VICI D-2-I - Manual (Page 34)

30
UNATTENUATED OUTPUTS
Normally connected to a data acquisition system or other recording means.
The two unattenuated outputs are 0 - 10V full scale and 0 - 1V full scale.
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.
ZERO FUNCTION
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.
Electrical Connections
CAUTION: Do not use a wrench to tighten the SMC
connectors on the bias and electrometer cables.
Connections should be finger tight only.
1. Referring to Figure 10 as necessary, connect the bias and electrometer
cables as follows: the BIAS-B cable to the top electrode (closest to the
discharge electrodes), the electrometer cable ( ELECT) to the middle,
and the BIAS-A cable to the bottom electrode. This setup is the same
for both detector models.
The bias outputs supply high voltages when power is applied to the unit,
and caution should be observed when connecting or disconnecting these
cables.
The full-scale input current of the electrometer is determined by the
RANGE switch. Input voltages in excess of 15 VDC may result in
damage to the electrometer.
2. Connect the high-voltage cable from the detector to the pulse supply, and
connect the pulse supply cable between the back of the controller and
the pulse supply.
3. Connect the heater cable from the detector to the back of the controller.
This connector is identical in function to the one on previous controllers,
so that detectors can interchange between revisions of controllers; how-
ever, the location has moved inline with other connectors in the newest
version of the controller.
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.
Appendix