Download OPERATING INSTRUCTIONS AND SYSTEM DESCRIPTION FOR

BA-03X User Manual
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CURRENT RANGE unit
The CURRENT OUTPUT unit consists of (8) CURRENT RANGE LED and (9)
CURRENT RANGE switch
(8) CURRENT RANGE LED
The CURRENT RANGE LED indicates the setting x10 (±120 nA) of switch (9) (LED:
ON).
(9) CURRENT RANGE switch
Switch for setting the CURRENT RANGE of the amplifier: x1: max. ±12 nA into 1 G,
x10: max. ±120 nA into 100 M
HOLDING CURRENT unit
The HOLDING CURRENT unit consists of (10) HOLDING CURRENT
(nA) potentiometer and (11) + / 0 / - switch (holding current switch).
(10) HOLDING CURRENT (nA) potentiometer
With this control a constant current (holding current) can be generated (ten turn
potentiometer, clockwise), calibrated in nA (Imax = 10 nA or 100 nA, dependent on setting
of CURRENT RANGE switch #9). The polarity of the holding current is set by toggle
switch (11).
(11) + / 0 / - switch (holding current switch)
Switch to disable holding current generation or to set the polarity of the holding current
(+: current positive, 0: holding current disabled, -: current negative).
(12) BIAS (bias current) potentiometer
10 turn potentiometer for setting the output current of the headstage (headstage
BIAS current) to zero (ten-turn potentiometer, symmetrical, i.e. 0 pA = 5 on the
dial), range: 200 pA (CURRENT RANGE: x1), (see chapter 7.1).
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