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
DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained
herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.
DMS-20PC-3-LM
Features
Actual Size
Self-Powered, LED Display
480V AC Line Monitor
Functional Specifications
Ordering Information
DS-0388B 1/99
DMS-BZL3
Optional Bezel
Self-powered, two-terminal operation
350 to 600Vac operating input range
Half-wave averaging, rms calibrated
Large, easy-to-read, bright red LED display
Rugged, epoxy-encapsulated construction
Built-in bezel for panel mounting
Reliable screw terminals for easy installation
Small 1.38" x 0.88" x 1.0" package
Input
Voltage Range
350-600Vrms (47-63Hz)
Current Consumption
50mArms (max.)
Performance
Sampling Rate
2.5 readings/second
Measurement Type
Half-wave average, rms calibrated
for sinusoidal input
Accuracy @ +25C
1V (typ.), 2V (max.)
Temperature Drift
(25 to +60C)
0.15 Volts/C (max.)
Mechanical
Dimensions
1.38" x 0.88" x 1.00"
Display Type
3 digit, red LED, 0.37"/9.4mm
Weight
1 ounce (28 grams)
Case Material
Polycarbonate
Environmental
Operating Temperature
25 to +60C
Storage Temperature
40 to +75C
Humidity (Non-condensing)
0 to 95%
DATEL's DMS-20PC-3-LM is a low-cost, self-powered, 2-wire digital
voltmeter designed for monitoring 480Vac 3-phase primary power. The DMS-
20PC-3-LM's unique power-supply design allows a single model to operate
from 350 to 600Vac (47-63Hz). The meter requires
no external components or auxiliary power for full
operation! Its large, 0.37"/9.4mm, bright red LED
display is easily readable under virtually all lighting
conditions.
DMS-20PC-3-LM employs rms calibrated, half-
wave sinusoidal averaging to achieve a display
resolution of 1Vac over its full operating range.
Packaged in a subminiature (1.38" x 0.88" x 1.0")
red-filter case with a built-in bezel, the meter is epoxy
encapsulated for ruggedness. An optional bezel
assembly, featuring metal fasteners, simplifies
panel mounting.
This easy-to-use, vibration-proof voltmeter is
the ideal digital upgrade for fragile analog-style
panel meters in 480Vac power distribution equipment.
It similarly excels in any new application requiring accurate,
high-voltage, ac line monitoring.
Mechanical Specifications
Dimensions in inches (millimeters)
Tolerances:
2 PL Dec 0.02 (0.51)
3 PL Dec 0.010 (0.254)
Recommended panel cutout dimensions:
1.336 (33.93)W 0.838 (21.29)H
Internal corner radii 0.032 (0.81) Max.
Operation and accuracy at inputs above or below this
range are not specified.
DMS-20PC-3-LM
350-600Vac line monitor with screw
terminals and screws
DMS-20-CP
Panel cutout punch
DMS-BZL3
Panel mount bezel
DMS-BZL4
Panel mount bezel with sealing gasket
Brass screws (6-32 thread) and a panel-mount retaining clip are
supplied with each meter
Typical panel mount
installation
Suggested wiring
(User supplied)
DM
S-20P
C-3-
LM
0.75
(19.1)
#6-32
UNC THD
0.44
(11.2)
0.80
(20.3)
0.32
(8.1)
0.04
(1.016)
0.88
(22.4)
1.00
(25.4)
0.04
(1.016)
0.04
(1.016)
1.30
(33.0)
1.38
(35.1)
0.19
(4.8)
1.28
(32.5)
0.10
(2.5)
1.07
(27.2)
0.10
(2.5)
#2-56 INSERT
0.156 (3.96) DEEP
1.63 (41.4)
1.83 (46.5)
0.37
(9.4)
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