TESTO 6740, Instruction Manual

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9. Technical data
9.1 Measurement ranges and accuracies
9. Technical data
9.1 Measurement ranges and accuracies
Type of mreasurement Measurement range Accuracy
Pressure dew point -60 to +30°Ctpd ±1K at ±0°Ctp
temperature ±3K at -20°Ctp
(trace humidity) ±4K at -40°Ctp
(at 25°C)
atm. dew point -80 to -15°Ctd at 30bar
rel
cf. pressure dew point temperature
-70 to +10°Ctd at 3bar
rel
-60 to +30°Ctd at 0bar
rel
Temperature ±0 to +50°C ±0.5K
9.2 Additional instrument data
Characteristic Values
Supply voltage 24VDC (standard plug: 12 to 30VDC allowed, 0554.3302 plug: 20 to 28VDC allowed)
Max. load Standard plug: 12V: 50Ohm, 24V: 650Ohm, 30V: 950Ohm
0554.3302 plug: 12V: not allowed, 24V: 650Ohm, 30V: not allowed
Ambient temperature -20 to +70°C
Storage/transport temperature -20 to +80°C
Protection classIP65
(with plug attached and cable connected)
Rotatability 350°
(display alignment)
Humidity sensor
Testo humidity sensor with logged trace humidity-adjustment at -40°Ctp/6bar
Temperature sensor NTC
Sensor protection Stainless steel sintered cap
Pressure resistance -1bar
rel
to +50bar
abs
Measurement chamber 0554.3303: max. 15bar
abs
Dimensions 199.5x37x37 (with standard plug), 203.5x37x37 (with 0554.3302 plug)
Warranty 2 years
Analog output
Signal 4 to 20mA, two-wire technology
Scaling Standard: 4 to 20mA = -60 to +30°Ctpd, with freely scalable display
Output parameters °Ctp, °Ftp, °CtA, °FtA, %RH, ppm
v
, mg/m
3
, °C, °F
Resolution 12bit
Accuracy ±40 μ A
Limit value outputs (optional, only with 0554.3302 plug)
Contacts 2 NO contacts, potential-free, max. circuit 30V/0.5A
Lower switching point +6°Ctp, with display/scaling adapter freely programmable
(LS + HYST)
Upper switching point
+12°Ctp, with display/scaling adapter freely programmable
(US + HYST)