Alco Controls

Alco Controls
Technical Data
Supply Voltage Nominal 24 Vdc Sensor lifetime
Range (polarity protected) 8... 30 Vdc at full stroke at 25°C > 5.000.000 cycles
Operating current max. 20 mA output Burst pressure >150 bar
Protection class acc. to EN 60529 IP65 Medium compatibility HFC, HCFC
Load resistance
U B
- 8.0V
not suitable for ammonia and
R L
≤
0.02A
inflammable refrigerants!
Temperatures
Materials
Operating ambient housing -40.....80 °C Housing cover, pressure connector, Stainless steel
Medium -50...135 °C diaphragm with medium contact 1.4435 / AISI 316L
Transportation and storage -40.....85 °C Vibration at 10 ... 2000 Hz max. 4 g
Accuracy Performance
Temperature range Total error*
PT4-07M -40 ... +80°C ≤ ± 1 % FS
PT4-18M -20 ... +80°C ≤ ± 1 % FS
PT4-30M 0 ... +40°C ≤ ± 1 % FS
-20 ... +60°C ≤ ± 2 % FS
-40 ... +80°C typically ≤ ±2 % FS
PT4-50M 0 ... +40°C ≤ ± 1 % FS
-20 ... +60°C ≤ ± 2 % FS
-30 ... +80°C typically ≤ ±2 % FS
*) Total error includes non-linearity, hysteresis, repeatability as well as offset and span
drift due to the temperature changes.
Note: % FS is related to Percentage of Full sensor Scale.
Electrical connection
Pressure transmitters PT4 with current output (2-wire connection)
offer following advantages:
1. More suitable for signal transmission over long
distances
2. Higher immunity to electromagnetic interference
Note: Changing the length of the electrical connection
lead beyond 1.5 m can have a negative impact on electromagnetic
compatibility. Additional protection may be
required.
Electronic Controller
BN = brown, supply voltage 24V
WH = white, output signal 4 … 20mA
(5) = Electronic Controller e.g. EC2 & EC3 Series
56
A2.5.1/0810/E