SPECIFICATIONS
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111
Chapter 9
Zap
Amplitude
+1.3 V
DC
at pipette for chosen duration.
Duration
0.5-50 ms or Manual. Triggered by front-panel pushbutton. In Manual position ZAP
amplitude is maintained as long as pushbutton is depressed.
Command Potentials
Seal Test
5 mV command at line frequency (voltage clamp mode)
50 pA (current clamp mode, β = 1) or 500 pA (current clamp, β = 0.1).
External Commands
Two separate BNC inputs, one front switched, one rear switched.
Sensitivity
FRONT-SWITCHED: 20 mV/V in V-CLAMP, 2 ÷ β nA/V in I-CLAMP,
disabled in TRACK and I=0.
REAR-SWITCHED: 100 mV/V in V-CLAMP, 2 ÷ β nA/V in I-CLAMP,
disabled in TRACK and I=0.
Input impedance
10 kΩ. Inputs may be connected in parallel to increase sensitivity.
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