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Laboratory Electronics

THERMOMETER - HYGROMETER LB-710AL / LB-710ALT


  • 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
Thrmometr higrometer LB-710AL

Description

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 .

Technical data

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
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
*) - Going beyond recommended constant work conditions (i.e. when installing the device in the open space) requires using additional protection means for the device's electronic part so that water out dropping does not start inside of the device (protecting the electronics with silicone or using additional external casing).
POWER SUPPLY
Scope of voltage 8..24V DC
Energy consumption 3mA average
25mA maximum

INTERFACE

Transmission parameters: time in accordance with RS232C, 300 bps, 7 information bits, without the evenness control, 1 stop bit working in a standard of a digital current loop.

OVERALL DIMENSIONS

Casing type L: approx. 83 x 83 x 37 mm.

EXTENDED VERSIONS

The following versions are available upon a special order:
  • LB-710ALH - with extended compared to standard scope of constant humidity measurement to 0...100%.
  • LB-710ALT - only for temperature measurement.
GOOD CLIMATE IS FAVORABLE

See also
See also
LB-710 LB-710
Thermometer - hygrometer LB-710 is designed for air temperature and relative humidity measurement in rooms. It can work in places where there is great dustiness since it has a hermetic casing and an adequate filter that protects the measurement sensors. It is a stationary device, of small size, powered from an outside power supply.
Ocena produktu
Hytherograph LB-710AL is designed for air temperature and relative humidity measurement in closed places (museums, warehouses, archives, laboratories)
Ocena: 5/5, liczba głosów: 14
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