Introduction logging devices logging devices is an industrial measurement and control instruments, which can be of various types of sensors, transmitters used in conjunction, can multi-channel temperature, pressure, level, flow, weight, current, voltage, and other industrial process parameters tour detection, alarm control, transmission output, data acquisition and communications. Features universal input function Automatic calibration and manual calibration Multiple protection, isolation design, anti-interference ability, high reliability data logging devices good software platform, with secondary development capacity to meet the special features advanced data logging devices module structure, with a powerful instrument chip, feature set, the system is very easy to upgrade automatic inspection, manual inspection scheduled inspection free to switch the channel switching time and channel number can be set effective temperature detection apparatus main technical indicators basic error: 0.2 % FS ± 1 word Resolution: 1 / 20000,14-bit A / D converter Display: double four LED digital tube, the upper display shows the measured value, the lower display shows the channel number Sampling period: 0.5S alarm output: ⑴1-64 channel unified upper and lower alarm relay output contact capacity AC220V / 3A ⑵1-8 channels are independent alarm relay output contact capacity AC220V / 1A V isolated output accuracy: ± 0.3% FS --300 ~ 9600bps baud free to set internal power supply: switching power supply 85 ~ 265VAC power 4W below