Thermometer LB-522T with a built in LCD display is designed for
measurement of air temperature or different medium. It is especially
recommended for places where there is high humidity (i.e. freezers,
coolers) since it is possible to attach it with an outside sensor
resistant to humidity's influence.
The device in a standard version has an inside sensor for temperature measurement (thermometric resistor Pt1000). Optionally, the outside sensor is connected with a meter using a cable of 1...10 m in length (depending on user requirements). In a version with an outside temperature sensor the device is designed for temperature measurement of different mediums in the scope -100...+200°C or (in "E" version) in the scope -200...+550°C according to information provided in technical data "extensions". The thermometer has a minimum and maximum memory function.
It is a portable device of small size powered from a built in long lasting lithium battery. It is characterised by modern construction based on efficient and energy saving microprocessor servo. Basing on the knowledge of non-linear temperature sensor characteristics and digital calibration data stored during calibration in the device memory the microprocessor built in the device calculates the actual temperature measurement results.
The following measurement results are presented on a big easy to read LCD display and can be sent out from the device through a digital current loop interface approximately every 2 seconds. The output interface beside data transmission can also be used for powering the thermometer – using for this purpose a two cable line (i.e. telephone type) where polarity of attaching the interface cables is random.
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 the device. It guarantees comfort and high calibration accuracy as well as stability of the device's meteorological parameters in time.
|Measurement inaccuracy||+/- 0,1°C||+/- 1 last digit, in the scope 0 .. +50°C|
|+/- 0,2°C||+/- 1 last digit, in the scope -30 .. +50°C|
|+/- 0,6°C||+/- 1 last digit, in the scope -100..+200°C|
|+/- 1,2°C||+/- 1 last digit, in the scope -200..+550°C|
|Scope of measurement||-30..+80°C||with an inside temperature sensor - LB-522T|
|-100..+200°C||with an outside temperature sensor ( special) - LB-522TX|
|-200..+550°C||with an outside temperature sensor ( special) - LB-522TXE|
|Measurement resolution||0,1°C||in the scope -199,9...+199,9°C|
|1°C||outside of the scope -199,9...+199,9°C|
|RECOMMENDED CONSTANT WORK CONDITIONS *)|
|Scope of temperatures||0..40°C|
|Scope of humidity||20..80%|
|Level of environment corrosion aggressiveness accord. w/g PN-71/H-04651||B|
|POWER SUPPLY, MECHANICAL DATA|
|Power supply source||3,6V / 2,1 Ah||inside power supply - lithium battery|
|5...28V DC, 1 mA||optional outside power supply - emulation LB-710
|Work time from a battery||5 / 10 years||measurement period: 1 minute / 1 hour|
|Overall dimensions||110 x 65 x 28 mm||casing material ABS|