HEKA PG 310, Руководство пользователя

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8 Description of the Hardware
2.1.4 Hot-Swappable
Another advantage of the USB based
PG 300
data acquisition interface is
that it can be installed or removed while the computer is running. Just plug
the device in, use it, and unplug it when done. There is no need to power
down the computer. The
PG 300
is self-enumerating and self-identifying.
The device driver is dynamically loaded when connected and dynamically
unloaded when unplugged.
2.1.5 Expandability
If an application requires more channels than are available on a single
PG 300
, then multiple units can be connected and fully synchronized. Each
PG 300
unit requires a dedicated Hi-Speed USB 2.0 port and an external
cable connection between the units. This external connection is used to
synchronize the acquisition clocks of the units and is made with a standard
CAT5 patch cable. A single external trigger will start the multiple units
simultaneously. Please note that
PG 300
interfaces installed on separate
computers can also be synchronized in the same manner. The number
of units that can be installed is only limited by the number of available
Hi-Speed USB 2.0 ports.
2.1.6 DC Characteristics
PG 310 PG 390
Counter Electrode:
Compliance Voltage ± 20 V Compliance Voltage ± 20 V
Output current
±
2 A Output current
±
1 A
Continuous Power:
20 W 90 W
Resolution current monitor: 0.02 % of full range
Resolution voltage monitor: 1 mV
Input specifications (reference electrode):
impedance: 100 G Ω in parallel with 1.5 pF
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