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DMS-40LCD Series
4? Digit, LCD Display Digital Panel Voltmeters
3. Low Battery Annunciator: The “BAT” annunciator in the upper left-hand
corner of the display turns on when the supply voltage for 5V-powered
models falls below the approximate range of 2.7V to 3.7V, or when the
supply voltage for 9V-powered models falls below the approximate range of
5.4 to 7.2V. This function can not be disabled.
Please note, the “BAT” annunciator is a convenience feature only. The supply
8. Soldering Methods: All models in the DMS-40LCD Series easily withstand
most common wave soldering operations. We recommend, however, you
evaluate the effects your particular soldering techniques may have on the
meter’s plastic case and high-precision electrical performance. We recom-
mend the use of no-clean solders.
9. Suggested Mating Connectors:
voltage ranges speci?ed previously in the ‘Performance/Functional Speci?ca-
tions’ section of this data sheet must be maintained at all times in order to
ensure the DMS-40LCD meets its accuracy and stability speci?cations.
4. HOLD/BACKLIGHT (Pin 9) Function: For non-backlit models, connecting
pin 9 (HOLD/BACKLIGHT) to pin 3 (5V RETURN/
–BATTERY) will hold (continuously display) the last reading.
If not used, pin 9 should be left open for these models.
For backlit models, grounding pin 9 (i.e. connecting it to pin 3) turns on the
backlighting LED’s. 9V-powered backlit models function with supply voltages
up to +14V, however, activating the backlight with voltages greater than
9.2V can damage the meter. Therefore, a 1/4 Watt series resistor must be
installed between pins 3 and 9 in these situations. The value of the series
resistor is determined using the following formula:
Panel mounted:
Connector housing
Terminal type
Crimping tool
Wire size
Insulation diameter
Stripping length
Board mounted:
Socket
APPLICATIONS
DATEL P/N 4320-01069-0
DATEL P/N 4400-01032-0
DATEL P/N 39-2099000
22 to 26 AWG
0.062 ” (1.57mm) maximum
0.100 to 0.125 ” (2.54 to 3.17mm)
DATEL P/N 4320-01074-0
R Series =
+BATTERY – 9.2V
0.035
Ohms
DMS-40LCD meters are available in either 5V-powered or 9V-powered models.
9V devices operate directly from 7.5V to 14V supplies (usually batteries) without
Example: If +BATTERY (pin 1 with respect to pin 3) is +12.6V,
the need for external voltage regulators. 9V devices, however, can not be used
to measure voltages referenced to the negative battery terminal (pin 3) because
R Series =
+12.6 – 9.2V
Ohms
the minus input to the meter (pin 12, (–) INPUT LO) must always be at least
1.5V above pin 3. 9V-powered meters can only be used to make differential and
0.035
R Series = 97 Ohms
In any backlit application, including those with supply voltages
< 9.2V, the current drawn by the backlight (and therefore the current drawn
by the meter) can be reduced by installing a 1/4 Watt resistor between pins 3
and 9. The brightness of the backlight will be reduced proportionately.
5. ANALOG COMMON (Pin 10): This pin is connected to an internal, low-
noise, “relative” ground. It is used in certain “?oating” measurements as
described in the Applications section of this data sheet and Ap Note 3 of the
not single-ended measurements.
5V-powered devices operate from any well-regulated +5V supply and will ac-
curately measure voltages both above and below pin 3 (5V RETURN) in either
single-ended or differential con?gurations.
1. Single-Ended Input Con?gurations: True single-ended measurements
can only be made with 5V-powered meters. The circuit of Figure 2 avoids
problems normally associated with ground loop currents. Separate ground
runs should be used for 5V RETURN (pin 3) and (–) INPUT LO (pin 12).
DATEL Panel Meter Catalog. Pin 10 should not be connected to pin 3 (5V
RETURN/–BATTERY) or to your system’s analog ground.
6. REFERENCE IN/OUT (Pin 7): This pin accesses the meter’s internal refer-
+
11
(+) IN HI
DMS-40LCD-0/1-5
ence and is used during the factory calibration procedure. Pin 7 should be
left open in most common applications. It can be used in certain “ratiometric”
–
V IN
12
(–) IN LO
applications in which it is desireable for the meter’s reference to track an
external reference. See the Applications section of the DATEL Panel Meter
1
+5V SUP
2
RANGE
6
DP1
3
5V RET
Catalog for more details.
7. Gain Adjust: There is a gain-adjust potentiometer on the back of each
meter. It has approximately ±150 counts of adjustment range. Since
these devices essentially have no zero/offset errors, a gain adjustment is
effectively an overall accuracy adjustment. Though they may be performed
at any point (except zero), accuracy adjustments are most effective when
performed with higher level input signals.
120 VAC
AC to DC Converter
Figure 2. Single-Ended Input Con?guration
(5V-Powered Models)
www.murata-ps.com/dpm
04/05/11
email: sales@murata-ps.com
MPM_DMS40LCD.C04 Page 3 of 6
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相关代理商/技术参数
DMS-40LCD-0/1-9
功能描述:数字面板表 4.5 Digit Volt Meter +-200mVto+-2V / +9V 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-40LCD-0/1-9B
功能描述:数字面板表 4.5 Digit Volt Meter +-200mVto+-2V / +9V 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-40LCD-0/1-9B-C
功能描述:数字面板表 4.5 Digit Volt Meter +-200mVto+-2V / +9V 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-40LCD-0/1-9-C
功能描述:数字面板表 4.5 Digit Volt Meter +-200mVto+-2V / +9V 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-40LCD-1/2-5
功能描述:数字面板表 4.5 Digit Volt Meter +-2Vto+-20V / +5V 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-40LCD-1/2-5B
功能描述:数字面板表 4.5 Digit Volt Meter +-2Vto+-20V / +5V 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-40LCD-1/2-5B-C
功能描述:数字面板表 4.5 Digit Volt Meter +-2Vto+-20V / +5V 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-40LCD-1/2-5-C
功能描述:数字面板表 4.5 Digit Volt Meter +-2Vto+-20V / +5V 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