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Operating Manual
1.2
Safety
Read this manual in its entirety before operating the Model 121 DC Amplifier. Read all wiring and power
hookup instructions and understand the requirements prior to using another manufacturer's products with
the Model 121. Insure that any product being interfaced with the Model 121 is wired according to
prevailing local safety and operational standards before operating.
The following symbols and terms may be found on the Model 121 and its manuals and indicate important
information.
When found on the device, this symbol indicates that the operator should refer to the
manual for important instructions on the proper use of this device. When found in the
manual, this symbol indicates that the reader should understand the implications
contained in the text before operating the device.
This symbol indicates that a shock hazard may be present. Read the instruction manual
carefully and insure that the device is wired properly and that all settings have been
checked prior to applying power to the device.
The WARNING label indicates important information that should be heeded for safe and proper
performance of the device.
The CAUTION label is used to indicate that damage to the power supply or equipment connected
to it could occur if directions are not followed. Warranty could be invalidated if the instructions in
this manual are not followed.
Disassembling the Instrument
Turn Input Power Switch OFF before removing power cable from the instrument.
Remove power cable from instrument before disassembling any part of the
instrument.
Grounding
To avoid electrical shock, the power cord protective grounding conductor must be
connected to power ground.
Fuse Replacement
For continued fire protection, replace fuse only with the specific type and rating by
qualified personnel (Reference Manual "Rear Panel" section). Disconnect the
power cord before replacing fuse.
Measurement Specialties, Inc.
32 Journey, Suite 150, Aliso Viejo, CA 92656 USA
www.meas-spec.com
5 of 19
TM
+1 949-716-5377
t&m@meas-spec.com
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