Operation
3-5
Gain Adjustment for Best Measurement
The SIGNAL LED will be illuminated when the input signal
level is above 45 mV. The higher the level, the brighter the
LED will be. When measuring fairly stable signals, it is
recommended to increase the gain until an overload is
indicated, reduce the gain by 10 dB and reset the latching
overload. If no further overloading is indicated, this should
be a good setting.
If using the Model 2221 for repeatable non-steady signals,
such as recording the output during a machine cycle, it is
recommended to make several test runs in order to find the
highest gain setting which does not produce an overload
during the complete measurement period.