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SANBORlJ DUAL CF.AlHiEL..DC AMPLIFIER
140DEL 150-2000
3.
OPERATION:
GE JERAL PROCEDURES
There are three basic procedures in operating the Dual Channel DC
Amplifier:
STARTING:
CALIBRATION:
OPERATION:
This includes the warmup period and connecting the
signal.
See paragraph
4.
An accurate recording depends on proper calibration.
The standard procedure is given.
See paragraph 5.
After starting and calibrating, the operation is
straight-forward.
See paragraph
6.
4.
OPERATION:
STARTIHG THE DUAL CRAN1-JEL DC Ai'iPLIFIER
1.
Set each RANGE switch to OFF and each
P01"~R
switch to ON.
Allow
5 minutes warmup for best stability.
2.
Connect each signal with Amphenol 2-contact plug, Sanborn
Ho.
10B2-1~i.
Terminal 1 is the signal terminal, and terminal 2 is
ground.
Note that the signal source impedance must be small in
comparison with 1.15 megohms if the source impedance is to be
neglected.
5.
OPERATION:
CALIBRATIFG TliE DUAL CHA;mEL DC AHPLIFIER
1.
After warmup, make available an accurately measured d-c calibration
voltage between two volts and 200 volts as convenient, from a source
having the same imnedance as the signals to be recorded, if this
impedance is not negligible with respect to 1.15 megohms.
2.
Set the RANGE VOLTS/CM switch to approximately half the calibration
voltage.
3.
Apply the calibration voltage, and adjust the GAD: control for a
deflection represented by the formula:
Deflection
=
~~bratio~
voltage
E sethng
2
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