This No.1900 timegrapher is a precise mechanical watches test instrument, it is used for multi-testing by watch manufacturers and watch technician.Features:The frequency diagram of the watch can be displayed on the LCD screen.According to different watches, the instrument will automatically adjust the optimal signal level during the test.The instrument will automatically calculate the rate deviation, amplitude, be-at error, and display them by the data in real time; select "99.9s/d" at item rate ranges for result display, which can make the accuracy of rate deviation up to 0.1s/d.For the conventional be-at, the instrument can automatically respond; for the special be-at, can manually select.The sampling period can be selected by 2 seconds, 4 seconds, 6 seconds, 8 seconds, 12 seconds, 20 seconds, 30 seconds, 60 seconds, and the average value of corresponding period will be regarded as the precise value of the watch.Six kinds of testing positions can be adjusted, and the simulation sound can be played in the speaker or mute.Specifications:Plug: EU-plug, US-plug, AU-plug (optional)Main material: ABSColor: grey+blackMeasuring possibilities: rate deviation, amplitude, be-at error of mechanical watches and diagram recording of the be-at noise.Rate deviation measurement:Measuring ranges: 999s/d or 99.9s/dResolution: 1.0s/d or 0.1s/dAmplitude measurement:Measuring ranges: 100~360Resolution: 1Measuring of the be-at error:Measuring ranges: 0.0~9.9 msResolution: 0.1 millisecondsLift angle:Measuring ranges: 30~70Default value: 52Measure positions: 1-6 positionsLine length: 480 pointsMeasuring times periods: 2/4/6/8/12/20/30/60 secondsLanguage: Chinese, English, JapaneseDisplay: color LCD graphic monitor, 480*272 pixelsWorking environment: 10~40Relative humidity: 0~80% RHItem size: 185 * 120 * 40mm / 7.3 * 4.7 * 1.6inItem weight: 337g / 11.9ouncePackage size: 230 * 210 * 195mm / 9.1 * 8.3 * 1.6inPackage weight: 1379g / 3.0lbPacking List:1 * Timegrapher1 * Timegrapher Sensor1 * Power Cable1 * User Manual