Use:
　　WDP500－D/E type grating monocolor instrument uses grating diffraction to obtain monocolor light. It can divide the composite light to monocolor light. It also can do the chemical spectrum analysis if equipped with electron beam exciter, X-ray exciter, photon exciter etc. It also can do physical measure such as determine the delicacy of original, absorbing trait of light filter piece, source analysis etc.
　　Two instruments can be used in series that can increase one times of performance index of distinguish ability and total dispersion.

Instrument spec and main parameter
　　Basic parameter
　　·Wavelength range：200nm-800nm（can extend to 25 um），off axis parabolic lens focus f=500mm
　　·Relative aperture ratio：D/f=1/67
　　·Dispersion count down：1.6nm/mm
　　·Narrow slot
　　　Width range：0.01-3mm continually adjustable
　　　value：0.005mm/meter
　　　Maximum height：25mm
　　·Mainframe weight：20kg
　　　Tech index
　　·Distinguish limit：excel 0.1nm(576.96nm)
　　·Wavelength error：excel ±0.3nm
　　·Wavelength repetition：0.05nm（unilateral）
　　·Instrument stray ray：10^-3，measure at masterstroke (632.8nm)2mm
　　·The scan speed can be adjusted continually：100nm/min-0.005nm/min（can be lower）
　　·The collective interval can be changed：0.0025nm-1nm（can be larger）
　　·Dynamic range reaches over 5 number grades，subsection integral time can be changed　0.004 second-3 second（can be longer）
　　·Measure precision degree：excel 0.4 ％

Characteristic:

　　·The instrument adopts computer control, electric machine drive scan, exact machine modulation, complete photoelectric signal disposal. It has exact wavelength orientation, good recur performance, high distinguish rate, easy operation and agile application.

The computer chooses universal PC compatible series. It has strong anti-jamming performance, wide dynamic range and high exactitude.

The instrument has continuous and adjustable scan speed, freely setting scan region and changeable sampling point interval. It has whole wave scan, subsection scan and exact scan function etc.

　　·The difference between D type and E type is that E type can operate offline.
The instrument can choose multiple grating and relative checking system. The grating is easy to change and it has manual and automatic function. It’s widely used in teaching, scientific research, production unit and chemical spectrum analysis of ing analytical center.

Normal working condition of the instrument：
　　·Room temperature　5℃-35℃
　　·Room relative humidity　not exceed 85%
　　·The instrument should not be shake that affects using. 
　　·There is no caustic gas in the room.
　　·There’s no strong electromagnetic disturbance in the room.
　　·The power supply pressure change can’t exceed 220V±10%
　　·The frequency change can’t exceed 50±1HZ