Datel DMS-30PC Series, Manual, Page: 2 / 6

2
Performance/Functional Specifications
Typical at T
A
= +25°C and supply voltage = +5V using the single-ended input circuit,
unless otherwise noted.
DMS-30PC
3 ½ D I G I T , L E D D I S P L A Y D I G I T A L P A N E L V O L T M E T E R S
DMS-30PC - 1 - R S
LED Color:
AS = Standard Amber
BS = Standard 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
Technical Notes
1. +1.23V REFERENCE OUTPUT (Pin 9): This pin is the output of the
meter’s pre1.23V internal reference, and it is referenced to
ANALOG COMMON (pin 10) which sits at a potential of approxi-
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 is5V 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:
-GS (Standard Green)
-RS (Standard Red)
-RL (Low-Power Red)
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.
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 -- M
Ω
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 (V
IN
= +0.19V) -- ±1 ±2 Counts
DMS-30PC-1 (V
IN
= +1.9V) -- ±1 ±2 Counts
DMS-30PC-2 (V
IN
= +19V) -- ±2 ±3 Counts
DMS-30PC-3 (V
IN
= +190V) -- ±2 ±3 Counts
Zero Reading (V
IN
= 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:
Blue display -- +400 +550 mA
All others -- +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 V
IN
)
Overrange Indication "–1_ _ _ " for negative V
IN
"1_ _ _ " for positive V
IN
Physical/Environmental
Operating Temperature:
Blue display models 0 -- +50 °C
All other models 0 -- +60 °C
Storage Temperature – 40 -- +75 °C
Humidity (Non-condensing) 0 -- 95 %
Case Material Polycarbonate
Weight 0.75 ounces (21 grams)
A panel-mount retaining clip is supplied with each model.