DL 1211電流前置放大器

產品簡介：

1211型電流前置放大器是為滿足現代化實驗室技術參數需求而專門設計的。

它能測量范圍在10-2到10-12安培的滿量程靈敏度電流。其動態范圍可達96dB，輸出穩定度優于0.003％/℃，且它的增益穩定度優于0.05％/℃。其經典的模擬電路設計提供了一個不受任何干擾的信號，而不像基于微處理器的多路前面板顯示設計那樣，在高頻情況下會遇到“噪聲干擾”問題。該款寬增益帶寬產品提供了校準功能，并且其前面板上的上升時間可從10μs設置到1s。

SPECIFICATIONS

(Maximum or minimum as applicable unless otherwise noted)

SENSITIVITY. 10-3 to 10-11 ampere/volt with nine decade current gain ranges.

GAIN MULTIPLIER Output gain multiplier varies sensitivity in 3 steps, X0.1, X1.0 and X10, for optimum dynamic range and overload capability.

GAIN ACCURACY ± 2% of reading (10-3 to 10-9 ampere/volt ranges); ± 3% of reading (10-9 thru 10-11 ampere/volts ranges)

INPUT OFFSET CURRENT Less than 0.5X10-13 ampere @ 50 o C. Typically 1Χ10-14 @ 25 o C.

IMPUT VOLTAGE DROP Less than 200 micro volts, 10-5 to 10-11 ampere/volt ranges.

RISE TIME (Low Pass Filter) Front panel adjustable from 10 microseconds to 1 second in a 1-3-10 sequence; MIN position rise time is less than 5 microseconds. Standard rolloff is 12 dB /octave. Jumper option for 6 dB/oct when 1211 is applied in feedback control loops.

OUTPUT. Four outputs (BNC) as follows:

a) 600Ω outputs (2)

b) Lo-Z output (to 25mA, 50Ω)

c) Unity gain output (X1)

OUTPUT LEVEL 22Vpp into l K load (Lo-Z out)

OUTPUT POLARITY Unity gain (X1) Non inverted

Lo-Z (50Ω) Inverted

600Ω Inverted

OUTPUT STABILITY Output voltage offset stability better than 0.003% per o C

ZERO SET Input offset nulling. Used to adjust for precisely zero bias voltage on detectors such as photovoltaic diodes. Alternatively, can adjust for zero d.c. offset on output.

CURRENT SUPPRESSION 10-3 ampere to 10-10 ampere with eight decade ranges: front panel vernier (10-turn) allows a continuous suppression with 0.1% resolution. Stability is better than 0.02%/ o C or day (10-3 to 10-8 ampere); better than 0.2%/ o C or day (10-9 to 10-10 ampere).

DETECTOR BIAS Zero to ±5 volts, adjustable and polarity- selectable with rear panel vernier ?10-turn? and switch. Stability is 100ppm/o C.

GATING TTL-compatible logic 0 or switch closure to ground ?rear panel BNC input? provides gated operation of preamplifier signal path; maximum gating frequency is 5 kHz.

POWER 100 to 130 or 200 to 260 VAC ?switch selectable?, 50-60 Hz, 10 watts.

DIMENSIONS 90Χ242Χ385 (3.5 inch high Χ 9.5 inch wide Χ15 inch deep)

WEIGHT: 3.7kg (8 lb 2oz) less Battery pack

OPPORATING TEMPREATURE 5 o C to 50 o C.