transducer with data logging function for temperature and humidity | HD 2717T...

general information:

The instruments of the HD2717T... series are transducers, indicators, and ON/OFF regulators with data logging functions, they measure temperature and humidity.

The main feature of these instruments is their interchangeable probe. The probe can be replaced by the user without process interruption. Thus, the probe can be calibrated or repaired at a later time. The instrument is available in three different versions: with horizontal probe (S.TO), vertical probe (S.TV) or with remote probe (S.TC), having the probe connected to the electronics by means of a cable of various lengths. The S.TO and S.TV probes are made of stainless steel AISI304, the S.TC probes can be of stainless steel AISI304 or POCAN (plastic material). For the measurement of dew point in compressed air systems, the S.TC2.480.2 probe can be used. The probe is factory calibrated and ready to use, it is provided with a SICRAM2 module which stores the calibration data of the probe, allowing its interchangeability. The instruments measure:

temperature in Celsius or Fahrenheit
relative humidity

and calculate:

absolute humidity
mixing ratio
dew point
wet bulb temperature

All models have both current and voltage outputs. Some models are fi tted with two control relays and one alarm relay, confi gurable by the user. All models are fi tted with a multistandard RS232/RS485 serial port and an auxiliary RS232C standard serial output. The RS485 serial output allows the management of more than one device in a network.

The models HD2717T... can be with or without LCD. The display shows on the fi rst line the relative humidity or a derived parameter and on the second line the temperature in degrees Celsius or Fahrenheit.

The data logger function allows to store the measuring values with a selectable storage interval. The instrument setup remains permanently stored, while the real time clock is protected by an apposite Lithium battery against temporary mains voltage interruptions.

The power supply can be chosen, at the time of placing the order, between 24 V AC/DC or universal 90 to 240 V AC.

specifications (at 24 V AC and 20°C):

input:
temperature:	sensor: Pt100 class 1/3 DIN working range of sensor: -50 to +200°C (-58 to +392°F)
Feuchte:	relative humidity % r.h.: 0 to 100 % r.h. working range of sensor (temperature): -50 to +150°C (special configurations up to 180°C available upon request) dew point: -50 to +100°C absolute humidity: 0 to 600 g/m³ mixing ratio: 0 to 2,000 g/kg of dry air wet bulb temperature: -50 to +100°C
accuracy (measured values):	temperature: Pt100 ±0.25°C relative humidity % r.h.: ±1.5 % r.h. (0 % to 90 % r.h.) ±2.0 % r.h. (elsewhere) for T = +15 to +35°C ±(1.5+1.5% of measured value) % r.h. in the remaining temperature range
accuracy (calculated values):	see table in the data sheet accuracy dew point at T = 20°C ±2°C DP (-40 to -20°C DP) ±1,5°C DP (-20 to 0°C DP) ±1°C DP (0 to +20°C DP)
response time:	3 min with grid protection (at 20°C and 0.5 m/s)

outputs:
communication:	type: RS232C and RS485 Multidrop baud rate: 9,600 baud, 57,600 baud non-permanent
physical quantities:	measured: temperature, relative humidity calculated: dew point, absolute humidity, mixing ratio, wet bulb temperature
analog outputs:	number: 2 output types: 4 to 20 mA; 0 to 20 mA 0 to 10 V DC; 2 to 10 V DC load resistance: current output: 500 Ω max. voltage output: 100 kΩ min. resolution: 16 bit accuracy analog outputs: ±0.05 % f.s. at 20°C in case of measuring error (exceeding of the operating limits, faulty or not connected probe,…): Idc = 22 mA, Vdc = 11 V
relay:	working relay: 2x 3A/250 V AC load resistance, 1 change-over contact alarm relay: 1x 3A/250 V AC load resistance, 1 with normally open contact

instrument:
power supply:	versions: 24 V DC / 24 V AC 50 to 60 Hz, ±10 % 90 to 240 V AC, 50 to 60 Hz average consumption: 3 W
data logger:	storage capacity: 9,000 samples in max. 256 sessions storage type: circular memory stored parameters: temperature, relative humidity, dew point, absolute humidity, mixing ratio, wet bulb temperature, analog outputs 1 and 2, relay status 1, 2, 3 storage interval: 1, 2, 5, 10, 20, 60 s, 2 and 4 min
real time clock:	type: real time with lithium buffer battery accuracy: ±1 min/month
software:	DeltaLog12 for Windows operation systems from Windows ® 98
display:	LCD: custom segment LCD
ambient working conditions (electronics):	working temperature: -20 to +60°C relative humidity: 0 to 90 % r.h. - no condensate static working pressure of the sensor: 12 bar max. storage temperature: -30 to +80°C
housing:	L x H x W: 143 x 154 x 61 weight: 600 g material: ABS ingress protection: electronics IP65

Probes are supplied with filter P7 as standard. For temperatures up to 150°C we recommend the use of probes with stainless steel (AISI 304) stem and filter P6.

Extra charge for replacement of filter P7 with P6.

For further details p.r.t. data sheet: