Fluke Biomedical 451B - Manual (Page 21)

Ion Chamber Survey Meter
Operation
11
Self-Test
When the Survey Meter is first turned on, it runs through a functional self-test
procedure. During this self-test, the firmware version of the Survey Meter is
displayed, along with the HI or LO chamber bias.
 Warning
For safe operation and maintenance of the product, note the
chamber bias from the self-test. If chamber bias is LO, the
Product cannot measure high radiation rates accurately. The
Product requires service, contact Fluke.
If the Survey Meter passes the self-test, it goes into the normal operating mode.
If the Survey Meter fails the self-test it remains locked with the firmware revision
displayed. Contact Fluke for corrective action. See the How to Contact Fluke
section in this manual.
Installation
The Survey Meter periodically tests for mark signal at its RS-232 port. When an
RS-232 signal is detected, the Survey Meter sends test signals using its sending
device and, if RS-232 is present and operational, the Survey Meter enters into
the communications mode. The display clears and the letters “CO” display as an
indication that the Survey Meter is in the communications mode.
The Survey Meter is compatible with a CRT or printing terminal that has a
standard RS-232 connector and a 1200-baud rate. A computer with a modem or
terminal emulator can be used in place of the terminal. Set up the terminal or
computer for 1200 baud, 7 data bits, no parity bit, and 1 stop bit.
1. Connect the 9-pin female connector to an active communication serial port.
2. When “CO” appears on the Survey Meter display, press the computer or
terminal space bar twice.
If the Survey Meter displays the “CO” message but there is no response at the
terminal after pressing the space bar twice, perform the following tests:
• Be sure that the Survey Meter and terminal are properly connected via the
RS-232 cable.
If there is still a problem, consult Fluke for further instructions. See the How to
Contact Fluke section in this manual.