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參數(shù)資料
| 型號(hào)： | DMS-30PC-3-OS |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 3 1/2 DIGIT LED DISPLAY LOW POWER MINIATURE DIGITAL PANEL VOLTMETERS |
| 中文描述： | 3 1 / 2位LED顯示小功率微型數(shù)字面板電壓表 |
| 文件頁(yè)數(shù)： | 4/6頁(yè) |
| 文件大?。?/td> | 155K |
| 代理商： | DMS-30PC-3-OS |
4
DMS-30PC
3 D I G I T, L E D D I S P L AY D I G I TA L PA N E L V O LT M E T E R S
Figure 3. Differential Input Configuration
R2
R1 + R2
x V
IN
= Reading
50k
< R1 + R2 < 10M
Figure 6. Floating Input Measurements
(Alternate Configuration)
Figure 5. Floating Input Measurements
Figure 4. Input Attenuation Circuit
Connecting pin 10 (ANALOG COMMON) or pin 3 (5V RETURN)
to (–) INPUT LO (pin 12) provides the reference point for the
meter's input.
A "floating" input is a signal that has no galvanic connection to
the meter's power supply. In the figures below the 1.5V battery
illustrates a true floating input.
R
Shunt
= R1 = V
Fsr
/I
Fsr
Where:
V
Fsr
= Full scale reading (in Volts)
I
Fsr
= Relative full scale current (in Amps)
5. Process Control (4-to-20mA) Measurements:
In many
common process-control applications, a 4-to-20mA current loop
is used to transmt information. Because DMS-30PC meters have
such high input impedance, a simple shunt resistor across the
meter's input can be used to convert the loop current to a voltage.
See Figure 7. The value of the shunt resistor is a function of the
scaling requirements of the particular application and can be
calculated using the following equation:
Applications
2. Differential Input Configurations:
Differential measurements
can be made with all DMS-30PC meters. Figure 3, though not a
practical real-world application, uses a voltage divider to
demonstrate the concept of a differential input signal. Be careful
not to exceed the ±2V common mode voltage limtation for 5V-
powered meters.
3. Engineering Scaling:
For measuring voltages greater than the
full scale input range of a given meter, the input signal must be
attenuated. A simple voltage divider (simlar to that shown in
Figure 4) will scale the input to within the range of the selected
meter. R1 and R2 should be precision, ±1%, metal-filmresistors
with absolute TCR's less than 50ppm/°C. See Ap Note 4 for more
information on engineering scaling.
4. Floating Signal Source Measurements:
Floating signals can
be measured using the circuits shown in Figures 5 and 6.
1
12
(–) IN LO
3
5V RET
+5V SUP
DATEL
UPA-5/500
120 VAC
11
(+) IN HI
6
AC to DC Converter
R2
1k
R1
1k
R3
1k
8
7
REF IN
DP1
REF OUT
DMS-30PC-1
R2
11
12
(+) IN HI
(–) IN LO
V
IN
R1
+
–
1
3
5V RET
+5V SUP
DATEL
UPA-5/500
120 VAC
AC to DC Converter
8
REF OUT
7
REF IN
DMS-30PC-1
1
3
+5V SUP
5V RET
DATEL
UPA-5/500
120 VAC
6
DP1
AC to DC Converter
DMS-30PC-1
12
(–) IN LO
11
(+) IN HI
1.5V
CELL
+
–
8
REF OUT
REF IN
7
1
3
5V RET
6
DP1
12
(–) IN LO
10
ANA COMM
11
(+) IN HI
1.5V
CELL
+
–
8
REF OUT
7
REF IN
DMS-30PC-1
+5V SUP
DATEL
UPA-5/500
120 VAC
AC to DC Converter
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DMS-30PC-3-QS | 3 1/2 DIGIT LED DISPLAY LOW POWER MINIATURE DIGITAL PANEL VOLTMETERS |
| DMS-30PC-3-RH | 3 1/2 DIGIT LED DISPLAY LOW POWER MINIATURE DIGITAL PANEL VOLTMETERS |
| DMS-30PC-3-RL | 3 1/2 DIGIT LED DISPLAY LOW POWER MINIATURE DIGITAL PANEL VOLTMETERS |
| DMS-30PC-3-RS | 3 1/2 DIGIT LED DISPLAY LOW POWER MINIATURE DIGITAL PANEL VOLTMETERS |
| DMS-30PC-3-YS | 3 1/2 DIGIT LED DISPLAY LOW POWER MINIATURE DIGITAL PANEL VOLTMETERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DMS-30PC-3-OS-C | 制造商:MURATA-PS 制造商全稱(chēng):Murata Power Solutions Inc. 功能描述:3? Digit, LED Display Low-Power, Miniature Digital Panel Voltmeters |
| DMS-30PC-3-QS | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:3 1/2 DIGIT LED DISPLAY LOW POWER MINIATURE DIGITAL PANEL VOLTMETERS |
| DMS-30PC-3-QS-C | 制造商:MURATA-PS 制造商全稱(chēng):Murata Power Solutions Inc. 功能描述:3? Digit, LED Display Low-Power, Miniature Digital Panel Voltmeters |
| DMS-30PC-3-RH | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:3 1/2 DIGIT LED DISPLAY LOW POWER MINIATURE DIGITAL PANEL VOLTMETERS |
| DMS-30PC-3-RH-C | 制造商:MURATA-PS 制造商全稱(chēng):Murata Power Solutions Inc. 功能描述:3? Digit, LED Display Low-Power, Miniature Digital Panel Voltmeters |
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