User's Manual
MS3704SW
Slim Plug-In High-Level Signal Conditioner (Isolator) with Isolated Dual Output
(I/O Switch Selectable)
Rev. 1.30
4
10. Input/Output Settings
10-1. Front & Rear Panel Components
Front Panel
Rear Panel
Input Selector Switch
Output-1 SPAN Trimmer
Output-1 ZERO Trimmer
Output-1 Selector Switch
Output-2 SPAN Trimmer
Output-2 ZERO Trimmer
Output-2 Selector Switch
10-2. Input Settings
You can use the input selector switch on the rear panel to configure
input for any of the following:
Note: The setting must be done with power off.
Input: 1-5V; Burnout: Upscale
Rear Panel
1 2 3
ON OFF OFF
Input: 1-5V; Burnout: Downscale
1 2 3
OFF ON OFF
Input: 4-20mA
1 2 3
OFF OFF ON
10-3. Output Settings
You can use the output selector switch on the front panel to
configure output for either of the following:
Note: The setting must be done with power off.
Output: 4-20mA
Front Panel
Io Vo
ON OFF
Output: 1-5V
Io Vo
OFF ON
11. Adjustment
Since the unit is precisely factory-adjusted before shipment, no
further adjustment is needed at the user’s side. Adjustment of signal
conditioners requires technical expertise and fine craftsmanship. We
recommend that you use adjustment service of MTT to save costs
and ensure accuracy. Please contact MTT or its local
representatives. Just for your reference, the adjustment procedure
is described below.
11-1. Preparation
For the terminal assignments, refer to section 5.
The wiring work should be performed with no power applied to
the instrument.
Wiring should be connected to the terminal block.
At least 30 minutes of warm-up is required before adjustment.
The accuracy of measuring equipment to be used for calibration
must be much higher than that of the instrument to be adjusted.
11-2. Adjustment Procedure
(1) Connect the unit as illustrated below.
(2) Adjust the voltage source to generate a signal equivalent to 0%
of the input range of the unit.
(3) Slowly turn the ZERO Trimmer to get 0% output while applying
0% input as above.
(4) Adjust the voltage source to generate a signal equivalent to
100% of the input range of the unit.
(5) Slowly turn the SPAN Trimmer to get 100% output while
applying 100% input as above.
(6) Repeat steps (2) through (5) until zero and span are precisely
adjusted.
(7) Adjust the voltage source to generate 25%, 50% and 75% of
the input signal range of the unit and record the values of output
signals to confirm they are linearly proportional.
Note: Use the OUTPUT-1 trimmers for adjustments of Output 1 and
the OUTPU-2 trimmers for those of Output 2.
CALIBRATED
ADJUSTABLE
VOLTAGE
SOURCE
MULTIMETER
MULTIMETER
POWER SUPPLY
12. Maintenance and Inspection
12-1. Cleaning
When cleaning, wipe the unit gently with a soft cloth, damped with
water. Do not use solvents such as alcohol or benzene.
12-2. Periodic Inspection
Check the unit for proper characteristics and settings about once
every two years.
13. Warranty Period and Scope
[Warranty Period]
MTT’s hardware products are warranted for a period of seven (7)
years from the date of shipment.
[Warranty Scope]
1) MTT warrants that its hardware products are free from defects
in materials and workmanship and conform to its product
specifications.
2) MTT ships the products under its appropriate quality
management system and quality control, but does not warrant,
expressed or implied, that the operation, output, or indication
of the hardware will be uninterrupted or error free. MTT shall
not be liable and make no warranty for any damage to or any
safety or performance trouble in the customer’s or any other
third party’s equipment if the operation, output, or indication is
interrupted or faulty.
3) If, during the warranty period, the product proves to be
defective when used in accordance with the relevant user’s
manual, the product will be repaired or replaced.
4) This warranty does not apply to any malfunction or failure
resulting from the following:
a. Improper or incomplete maintenance or calibration,
b. Any other cause, which does not relate with the delivered
product,
c. Modification or repair by any person other than MTT, and
d. Natural disasters or other unavoidable accidents, for which
MTT is not liable.
