ETS-Lindgren HI-3520 Microwave Monitor (Archived) - Manual (Page 13)

HI-3520 Manual Page 9
or 100 measurements), the running average of all
measurements taken will be displayed. After six minutes,
each "new" measurement will replace the measurement
taken 363.3 seconds prior to the "new" measurement.
Therefore, the average of the most recent 100
measurements will always be displayed.
The average of the latest 100 measurements is also
compares by the unit to the alarm warning level set by
the operator (section 3.6) to determine the % ALARM
LEVEL ratio. (During the first six minutes of operation,
the running average of all measurements taken will be
compared by the unit to the alarm warning level set by
the operator to determine the % ALARM LEVEL ratio.) If
the % ALARM LEVEL ratio reaches 100%, the unit's
alarm circuitry will be activated, the red LED and the
ALARM annunciator on the LCD will flash every 3.6
seconds, and the audible alarm will sound every 3.6
seconds.
3.10 "Instantaneous" Measurement Mode
When the INST annunciator on the left side of the LCD
display area is visible, the measured power density is
sampled and displayed every 1.8 seconds. (Note that the
Model HI-3520 saves data for six minutes regardless of
the display selected. Switching between "Average" and
"Instantaneous" does affect the data being stored.)
3.11 Latched Alarm
A feature of the unit's alarm system is that the beeps and
flashes are progressive. Once the alarm level has been
reached, the unit will indicate a single beep and flash
each 1.8 second with the "INST" annunciator displayed
or 3.6 seconds with the "AVG" annunciator displayed.
Should the unit detect a field that exceeds the preset
alarm level, the unit will start to beep and flash. The
Archived 4/2/10