Advertisement
ADS-14221, PPT2 User Manual
READ CONTINUOUS PRESSURE
For continuous pressure readings (factory default rate = 5 per second) enter the following command:
*01P2<cr>
$*99IN<cr>
CHANGE TO A NEW READING RATE
Enter the following command:
*01WE <cr>
*01I=M200<cr> This sets the integration time to value M200, which corresponds to an output reading
The reading rate will change to one every 2 seconds. I= is an abbreviation for Integration time, which determines
how long to accumulate corrected pressure values between readings. Each integration period gathers the data for
one pressure reading output (see Section 4.2 What is integration?). The range of integration times can be set by
specifying readings per second (I=R50 for 50 readings/sec) or in 10 millisecond intervals (I=M600 for 6 seconds).
The factory-set integration time is 200 milliseconds or 5 readings per second (I=M20).
The output data rate can also be altered by use of the idle count (IC) command or by changing the operating
mode (OP) command. See Section 5 for description of these commands.
REPEAT THE READ CONTINUOUS PRESSURE STEP ABOVE
Notice the slower output rate of one reading every 2 seconds.
TRY OTHER COMMANDS
Experiment with other commands to become familiar with the command structures. A short overview of each
command with input and response examples is shown in Section 3 Command Summary. See Section 5—
Commands for complete command descriptions. Until an SP=ALL command is executed, no changes will be
stored in the PPT2 EEPROM. Re-apply the power or send an IN=RESET command to revert to the settings last
saved in EEPROM.
This enables a continuous stream of compensated pressure readings to flow into the
terminal program.
This is the best way to stop the continuous pressure reading commands. The '$'
character temporarily stops, or suspends, the digital output of the PPT2. The *99IN
command stops the continuous pressure or temperature readings.
This enables the PPT2 RAM to accept a changed parameter.
every 2 seconds.
October, 2016
8 of 85
Advertisement
