- functions: thermometer, hygrometer (humidity meter)
- measurement: temperature, air relative humidity
- wide scope of work temperatures
- two cable connection
- digital
result transmission to long distances
- small size
- display
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Hytherograph LB-710AL is designed for air temperature and relative humidity measurement in closed places (museums, warehouses, archives, laboratories). It is a stationary device, of small size, powered from an outside power supply.
For measurement the device uses data from the temperature sensor Pt-1000 as well as from the capacitive relative humidity sensor. Basing on the knowledge of nonlinear sensor characteristics and digital calibration data stored during the calibration process in a device's memory - the microprocessor (built-in the device) counts the actual relative humidity and temperature measurement results. Those results are sent (in a digital form) from the device to the supervisory system of data collection.
The device is equipped with a digital current interface and its time course is analogous to the standard RS232C. Such interface beside data transmission is also used for powering the hytherograph - using two-cable connection for this purpose (i.e.: telephone type), but the polarity of attaching the interface's cables is optional.
The device can be attached to any supervisory system using the interface i.e.: concentrator LB-487 or to an interface RS232C of any computer (through interface LB-375). It allows on remote control and automatic measurement data collection.
The device does not have any mechanical calibration elements (i.e.: potentiometers). The calibration of the device is performed by sending calibration data obtained in the model climate conditions through a digital interface to the non-volatile memory of device. It guarantees comfort and high calibration accuracy as well as stability of the device's meteorological parameters in time.
Each hytherograph (upon a request)
can have an individual calibration
certificate issued by the LAB-EL Calibration Laboratory.
| TEMPERATURE MEASUREMENT | ||
|---|---|---|
| Measurement inaccuracy |
+/- 0.2°C | +/- 1 last digit |
| Scope of measurement | -40..+85°C | version LB-710L |
| HUMIDITY MEASUREMENT | ||
|---|---|---|
| Measurement inaccuracy |
+/- 2.0% | in the scope of 10...90%, +/- 1 last digit |
| +/- 4.0% | outside of the scope 10...90% | |
| Scope of measurement LB-710AL | 10..95% | for temperatures up to +40°C |
| 10..60% | for temperatures up to +70°C | |
| Scope of measurement LB-710ALH | 0..100% | for temperatures up to +60°C |
| 0..70% | for temperatures up to +70°C | |
| MEASUREMENT READINGS |
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|---|---|---|
| Parameter |
Scope of readings | Resolution |
| Air temperature |
-40.0..+85.0°C | 0.01°C |
| Relative humidity | 0.0..100.0% | 0.1% |
| RECOMMENDED CONSTANT WORK CONDITIONS *) | |
|---|---|
| Scope of temperatures |
0..40°C |
| Scope of humidity | 20..80% |
| Level of environment corrosion aggressiveness accord. PN-71/H-04651 | B |
| Degree of casing protection |
IP 20 |
| POWER SUPPLY |
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|---|---|---|
| Scope of voltage | 8..24V DC | |
| Energy consumption | 3mA | average |
| 25mA | maximum |
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