Description:

1 Used to set the system pressure according to the internal pressure sensors.

2 Used to set the calibration factor of internal pressure sensors.

3 Use to test the customer air supply.

4 Used to cross calibrate sensors.

1) Cal pressure will instruct the user to turn off the system air pressure at the filter regulator unit, when it has sensed the pressure low and stable it takes a reading of the sensor zero pressure value and this becomes the offset saved in al aoff [] array. The user is then asked to turn the pressure on and adjust it down to 3 psi lower that the set point. This is because a regulator must always be set by adjusting upwards and never backed off, to achieve accuracy. The user is then asked to increase the pressure slowly until the pressure reaches the set point for the machine, at which point the instruction will change from "adjust up" to "HOLD". The firmware will then check that the pressure is stable and within tollerance. Machines with a beeper will beep faster as you approach the ideal set point and then stop beeping.

The set point for TSVLF AL is 84 psi and the customer machine spec into the machine is 90 psi (621 KPa) at the same time as 20 cfm (66 l/m) is flowing.

Cal Pressure sensor: For Autoloader.

2) New method using Omega pressure transducer. This is a startup command and requires a service tool 90-1189A. This tool must be marked with a calibration code. Connect Omega calibrated pressure transducer to J3 of Picker Genine.

This is a startup command and requires a precision digital pressure meter which is used to calibrate the main (ese) and picker pressure sensors (TSVLF AL). Uncalibrated sensors may be up to 5 psi out. If a pressure sensor is replaced or a Genine is replaced (TSVLF AL) then it may be neccessary to recalibrate one or both sensors.

Sensor or board replacement. & Cross calibrating sensors.

Applies mainly to (TSVLF AL). If a machine was running with main and picker pressure sensors and either a sensor or picker genine gets replaced then it is possible to calibrate the new sensor to match the remaining sensor, assuming that the remaining one is still accurate. (It is preferable to check this with a digital pressure meter) or Omeger transducer. 'cal pressure sensor picker [password]' will adjust the picker sensor scale factor so that it reads the same as the main sensor. Use this when replacing the picker pressure sensor or picker genine. 'cal pressure sensor main [password]' will adjust the main sensor scale factor so that the mains reads the same as the picker. Use this when replacing the main sensor or engine satellite board.

3) A rough test of the adaquicy of he customer's air supply can be done using cal pressure flow on/off. This will bleed air at approx 20 cfm but anyway at the peak flow required by that specific machine and firmware. The machine must be fitte with a gauge BEFORE the regulator. You must read at least 90 psi all the time for 2-3 minutes while cal pressure flow is on. Try this several times through out the shift or for a longer period of time.

Applies To:

• Trendsetter_VLF_Auto

Syntax:

Notes:

'al aoff 1' is the main system pressure offset and 'al aoff 5 is the TSVLF AL picker pressure offset. The nvs al aoff is not editable. A number relating to the scaleing factor is saved in 'al ppsc' and 'al mpsc' which are not editable.

See Also:

• Command: cal picker
• NVS: al ppsc
• NVS: al aoff