4 to 20 mA Loop Powered 4 1/2 Digit LCD Digital Panel Meters
Red Negative
The DPL-4 provides a loop powered 4 1/2 digit LCD (standard black numerals) with optional 24V dc or 5V dc powered red, blue, amber, or green backlight. It is compatible with virtually any 4 to 20 mA dc process loop. Large 1/2" numerals. User selectable "°F", "°C", "PSI", and "%" engineering units can be displayed. Separate zero and span adjustments. Decimal point user selectable. Factory calibration available.
Green Negative
Specifications
Display:
Digits:
4 ½ digits (±19999 counts)
Type:
0.45" (11.4 mm) 7 segment LCD
Backlighting:
Optional Red Negative (red numbers/black background)
Optional Blue Negative (blue numbers/black background)
Optional Green Negative (green numbers/black background)
Optional Green Positive (black numbers/green background)
Polarity:
Automatic, “-” displayed
Annuciators:
°F, °C, PSI, %
Decimal Points:
4 position, user selectable
Overload:
Four lower order digits blank for inputs >19999 & <-19999
Inputs:
Ranges:
4 to 20mA DC
Impedance*:
300 ohms nominal
Performance:
Accuracy:
±(0.1% fs + 2 count)
Conversion Rate:
3 per second
Normal Mode Rejection:
>30 db @ 60 Hz
Adjustments:
Using 25-turn potentiometers
Span (gain) and Zero (offset) with 3 coarse setting
ZERO (offset)
0 to ±19999 counts
SPAN (gain)
0 to 19999 counts above adjusted zero
Warmup:
10 minutes typical
Temperature Coeff.:
± 100 ppm per °C typical
Environment:
Operating Range:
0 to 50 °C
Storage Range:
-20 to 70 °C
Power Supply:
Powered by the Milliamp Control Loop
Optional Backlight:
24V DC at 35 mA typical
5V DC at 130 mA typical
Mounting:
Snap-in Bezel mount
Connection:
2 screw terminals (4 with backlight)
*Impedance is rated at 20mA. Exercise caution to avoid too much impedance in the current loop. Most transmitters are rated 500 to 1000 ohms maximum.
Negative backlighting is lighted numerals.
Positive backlighting is lighted background.
Blue Negative
Amber Negative
Green Positive
Features
• Low-cost, high-performance replacement for many OEM DPMs
• Optional Red, Blue, Green or Amber backlighting
• Snap-in bezel mount eliminates mounting hardware
• Resistant to RF and EMI
• 4 1/2 digits LCD Display
• 4 to 20 mA loop powered input
• User selectable, displayed engineering units
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