DATEL DMS-EB-LP, DMS-EB-HTB, DMS-EB, DMS-EB-TCK, DMS-EB-TCJ Datasheet

DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: [phone] Fax: [phone] • Email: [e-mail] • Internet: www.datel.com

Features

Figure 1. DMS-30PC Series Simplified Schematic

The DMS-30PC Series is a broad line of self-contained, fully operational, 3½
digit voltmeters with large, easy-to-read LED displays. The 0.56"(14.2mm) high
LED's are available in a wide variety of colors including red, orange, amber, yellow,
green, aqua, blue-green, and super-blue. A high-intensity version of the red display is
optional, as are low-power versions of the red, orange, and green displays.

The small size (2.17" x 0.92" x 0.56") of DMS-30PC meters is achieved by
integrating their display, display drivers, reference circuit, and A/D converter into in a
single, epoxy-encapsulated assembly. The device's 12-pin, component-like, DIP
package is both vibration and moisture proof. Each package incorporates a built-in
color filter and bezel and is easily mounted in either panels or pc cards.

These meters are available in four differential input voltage ranges (±200mV,
±2V, ±20V and ±200V). Input impedance is 1,000 megohms for the ±200mV and
±2V inputs and 1 megohm for the ±20V and ±200V inputs. CMRR for all devices is
86dB, and inputs are overvoltage protected to ±250V.

Each meter incorporates an extremely stable, double-regulated reference and is
fully calibrated prior to potting. We guarantee outstanding initial accuracy (±1 count)
and excellent stability (±0.15 counts/°C). All models operate from a single +5V
supply, and the low-power models draw as little as 10mA (50mW total power). A
DISPLAY TEST function is standard on each device.

For popular applications (4-to-20mA, rms-to-dc conversion, ac line power, J and
K thermocouples, etc.), the DMS-30PC Series includes a complete line of optional
"plug-on" application boards that conveniently convert your meter into an applica­tion-specific instrument.

• Large (0.56"/14.2mm) LED display

• 8 LED colors

• Low-power LED’s optional

• Epoxy-encapsulated, 12-pin DIP with

built-in color filter and bezel

• Miniature size:

2.17" x 0.92" x 0.56"
55mm x 23mm x 14mm

• Panel or pc-board mountable

• 4 differential input voltage ranges

• Auto-calibration, ±1 count accuracy

• User-selectable decimal point placement

• Single +5V supply (60mW for low-power

models)

• 0 to +60°C temperature range

• Numerous "plug-on" application boards

• Low cost

Actual Size

3½ Digit, LED Display

Low-Power, Miniature

Digital Panel Voltmeters

DMS-30PC Series

® ®

+1.23V

REFERENCE OUT

(+) INPUT HI

(–) INPUT LO

ANALOG
COMMON

REFERENCE OUT

REFERENCE IN

+5V SUPPLY

R1

DP 1

DP 2

DP 3

6

5

4

9

11

12

10

8

7

1

3

DC/DC

CONVERTER

2

DISPLAY TEST

5V RETURN

+5V

–5V

+5V

1.23V
REF.

R2

+2.0V

DATA

909k

R2 is not used on ±200mV (-0) models or ±2V (-1) models.
R2 = 100k on ±20V (-2) models and 9.1k on ±200V (-3) models.

V+

V–

A/D

CONVERTER

0 Vdc

0.01µF

1.82k

≈

NEW!

Super-Bright Blue
and Blue-Green LED Models

•

•

2

Performance/Functional Specifications

Typical at TA = +25°C and supply voltage = +5V using the single-ended input circuit,
unless otherwise noted.

DMS-30PC

3½ DIGIT, LED DISPLAY DIGITAL PANEL VOLTMETERS

DMS-30 PC - 1 - RS

LED Color:

AS = Standard Amber
BS = Super Blue
GS = Standard Green
OS = Standard Orange
QS = Standard Aqua
RS = Standard Red
YS = Standard Yellow
RH = High-Intensity Red
GL = Low-Power Green
OL = Low-Power Orange
RL = Low-Power Red
VFS = Blue-Green

Technical Notes

1. +1.23V REFERENCE OUTPUT (Pin 9): This pin is the output of the
meter’s precision +1.23V internal reference, and it is referenced to
ANALOG COMMON (pin 10) which sits at a potential of approxi­mately +2V. This output should be buffered if used to drive external
loads since sourcing more than 15µA from pin 9 can affect both the
initial accuracy and temperature drift of the meter.

