Specifications
Technical data | |
---|---|
Measuring quantity | Standard flow velocity wN, based on standard conditions 1) Temperature of medium TM |
Measured medium | Air or nitrogen Optional: Natural gas, biogas, CO2, special gases and gas mixtures |
Measuring range wN | 0 … 10 / 20 / 60 / 90 / 140 / 220 m/s Optional: Customised measuring ranges in 0.1 m/s steps |
Lower detection limit wN | 0.2 m/s |
Measuring range temperature TM | SS 20.600: -20 … +120 °C SS 20.600 Ex: -40 … +120 °C |
Measuring accuracy | |
Standard wN | ± (3 % of measured value + [0.4 % of fmr; min. 0.08 m/s]) 1) |
High precision wN (optional for air, nitrogen, oxygen only) | ± (1 % of measured value + [0.4 % of fmr; min. 0.08 m/s]) 1) |
Response time (t90) wN | 1 s (jump of wN from 0 to 5 m/s in air) |
Temperature gradient wN | < 8 K/min (at wN = 5 m/s in air) |
Temperature TM (wN > 5 m/s) | ± 1 K (10 … 30 °C); ± 2 K (in remaining measuring range) |
Operating temperature | |
Sensor | SS 20.600: -20 … +120 °C SS 20.600 Ex: -40 … +120 °C |
Electronics | -20 … +70 °C |
Storage temperature | -20 … +85 °C |
Material | |
Housing | Aluminium, anodised |
Sensor tube | Stainless steel 1.4571 |
Sensor head | Platinum resistor element (glass-passivated), PPO / PA |
Protective sleeve (ATEX option) | Aluminium, anodised |
Sensor cable (remote sensor) | Jacket (PUR, halogen free, UL) |
Compression fitting | Stainless steel 1.4571 or brass (depending on sensor option) |
General data | |
Humidity | Measuring mode: Non-condensing (< 95 % RH) |
Operating pressure (max.) | 0 … 16 / 40 bar (optional) |
Display | 4 x Duo-LEDs (green / red / orange) |
Supply voltage | 24 V DC ± 20 % |
Current consumption | Typical 50 mA (without pulse outputs); max. 250 mA (including signal current of all outputs) |
Analog outputs for wN and TM (type: Auto U / I) | Auto-U/I: 0 … 10 V / 4 … 20 mA (signal characteristic depends on RL) Voltage output: RL ≥ 550 Ω (short-circuit protected) Current output: RL ≤ 500 Ω Change-over hysteresis: 50 Ω CL ≤ 10 nF |
Pulse outputs: Signalization | Frequency: wN ~ f = 0 … fmax; fmax = 10 … 100 Hz Optional: 1 pulse/1 m3; 1 pulse/0.1 m3; 1 pulse/0.01 m3 (max. 100 pulses/s) |
Pulse outputs: Technology | 1. Highside-driver (open collector at protected supply voltage; not galvanically isolated) High level: > supply voltage - 3 V 2. Semiconductor relay (galvanically isolated), max. 30 V / 50 mA |
Electrical connection | Plug-in connector M12 (A-coded), male, 8-pin (shielded), screwed |
Maximum cable length | Voltage interface: 15 m Current interface (pulse output): 100 m |
Mounting position | Arbitrary (with vertical downdraft: lower detection limit = 2 m/s at 16 bar) |
Mounting tolerance | ± 3° relative to flow direction |
Minimum immersion depth | DN 25 |
Protection type / class | IP67 (probe); IP65 (housing) / III or PELV (EN 50178) |
ATEX category | II 3G Ex nA ic IIC T4 Gc |
Probe length | Compact version: 120 / 250 / 400 / 600 mm / Special lengths from 120 to 1,000 mm Remote version: Probe 120 / 250 / 400 / 600 mm Remote cable: 1 … 10 m (in steps from 1 m) |
Weight | Approx. 500 g max. (without connection cable) |
1) based on standard conditions: 20 °C and 1,013.25 hPa, related to adjustment reference; "fmr" = final measuring range
Subject to technical changes.