Delta OHM HD402T/ST/AT4 - Low Pressure Transmitters

Sensor Piezoresistive, High stability
Measuring range See table 2.1
Resolution See table 2.2
Accuracy (*) • HD402TR1…: ±(0.8% measure + 0.5 Pa) @ 0…50 °C
• HD402…T1…: ±1.5% FSS @ 25 °C / ± 3% FSS @ 0…50 °C
• HD402…2…: ±0.75% FSS @ 25 °C / ± 1% FSS @ 0…50 °C
• HD402…3… / HD402…4… / HD402…5…: ±1% FSS @ 0…50 °C
Long term stability
(1000 h) @ 25 °C
• HD402TR1…: ±0,2 Pa with auto-zero
• HD402…T1… / HD402…2…: ±0.5% FSS
• HD402…3…: ±0.35% FSS
• HD402…4…/ HD402…5…: ±0.25% FSS
Output • HD402T…: Active analog 0…10 Vdc (RLmin = 10 kΩ) or 0/4…20 mA
(RLmax = 500 Ω)
• HD402AT…: 2-wire (current loop) 4…20 mA (RLmax = (Vcc-12)/0,022)
• HD402ST…: Digital RS485 Modbus-RTU
• HD402TR…: SPDT Relay switch, 3 A/250 Vac, 3 A/30 Vdc resistive
load
Alarm (only HD402TR) Front LED, internal buzzer, relay switch
Response time 0.5 seconds for the display updating
For transmitters: configurable 0.125, 1, 2 or 4 seconds for the output
Overpressure limit • HD402…1… / HD402…2… / HD402…3…: 50 kPa
• HD402…4…: 200 kPa
• HD402…5…: 400 kPa
Connection to PC • HD402T… / HD402AT… / HD402TR…:
RS232 serial port
Can be connect to a USB port by using the optional CP27 adapter
• HD402ST…:
Can be connect to a USB port by using the optional RS48 adapter
Zero calibration Automatic for HD402TR1L, manual for the other models
Compatible media Only air and non-aggressive dry gases
Power supply • HD402T…: 24 Vac ± 10% o 18…40 Vdc
• HD402AT… and HD402ST…: 12…30 Vdc
• HD402TR…: 24 Vac ± 10% o 15…36 Vdc
Absorption • HD402T…, HD402AT… and HD402TR…: < 1 W @ 24 Vdc
• HD402ST…: < 100 mW @ 12 Vdc
Pressure connection Nickel-plated brass, Ø 6 mm
Electrical connections Screw terminal block, max 1.5 mm2 , PG9 cable gland
Operating conditions -10…+60 °C / 0…95% RH
Storage temperature -20…+70 °C
Housing dimensions 80 x 84 x 44 mm
Protection degree IP65