VICI D-2-IM - Manual (Page 11)

7
ATTENUATED OUTPUT connector
Normally connected to a strip chart recorder. This output has an unattenuated
range of 0 - 10V, and an internal signal reference (-) at zero volts. For best noise
performance, the shield (earth) and signal reference (-) should not be connected
together. The signal from this output is scaled by the attenuation factor set on the
front panel.
UNATTENUATED OUTPUT connector
Normally connected to a data acquisition system or other recording means. For
convenience, a full-scale 0 - 10V output and a 1/10 scale 0 - 1V output are provided,
with an internal signal reference (-) at zero volts. For best noise performance, the
shield (earth) and signal reference (-) should not be connected together. The
internal impedance of these outputs is 1000 ohms. The connection marked ZERO
is a low-true, 5V logic-level input which duplicates the function of the front-panel
ZERO; connection of this input to COM through either a relay contact or logic gate
is equivalent to pressing the ZERO button.
HEATER OUTPUT connector
For connection to the detector heating system.
ELECTROMETER INPUT cable
For connection to the collector electrode of the PD detector. The full-scale input
current is determined by the RANGE switch. Input voltages in excess of 15 VDC
may result in damage to the electrometer.
BIAS A, B OUTPUT cables
For connection only to the bias electrodes of the PD detector in the manner
described on page 15 under the heading “Electrical Connections”. These outputs
supply high voltages when power is applied to the unit, and caution should be
observed when connecting or disconnecting these cables.
NOTE: These terminals are for connection only to
equipment having no accessible live parts. Insulation
of external circuits to which these are connected must
meet the requirements of EN61010 for 220 VDC working
voltage.
Introduction