Compact light instrument, is intended for the measurement and the writing into the memory of the values of illumination beside different time intervals with the aid of the external sensor. Instrument is ideal for the rapid measurement and the writing into the memory of the fluctuations of illumination and to subsequent data processing on PK.

• The wide range of measurement from 2000 to 200000 Lux.
• Large volume of internal storage, to 32000 elements of the data
• Possibility of connection based on PK on the means USB or RS-232 (option) and graphing regarding the obtained values.
• Possibility of the automatic writing of the measured values into the memory of instrument during the long time, through the established time intervals.
• Data remain before the memory of instrument, even when battery is discharged.
• The presence of the function of power of save (savings of energy), function makes it possible to increase the duration of record.

Specification

Model	3640-20
Optical element	Silicone photodiode
Measured ranges	2000/20000/200000 Lux.
Display	[ZHK], 2.00/20.00/200.00 (that to obtain the real measured value necessary value depicted beyond the screen to multiply as far as 1000)
Accuracy	± 4% of chg of [velich]. ± 5 un.
Volume of internal storage and the record	To 32000 elements of data ([vyborok] of the results of measurements).
	Beginning of the record: with the pushing of knob or with the aid of the timer Intervals of the record: 1/2/5/10/15/20/30 seconds, 1/2/5/10/15/20/30/60 minutes.
Duration of the record	Approximately 1 year, with the interval of record 1 minute. With the switch oned function of power of save (savings of energy).
Interface	Infrared optical connection between the instrument and communication line bases 3911-20, 3912-20. The connection between communication line base 3911-20 and PK is achieved with the aid of RS-232. The connection between communication line base 3912-20 and PK is achieved with the aid of USB 1.1
Nourishment of the instrument	LR03 (AA[A]) of alkaline of 4 batteries.
Working conditions	From 0 to 50°[S], relative humidity is not more than 80%.
Sizes and the mass	58 mm altitudes × of 87 mm latitude × 30 mm of thicknesses. Mass: 130 deg.
Accessories	9662 external sensor of illumination (length of wire 2 m) (1)