FILTER TELEGRAPH – Output BNC reporting the filter setting in use. Telegraphs range from
0.2 to 2.0 V in 0.2 V steps as shown below.
Filter telegraph settings
SYNC OUT – Sync out provides a TTL pulsed output for synchronizing an oscilloscopes or
other equipment with the internally generated 50/60 Hz TEST PULSE or SPEED TEST
signal.
Rear panel connectors and controls
In addition to input and output BNC’s, the instrument rear panel also contains the
headstage cable connector, calibration trimmers, and selector/function switches for PSTAT
and SPEED TEST modes.
Headstage cable connector – The headstage connects to the instrument via an 8–pin DIN
connector.
PSTAT switch – The PC–505B is converted to operate as a potentiostat for voltammetric
measurements by a clockwise rotation of this switch. When switched on, the front
panel PSTAT indicator LED will light. In this mode, the maximum electrode voltage
hold potential is increased to ± 1 V and the COMMAND IN attenuator is modified to
allow command inputs up to ± 2 V.
SPEED TEST is used to re–adjust the rear panel boost trimmers, normally only required
when replacing a headstage. These adjustments are factory set for the headstage
supplied with the instrument.
CMR, BOOST, and GAIN trimpots are factory set. User adjustment may be required if a
headstage is replaced. Adjustments instructions are provided with the new
headstage.
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