Detailed Product Description

 DIGITAL THERMOMETER

The device technique characteristic:

1)  The device may use environment condition as below:

a)  Temperature: -5~+40°C.

b)  Relative humidity: 50~85.

c)  DC power supply: 6F22 9V one section of laminated cell.

d)  Electromagnetism field interference intensity: 0.6 gauss. Dont evident electric field interference.

2)  Main technique index:

a)  Measuring extent: -50~+150.

b)  Resolving power: 0.1.

c)  Accuracy: ≤±0.5 +3 letter.

d)  Responding time of 0~150: 30 seconds

e)  Shape dimension: 140×80×30mm.

f)  Weight: 500g.

3)  The device necessary accessories equipment:

a)  Temperature sensor is          a                 piece

b)  Certification of inspection is     a                piece

c)  Specification is                a                book

3.  The device work principle:

SW-A type of thermometer is utilized forward voltage of semi-conductor PN junction have negative temperature coefficient, for silicon diode is about -2.1Mv/, that is, temperature each hoist 1 and voltage of junction about decrease 2.1Mv, the change regulation very steady, voltage of PN junction in -50~+150 range and t into linearity relation. Will the relation pass through circuit transform into corresponding DC voltage change, add to digital gauge outfit display to be measuring temperature numerical value.

4.  The device use methods:

1)  Will put temperature sensor into the device input socket.

2)  Turn on device power supply switch.

3)  Will put sonde of temperature sensor in need of measuring temperature point, after temperature steady, device reading number, that is, the temperature of measuring point.

5.  The device safeguard and attention items:

1)  Due to the device measuring range is -50~+150, so sonde of sensor the highest temperature is not more than 150.

2)  Device if dont use for a long term, will should took out battery of inside device, in case battery weeping to loss device.

6.  Guarantee to keep device item:

1)  All leave the factory in a year, non-use and cause out of order by non- person action, the manufacturer free check to repair.

2)  To excess guarantee to keep device date, the manufacturer can provide all in convenience.