DMS-30LCDA-4/20B Murata Power Solutions Inc, DMS-30LCDA-4/20B Datasheet - Page 3

• Manufacturer Part Number: DMS-30LCDA-4/20B
• Description: DATEL PANEL METERS
• Manufacturer: Murata Power Solutions Inc
• Type: Digital Process Monitorr

Specifications of DMS-30LCDA-4/20B

• Rohs Compliant: NO
• Equipment Type: Digital Process Monitor
• Input: + 20.4 mA
• Display Type: 3 - 1/2 Digit LCD
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4. Apply a precision 20mA input and adjust R7 until the display reads “1800.”
5. Select the appropriate decimal point by setting SW6, SW7 or SW8 to ON
Table 2.
Examples (DMS-30LCDA-4/20S, Unipolar)
DMS-30LCDA-4/20B (Bipolar-Reading
1. Desired display readings are:
2. Desired display readings are:
3. Desired display readings are:
Desired Display Reading
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
NOTE: If a display reading other than “000” to “1000” is desired,
refer to DIP-Switch Settings Table 2 for SW1-SW5 settings
Repeat steps 3 and 4 to make sure the adjustments do not affect one
another.
(DP1, DP2 or DP3 respectively).
The DMS-30LCDA-4/20B’s zero-offset circuit differs from the unipolar
‘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 #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.”
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
SW6, SW7 and SW8 to OFF.
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.”
4mA
DMS-30LCDA-4/20B (Standard Unipolar) DIP Switch Settings
20mA
4mA ="0.00"
20mA = "6.00"
4mA =" 000"
20mA = "800"
4mA = ".000"
12mA = ".250"
SW1
Off
On
Off
On
On
SW2
Off
Off
Off
On
On
SW3
Off
Off
On
On
On
)
SW4
Off
Off
Off
Off
On
www.murata-ps.com/dpm
SW5
Off
Off
Off
Off
Off
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
4. Apply a precision 20mA input and adjust R7 until the meter’s display reads
5. Apply a precision 4mA input and the display should read “-1000.” Repeat
Table 3. DMS-30LCDA-4/20B (Bipolar) DIP Switch Settings
When confi guring the DMS-30LCDA-4/20B for the fi 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 confi gure DIP-switches SW1, SW2,
and SW3 accordingly. Please note, positions SW4 and SW5 are not used in
bipolar ‘B’ models.
The procedure below illustrates how to calibrate the DMS-30LCDA-4/20B
to its factory-calibrated readings of “-1000” with a 4mA input and “1000”
with a 20mA input. When performing DIP-switch settings, be sure the DIP-
switch’s small actuators are fi rmly engaged in their fully ON or fully OFF
positions.
“000.”
“1000.”
steps 3 and 4 to make sure the two adjustments did not affect one another.
Examples (DMS-30LCDA-4/20B, Bipolar )
1. Desired display readings are:
2. Desired display readings are:
1. –600 to –1000 000
2. –350 to –650
3. –250 to –400
4. –150 to –250
5. –100 to –150
Loop-Powered, 1.8V Drop, 4-20mA Process
Desired Display Reading
4mA
4mA ="–1.00"
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.
4mA =" –450"
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.
DMS-30LCDA-4/20 Series
Monitors with Full-Size LCD Displays
20mA = "1.00"
20mA = "450"
12mA
000
000
000
000
600 to 1000
350 to 650
250 to 400
150 to 250
100 to 150
20mA
19 Jan 2011 MPM_DMS30-LCDA.B05 Page 3 of 6
SW1
Off
On
Off
Off
On
SW2
Off
Off
On
Off
On
email: [e-mail]
SW3
Off
Off
Off
On
On
SW4
NA
NA
NA
NA
NA
SW5
NA
NA
NA
NA
NA