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.

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 base Trendsetter VLF.

2 This is a startup command and requires a Fluke digital pressure meter (90-1188A). which is used to calibrate the main (ese) pressure sensors. Uncalibrated sensors may be up to 5 psi out. If a pressure sensor is replaced then it will be neccessary to recalibrate the sensor.

a) Turn on the Fluke meter. Press the “zero” button.

b) Connect the pressure meter in to a ¼” T or Y off the pressure sensor.

c) Adjust the machine system pressure regulator to 80.0 +/- 0.2 psi on the Fluke.

d) Turn the air pressure off at the releaving valve at the intlet to the filters.

e) Turn the air back on and make sure that the pressure is stable an still at 80 +/-0.2 psi

f) type “cal pressure sensor 80 creo”.

g) Follow instructions on monitor. When it has completed make sure that is says calibration successful.

Applies To:

• Trendsetter_VLF

Syntax:

Notes:

'al aoff 1' is the main system pressure offset The nvs al aoff is not editable. A number relating to the scaleing factor is saved in 'al mpsc' which are not editable. Zero is no scaling aoff may be positive or negative.

See Also:

• Command:
• NVS: al ppsc
• NVS: al aoff