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Indicators for Melt Pressure Control- Models DP434 Digital and DP409 Analog Controllers
TRODEKS Engineering | Thermocouples, Pressure Transducers, Flow Meters, PID Controllers
  • Transducer Excitation Supply Standard
  • Integral Shunt Calibration for Easy Set-up, Span Check and Adjustment
  • Recorder Outputs Standard
  • DP434 Features 3 1 /2 Digit LED Display with Fixed Zero for 19990 Display
  • DP409 Features Easy-to-Read Analog Display with 240° Dial Indication
  • Adjustable Damping, Response Time Selectable at 0.3 s or 5.0 s
  • Dual Alarm Setpoints HI/HI, LO/LO, LO/HI, HI/LO
 Manuals (contact with email : [email protected])


trodeks’s melt pressure indicators also function as transducer power supplies and signal conditioners. The DP434 Digital Model has a large 3 1 /2 digit LED display which is easy to read, even from a distance, while the DP409 Analog Model has a 6", 240° arc (international scale) for easy viewing. Both units are housed in a standard 1 /4 DIN case. The DP434 and DP409 are designed for use with trodeks’s melt pressure transducers or any 4-leg, 350 ½ Wheatstone bridge strain gage transducer. A calibration switch allows for a quick span check and adjustment for zero at zero pressure. The complete electronics assembly can be removed and replaced from the front without disturbing the wiring in back. Dual setpoint models can be used to give a preliminary warning before an actual shutdown sequence is initiated. HI/HI LO/LO, LO/Hl, or HI/LO alarm modes can be programmed, and the relays are isolated during a setpoint change or calibration check to prevent accidental emergency shutdown.

DP434 Digital & DP409 Analog Meters

Performance Characteristics
Standard Ranges:
0-1500, 0-3000, 0-5000, 0-10,000, & 0-15,000 psig
Accuracy: ±0.1% of full scale or one digit (DP434); ±2.0% of full scale (DP409)
Analog (Recorder) Output:
Accuracy: ±0.1% of full scale
Repeatability: ±0.1% of full scale
Linearity: ±0.1% of full scale
Stability: ±0.1% of full scale (or one digit)

Electrical Characteristics
106-125 or 200-250 Vac 50/60 hz, 1 /8 Amp maximum
Zero Adjustment:±35% with front panel adjustment
Sensitivity Adjustment (Span): 1 to 2.5 mV/V or 2.5-5.0 mV/V switch selectable and fully adjustable.
Shunt Resistance Calibration: Internal 30.1 k½ Shunt Resistor
Response Time (Damping): Selectable at 0.3 or 5.0 seconds
Recorder Outputs:Standard: 0-1 Vdc; 0-2 Vdc, 0-5 Vdc & 0-10 Vdc;
Optional:4-20 mA, load from 15-400 &trodeks; (add suffix R to model number and $100 to price)
Transducer Power Supply: 8.2 Vdc ±5%

Control Characteristics
Dual Relays:
2 SPDT (Single pole double throw)(Shipped 1 Hi, 2 Lo)
Relay Rating: 8 Amp @ 125/250 Vac, 5 Amp @ 30 Vdc
Set Point Range:1-100% of full scale
Accuracy:±0.3% of full scale
Hysteresis:±0.5% of full scale
Alarm Indication:Front panel LED
Mode:Above or below set point
Reset:Automatic or manual
Peak Hold:Optional

Physical Characteristics
1/4 DIN
Display:For DP434: 3 1 /2 active digits, LED, 0.3 in height, plus extra digit fixed zero and selectable decimal point. For DP409: 6" scale, 240° arc.
Operating Temperature:0 to 140°F (-18 to 60°C)
Weight:2.5 lb. (1.1 kg)
Note:Range changes for the DP434 can be made in the field

For Complete Product Specifications see Related Links at bottom of page.

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