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DMS-30DR Series
Sunlight Readable, 3? Digit Panel Meters
Performance/Functional Speci?cations
Typical at T A = +25°C and supply voltage = +5V using the single-ended input circuit,
unless otherwise noted.
Ordering Information
with Auto-Dimming LED Displays
Analog Inputs
Min.
Typ.
Max.
Units
DMS-30DR- 1 - R - C
Full Scale Input Range:
Input Range:
RoHS Compliant
DMS-30DR-0
–
±200
–
mV
0 = ±200mV
DMS-30DR-1
DMS-30DR-2
DMS-30DR-3
–
–
–
±2
±20
±200
–
–
–
Volts
Volts
Volts
1 = ±2V
2 = ±20V
3 = ±200V
Accessories:
LED Color:
R = Red
Input Impedance:
–
DMS-EB-C
Multi-purpose (gain/offset, 4-20mA, etc.)
DMS-30DR-0, -1
100
1000
–
M Ω
DMS-EB-RMS-C
DMS-30-CP
For true rms measurements of ac voltages
Panel cutout punch
DMS-30DR-2, -3
Overvoltage Protection ?
Common Mode Voltage Range
CMRR (dc to 60Hz)
0.9
–
–
–
1
–
–
86
–
±250
±2
–
M Ω
Volts
Volts
dB
A panel-mount DMS-BZL2-C is supplied with each unit.
TECHNICAL NOTES
Control Inputs ?
1. External Brightness Adjustment (Pin 2): Pin 2 is internally con-
Decimal Point Placement (Pins 4-6)
Ext. Bright (Pin 2)
Performance
Sampling Rate
Accuracy (3 minute warm-up):
Tie to pin 3 to activate
See Technical Note 1
2.5 reading per second
nected to the high impedance input of an operational ampli?er that
ampli?es the output of the DMS-30DR’s ambient light sensor (ALS)
circuit. The output of this ampli?er varies the voltage that drives the
DMS-30DR’s LED display. Leave pin 2 open for standard auto-dim-
ming operation; in this mode, the ALS circuit will automatically adjust
the DMS-30DR’s LED brightness to compensate for changes in ambi-
DMS-30PC-0 (Vin = +0.19V)
DMS-30PC-1 (Vin = +1.9V)
DMS-30PC-2 (Vin = +19V)
DMS-30PC-3 (Vin = +190V)
Zero Reading (Vin = 0 Volts)
Temperature Drift (0 = +60°C)
+1.225V Reference Output (Pin 9) ?
–
–
–
–
“–001”
–
+1.215
±1
±1
±2
±2
“000”
±0.2
+1.225
±3
±3
±3
±3
“001”
±0.4
+1.235
Counts
Counts
Counts
Counts
Cnts/°C
Volts
ent lighting. As the ambient light striking the ALS increases, the LED
display’s brightness will also increase; a decrease in ambient light will
reduce the display’s brightness.
The ALS circuit’s output signal can be overdriven by applying an
externally generated voltage directly to pin 2. External drivers will see
approximately 600Kohms referenced to 5V RETURN. With pin 2 at
+0.7Vdc or below, the DMS-30DR’s LED display is off, and total cur-
rent drain from a nominal +5V supply is approximately 1mA. The LED
Power Supply Requirements
display’s brightness will increase from minimum to maximum as the
Supply Voltage
+4.75
+5.00
+5.25
Volts
voltage applied to pin 2 is varied from +0.8V up to +2.5V, respectively.
To enable continuous maximum display brightness, connect pin 2
Supply Current:
directly to pin 1 (+5V SUPPLY); in this con?guration the total current
Full Sunlight
Total Darkness
–
–
+150
3
+250
5
mA
mA
drain for the meter will be approximately 200mA.
2. Minimum-Intensity Adjustment Potentiometer: Users can adjust
Display
the DMS-30DR’s minimum LED brightness to suit their requirements
Display Type and Size
Polarity Indication
Overrange Indication
3? digit, 0.56"/14.2mm high LED
Autopolarity ("–" for negative Vin)
"–1_ _ _ " for negative inputs
"1_ _ _ " for positive inputs
by adjusting the ?-turn, rear-mounted intensity adjustment poten-
tiometer. Please note, this potentiometer will have minimal impact
on display brightness in high ambient light environments. See the
Mechanical Speci?cations section for potentiometer locations.
Physical/Environmental
Operating Temperature
Storage Temperature
Humidity (non-condensing)
0
–40
0
–
–
–
+60
+75
95
°C
°C
%
The intensity adjustment potentiometer is factory preset to its
mid-point position, producing a typical current drain of 7mA. At it’s
minimum and maximum positions, current drain is typically 3mA and
13mA, respectively. As viewed from the rear of the meter, with the
model number label facing up, turning the potentiometer clockwise
Case Material
Weight
Polycarbonate
0.75 ounces (21 grams)
increases the display’s intensity.
3. +1.225V REFERENCE OUTPUT (Pin 9): This pin is the output of the
? Applies for transient or continuous overvoltages applied to (+) INPUT HI (pin 11) with
(–) INPUT LO (pin 12) properly connected. Pin 12 is not overvoltage protected
(see Figure 1). Voltages applied to pin 12 should not exceed the supply voltage.
? See Technical Notes.
meter’s precision +1.225V internal reference IC. Pin 9 is referenced
to ANALOG COMMON (pin 10), which in turn sits approximately +2V
above pin 3. Pin 9 should be buffered if it’s used to drive external
loads since sourcing more than 15μA of current can affect both the
www.murata-ps.com/dpm
03 Aug 2010
email: sales@murata-ps.com
MPM_DMS-30DR.B05 Page 2 of 6
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