| Vaisala DPT145 General Specifications |
| Measured Parameters |
Dew point |
-50 ... +30 °C (-58 ... +86 °F) |
| Pressure, absolute |
1 ... 12 bar (14.5 ... 174 psi) |
| Temperature |
-40 ... +80 °C (-40 ... +176 °F) |
| Calculated Parameters |
Pressure, normalized to +20 °C (+68 °F) |
1 ... 12 bar (14.5 … 174 psi) |
| SF6 or SF6/N2 mixture density |
0 ... 100 kg/m3 |
| Moisture by volume, ppm |
40 ... 40 000 ppm |
| Dew point, converted to atmospheric pressure |
-65 … +30 °C (-85 ... +86 °F) |
| Measurement Performance |
Dew point accuracy |
±3 °C (±5.4 °F) |
| Dew point stability |
Typical drift < 2 °C (3.6 °F) / 5 years |
| Pressure accuracy at +23 °C (+73.4 °F) |
±0.4 %FS |
| Pressure temperature dependence |
±0.01 bar/10 °C (18 °F) |
| Pressure stability |
Typical drift < 1 %FS / 5 years |
| Temperature accuracy |
0 ... +40 °C (+32 ... +104 °F): ±0.5 °C (± 0.9 °F), -40 ... 80 °C (-40 ... +176 °F): ±1 °C (± 1.8 °F) |
| Density accuracy (pure SF6, 1 ... 12 bara) |
0 ... +40 °C (+32 ... +104 °F): ±1 %FS, -40 ... +60 °C (-40 ... +140 °F): ±2.2 %FS |
| Typical ppm accuracy (5 ... 1000 ppm, 7 bar) |
±(7 ppm + 15 % of reading) |
| Sensor |
Vaisala MPS1 multiparameter sensor |
| Sensor Response Time |
| Pressure response time |
< 1 s |
Dew point response time 1)
63 % [90 %] at 20 °C and 1 bar |
-50 - -10 °C Tdf: 5 s [10 s]
-10 - -50 °C Tdf: 10 s [2.5 min] |
| Inputs and Outputs |
Digital inputs |
RS-485, non-isolated, Vaisala protocol Modbus RTU protocol |
| Connector |
4-pin M8 |
| Operating voltage |
15 ... 28 VDC 20 ... 28 VDC in cold temperatures (-40 ... -20 °C (-40 ... -4 °F)) |
| Supply current, during normal measurement |
20 mA |
| Supply current, during self-diagnostics |
Max. 300 mA pulsed |
| Operating Environment |
Operating temperature of electronics |
-40 … +60 °C (-40 ... +140 °F) |
| Operating pressure |
0 … 50 bar (0 … 725 psi) |
| Relative humidity |
0 … 100 % |
| Measured gases |
SF6, SF6/N2 mixture |
| Storage temperature, transmitter only |
-40 … +80 °C (-40 ... +176 °F) |
| Storage temperature, shipment package |
-20 … +80 °C (-4 ... +176 °F) |
| Mechanical Specification |
Housing material |
AISI316L |
| Weather shield to be used for continuous outdoor installations |
| Mechanical connection |
DILO DN20, DILO DN8, ABB Malmkvist, or Alstom G1/2 in compatible connector Every connection is helium leak tested at the factory. |
| Weight (with DILO adapter) |
765 g (27.0 oz) |
| Compliance |
IP rating |
IP66 |
| EMC compliance |
EN61326-1, Electrical equipment for measurement, control and laboratory use - EMC requirements |
| Industrial Environment, Tested Levels |
| EN/IEC 61000-4-2, Electrostatic Discharge |
8 kV con / 15 kV air |
| EN/IEC 61000-4-3, RF ®eld immunity |
10 V/m (80MHz-4.2GHz) |
| EN/IEC 61000-4-4, Electric Fast Transient |
±2 kV power and signal |
| EN/IEC 61000-4-5, Surge |
±2 kV power line to ground / ±1kV signal line to ground and power line to line |
| EN/IEC 61000-4-6, Conducted RF Immunity |
10 Vemf power line and digital output |
| Mechanical Vibration |
| EN/IEC 60068-2-6, Fc Sinusoidial vibration |
±6 g, 5-500 Hz sweep 60 min/axis, 3-axis |