Supported Applications
The Omega DPF53 series comprises 3½ digit mini-size DC voltmeters and process meters designed for panel-mounted monitoring of electrical signals. The product family includes the DPF53, which functions as a low-cost DC voltmeter with ranges from ±199.9 mV to ±199.9 V, alongside the DPF51 series offering both voltmeters and current indicators covering 4 to 20 mA up to 0 to 100 V inputs.
Operating Conditions & Performance
The meters operate within an ambient temperature range of 32 to 140°F (0 to 60°C) and support relative humidity levels up to 95% at 104°F (non-condensing). Accuracy is specified as ±0.05% of reading ±1 count, with a full-scale step response time of 1 second. The display resolution reaches ±1999 counts.
Electrical performance includes noise rejection capabilities: Normal Mode Rejection (NMR) at 56 dB for 50/60 Hz and Common Mode Rejection (CMR) at 120 DC to 60 Hz. Maximum input limits vary by range, with voltage ranges supporting up to 250 Vp maximum input.
Measurement Ranges
• Voltage: ±199.9 mV, ±1.999 V, ±19.99 V, ±199.9 V; 0 to 200 mV, 0 to 5 Vdc, 0 to 10 Vdc, 0 to 100 Vdc
• Current: 4 to 20 mA
Input Characteristics by Range
• ±199.9 mV: Resolution 0.1 mV (100 μV), Input Resistance 1 GΩ, Bias Current 50 pA
• 4 to 20 mA: Input Resistance 13 Ω, Maximum Input 55 mA
• Voltage Ranges (≥0.2 V): Input Resistance typically 1 MΩ or higher depending on range; Bias Current ranges from 1 pA to 50 pA.
Configuration Options
The series supports multiple power configurations and display options tailored for diverse installation environments. The DPF53, DPF51, and DPF57 models accommodate AC or DC power inputs with specific suffixes denoting voltage requirements.
Power Supply Options
• AC Power: 24, 100, 115, or 230 Vac ±15%, 49 to 63 Hz (Suffixes: -24VAC, -100V, -230V)
• DC Power: 7 to 32 Vdc non-isolated for DPF51 models only; 5 Vdc ±5% non-isolated
Housing and Mounting
The meters feature a standard ¾ DIN panel cutout with bezel dimensions of 0.94" H x 2.84" W (24 mm x 72 mm) and a depth behind the bezel up to 4.6" (120 mm). The enclosure includes an optional NEMA 4X splashproof lens cover.
Display Options
• Standard: Red LED display with 14.2 mm (0.56") height digits
• Optional: Green LED display via suffix "-GR"
Sensor Excitation (DPF57 Only)
The DPF57 variant provides isolated excitation for transmitters, offering user-selectable output voltages of 10 Vdc or 24 Vdc. Maximum load current is rated at 30 mA @ 10 V and 20 mA @ 24 V.
Key Product Differences
The DPF53 series encompasses distinct model families with specific input capabilities:
• DPF53: Dedicated DC voltmeter models (e.g., DPF53-AV2, DPF53-AV4) covering bipolar voltage ranges from ±199.9 mV to ±199.9 V.
• DPF51: Includes both current indicators and voltmeters with unipolar ranges (e.g., 0 to 200 mV, 4 to 20 mA).
• DPF52/DPF57: Models equipped with sensor excitation outputs for powering external transmitters.
All models share the same mechanical footprint and environmental ratings but differ in input range configurations, power supply compatibility, and availability of excitation features. The DPF51 series supports 4 to 20 mA current inputs alongside voltage ranges up to 0 to 100 Vdc.
- Easy to Use and No Programming Required
- Zero and Span Adjustments of 2,000 Counts Each
- ±1,999 Count Display Span
- 120 dB CMR, 56 dB NMR
| A/D Conversion | Dual-slope, average value |
| Accuracy | ± 0.05 % rdg ±1 count |
| Cutout Dimensions | 22 x 68 mm |
| Display Color | Red |
| Display Size | 14.2 mm (0.56 in) |
| Display Type | 3.5 Digit Single LED |
| Display Type Note | 7-segment, LED; 14.2 mm (0.56") Decimal Points: Three positions jumper-selectable |
| Excitation Voltage Note | Transmitter Excitation Supply: Selectable 10V @ 30 mA or 24 Vdc @ 20 mA |
| Form factor | 3/64 DIN |
| Front Bezel | 24 H X 72 W mm |
| Height | 24 mm |
| Impedance Input | 1 MΩ |
| Line Regulation | ±0.01%/V of AC power |
| Load Regulation | ±0.5% |
| Noise Rejection | NMR, SIG HI to SIG LO: 60 dB, 50/60 Hz ;CMR, SIG GND to SIG LO: 86 dB, dc to 60 Hz ;CMV, SIG GND to SIG LO: -1 to +2.5 Vdc |
| Number of Inputs | 1 |
| Operating Temperature, Max | 60 °C |
| Operating Temperature, Min | 0 °C |
| Output Ripple | ± 0.01 % |
| Power Supply Rejection | 86 dB at 50/60 Hz |
| Reading Rate | 2.5 samples/sec |
| Relative Humidity | 95% at 40°C (non-condensing) |
| Resolution | 0.1 mV (100 µV), 0.001V (1 mV), 0.001V (10 mV), 0.1V (100 mV) |
| Sensor/Transmitter Power | 10V @ 30 mA |
| Series ID | DPF53 |
| Signal Integration Period | 100 ms |
| Step Response | 1 sec |
| Supply Power Note | 24, 100, 115 or 230 Vac ±15% @ 2 watts; 49 to 63 Hz |
| Supply Voltage | 7 to 32 Vdc, 24 to 230 Vac |
| Temperature Coefficient | ±0.01% of offset/°C |
| Thermal Span Effect | ±0.02% of rdg/°C |
| Weight | 200 g |
| Width | 72 mm |