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9
RS232 OUTPUT
The RS232 interface serves the purpose of transmitting data to any digital computer via a standard
2 wire RS232 link.
The data includes:
The tritium measurement level, status for level and flow alarms, alphanumeric information
representing location and identification for the instrument.
With a personal computer use Hyper Terminal or another suitable application to view the data.
The COM Port setting should be 9600 baud, 1 start bit, 8 data bits, parity = none, 1 stop bit, and
flow control = none. The tritium monitor is capable of transmitting data only. The data is illustrated
below. There are eight fields with single spaces between the fields. The data string is terminated
with “\r\n”.
The data string appears as shown below followed by an explanation of each field.
:A0F1 000421 uSv/h.. 004199 L0H0 0090 1.10 00000523
Field 1 (A0F1):
: = start character
A = “Alarm” (high tritium alarm)
0 (no alarm) or 1 (alarm)
F = “Flow Alarm”
0 (flow is OK) or 1 (low flow – blocked filter, bad pump, or blockage)
Field 2 (000421): Tritium value
Field 3 (uSv/h..): Tritium unit of measure
Field 4 (004199): Serial number of instrument
Field 5 (L0H0): L = “Low voltage power supply alarm”
0 (voltage is OK) or 1 (voltage is low)
H = “High voltage power supply alarm”
0 (voltage is OK) or 1 (voltage is low)
Field 6 (0090): Approximate percentage of battery remaining (90%)
Field 7 (1.10): Microcode version
Field 8 (00000523): Sequence number