Setra System Model 470 - Manual (Page 18)

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For example, to subtract 10 from the reading, transmit:
10Z
3. To add an offset to the reading, transmit -, the minus sign, followed by the amount of the
offset, followed by Z, for ZERO. The Setra 470 saves the negative offset as a tare value and
subtracts it from every subsequent reading. In response to an interrogation (Section 4.1) the
470 response contains the letter “T”, for Tared Pressure, rather than “A”, absolute pressure.
For example, to add 10 to the reading transmit:
-10Z
4. To restore the normal reading, transmit -Z, for -ZERO. The transducer sets the tare value
to zero.
5. If you enter a number which results in a reading requiring more digits than are available
in the interrogation response, the unit transmits “OFLO” in response to the next interrogation.
To correct this, transmit -Z, to set the tare value to zero.
4.9 Repetitive Reporting
To record pressure measurements at fixed intervals of time, use the REPETITIVE REPORTING
function. On power-up, the repetitive reporting function is turned off.
1. Transmit the number of seconds desired between readings.
2. Transmit P, for PRINT.
For example, to set up the Setra 470 to print every 10 seconds transmit:
10P
3. The 470 will confirm the command with a response consisting of a carriage return and
line feed, the message “10 sec/reading”, and another carriage return and line feed.
4. The transducer sends updated pressure (or altitude) data every time the specified time
interval has passed since the last update.
5. To cancel repetitive reporting, transmit -P, for -PRINT.
4.10 Reporting Setup Summary
The Setra 470 internally keeps track of the status of all functions which have been activated, and
reports the status in a SETUP summary on command.
The content of the summary report varies depending on which functions are in use. To receive a
summary of the condition of all active functions follow this procedure:
1. Transmit SP, for SETUP PRINT.