M-system 6BLC Manual de usuario
BEFORE USE ....
Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.
■PACKAGE INCLUDES:
Transmitter module............................................................(1)
Outdoor enclosure ...............................................................(1)
Mounting screws
Bolt (M8 × 15)....................................................................(4)
Spring washer for M8 .......................................................(4)
Mounting bracket assembly (optional)
Mounting bracket..............................................................(1)
M10 U-bolt.........................................................................(2)
Nut for M10 .......................................................................(4)
Spring washer for M10 .....................................................(4)
■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 and
basic maintenance procedures.
POINTS OF CAUTION
■GENERAL PRECAUTIONS
• Before you remove the unit or mount it, turn off the power
supply and input signal for safety.
■ENVIRONMENT
• 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 +70°C
(23 to 158°F) 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 sup-
plied, however, a warm up for 10 minutes is required for
satisfying complete performance described in the data
sheet.
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-8890 Rev.1 P. 1 / 5
INSTRUCTION MANUAL
STRAIN GAUGE TRANSMITTER MODEL 6BLC
COMPONENT IDENTIFICATION
Case
Specifications
Transmitter Module
Gasket
Cover
Internal Earthing Screw
External Earthing Screw
Spring Clip(s)
Knurled Knob(s)
Cable Entry Conduit
•Case Details
6BLC
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-8890 Rev.1 P. 2 / 5
EXTERNAL DIMENSIONS unit: mm (inch)
4–M8, 12 deep
92 (3.62)
110 (4.33)
70 (2.76)
118 (4.65)
7 (.28)
max.
39 (1.54)
19 (.75)
92 (3.62)
104 (4.09)
14
(.55)
26
(1.02)
MOUNTING BRACKET
(optional)
110 (4.33) dia.
19 (.75)
2–G 1/2, 1/2NPT, M20x1.5 or PG13.5
174 (6.85)
114 (4.49)
110 (4.33)
SPACE REQUIRED TO REMOVE COVER
6BLC
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-8890 Rev.1 P. 3 / 5
INSTALLATION
■MOUNTING THE ENCLOSURE ON A PIPE ■MOUNTING THE ENCLOSURE ON A WALL
TERMINAL CONNECTIONS
Connect the unit as in the diagram below.
LOAD
OUTPUT
24V DC
4 – 20mA DC
+
−
+
−
5
6
4
1
2
+
−
3
STRAIN GAUGE
(4-WIRE BRIDGE CIRCUIT)
EXC.
INPUT
6BLC
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-8890 Rev.1 P. 4 / 5
WIRING INSTRUCTIONS
■SCREW TERMINAL
Torque: 0.6 N·m
CHECKING
Open the unit’s outdoor enclosure cover when you conduct
checking of the transmitter. Be sure to close the cover after
the checking is complete.
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Strain gauge: Nominal bridge resistance of strain gauges
that can be connected to the unit is 350 Ω or greater.
3) Input: Check that the input signal is within 0 – 100% of
the full-scale. When applying maximum load, check that
voltage equals Exc. × Strain Gauge Sensitivity.
4) Output: Check that the load is within the permissible
limit including wiring resistance.
Load Resistance (Ω) = Supply Voltage (V) – 13 (V)
0.02 (A)
(including leadwire resistance)
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any cali-
bration.
For matching the signal to a receiving instrument or in case
of regular calibration, adjust the output as explained below.
Zero and Span adjustments are located behind the top cover
of the unit. Open the enclosure cover, release the knurled
knobs at the front of the unit and open the top cover.
After the calibration is complete, be sure to close both cov-
ers.
1234
56
VR1 VR2
■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.
1) ZERO: Apply 0% input and adjust output to 0% with the
VR1.
2) SPAN: Apply 100% input and adjust output to 100% with
the VR2.
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
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.
6BLC
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-8890 Rev.1 P. 5 / 5
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