Transmitter, indicator , ON/ OFF regulator , temperature and humidity datalogger with interchangeable probe, Model : HD 2717T, Brand : DeltaOhm
The instruments of the HD2717T... series are transmitters, 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) .
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 the interchangeability of the probes.
The instruments measure:
• Temperature in Celsius or Fahrenheit temperature scale
• Relative humidity
• Absolute humidity
• Mixing Ratio
• Dew point
All models have both current and voltage outputs.
Some models are fitted with two control relays and one alarm relay, configurable by the user.
All models are fitted 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 first 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 measures 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 24Vac/ dc or
Technical specifics ( @ 24Vac and 20° C)
Temperature Sensor Pt100 classe 1/ 3 DIN
Working range of the sensor
-50 ... + 200° C ( -58 ...+ 392° F)
Humidity Relative humidity % RH 5 ... 98% RH
Working range of the sensor in temperature
-50 ... + 150° C
( Special configurations up to 180° C available on request)
Dew point TD -50 ... + 100° C
Absolute humidity 0 ... 600g/ m3
Mixing ratio 0 ... 2000g/ kg of dry air
Wet bulb temperature -50 ... + 100° C
Accuracy of the measured physical quantities
Temperature Pt100 ± 0.25° C
Relative humidity % RH
± 2.5% RH ( 10...90% RH)
± 2.5% RH in the remaining range
Accuracy of the calculated
See table in the following chapter
3min with grid protection ( at 20° C and 0.5m/ s)
Communications Type RS232C and RS485 Multidrop
57600 baud non-permanent
Physical quantities Measured Temperature, relative humidity
Dew point, absolute humidity,
( mixing ratio) .
0...10Vdc; 2… 10Vdc
Current output: 500© max
Voltage output: 100k© min
Accuracy analog outputs ± 0.05% f.s. @ 20° C
In case of measuring error
( exceeding of the operating
limits, faulty or not connected
Idc = 22mA
Vdc = 11V
Relay Working relay
2 x 3A/ 250Vac Load resistance,
1 change-over contact
1 x 3A/ 250Vac Load resistance,
1 with normally open contact
Power supply Versions
24Vdc / 24Vac 50… 60Hz, ± 10%
90 ... 240Vac 50… 60Hz
Average consumption 3W
Data logger Storage capacity 9000 samples in max. 256 sessions
Storage type Circular memory
Temperature, relative humidity, dew point, absolute humidity, mixing ratio, analog outputs 1 and 2, relay status1, 2, 3.
1, 2, 5, 10, 20, 60 seconds, 2 and 4 minutes
Real time clock Type
Real time with Lithium buffer battery
Accuracy ± 1min/ month
for Windows® 98 to Vista operating systems
Display LCD Custom segment LCD
Ambient working conditions of the electronics
Operating temperature -20… + 60° C
Relative humidity 0… 90% RH - No condensate
Static working pressure of the sensors 12 bar max.
Storage temperature -30… + 80° C
Housing L x H x W 143x154x61
Degree of protection Electronics IP65