Fluke Biomedical 451P - Manual (Page 26)

451P
Operators Manual
16
The operation portion of the firmware performs all of the control functions needed
to read and control the electrometer and range change amplifier, calculate
radiation rate, and display the calculated values on the LCD Display. In addition,
the measured data are smoothed and displayed in an exponential manner with
time that simulates the rise and fall time of an ordinary meter display. Range
changing is performed automatically. If a large increase in signal is detected, the
range changing skips to higher ranges bypassing exponential rise with time to
get to the new reading quickly. The Survey Meter continually integrates the
detected radiation signal and saves the accumulated amount that may be read
by the operator at any time. The operator may also reset the integration process.
When the RS-232 cable is attached to the Survey Meter, the Survey Meter
detects its presence and runs the communications portion of the program. The
communication parameters are 1200, N, 7, and 1. Serial communications are
performed in software rather than using a hardware device. The operation
program can be run from communications in the Test mode.
Maintenance
Very little maintenance is required for the Survey Meter, but some periodic
attention may be necessary, especially if the Survey Meter is used in harsh
industrial conditions.
 Warning
To prevent possible electrical shock, fire, or personal injury:
• Do not operate the Product with covers removed or the
case open. Hazardous voltage exposure is possible.
• Use only specified replacement parts.
• Have an approved technician repair the Product.
• Only assemble and operate high-pressure systems if you
know the correct safety procedures. High-pressure liquids
and gases are hazardous and the energy from them can be
released without warning.
• Many components on the printed circuit board are static
sensitive. Obey all ESD precautions when you touch the
printed circuit board assembly.
Routine Cleaning
Do not immerse the Survey Meter. The Survey Meter is not waterproof; liquid
could damage the circuits. The Survey Meter should be kept clean and free from
dirt and contamination. To clean the Survey Meter, wipe with a damp cloth using
any commercially available cleaning or decontaminating agent.