Minihelic® Differential Pressure Indicating Transmitters- Series 604D
Dial gage indication; 2,3 or 4 wire. 4-20mA output.
Dwyer Series 604D Minihelic® Indicating Transmitter combines visual monitoring with electronic control of low differential air or compatible gas pressures. This versatile device is ideal for building HVAC systems where local indication is needed during the maintenance checks or when troubleshooting the system. The transmitter design employs the latest silicon strain gage technology and operates in 2, 3 or 4 wire control loop circuits. Separate Zero and Span controls plus a 4-screw terminal strip are protected in a gasketed side enclosure. Cable gland fits .10 - .25" round cable. A 13-35 VDC or 18-26 VAC (4-wire only) power supply is required.
SPECIFICATIONS
| GENERAL | |
| Maximum Pressure: | 30 PSIG (207 kPa) continuous, 50 psig (344 kPa) surge |
|---|---|
| MediaCompatibility: | Air and non-combustible, non-corrosive gaseS |
| Materials: | Mineral and glass filled nylon housing, high impact acrylic cover, silicone rubber diaphragm. |
| ELECTRICAL | |
| Power Supply: | 13-35 VDC - 2, 3 or 4 wire, 18-26 VAC - 4 wire |
| Output Signal: | 4-20 mA DC (limited at 38 mA DC) |
| Loop Resistance: | DC, 0-1100 ohms, AC- 0-1100 ohms; AC, 0-1130 ohms |
| Warm-up Time: | 10 minutes |
| PERFORMANCE AT 70°F (21.1°C) | |
| Zero Output: | 4 mA DC |
| Full Span Output: | 20 mA DC |
| Accuracy, Gage: | ±5% of full span output |
| Accuracy, Transmitter: | ±2% of full span output (Includes linearity, hysteresis and repeatability) |
| Stability: | 1% full span per year |
| ENVIRONMENTAL | |
| Operating Temperature: | 20 to 120°F (-6.7 to 49°C) |
| Thermal Error: | ±1% per 50°F |
| MECHANICAL | |
| Weight: | 8 oz. (227 grams) |
| Span and Zero Controls: | Internally accessible potentiometers |
| Pressure Connections: | Barbed, for 3/16" (4-5 mm) I.D. tubing |
| Standard Accessories: | |
| Two #10x1" pan head sheet metal screws, one .050 hex allen wrench | |
MODULE MODELS
| Model Number | Range, Inches W.C. |
|---|---|
| 604D-0 604D-1 604D-2 604D-3 604D-5 604D-10 604D-20 604D-40 604D-60 604D-100 |
0-0.5 0-1.0 0-2.0 0-3.0 0-5.0 0-10 0-20 0-40 0-60 0-100 |