration
Using the Programming Unit (ITEM 19, 20)
ITEM 19 is for Zero, and ITEM 20 is for Span.
1) Turn the unit into Program mode (ITEM 01).
2) Apply simulated 0% input. Increase/decrease values
(default: 0%) at ITEM 19 until the output signal is cali-
brated to actual 0%.
3) Apply simulated 100% input. Increase/decrease value
(default: 100%) at ITEM 20 until the output signal is cali-
brated to actual 100%.
4) Apply simulated 0% input again and check 0% output.
5) When 0% value is changed, repeat the above procedure
2) – 4).
The 0% value may be shifted when the output span is
greater than the input span (gain > 1).
• Fine Output Calibration via the Front Potentiometers
1) ZERO: Apply 0% input and adjust output to 0%.
2) SPAN: Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 0% input.
4) When ZERO value is changed, repeat the above proce-
dure 1) – 3).
MAINTENANCE
Regular calibration procedure is explained below:
■CALIBRATION
Warm up the unit for at least 10 minutes. Apply 0%, 25%,
50%, 75% and 100% input signal. Check that the output
signal for the respective input signal remains within accu-
racy described in the data sheet. When the output is out of
tolerance, recalibrate the unit according to the “ADJUST-
MENT PROCEDURE” explained earlier.
LIGHTNING SURGE PROTECTION
We offer a series of lightning surge protector for protec-
tion against induced lightning surges. Please contact us to
choose appropriate models.

JFK
EM-1681 Rev.6 P. 4 / 6
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
PROGRAMMABLE ITEMS
The following items can be monitored and programmed. For detailed explanations, please refer to the Operation Manual for
Model PU-2x (EM-9255), Section A.
[GROUP 01]
ITEM MDFY. DATA INPUT DISPLAY CONTENTS
01 S MAINTENANCE SWITCH (lock command)
0 MTSW: MON.MODE MONITOR mode: data monitoring only
1 MTSW: PRG.MODE PROGRAM mode: “P” marked data modifiable
02 P Alphabets & No. TG: XXXXXXXXXX Tag name entry (10 characters max.)
03
04
05
06
07
P
D
D
D
D
Number (%)
No input
No input
No input
No input
OUTPER XXX.XX
INPER1 XXX.XX
INPER2 XXX.XX
INPER3 XXX.XX
(X0) XXX.XXXX
Output status monitor (%) & simulation output
X1: Input 1 status monitor (%)
X2: Input 2 status monitor (%)
X3: Input 3 status monitor (%)
X0: Normalization parameter monitor (1.0000=100%)
10 P TYPE OF EQUATION
1 X1 * SQR (X2 / X3) Temp. & press. compensation for DP flowmeter
X0=K1X1
K2X2+ A2
√K3X3+ A3
where X1 = flow
X2= pressure
X3= temperature
Specify ITEM 11 square root extraction for a square input X1.
2 X1 + X2 + X3 Addition & Subtraction
X0= K0{K1(X1 + A1) + K2 (X2 + A2) + K3 (X3 + A3)} + A0
3 X1 * X2 * X3 Multiplication
X0= K0(K1X1+ A1)(K2X2+ A2)(K3X3+ A3) + A0
4 (X1 * X2) / X3 Multiplication & Division
X0=K0(K1X1+ A1)(K2X2+ A2)+A0
K3X3+ A3
5 X1 / (X2 * X3) Multiplication & Division
X0=K0(K1X1+ A1)+A0
(K2X2+ A2)(K3X3+ A3)
6 (X1 + X2) * X3 Addition & Multiplication
X0= K0(K1X1+ K2X2+ A1)(K3X3+ A3) + A0
7 (X1 + X2) / X3 Addition & Division
X0=K0(K1X1+ K2X2+ A1)+A0
(K3X3+ A3)
8 X1 / (X2 + X3) Division & Addition
X0=K0(K1X1+ A1)+A0
(K2X2+ K3X3+ A2)
9 X1 + (X2 * X3) Addition & Multiplication
X0= K0(K1X1 + A1) + K0(K2X2 + A2)(K3X3 + A3) + A0
10 X1 + (X2 / X3) Addition & Division
X0=K0(K1X1+ A1)+K0 (K2X2+ A2)+A0
(K3X3+ A3)
11 P SQUARE ROOT EXTRACTION FOR INPUT X1
0 SQR NO OPTION Without
1 SQR OPTION With
19 P Percentage FINZER Fine zero adjustment
Initial status shows actual bias (%). When data is entered, out-
put (%) is shown.
20 P Percentage FINSPN Fine span adjustment
Initial status shows actual gain (%). When data is entered, out-
put (%) is shown.

