Operation; External Controls; On/Off Button; Mode Button - Fluke 481 Operator's Manual

Operation

The following sections describe the operation of the Survey Meter.
To prevent possible electrical shock, fire, or personal injury, do
not put metal objects into connectors.

External Controls

There are two external controls on the Survey Meter: an ON/OFF button and a

MODE button.

ON/OFF Button

Press the ON/OFF button to turn on the Survey Meter. All the elements in the
display turn on and the microprocessor runs through an initialization procedure.
Part of the procedure includes reading the calibration coefficients stored in
EEPROM. If an EEPROM read error occurs, an error code (E1) displays at
power-on and unity calibration coefficients are used.
The bar graph and digital display will show a reading that decreases as the
Survey Meter stabilizes. The initial reading usually starts in the 50 R/h
(50 mSv/h) range and decreases through the lower ranges to a reading of less
than 0.5 mR/h (5 μSv/h) within 40 seconds. When the elements in the display
turn off, with the exception of those necessary for normal operation, the user can
begin the measurement process.
Background fluctuations may occur (less than 0.5 mR/h (5
returning to the original reading typically in less than 3 seconds.
Mode Button
To configure the MODE button to the opposite function without the RS-232
connection, use the following procedure:
1. Turn off the Survey Meter.
2. Press the MODE button.
3. Turn on the Survey Meter while continuing to press the MODE button.
4. Release the MODE button when the display is in the "all elements on"
condition.
5. Use the MODE button to toggle the Survey Meter between the rate mode and
the newly selected Freeze or Integrate mode.
 Warning
Note
Ion Chamber Survey Meter
μ
Sv/h))
Operation
9