PC-505B Manual, Rev. 201013
Warner
Instruments
A Harvard Apparatus Company
18
SETUP AND INITIAL TEST
Line voltage
Power line voltage requirements for the
PC-505B
are specified on the serial number
nameplate attached to the chassis rear. They are wired for either 100-130 VAC or 220-240 VAC
at either 50 or 60 Hz. Check to be sure the
PC-505B
is wired for the line voltage and frequency to
be used.
Instrument grounding
The power cord is fitted with a three-prong grounding type plug and should be plugged into
a properly wired three-wire grounded receptacle. This internally grounds the
PC-505B
chassis to
the power receptacle ground and insures safe operation of the equipment.
Headstage precautions
The
PC-505B
headstage is a high-impedance, static-sensitive device as noted on the
protective envelope in which it is shipped. The device can be seriously damaged by static
discharge or inadvertent grounding. Therefore, to insure proper operation and long life, we
recommend you follow these precautions:
1.
Always discharge static electricity from your body before handling the headstage.
Your body has a capacitance of around 100-200 pF to ground and can acquire enough static
charge (by handling Styrofoam, touching the face of a video monitor, walking across a dry
carpet, wearing polyester clothing, etc) to alter your electric potential by as much as 10 kV
relative to ground. A discharge of this magnitude through the headstage can render it
useless. We recommend that you electrically discharge yourself either by firmly contacting
a securely-grounded part of the setup with a lightly moistening a finger, or by wearing a
grounded wrist strap available from any electronics store.
2.
Do not ground or apply a low-impedance signal the headstage input connector pin.
3.
Do not ground the headstage case when the power is on. This includes allowing the
headstage case to inadvertently contact any grounded components, This is necessary since
the case is both isolated from ground and is driven at the command potential.
4.
Two 1 mm pin jacks are provided on the side of the headstage for grounded and/or driven
shield applications.
The circuit ground pin jack is insulated from the case and is identified by a black collar. It
is intended to be used for the bath ground and/or shielding around the electrode and holder.
It is not intended as a general equipment ground
.
The uninsulated pin jack makes direct contact with the headstage case and is driven at the
command potential. It can be used to drive any additional guard shielding such as a foil
covering or conductive paint applied to the pipette electrode.
Insure that the guard shielding
never touches ground.