JFK
EM-1681 Rev.6 P. 5 / 6
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
ITEM MDFY. DATA INPUT DISPLAY CONTENTS
21
22
23
24
P
P
P
P
Number
Number
Number
Number
(K0) XX.XXX
(K1) XX.XXX
(K2) XX.XXX
(K3) XX.XXX
Gain K0(1.000 = 100%)
Gain K1(1.000 = 100%)
Gain K2(1.000 = 100%)
Gain K3(1.000 = 100%)
25
26
27
28
P
P
P
P
Number (%)
Number (%)
Number (%)
Number (%)
(A0) XXX.XX
(A1) XXX.XX
(A2) XXX.XX
(A3) XXX.XX
Bias A0(%)
Bias A1(%)
Bias A2(%)
Bias A3(%)
29
30
31
P
P
P
Number (%)
Number (%)
Number (%)
X1LMTL XXX.XX
X2LMTL XXX.XX
X3LMTL XXX.XX
Input LOW limit X1(-25.00 – +125.00%)
Input LOW limit X2(-25.00 – +125.00%)
Input LOW limit X3(-25.00 – +125.00%)
32
33
34
P
P
P
Number (%)
Number (%)
Number (%)
X1LMTH XXX.XX
X2LMTH XXX.XX
X3LMTH XXX.XX
Input HIGH limit X1(-25.00 – +125.00%)
Input HIGH limit X2(-25.00 – +125.00%)
Input HIGH limit X3(-25.00 – +125.00%)
Modication Code
D: No modification (writing) possible. Used only for monitoring (reading).
S: Modifiable at any time.
P: Modifiable only when the MAINTENANCE SWITCH is in the “PRG” mode.

JFK
EM-1681 Rev.6 P. 6 / 6
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
■TEMPERATURE COMPENSATION FOR DP FLOWMETER
X3: 100%
ORIFICE
DESIGN STANDARD
X3: 0%
0 K (Kelvin)
T3°C
T2
T1
-273.14
K1= I/O range scaling factor
K1= 1 when input & output ranges are identical.
K3=T3– T1A3=T1+ 273.14
T2+ 273.14 T2+ 273.14
[EXAMPLE]
Temp. range of DP flowmeter: 0 – 400°C
Design standard of orifice: 300°C
K1= 1
K3=400 – 0 = 0.698
300 + 273.14
A3=0 + 273.14 = 0.4766 = 47.66%
300 + 273.14
■PRESSURE COMPENSATION FOR DP FLOWMETER
Atmospheric pressure = 101.3 kPa (abs) • Absolute Pressure
K2=B3– B1A2=B1
X2: 100%
ORIFICE
DESIGN STANDARD
X2: 0%
0 kPa (abs)
B3
B2
B1
0
G3
G2
G1
-101.3
Absolute
Pressure
kPa (abs)
Gauge
Pressure
kPa (G)
B2B2
• Gauge Pressure
K2=G3– G1A2=G1+ 101.3
G2+ 101.3 G2+ 101.3
[EXAMPLE]
Press. range of DP flowmeter: 0 – 980 kPa (G)
Design standard of orifice: 686 kPa (G)
K1= 1
K2=980 – 0 = 1.245
686 + 101.3
A2=0 + 101.3 = 0.1287 = 12.87%
686 + 101.3