DMS-30LCDA-4/20S-C【PDF 4/6 页】METER LCD SELF-POWERED 3.5DIG

您好，
买卖IC网欢迎您。
请登录
免费注册

1页 2页 3页 [4页]5页 6页

DMS-30LCDA-4/20 Series

Loop-Powered, 1.8V Drop, 4-20mA Process

3. Desired display readings are:

4mA = "–650"

ON

Monitors with Full-Size LCD Displays

2. Subtract 040 from 200 to yield a differential-reading value of 160;

use this value to select DIP-switch setting #5 in Table 4. Enable

20mA = "650"

1

2

3

4

5

6

7

8

decimal point DP3 by placing SW8 to the ON position.

Notice that these readings can be obtained using either DIP-switch

setting #1 or DIP-switch setting #2 in Table 3. 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 adjustments if

necessary.

3. Set the transmitter’s output to 4.0mA and carefully adjust R3 clock-

wise until the meter’s display reads “000.”

4. Set the transmitter’s output to 20.0mA and adjust R7 counterclock-

wise until the meter’s display reads “16.0.”

5. Set the transmitter back to 4.0mA and slowly adjust R3 clockwise

until the display reads “04.0.” Reapply 20.0mA and the display

should now read “20.0.” Repeat steps 3, 4, and 5 to make sure the

adjustments did not affect one another.

DMS-30LCDA-4/20P (Positive-Reading)

Table 4.

DMS-30LCDA-4/20P (Positive Reading)

DIP Switch Settings

The DMS-30LCDA-4/20P’s zero-offset circuit is optimized to produce

Desired Display Readings

positive readings at both 4mA and 20mA input levels. As shown in

Table 4’s ?rst three columns, a 4mA input can be 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 adjust-

ing R7 (Gain/Span Adjust).

Diff. Range

1. 800 to 1400

2. 500 to 800

3. 350 to 500

4. 250 to 350

5. 150 to 250

4mA

900

850

800

750

750

20mA

1700

1350

1150

1000

900

SW1

Off

On

Off

Off

On

SW2

Off

Off

On

Off

On

SW3

Off

Off

Off

On

On

SW4

NA

NA

NA

NA

NA

SW5*

OFF

OFF

OFF

OFF

OFF

The ‘Differential Range’ column in Table 4 lists the nominal dif-

ferential 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

* Setting SW5 to On will increase the differential range.

See example 2 below.

Examples (DMS-30LCDA-4/20P, Positive Reading)

for the majority of user applications. Higher differential ranges are

1. Desired display readings are:

ON

obtainable; however, the use of higher differential readings results

in correspondingly-lower positive readings with 4mA inputs, that

is, R3’s clockwise adjustment-range is reduced. Example #3 below

4mA ="650"

20mA = "950"

1

2

3

4

5

6

7

8

illustrates this point. Contact DATEL if there is any doubt as to

whether or not the DMS-30LCDA-4/20P can be con?gured for your

display-reading requirements.

The ?rst step when initially con?guring the DMS-30LCDA-4/20P, or

when selecting a new range, is to set R3 fully counterclockwise and

R7 fully clockwise (roughly 22 turns each) to their minimum offset

and minimum span positions, respectively.

Use DIP-switch setting #4 in Table 4 since subtracting 650 from 950

yields a differential value of 300. Apply 4mA and adjust R3 until the

display reads “000.” Apply 20mA and adjust R7 until the display

reads “300” (the differential value previously calculated). Apply 4mA

and adjust R3 until the display reads “650.” Apply 20mA and verify

that the display reads “950.”

ON

2. Desired display readings are:

The next step is to calculate the differential display-reading; this is

4mA =" 4.00"

1

2

3

4

5

6

7

8

accomplished by subtracting the desired 4mA display reading from

the desired 20mA display reading, disregarding decimal points. Then,

using the calculated differential display-reading to select the appro-

priate DIP-switch setting # from Table 4, con?gure DIP-switches

SW1, SW2, and SW3 accordingly. Please note, positions SW4 and

SW5 are not used in positive reading ‘P’ models. Also, make certain

that the DIP-switch’s small actuators are ?rmly engaged in their fully

ON or fully OFF positions.

