WPI Bridge-8, Инструкция по эксплуатации

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ISDB
World Precision Instruments 7
Introduction
The Iso-DAM8A is a modular bioamplifer designed for use with the Iso-DAM8 chassis,
which can accommodate up to 8 modules. The Iso-DAM8A input stage is differential
and is isolated from the AC power system. For example, there is no electrical
connection to the AC power circuit ground. Isolated pre-amplification has important
advantages over non-isolated amplifiers:
• There is no significant current can flow from the preamplifier input terminals
to ground. Therefore, input connectors are intrinsically safe and cannot
cause electrical shock at the site of measurement.
• Problems caused by “ground loops” are eliminated.
Electrodes or other signal sources may be connected directly to the Iso-DAM8A
input connector, or an optional active headstage (WPI Part #74040) may be used.
The headstage connects to the Iso-DAM8A through a 5-foot cable. It contains a
high impedance differential amplifier in a small metal housing. Electrodes may be
connected directly to the headstage, which can be positioned at the measurement
site, minimizing electrical noise pickup and stray capacitance.
The Iso-DAM8A module contains an input DC offset adjustment, switch-selectable
gain, switch-selectable high pass and low pass filters, a line frequency “notch filter”
(which can be set to 50 or 60 Hz), and an output DC position adjustment.
The Iso-DAM8 chassis can be ordered for either 110-120VAC or 220-240VAC
operation. The chassis can accommodate up to eight Iso-DAM8A bioamplifiers. A
separate BNC connector is provided for the output of each channel, and all channel
outputs are available at a common DB-25 connector.
Notes and Warnings
CAUTION : The inputs to the Iso-DAM8A and the headstage can be damaged
by electrostatic discharge. We recommend that you momentarily touch the
Iso-DAM8A chassis or any grounded metal object before connecting wire or
electrodes to the inputs.
Unpacking
Upon receipt of this instrument, make a thorough inspection of the contents and
check for possible damage. Missing cartons or obvious damage to cartons should be
noted on the delivery receipt before signing. Concealed damage should be reported
at once to the carrier and an inspection requested. Please read the section entitled
“Claims and Returns” on page 15 of this manual. Please contact WPI Customer
Service if any parts are missing at 941.371.1003 or customerservice@wpiinc.com.
Returns: Do not return any goods to WPI without obtaining prior approval (RMA
# required) and instructions from WPI’s Returns Department. Goods returned
(unauthorized) by collect freight may be refused. If a return shipment is necessary,
use the original container, if possible. If the original container is not available, use a
suitable substitute that is rigid and of adequate size. Wrap the instrument in paper or