DMS-40PC Voltmeters Datasheet

DMS-40PC Datasheet PDF, Equivalent


Part Number

DMS-40PC

Description

LED Display Precision / Miniature Digital Panel Voltmeters

Manufacture

Datel

Total Page 6 Pages
Datasheet
Download DMS-40PC Datasheet


DMS-40PC
www.datel.com
®®
DMS-40PC Series
Actual Size
4½ Digit, LED Display
Precision, Miniature
Digital Panel Voltmeters
Features
Precision, autozeroing, factory-
calibrated A/D converter
Scientific-grade accuracy, ±2 counts
Miniature size:
2.17" x 0.92" x 0.56"
55mm x 23mm x 14mm
Large (0.52"/13.2mm) LED display
Choice of red, green or yellow colors
High-intensity or low-power red
LED's optional
Single +5V supply (175mW for low-
power models)
Epoxy-encapsulated, 12-pin DIP with
built-in color filter and bezel
3 differential input voltage ranges
DISPLAY HOLD and TEST functions
Optional BCD data outputs for CPU
interface
0 to +50°C temperature range
DMS-40PC Series, 4½ Digit, LED Display, Miniature DPM's are fully self-contained,
component-like, plug-in meters that provide scientific-grade accuracy (typically ±2
counts or ±0.005% of full scale) and outstanding reliability at a very affordable price.
Within its miniature (2.17" x 0.92" x 0.56"), epoxy-encapsulated package, each
meter contains a precision reference circuit; a high-resolution, autozeroing, factory-
calibrated A/D converter; and a large (0.52"/13.2mm), easy-to-read, LED display.
LED's are available in red, yellow and green colors. Red LED's are also offered in
high-intensity or low-power versions.
The versatile design of the DMS-40PC Series assures trouble-free installation and
long-term operation. Differential input voltage ranges include ±2V, ±20V and ±200V.
Input impedance is a minimum 800k. Non-inverting inputs are overvoltage protected
to ±250V, and CMRR is typically 86dB (dc to 60Hz).
The DMS-40PC's epoxy-encapsulated package has an integral bezel and color
filter. The moisture and vibration-proof package is extremely rugged and well suited for
harsh environments and extended temperatures. Devices are fully specified for
0 to +50°C operation.
All models operate from a single +5V supply and typically consume 500mW. Low-
power models, whose display is just as bright as standard models, typically consume
175mW. DISPLAY TEST and HOLD functions are standard on each meter, and a
complete set of BCD outputs are optional for sending data to CPU's or remote
displays.
1
+5V SUPPLY
2
DISPLAY TEST
3
5V RETURN
4
DP 3
5
DP 2
6
DP 1
+5V
V+
DC/DC
CONVERTER
–5V
V–
0 Vdc
A/D
CONVERTER
DATA
0.01µF
1
R2
12
(–) INPUT LO
R1
909k
11
(+) INPUT HI
10 ANALOG
COMMON
2.5V
REF.
9
DISPLAY HOLD
8
DP4
+5V
7
REFERENCE IN/OUT
1 R2 is not used on ±2V (-1) models.
R2 = 101k on ±20V (-2) models and 9.2k on ±200V (-3) models.
Figure 1. DMS-40PC Series Simplified Schematic
DATEL, Inc., Mansfield, MA 02048 (USA) Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 Email: sales@datel.com Internet: www.datel.com