The example below describes how to calibrate the meter for an

application which the DMS-30LCDA-4/20P easily accommodates:

displaying the output of a 4-20mA transmitter, that is, “04.0” with a

4mA input and “20.0” with a 20mA input.

1. Set R3 fully counterclockwise (minimum offset position) and R7 fully

clockwise (minimum differential span position), roughly 22 turns.

20mA = "19.99"

This example illustrates the DMS-30LCDA-4/20P’s capability to

display higher differential readings than those indicated in Table

4. This example also illustrates how the DMS-30LCDA-4/20P can

be used to display the output levels of a 4-20mA transmitter with

higher precision (0.01mA versus 0.1mA) than the example previ-

ously described.

Subtracting 400 from 1999 yields a differential of 1599, a value

not listed in Table 4. However, use DIP-switch setting #1 in Table

4 and enable SW5 since this setting has the highest overall offset/

span adjustment capabilities. Enable DP2 via SW7, then apply 4mA

and adjust R3 so the display reads “0.00.” Apply 20mA and adjust

R7 so the display reads “15.99.” Apply 4mA and adjust R3 until the

display reads “4.00.” Apply 20mA and check to see that the display

reads “19.99” or just overranges (“1—”). Repeat adjustment

procedure if necessary.

www.murata-ps.com/dpm

19 Jan 2011

email: sales@murata-ps.com

MPM_DMS30-LCDA.B05 Page 4 of 6

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

我的联系方式

*

*

*

相关PDF资料

DMS-30PC-1-RH-C DPM LED MINI 2VDC SUPER-BRIGHT

DMS-30PC-4/20S-24GS-I-C DPM LED 24V SUPPLY 3.5DIG GREEN

DMS-40LCD-0/1-5-C DPM LCD 200MV/2VDC 4.5DIGIT

DMS-40LCD-4/20S-C METER LCD SELF-POWERED 4.5DIG

DMS-40PC-1-RL-BCD-C DPM LED 2VDC 4.5DIG BCD LP RED

DMS-40PC-4/20S-24RS-I-C METER DISP LED 4.5DIG 24V RED

DMU-30ACV-1-DR-C VOLT METER LED 200ACV 0.1V RED

DMU-30DCV-2-DR-C VOLT METER LED 20DCV 0.01V RED

相关代理商/技术参数

DMS30PC 制造商:未知厂家制造商全称:未知厂家功能描述:3 1/2 DIGIT LED DISPLAY LOW POWER MINIATURE DIGITAL PANEL VOLTMETERS

DMS-30PC 制造商:MURATA-PS 制造商全称:Murata Power Solutions Inc. 功能描述:3? Digit, LED Display Low-Power, Miniature Digital Panel Voltmeters

DMS-30PC-0-AS 制造商:未知厂家制造商全称:未知厂家功能描述:3 1/2 DIGIT LED DISPLAY LOW POWER MINIATURE DIGITAL PANEL VOLTMETERS

DMS-30PC-0-AS-C 制造商:MURATA-PS 制造商全称:Murata Power Solutions Inc. 功能描述:3? Digit, LED Display Low-Power, Miniature Digital Panel Voltmeters

DMS-30PC-0-BS 功能描述:数字面板表 +/-200mV input .56" 3 1/2 digit blue 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-30PC-0-BS-C 功能描述:数字面板表 +/-200mV input .56’ 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-30PC-0-GL 功能描述:数字面板表 3.5 Digit +-200mV Low Power Grn 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-30PC-0-GL-C 功能描述:数字面板表 3.5 Digit +-200mV Low Power Grn 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