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| 型号： | DMS-20LCD-4/20S-C |
| 厂商： | Murata Power Solutions Inc |
| 文件页数： | 3/6页 |
| 文件大小： | 0K |
| 描述： | METER LCD SELF-POWERED 3.5DIG |
| 产品目录绘图： | Digital Panel Meter |
| 标准包装： | 12 |
| 系列： | DMS-20LCD-4/20S |
| 类型： | 过程多用表（4-20mA 回路） |
| 测量范围： | 4-20mA 回路 |
| 显示器样式： | 黑色字符，灰色背景 |
| 显示器类型： | LCD |
| 显示器正面尺寸： | 1.30" L x 0.80" W（33.0 x 20.3mm） |
| 显示器位数： | 3.5 |
| 显示器位数 - 高度： | 0.370"（9.40mm） |
| 背光： | 无 |
| 安装类型： | 面板安装 |
| 端子： | 端接块 |
| 产品目录页面： | 2856 (CN2011-ZH PDF) |
| 其它名称： | 811-1077 |
DMS-20LCD-4/20 Series
4-20mA Input Loop-Powered Ultra-Low 1.8V Loop Drop
3? Digit LCD Display Process Monitors
Table 1.
DMS-20LCD-4/20S (Unipolar Model) DIP-Switch Settings ?
20mA and adjust R7 so the display reads "1.00". Apply 4mA and
Display Reading
4mA
20mA
SW1
SW2
SW3
verify that the display reads "–1.00", readjust R3 and R7 if necessary.
2. Desired display readings are:
ON
20mA = "450"
1.
2.
3.
4.
5.
000
000
000
000
000
to
to
to
to
to
1050-1999
650-1350
450-800
300-500
200-300
Off
On
Off
Off
On
Off
Off
On
Off
On
Off
Off
Off
On
On
4mA = "–450"
1 2 3 4 5 6
Use DIP-switch setting #2 in Table 2. 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".
? When looking up DIP-switch settings in the Tables and the desired display
readings can be achieved with either of two different settings, using the higher
Repeat adjustment procedure if necessary. For these display read
ings, no decimal points are used. Set SW4, SW5 and SW6 to OFF.
setting # will produce less sensitive offset (R3) and span (R7) adjustments.
Please keep in mind that the DMS-20LCD standard meter (from which the DMS-
3. Desired display readings are:
ON
20LCD-4/20 is derived) has an accuracy speci?cation of ±2 counts (max.). Thus,
it may not always be possible to obtain the exact desired display reading.
4mA = "–650"
20mA = "650"
1
2
3
4
5
6
DMS–20LCD–4/20B (Bipolar Reading Model)
The DMS-20LCD-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 normally set to display "000". Therefore, all of the of the DIP-switch
settings in Table 2 assume a reading of "000" is desired with a 12mA input.
Display readings other than those shown in Table 2 are possible, contact
DATEL for more information.
When con?guring the DMS-20LCD-4/20B for the ?rst time, or when select-
ing a new range, set both R3 and R7 fully clockwise (roughly 22 turns) to
Notice that these readings can be obtained using either DIP-switch
setting #1 or DIP-switch setting #2 in Table 2. In situations like this
where DIP-switch settings overlap, less-sensitive R3/R7 adjustments
can be achieved if the higher DIP-setting # is selected (setting #2
in this example). Apply 12mA and adjust R3 so the display reads
"000". Apply 20mA and adjust R7 so the display reads "650". Apply
4mA and verify that the display reads "–650". Repeat adjustment
procedure if necessary.
T able 2. DMS-20LCD-4/20B (Bipolar Model) DIP-Switch Settings ?
their minimum offset/minimum-span positions, respectively. Then select
the desired readings from Table 2 and con?gure DIP-switches SW1, SW2,
Display Reading
4mA
12mA
20mA
SW1
SW2
SW3
and SW3 accordingly.
The procedure below illustrates how to calibrate the DMS-20LCD-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 ?rmly engaged in their fully-ON or fully-OFF
1.
2.
3.
4.
5.
–600 to –1000
–350 to –650
–250 to –400
–150 to –250
–100 to –150
000
000
000
000
000
600 to 1000
350 to 650
250 to 400
150 to 250
100 to 150
Off
On
Off
Off
On
Off
Off
On
Off
On
Off
Off
Off
On
On
positions.
1. Set both R3 and R7 fully clockwise.
2. Select DIP-switch setting #1 from Table 2.
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 "1000".
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.
Examples (DMS-20LCD-4/20B-Bipolar Model)
DMS-20LCD-4/20P (Positive Reading Model)
The DMS-20LCD-4/20P’s Zero-Offset circuit is optimized to produce
positive readings at both 4mA and 20mA input levels. As shown in Table
3’s ?rst three columns, a 4mA input can be typically adjusted (using
R3, Zero/Offset Adjust) to display any positive reading between “000”
and “800”. The corresponding 20mA-input reading is then added to the
4mA offset as a differential whose magnitude is varied by adjusting R7
(Gain/Span Adjust).
The ‘Differential Range’ column in Table 3 lists the nominal differential
display-readings which can be obtained with R7 at, or very close to, its
full-clockwise, minimum span position. The Differential Range column can
be used as a guide when con?guring the meter for the majority of user
1. Desired display readings are:
ON
applications. Higher differential ranges are obtainable; however, the use
4mA = "–1.00"
20mA = "1.00"
1 2 3 4 5 6
Use DIP-switch setting #5 in Table 2 and enable decimal point DP2 via
SW5. Apply 12mA and adjust R3 so the display reads "0.00". Apply
www.murata-ps.com/dpm
of higher differential readings results in correspondingly-lower positive
readings with 4mA inputs, that is, R3’s clockwise adjustment-range is re-
duced. Example #3 below illustrates this concept. Please contact DATEL
if there is any doubt as to whether or not the DMS-20LCD-4/20P can be
con?gured for your display readings requirements.
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MPM_DMS20LCD-420.B03 Page 3 of 6
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相关代理商/技术参数 |
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| DMS20N | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| DMS-20PC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:3 Digit, LED Display Low-Cost, Subminiature Digital Panel Voltmeters |
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| DMS-20PC-0/5-24RL | 功能描述:数字面板表 0-5V and 0-10V input 3 1/2 digit red LED RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM |
| DMS-20PC-0/5-24RL-C | 功能描述:数字面板表 0-5V and 0-10V input RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM |
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