User's Manual Part 1

THE READALL INTERROGATOR User Guide
Revised January 2001
Page 31 of 62
In this case, the meter reading process begins again for this meter.
Reading TRACE Meters
Once either of the READ buttons have been pressed, or the touch screen has been pressed
in the customer and meter area, the ReadAll begins the reading process. For TRACE
meters, the ReadAll interrogates the transponder whose serial number is shown on the
Read Screen.
Performing a TRACE read is a two step process: first the ReadAll must determine the
receive channel that the transponder will use. Once the channel is determined, the
ReadAll can interrogate the meter and listen on the channel for the response.
A number of possible results can occur when a transponder is interrogated.
• The transponder receives the transmission and sends its meter reading response,
which is received by the ReadAll successfully. The ReadAll reports a successful
reading.
• The transponder receives the transmission and sends its meter reading response,
but the ReadAll does not successfully receive it. The ReadAll reports no response
received.
• The transponder receives the transmission and sends its meter reading response,
but the ReadAll is too far away for the transmission to be received given the
current conditions. The ReadAll reports no response received.
• The transponder is too far away to receive the transmission. As a result it does
not respond. The ReadAll reports no response received.
• The transponder receives the interrogation but has lost its programming or has not
yet been programmed. The transponder sends its current state as a response. The
ReadAll successfully receives the response and reports a Corrupt Data response
received.
Note that each successful meter reading response includes the meter reading and the
current Tamper status.
In the event that no response is received, one of following conditions has occurred.
• The ReadAll is too far away from the transponder for the transponder to receive
the interrogation signal.
• The transponder receives the interrogation signal from the ReadAll but, because
the ReadAll’s transmission power is greater than the transponder’s, the ReadAll
was not close enough to the transponder to receive the signal.