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参数资料
| 型号： | DMS-20RM-2-AC1-R-C |
| 厂商： | Murata Power Solutions Inc |
| 文件页数： | 2/4页 |
| 文件大小： | 0K |
| 描述： | AC VOLTMETER 200V RANGE AC POWER |
| 产品培训模块： | DMS-20RM Series |
| 产品目录绘图： | Digital Panel Meter |
| 特色产品： | DMS-20RM Series AC Voltmeters |
| 标准包装： | 12 |
| 系列： | DMS-20RM |
| 类型： | 伏特表 |
| 测量范围： | 0 ~ 199.9VAC |
| 显示器样式： | 红色字符，黑色背景 |
| 显示器类型： | LED |
| 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 |
| 电源电压： | 85 ~ 264VAC |
| 产品目录页面： | 2856 (CN2011-ZH PDF) |
| 其它名称： | 811-1985 |
DMS-20RM Series
True-rms ac Voltmeters with Isolated Inputs
Performance/Functional Speci?cations
Typical at TA=+ 25oC with 60Hz sine-wave input, unless otherwise noted
ORDERING INFORMATION
Full-Scale Input Voltage (TB2)
DMS-20RM-1
DMS-20RM-2
Min.
0
0
Typ.
—
—
Max.
19.99
199.9
Units
Vac
Vac
DMS-20RM-1-AC1-R-C
DMS-20RM-2-AC1-R-C
DMS-20RM-3-AC1-R-C
0 to 19.99Vac, AC Powered
0 to 199.9Vac, AC Powered
0 to 300Vac, AC Powered
DMS-20RM-3
Frequency Range
Performance
Sampling Rate
Accuracy ?
0
47
— 300
60 1000
2.5 reading per second
±0.4%FS ±2 counts
Vac
Hz
DMS-20RM-1-DC2-R-C 0 to 19.99Vac, DC Powered
DMS-20RM-2-DC2-R-C 0 to 199.9Vac, DC Powered
DMS-20RM-3-DC2-R-C 0 to 300Vac, DC Powered
A DMS-BZL4-C bezel assembly with sealing gasket is supplied with each meter.
with 60Hz sine wave input
Measurement Type
rms responding, Crest Factors of 1-5
IMPORTANT! To ensure safe and reliable operation, DMS-20RM ac
Temperature Drift (0 to 60oC)
±0.2
±0.4
Counts/oC
voltmeters must be installed and serviced by quali?ed technical personnel.
Contact Murata Power Solutions if there is any doubt regarding installation
Zero-Volt Reading (within 30 sec.)
Breakdown Voltage, TB1 to TB2
Input Impedance
DMS-20RM-1
DMS-20RM-2
DMS-20RM-3
Power Supply Voltage (TB1)
DMS-20RM-X-AC1
DMS-20RM-X-DC2
Power Supply Current (TB1, ? )
DMS-20RM-X-AC1
DMS-20RM-X-DC2
-001
2000
—
—
—
85
+10.0
—
—
000
—
20
200
266
—
—
30
10
001
—
—
—
—
264
+40.0
50
15
Counts
Vdc
kΩ
kΩ
kΩ
Vac/47-63Hz
Vdc
mA/47-63Hz
mAdc
and/or operation.
TECHNICAL NOTES
1. Measurement Type: DMS-20RM series ac voltmeters employ a preci-
sion rms-to-dc converter and a high-precision voltage reference to
measure and display the rms value of complex ac waveforms. Please
note, the rear-mounted potential transformer is used to isolate the
input signal being measured (TB2) from the ammeter’s operating power
source connected to TB1. Do not pass any conductors through this
transformer’s center hole as this will introduce signi?cant measure-
ment errors.
2. Wiring: All power supply and input signal wiring must be rated for the
voltages and currents they will carry and must comply with any code
or application-mandated requirements pertaining to the user’s speci?c
Terminal Block Wiring (TB1 and TB2)
installation.
Wire Size
Insulation Strip Length
Screw Tightening Torque
Rated Voltage
Display
Display Type and Size
Overrange Indication
Decimal Point
16-22AWG, Solid or stranded
0.250 inches
2.2 lb·in (0.25 N·m) ±20%
300Vac
3? Digit LED, 0.37”/9.4mm high
“1___”
Fixed, model dependent (see full-scale input
voltage above)
3. Power Supply Polarity, Fusing, and Grounding: As shown in Figures
1A, 1B, and 2, the two power supply inputs, TB1-A and TB1-B, on
ac-powered DMS-20RM voltmeters (“-AC1” suf?x) are not polarity
sensitive, that is, they have no “AC LO” or “AC HI” designations. Also,
ac-powered models do not include or require a connection to earth/
chassis ground. DC-powered models (“-DC2” suf?x) are reverse-polarity
protected, and must be connected as shown in Figure 2 for proper
operation.
DMS-20RM voltmeters are not internally fused. Terminal block TB1 is to
be used only for powering the power meter’s internal circuitry; it must
not be used to supply power to external loads. The supply wires feeding
Physical/Environmental
Operating Temperature
Storage Temperature
Humidity (non-condensing)
-25
-40
0
—
—
—
+60
+75
85
oC
oC
%
these power meters must be fused with a 0.25A/250V time delay/time
lag fuse, in accordance with applicable regulatory codes.
Wire insulation must be stripped to within ±10% of the stated dimen-
sions, and wires should be inserted into TB1 such that their insulation
is not pinched by the screw terminal. See the Functional Speci?cations
Dimensions
Weight:
Model dependent; see product datasheet.
1.3 Ounces (36 grams) nominal
section of this data sheet for wire sizes and tightening torque for TB1’s
screw terminals.
4. Calibration: Periodic recalibration of DMS-20RM voltmeters is not
required under normal, indoor operating environments. If calibration is
necessary, it should only be performed by quali?ed technical personnel.
Calibration is performed with potentially lethal voltages applied to the
DMS-20RM and its associated wiring. A plastic, fully-insulated adjust-
? Speci?ed accuracy applies to inputs with crest factors (CF) up to 2.0, where CF = Vpeak/Vrms.
Crest factors of 2 to 5 introduce an additional error of ±3% of full scale. Voltmeters are calibrated
with a near full-scale, 60Hz sine-wave input.
? Speci?ed maximum power supply currents are steady state; larger surge currents can occur at
initial application of power.
ing tool must be used to access the recessed calibration potentiometer
located on the back of the unit (see Mechanical Speci?cations). Contact
Murata Power Solutions if additional information is required regarding
calibration, setup, or any other technical issue pertaining to DMS-20RM
ac voltmeters.
www.murata-ps.com/dpm
email: sales@murata-ps.com
MPM_DMS-20RM.A06 Page 2 of 4
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