M-system MXT, Instruction Manual

Page: 3 / 4

MXT
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax:
+81(6)6659-8510 E-mail: info@m-system.co.jp
EM-1712 Rev.4 P. 3 / 4
Programming can be done in the Program Mode. Return the
unit back to Monitor Mode other than for programming. Turn-
ing the power supply off in the Program Mode may not save
modified settings.
■
SELECTING THERMOCOUPLE TYPE
[E.G.] J thermocouple
1) Program Mode
Set ITEM 01 – DATA 2 to turn the unit into Program
Mode.
2) Thermocouple Type
Choose ITEM 03 – DATA 3.
3) Monitor Mode
Set ITEM 01 – DATA 1 to turn the unit into Monitor
Mode.
■
SELECTING TEMPERATURE RANGE
[E.G.] -200 to 750°C
1) Turn the unit into Program Mode.
2) 0% Temperature Range
Choose ITEM 13 – DATA -200.0
3) 100% Temperature Range
Choose ITEM 14 – DATA 750.0
4) Turn the unit into Monitor Mode.
Note: Enter the temperature values in the unit specified with
ITEM 09.
■
SELECTING OUTPUT RANGE
[E.G.] -10.0 to 0.0V DC
1) Turn the unit into Program Mode.
2) 0% Output Voltage
Choose ITEM 15 – DATA -10.0.
3) 100% Output Voltage
Choose ITEM 16 – DATA 0.0.
4) Turn the unit into Monitor Mode.
5) Set to ITEM P.
■
BURNOUT
[E.G.] Downscale burnout
1) Turn the unit into Program Mode.
2) Burnout Protection
Choose ITEM 12 – DATA 0.
3) Turn the unit into Monitor Mode.
■
RESET ALL SETTINGS
Returning the unit into the factory-default settings.
1) Turn the unit into Reset Mode.
Set ITEM 01 – DATA 3 to turn the unit into Reset Mode.
2) Call up the Reset menu.
Choose ITEM 18 – DATA 1. (Press DATA UP key.)
3) Resetting Enable
Double-click DATA DOWN key. DATA 0 is displayed af-
ter the initialization is complete.
4) Turn the unit into Monitor Mode.
If necessary, go to Moving Average and other adjustments.
Set the unit to Monitor Mode other than for programming.
■
STATUS LED, PL2
When the PL2 is turned on, identify the device status with
ITEM 02.
REF. STATUS
12
Burnout: Wire breakdown or invalid overrange
input.
Check T/C wires, T/C type and temperature range.
13
Input range setting: 0% Setting > 100% Setting
See ITEM 13 / 14.
15
Output range setting: 0% Setting > 100% Setting
See ITEM 15 / 16.
99
Memory error: Initialize all the settings of the unit
by operating ITEM 18 and program the unit again.
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the con-
nection diagram on top of the unit.
+
–
3
OUTPUT
1
2
U(+)
V(–)
POWER
7
8
+
–
T/C
CJC
SENSOR
metal leg
comp. leadwire
5
4
+
–
model: CJM
CHECKING
1) Terminal wiring:
Check that all cables are correctly connected according to
the connection diagram.
2) Power input voltage:
Check voltage across the terminal 7 – 8 with a multim-
eter.
3) Input:
Check that the input voltage is within 0 – 100% of full-
scale.
If the thermocouple or its extension wires are broken, the
output goes over 100% (below 0% with downscale) due to
the burnout function. Check leadwires in such a case.
4) Output:
Check that the load resistance meets the described specifica-
tions.
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 as explained earlier (ITEM
07 and 08).
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.