dms-eb-lp Murata Manufacturing Co., Ltd, dms-eb-lp Datasheet - Page 2

• Manufacturer Part Number: dms-eb-lp
• Description: 4-20ma Current Loop Application Board For Dms-30lcd Meters
• Manufacturer: Murata Manufacturing Co., Ltd

Performance/Functional Specifi cations
(TA = +25°C)
Operating and Setup Instructions
As shipped, the DMS-EB-LP is factory calibrated to read "000" for a 4mA
input and "1999" for a 20mA input but may require recalibration when con-
nected to a DMS-30LCD-1-5 digital voltmeter.
The following worst-case procedure assumes the DMS-EB-LP is completely
mis-adjusted, i.e., both potentiometers and the DIP switches are randomly
set.
1. Set R7 (full scale gain adjust) and R3 (zero/offset adjust) fully clockwise,
2. Set SW1 to ON (up position). See DIP switch setting #3 in Table 1.
3. Apply a precision 4mA input, with proper polarity, and adjust R3 until
4. Apply a precision 20mA input and adjust R7 until the meter's display
5. Select the appropriate decimal point by setting SW5, SW6 or SW7 to ON
NOTE: If a display reading other than "000" to "1999" is desired, refer to
Table 1 for SW1-SW4 settings.
Input
Full Scale Input
Performance
Voltage Drop
Input Resistance
Accuracy
Operating Temperature Range
Temperature Drift
Physical/Environmental
Storage Temperature
Humidity
Dimensions
TB1 Wire Size and Strip Length:
Ordering Information
Model
DMS-EB-LP
DMS-BZL1
DMS-BZL2
roughly 22 turns, and place SW1-SW8 to OFF (down position).
the meter's display reads "000".
reads "1999". Repeat steps 3 and 4 to make sure the adjustments do
not affect one another.
(DP1, DP2 or DP3 respectively).
Current loop board
Bezel assembly
Bezel assembly with sealing gasket
4mA to 20mA
7.5V, maximum
550Ω, nominal
±0.05%FS ±1 count
0 to +60°C
±100ppm/°C, typical
–20 to +75°C
0 to 95%, non-condensing
2.02" (51.31mm)L x 0.83" (21.08mm)W
18 to 26 AWG (solid or stranded)
Strip Length 0.20" (5.08mm)
www.murata-ps.com/dpm
4-20mA Current Loop Application Board for DMS-30LCD Meters
NOTE: When looking up DIP-switch settings in the Table and the desired
display readings happen to fall between two switch settings, try performing
the adjustments with both settings to determine which one offers the better
settability. Please keep in mind that the DMS-30LCD meter has an accuracy
specifi cation of ±2 counts (max.). Thus, it may not always be possible to
obtain the exact desired display reading.
Examples
1. Desired display readings are:
2. Desired display readings are:
3. Desired display readings are:
4. Desired display readings are:
Display Reading
1. 000 to 100-300
2. 000 to 400-600
3. 000 to 700-1999
4. ±100
5. ±200 to ±300
6 ±400 to ±600
7 ±700 to ±1900
Use DIP-switch setting #1 and enable decimal point DP2 via SW6. Apply
4mA and adjust R3 so the display reads "0.00". Apply 20mA and adjust
R7 so the display reads "2.00".
Use DIP-switch setting #4. Apply 12mA and adjust R3 so the display
reads "000". Apply 20mA and adjust R7 so the display reads "100".
Apply 4mA and the display should read "–100". For these display read-
ings, no decimal points are used. Set SW5, SW6 and SW7 to OFF (down
position).
Use DIP-switch setting #7 and enable decimal point DP3 via SW7. Apply
12mA and adjust R3 so the display reads "000". Apply 20mA and adjust
R7 so the display reads "157.5". Apply 4mA and the display should read
"–157.5".
This example is not as straightforward as the previous three. Notice that
12mA is exactly halfway between 4mA and 20mA. If we assume that
the input could go up to 20mA, the display reading would then be: 2 x
.250 or ".500". From the chart, we can now select DIP-switch setting
#2 and enable DP1 via SW5. Apply 4mA and adjust R3 so the display
reads ".000". Apply 12mA and adjust R7 so the display reads ".250".
4mA ="0.00"
20mA = "2.00"
4mA =" –100"
12mA = "000"
20mA = "100"
4mA = "-157.5"
12mA = "00.0"
20mA = "157.5"
4mA = ".000"
12mA = ".250"
Technical enquiries email: [e-mail], tel:
Table 1. DIP-Switch Settings
SW1
Off
Off
On
On
On
On
On
MPM_DMS-EB-LP.B01 Page 2 of 3
SW2
DMS-EB-LP
Off
Off
Off
On
On
On
On
SW3
Off
Off
Off
Off
Off
On
On
[phone]
SW4
Off
Off
Off
Off
Off
Off
On