Hyquest Solutions Pty Ltd
Top Set Rod – Model: MagnaRod
© Copyright
- 14 -
Issue 1.03 5 Mar, 2013
character ‘
A
’ after the
MagnaRod
performs and completes the calibration. Note that
invalid or unrecognized commands will result in a ‘?’ being transmitted through the
Bluetooth port.
S
–
Start a measurement:
Begins a measurement at the first contact closure detected.
Number of contact closures and elapsed time counts are accumulated. At the first
contact closure, the
MagnaRod
begins sending the accumulated contact closures
and elapsed time counts through the serial port every second. The first data string
transmitted through the serial port begins the start of the measurement interval with
the meter contact closure count tally and elapsed time tally of ‘0’. Note that when
this command is received by the
MagnaRod
, it automatically performs a
calibration then monitors the input for meter contact closures. Following is the
output data format sent to the externally connected device at the 1-second output
rate:
dnn,xxxx_
d
= preamble for indicating display data
nn
= number of meter contact closures, transmitted in HEX ASCII
(hexadecimal notation)(i.e. 0-9,A-F)
,
= delimiter
xxxx = counts of elapsed time measured as 0.003333 seconds/count,
transmitted in HEX ASCII (i.e. 0-9,A-F) while in Normal mode
and 0.03333 seconds/count while in Slow mode.
_
= space
This data format that is transmitted to the externally connected device can be used
to display elapsed time and velocity while the measurement is being performed.
At the end of the measurement interval or if the ‘
T
’ command is received, the
MagnaRod
sends the last tally of accumulated counts and time in the following
format:
fnn,xxxx
or
enn,xxxx
f
= final data, no detected faults
e
= final data, error detected during measurement;
restart the measurement
The measuring interval is based on the user selected measurement time. When the
measuring interval has been reached, (or the T command is received) the
MagnaRod
, upon the next meter contact closure, will send the final data for that
measurement. If there is no contact closure detected when the measurement
interval has been reached, the
MagnaRod
will continue to send data and the user
must send the ‘I’ command to abort the function. Note that the meter contact
number, nn, is limited to a total of 255 counts (hexadecimal notation ‘FF’). If more
than 255 counts are detected throughout the measurement interval, the count will
rollover to ‘00’ and continue to accumulate counts. No fault condition is set if this
occurs. This allows for continuous counting in excess of 255 counts occurring
during the measuring interval. External processing software can easily detect this
condition and process total meter counts when the measuring interval is completed.
The same condition occurs for the elapsed time tally. This permits an elapsed time
count of 218 seconds for a measuring interval before the count rolls over to ‘0000’.