2. ANALOG COMMON (Pin 10): This pin is connected to an internal,
low-noise, "relative" ground. It is used in certain differential and
"floating" measurements as described in the Applications section of
this data sheet and Ap Note 3 of the DATEL Panel Meter Catalog.

Pin 10 should not be connected to pin 3 (5V RETURN) or to your
system’s analog ground.

3. REFERENCE OUTPUT (Pin 8) and INPUT (Pin 7): Pin 8 is a

precision reference actively trimmed at the factory. In normal
operation, pin 8 must be tied to pin 7 to achieve all listed accuracy
and drift specifications.

Accessories:

DMS-30-CP Panel cutout punch
DMS-BZL1 DMS-30 bezel assembly
DMS-BZL2 DMS-30 bezel assembly with sealing gasket
RN-DMS Gain/offset potentiometer kit for DMS-EB,

DMS-EB-AC/DC and DMS-EB-DC/DC

Add-On Application Boards:

DMS-EB Multi-purpose (gain/offset, 4-20mA, etc.)
DMS-EB-HTB High-accuracy temperature probe sensing for

±200mV models

DMS-EB-DC/DC Provides isolated +5V power
DMS-EB-TCJ J-type thermocouple inputs for ±2V models
DMS-EB-TCK K-type thermocouple inputs for ±2V models
DMS-EB-RMS For true rms measurements of ac voltages
DMS-EB-AC/DC For ac line-powered applications
DMS-EB-LP For 4-to-20mA loop-powered applications

Input Range:

0 = ±200mV
1 = ±2V
2 = ±20V

3 = ±200V Available on the

following models only:

-BS (Super Blue)

-GS (Standard Green)

-RS (Standard Red)

-RL (Low-Power Red)

-VFS (Blue-Green)

Ordering Information

➀ 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.

➁ See Technical Notes.

A panel-mount retaining clip is supplied with each model.

Analog Inputs Min. Typ. Max. Units

Full Scale Input Range:

DMS-30PC-0 -- ±200 -- mV
DMS-30PC-1 -- ±2 -- Volts
DMS-30PC-2 -- ±20 -- Volts
DMS-30PC-3 -- ±200 -- Volts

Input Impedance:

DMS-30PC-0, -1 100 1000 -- M Ω
DMS-30PC-2, -3 0.8 1 -- MΩ

Overvoltage Protection ➀ -- -- ±250 Volts
Common Mode Voltage Range -- -- ±2 Volts
CMRR (dc to 60Hz) -- 86 -- dB
Control Inputs ➁
Decimal Point Placement (Pins 4-6) Tie to pin 3 to activate
Display Test (Pin 2) Tie to +5V to activate all segments

Performance

Sampling Rate 2.5 samples per second
Accuracy (3 minute warm-up):

DMS-30PC-0 (VIN = +0.19V) -- ±1 ±2 Counts
DMS-30PC-1 (VIN = +1.9V) -- ±1 ±2 Counts
DMS-30PC-2 (VIN = +19V) -- ±2 ±3 Counts
DMS-30PC-3 (VIN = +190V) -- ±2 ±3 Counts

Zero Reading (VIN = 0 Volts) "–001" "000" "001"
Temperature Drift (0 to +60°C) -- ±0.15 ±0.3 Cnts/°C
+1.23V Reference Output (Pin 9) ➁ +1.20 +1.23 +1.25 Volts

Power Supply Requirements

Supply Voltage +4.75 +5.00 +5.25 Volts
Supply Current:

Standard Models -- +150 +225 mA
Low-Power Models:

Red display -- +12 +17 mA
Green or orange display -- +60 +100 mA

Display

Display Type and Size 3½ Digit LED, 0.56"/14.2mm high
Polarity Indication Autopolarity ("–" for negative VIN)
Overrange Indication "–1___" for negative VIN

"1___" for positive VIN

Physical/Environmental

Operating Temperature 0 -- +60 °C
Storage Temperature –40 -- +75 °C

Humidity (Non-condensing) 0 -- 95 %
Case Material Polycarbonate
Weight 0.75 ounces (21 grams)

Order on-line at www.datel.com