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BA-01X User Manual
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version 1.9
page 9
Important: The capacity compensation for the electrode does NOT work if the oscillation
shut-off circuit is activated. This may lead to an incorrect reading of the electrode resistance
(see also 31) especially when electrodes with high resistances are used.
(8) CURRENT (nA) display
Display for the electrode current in nA. Scaling is dependent on the position
of the CURRENT RANGE switch (9)
x1: XX.XX nA, x10: XXX.X nA
CURRENT RANGE unit
The CURRENT RANGE unit consists of (9) CURRENT RANGE LED and
(10) CURRENT RANGE switch.
(9) CURRENT RANGE LED
LED indicating the actual current range of the amplifier.
LED ON: BA-01X is in x10 range
LED OFF: BA-01X is in x1 range
(10) CURRENT RANGE switch
Switch for setting the current range of the amplifier: x1: max. ±12 nA into 1 G
Ω
, x10:
max. ±120 nA into 100 M
Ω
HOLDING CURRENT unit
The HOLDING CURRENT unit consists of (12) HOLDING CURRENT
(nA) potentiometer and (12) + / 0 / - switch (holding current switch).
(11) HOLDING CURRENT (nA) potentiometer
Control for generating a constant current (holding current), (ten turn potentiometer,
clockwise), calibrated in nA (I
max
= 10 nA in x1 current range or 100 nA in x10 current
range). The polarity of this holding current is set by toggle switch (12).
(12) + / 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).