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DMS-30LCDA-4/20 Series
Loop-Powered, 1.8V Drop, 4-20mA Process
4. Apply a precision 20mA input and adjust R7 until the display reads “1800.”
Repeat steps 3 and 4 to make sure the adjustments do not affect one
another.
5. Select the appropriate decimal point by setting SW6, SW7 or SW8 to ON
(DP1, DP2 or DP3 respectively).
NOTE: If a display reading other than “000” to “1000” is desired,
refer to DIP-Switch Settings Table 2 for SW1-SW5 settings
Monitors with Full-Size LCD Displays
When con?guring the DMS-30LCDA-4/20B for the ?rst time, or when
selecting a new range, set both R3 and R7 fully clockwise (roughly 22 turns)
to their minimum offset/minimum-span positions, respectively. Then select
the desired readings from Table 3 and con?gure DIP-switches SW1, SW2,
and SW3 accordingly. Please note, positions SW4 and SW5 are not used in
bipolar ‘B’ models.
Table 2.
DMS-30LCDA-4/20B (Standard Unipolar) DIP Switch Settings
The procedure below illustrates how to calibrate the DMS-30LCDA-4/20B
Desired Display Reading
to its factory-calibrated readings of “-1000” with a 4mA input and “1000”
4mA
20mA
SW1
SW2
SW3
SW4
SW5
with a 20mA input. When performing DIP-switch settings, be sure the DIP-
1. 000 to 1200 to 1999
2. 000 to 600 to 1200
3. 000 to 400 to 600
4. 000 to 200 to 400
5. 000 to 100 to 200
Off
On
Off
On
On
Off
Off
Off
On
On
Off
Off
On
On
On
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
switch’s small actuators are ?rmly engaged in their fully ON or fully OFF
positions.
1. Set both R3 and R7 fully clockwise.
2. Select DIP-switch setting #1 from Table 3.
3. Apply a precision 12mA input and adjust R3 until the meter’s display reads
“000.”
4. Apply a precision 20mA input and adjust R7 until the meter’s display reads
Examples (DMS-30LCDA-4/20S, Unipolar)
“1000.”
1. Desired display readings are:
4mA ="0.00"
O N
5. Apply a precision 4mA input and the display should read “-1000.” Repeat
steps 3 and 4 to make sure the two adjustments did not affect one another.
20mA = "6.00"
1
2
3
4
5
6
7
8
Use DIP-switch setting #3 in Table 2 and enable decimal point DP2
via SW7. Apply 4mA and adjust R3 so the display reads “0.00.” Apply
20mA and adjust R7 so the display reads “6.00.”
Table 3. DMS-30LCDA-4/20B (Bipolar) DIP Switch Settings
2. Desired display readings are:
O N
Desired Display Reading
4mA 12mA
20mA
SW1
SW2
SW3
SW4
SW5
4mA =" 000"
1. –600 to –1000 000
600 to 1000
Off
Off
Off
NA
NA
3
4
2
5
6
1
7
20mA = "800"
Use DIP-switch setting #2 in Table 2. Apply 4mA and adjust R3 so the
display reads “000.” Apply 20mA and adjust R7 so the display reads
“800.” For these display readings, no decimal points are used. Set
8
2. –350 to –650
3. –250 to –400
4. –150 to –250
5. –100 to –150
000
000
000
000
350 to 650
250 to 400
150 to 250
100 to 150
On
Off
Off
On
Off
On
Off
On
Off
Off
On
On
NA
NA
NA
NA
NA
NA
NA
NA
SW6, SW7 and SW8 to OFF.
Examples (DMS-30LCDA-4/20B, Bipolar )
3. Desired display readings are:
O N
1. Desired display readings are:
O N
4mA = ".000"
12mA = ".250"
1
2
3
4
5
6
7
8
4mA ="–1.00"
20mA = "1.00"
1
2
3
4
5
6
7
8
O N
This example is not as straightforward as the previous two.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 Table 2 we can now select DIP-switch setting #3
and enable DP1 via SW6. Apply 4mA and adjust R3 so the display reads
“.000.” Apply 12mA and adjust R7 so the display reads “.250.”
Use DIP-switch setting #5 in Table 3 and enable decimal point DP2
via SW7. Apply 12mA and adjust R3 so the display reads “0.00.”
Apply 20mA and adjust R7 so the display reads “1.00.” Apply 4mA
and verify that the display reads “-1.00”, readjust R3 and R7 if nec-
essary.
2. Desired display readings are:
DMS-30LCDA-4/20B (Bipolar-Reading )
The DMS-30LCDA-4/20B’s zero-offset circuit differs from the unipolar
4mA =" –450"
20mA = "450"
1
2
3
4
5
6
7
8
‘S’ model described above in that with the ‘B’ model, a half-scale
12mA input is typically set to display “000.” Therefore, all of the of the
DIP-switch settings in Table 3 assume a reading of “000” is desired
with a half-scale 12mA input. Display readings other than those
shown in Table 3 are possible, contact DATEL for more information.
Use DIP-switch setting #2 in Table 3. Apply 12mA and adjust R3 so
the display reads “000.” Apply 20mA and adjust R7 so the display
reads “450.” Apply 4mA and verify that the display reads “-450.”
Repeat adjustment procedure if necessary. For these display read-
ings, no decimal points are used. Set SW6, SW7and SW8 to OFF.
www.murata-ps.com/dpm
19 Jan 2011
email: sales@murata-ps.com
MPM_DMS30-LCDA.B05 Page 3 of 6
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