DMS-20PC-1-LM
DATEL's DMS-20PC-1-LM is a component-size, self-contained, low-cost
ac voltmeter for true line measurements. It requires no additional components
or auxiliary power. Simply plug it into any wall outlet and instantly read
voltages from 85 to 264Vac (47-63Hz). The large (0.37"/9.4mm), bright red
LED display makes the DMS-20PC-1-LM easily readable under any lighting
conditions.
DMS-20PC-1-LM employs half-wave sinusoidal
averaging (rms calibrated) and has a
display resolution of 1Vac over its full input
range. Packaged in a red-filter case with
built-in bezel, the meter is fully encapsu-
lated for ruggedness. All units are overvolt-
age
protected to 300Vac.
This low-cost meter is ideal for industrial,
laboratory, office and field-service applications.
Its miniature size is perfect for design into high-
end consumer electronics, laboratory instru-
mentation and other products requiring accurate ac
line monitoring.
Functional Specifications
Ordering Information
Input
Voltage Range
85-264Vrms
Overvoltage Protection
300Vrms (Overvoltage category II)
Frequency Range
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"
DisplayType
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%
Self-Powered, 3 Digit, LED
AC Line Voltage Monitors
Features
Plugs directly into USA-style wall outlets
Screw terminals for panel mounting
Small 1.38" x 0.88" x 1.0" packages
Large, easy-to-read, red LED displays
Fully encapsulated for harsh environments
Half-wave averaging, rms calibrated
UL, CSA and IEC1010-1 certified
Very low cost!
DMS-20PC-1-LM
With threaded terminations and screws
DMS-20PC-1-LM-F
With blade terminals, factory installed
DMS-20PC-1-LM-R
With round terminals, factory installed
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
Actual Size
DS-0281B 1/99
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.
DMS-BZL3
Optional Bezel
Operation and accuracy at inputs above or below these
ranges are not specified.
DMS-20PC-1-LM-F
(With blade terminals)
Other NEMA
configurations
available on
request
Suggested
wiring
(User supplied)
DMS-20PC-1-LM
(Panel mount)
DMS-20PC-1-LM-R
(With round terminals)
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.
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)
www.datel.com
PDF 
ZIP