DMS-40PC
DMS-40PC
4½ 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
Performance/Functional Specifications
Typical at TA = +25°C and supply voltage = +5V using the single-ended input circuit,
unless otherwise noted.
Analog Inputs
Full Scale Input Range:
DMS-40PC-1
DMS-40PC-2
DMS-40PC-3
Input Impedance:
DMS-40PC-1
DMS-40PC-2, -3
Overvoltage Protection
Common Mode Voltage Range
CMRR (dc to 60Hz)
Control Inputs
Decimal Point Placement (Pins 4-6, 8)
Display Test (Pin 2)
Display Hold (Pin 9)
BCD Outputs
Logic levels (1 LSTTL load max.):
Logic "1"
Logic "0"
Performance
Sampling Rate
Accuracy (15 minute warm-up):
DMS-40PC-1 (VIN = +1.9V)
DMS-40PC-2 (VIN = +19V)
DMS-40PC-3 (VIN = +190V)
Zero Reading (VIN = 0 Volts)
Temperature Drift (0 to +50°C):
DMS-40PC-1
DMS-40PC-2, -3
Power Supply Requirements
Supply Voltage
Supply Current:
Standard Models
Low-Power Models
Display
Display Type and Size
Polarity Indication
Overrange Indication
Physical/Environmental
Operating Temperature
Storage Temperature
Humidity (Non-condensing)
Case Material
Weight
Min. Typ. Max. Units
-- ±2 -- Volts
-- ±20 -- Volts
-- ±200 -- Volts
100 1000
0.8 1
--
--
M
M
-- -- ±250 Volts
-- -- ±2 Volts
-- 86 -- dB
Tie to pin 3 to activate
Tie to pin 3 to activate all segments
Tie to pin 3 to hold last reading
+2.4 --
-- Volts
-- +0.4 +0.8 Volts
2.5 samples per second
--
--
--
"– 0001"
±2
±3
±3
"0000"
±3
±4
±4
"0001"
Counts
Counts
Counts
-- ±0.4 ±1 Cnts/°C
-- ±0.4 ±1.5 Cnts/°C
+4.75
--
--
+5.00 +5.25
+100 +140
+35 +50
Volts
mA
mA
4½ Digit LED, 0.52"/13.2mm high
Autopolarity ("–" for negative VIN)
"– 0000" (flashing) for negative VIN
"0000" (flashing) for positive VIN
0 -- +50 °C
–20 -- +75 °C
0 -- 95 %
Polycarbonate
0.75 ounces (21 grams)
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.
BCD outputs are optional and must be specified in the part number.
See Ordering Information.
Includes high-intensity and BCD-output models.
Order on-line at www.datel.com
Ordering Information
DMS-40PC - 1 - R S
Input Range:
1 = ±2V
2 = ±20V
3 = ±200V
LED Color:
GS = Standard Green
RH = High-Intensity Red
RL = Low-Power Red
RS = Standard Red
YS = Standard Yellow
BCD Output Models:
BCD outputs are only available on standard red meters.
DMS-40PC-1-RS-BCD for ±2V input range
DMS-40PC-2-RS-BCD for ±20V input range
DMS-40PC-3-RS-BCD for ±200V input range
DMS-40PC-1-RL-BCD for ±2V input range
DMS-40PC-2-RL-BCD for ±20V input range
DMS-40PC-3-RL-BCD for ±200V input range
Accessories:
DMS-PS1-CM
DMS-30-CP
DMS-BZL1
DMS-BZL2
DMS-EB
+5V/1.0A AC/DC power supply module
Panel cutout punch
DMS-40 bezel assembly
DMS-40 bezel assembly with sealing gasket
Application/evaluation board with standard
MOLEX connector, decimal point solder pads
and attenuation resistor pads.
A panel-mount retaining clip is supplied with each model.
Technical Notes
1. ANALOG COMMON (Pin 10): This pin is an internal, low-noise
ground for the DMS-40PC. It is internally connected to pin 3
(5V RETURN). Do not connect pin 10 to either pin 3 or your
system ground as this will create a ground loop and possibly result
in erroneous readings.
2. REFERENCE INPUT/OUTPUT (Pin 7): This pin accesses the
meter's internal reference 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" applications in which it is
desirable for the meter’s reference to track an external reference.
See Ap Note 3 in the DATEL Panel Meter Catalog for more details.
3. DISPLAY TEST (Pin 2): Connecting pin 2 to ground (pin 3, 5V
RETURN) will activate all LED segments, and the display will read
"–18888" regardless of the actual applied input. To reduce self-
heating, the display should not be left in the "test" mode for
more than 10 seconds. This pin should be left open if unused.
4. DISPLAY HOLD (Pin 9): For normal operation, this pin should be
left open. To hold the meter’s last reading and display it continu-
ously, tie pin 9 to ground (pin 3, 5V RETURN).
5. Decimal Point Placement: The location of the decimal point is
user-selectable, and the decimal point control pins (DP1-DP4) are
active low functions. Select the appropriate decimal point by tying
pin 4, 5, 6 or 8 to pin 3 (5V RETURN). Unused decimal point
location pins should be left open.
2


Features ® ® www.datel.com DMS-40PC Series A ctual Size 4½ Digit, LED Display Prec ision, Miniature Digital Panel Voltmete rs Features • Precision, autozeroing , factorycalibrated A/D converter • S cientific-grade accuracy, ±2 counts Miniature size: 2.17" x 0.92" x 0.56" 55mm x 23mm x 14mm • Large (0.52"/13 .2mm) LED display • Choice of red, gr een or yellow colors • High-intensity or low-power red LED's optional • Si ngle +5V supply (175mW for lowpower mod els) • Epoxy-encapsulated, 12-pin DIP with built-in color filter and bezel 3 differential input voltage ranges • DISPLAY HOLD and TEST functions • Optional BCD data outputs for CPU inte rface • 0 to +50°C temperature range DMS-40PC Series, 4½ Digit, LED Displ ay, Miniature DPM's are fully self-cont ained, component-like, plug-in meters t hat provide scientific-grade accuracy ( typically ±2 counts or ±0.005% of ful l scale) and outstanding reliability at a very affordable price. Within its miniature (2.17" x 0.92" x 0.56"), epoxy-encapsulated pack.
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