User manual

GPX Pro Manual49
© 2012 XT Racing
So, you may use a linear analog input for this device. You are prompted for two calibration points
-- at point one, you input the voltage (0.5V) and output value (0), and at point two, you do the
same (voltage 3.7, output value 2000). That's all there is to it. You may now acquire data on this
channel and the "readout" will be the pressure in psi.
1.8.5 Alarms
Temperature and switch inputs may have alarm(s) associated with them.
For a temperature channel, you may have one or two alarms set: one alarm may be set for the
temperature exceeding a specified temperature, and another may be set for the temperature
falling below another specified temperature.
For a switch input, you can specify that the alarm occurs either when the switch is at a low voltage
(below the calibration voltage) or a high voltage (above the calibration voltage).
Alarm conditions will cause notification on either the main screen of any of the modes, or during
the running ("spinner") screen for Circuit and Point-to-point modes. (An alarm will not occur
during a drag race since the race lasts such a short period of time.)
When an alarm condition occurs, the screen will flash with the channel name and the value:
The screen will flash between its normal display and this alarm condition as long as the alarm
condition occurs.
1.8.6 General DAQ Notes
When you change the type of a channel, all parameters will default to a default state, and the
name will be changed to a default name.
When you change the type of a channel, it will automatically be “de-calibrated” (i.e., there will be
no calibration set for that channel). When a channel is not calibrated, that channel will not be
captured, even if it is enabled. The channel must be calibrated in order for data acquisition to
occur for that channel. (There is one exception to this rule: if a channel is defined as type “raw”,
it cannot be calibrated, but even so, it is captured if enabled.)