! New generation - preliminary parameters - available from June 2005 !
Relative humidity transmitters with 4-20mA output for two-wire connection are available in wall-mount, duct-mount and bar types. Also types with T+RH probe on a cable are available. Transmitter contains a microprocessor based control circuitry in a durable plastic case with a connection terminals and a humidity sensor in a bronze sintered filter. Transmitters are also available with galvanic isolated temperature output 4-20mA and humidity output 4-20mA. Configiration of outputs and output range are user adjustable. Large dual line LCD for simultaneous display of T+RH, or dew-point temperature is an advantage. Display is possible to switch off. Computerized design ensures maximum long term stability, temperature compensation of the humidity sensor and fail indication. State-of-the-art capacitive polymer sensor ensures excellent calibration long term stability, inertia against water and condensation. Transmitters are designed for use in non-aggressive environment.
APPLICATIONS - measuring and control of air relative humidity at:
- warehouses
- glasshouses
- manufacturers
- museums, archives, galleries
- air-conditioned rooms
- weather stations
| COMMON TECHNICAL PARAMETERS | |
|---|---|
| Air relative humidity range: | 0 to 100% |
| Accuracy of relative humidity measurement: | ±2.5% relative humidity from 5 to 95% at 23°C |
| Accuracy of temperature output: |
±0.4°C from -30 to +100°C ±0.4% from reading over +100°C |
| Accuracy of dew-point temperature output: | ±0.5°C from 30 to 95% RH (calculated from temperature and RH) |
| Temperature operating range of case with electronics: | -30 to +80°C |
| Temperature operating range of LCD display: | readable to operating temperature +70°C, it is recommended to switch OFF the LCD over +70°C |
| Range of RH sensor temperature compensation: | -30 to +125°C |
| Current outputs - two-wire connection: | 4-20mA, galvanic isolated with dual-output models |
| Configuration of outputs and output range: | user adjustable from the PC |
| Filtering ability of sintered bronze sensor cover: | 0.025mm |
| Protection of the case with electronics: | IP65 electronics, IP40 sensors |
| Power: | 9-30Vdc |
| Warranty: | two years |
Transducers are available in the following types:
| Type | Measured value | Maximum range of temperature measurement | Length | Output 1** | Output 2** | Note |
|---|---|---|---|---|---|---|
T1110
|
RH | -30 to +80°C | 67mm | 0 to 100%RH | - | outdoor, indoor |
T3110
|
RH+T+Tdp | -30 to +80°C | 67mm | 0 to 100%RH | -30 to +80°C | outdoor, indoor |
T3111
|
RH+T+Tdp | -30 to +105°C* probe including cable | probe cable 1,2,4m | 0 to 100%RH | -30 to +105°C | T+RH probe, diameter 18mm, length 90mm, 1m cable. Cable lengths 2m or 4m available optionally. |
T3113
|
RH+T+Tdp | -30 to +125°C* | 150mm | 0 to 100%RH | -30 to +125°C | duct mount |
T3117
|
RH+T+Tdp | -30 to +125°C* | 700mm | 0 to 100%RH | -30 to +125°C | bar type |
Tdp .. dew-point temperature
* Maximum temperature only at the measuring end with sensors. Maximum temperature +105°C for T3111 with cable probe is allowed also for the cable. Relative humidity at temperature over +85°C is limited in accordance with the graph. Near plastic case with electronics maximum temperature is +80°C.
** Any measured value (T, RH, Tdp) can be assigned to each output of dual output transmitters. Also identical value can be assigned to both outputs (e.g. humidity + humidity). Outputs are adjusted to maximum range from the manufacturer. Output range is user adjustable from the PC by means of the optional cable - see below. Free configuration program is ready to download from www.cometsystem.cz. If different adjustment of outputs and output ranges are required, please specify required output values (RH, T, Tdp) and required ranges. Minimum full scale is 30°C or 30%RH.
Ordering example: Transmitter T3110, output 1: RH 10 to 90%, output 2: temperature 0 to 35°C
Figure: Working range
Included accessory:
Calibration certificate from the manufacturer.
| OPTIONAL ACCESSORY | ||
|---|---|---|
|
SP003 | cable for transmitter adjustment via USB port |
|
F0000 | spare sintered bronze sensor cover with thread for measuring of temperature and humidity of polluted air. Filtering ability of the cover is 0.025mm. |
|
F5100 | plastic sensor cover with thread for measuring of temperature and humidity of clean indoor spaces. |
|
PP4 | flat plastic circular flange for duct mounting |
|
PP90 | right-angled stain-less steel flange for wall mounting |
|
accessory for calibration and adjustment of humidity by the user | |
Transmitters are directly compatible with sixteen channel Comet monitoring systems MS2+, MS3+, MS4+.