Fluke Victoreen 451P, Руководство оператора

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Victoreen 451P & 451P-DE-SI
Operators Manual
2-2
2.1.3 Freeze Mode
When configured to select the Freeze mode, the MODE button acts as a toggle switch. Press the button
until FREEZE appears on the display. Operation in the Freeze mode gives the user a constant reference
of the highest exposure rate obtained from the time the freeze function is initialized. The highest reading
will appear as a single bar on the bargraph. The current reading will continue to be displayed on the
digital display and the bargraph. If a measurement is obtained which exceeds the freeze bar reading, the
freeze bar will move to the higher measurement point. The operating range of the 451P remains locked
on the highest range attained during the Freeze mode so that the scale and the multiplier remain the
same.
For example, assume the scale units appear as 10, 20, 30, 40, 50, and the freeze bar is at 47 mR/h on
the bargraph. If the 451P then measures a radiation field of 120 mR/h, the scale units will change to 100,
200, 300, 400, 500 and the freeze bar will appear on the graph at 120 mR/h. If the survey meter
measurement goes below 100 mR/h, the units on the scale will not change until the survey meter is taken
out of the freeze mode. However, the digital display will continue to show the current reading. The
survey meter will operate in the Freeze mode until the user toggles the MODE button to return to the
normal operating mode.
2.1.4 Integrate Mode
The Integrate mode is operational 30 seconds after the instrument is turned on and all of the time after
that. However, the integrated exposure can only be displayed when the MODE button has been
configured as a toggle to display exposure rate/integrated exposure. If the MODE button is pressed
within the 30-second initialization period of the unit, the display will read “0”. When integration starts, “0.0
μR” will be displayed. Toggle MODE to read exposure rate as required. To reset the integration display,
toggle the display from the Rate mode to the Integrate mode. Keep the MODE button pressed for about 5
seconds. The display will clear, and then read “0.0 μR.” Exposures are accumulated up to 99 R.
2.1.5 Self Test
When the 451P survey meter is first turned on, it runs through a functional self test procedure. During this
self-test, the firmware version of the unit is displayed. If the unit passes the self-test, it will go into the
normal operating mode. If the unit fails the self-test, it will remain locked with the firmware revision
displayed. Consult a Fluke Biomedical, Radiation Management Services Repair Coordinator for
corrective action.
2.2 Installation
The Model 451P periodically tests for input at its RS-232 port. The model 451P sends test signals, if the
RS-232 is present and operational, the survey meter will enter into the communications mode. The 451P
display will clear and the letters “CO” will be displayed as an indication that the unit is in the
communications mode.
The RS-232 port is compatible with a CRT or printing terminal having a standard RS-232 connector and a
1200-baud rate. A computer with a modem or terminal emulator may be used in place of the terminal.
The terminal or computer should be set up for a 1200 baud, 7 data bits, no parity bit, and 1 stop bits (i.e.,
7 data bits, no parity, and 1 stop bit). To establish communications, perform the following:
1. Attach the RS-232 cable assembly to the back of the survey meter.
2. When “CO” appears on the 451P display, press the computer or terminal spacebar.