Perform a Tilt Test to check the integrity of the Quartz Bourdon Tube (QBT) sensor.
Ensure that the controller (or monitor) is in the MECHANICAL ZERO screen by this path, MENU||CALIBRATE||ZERO|MECHANICAL ZERO
1. Document the reading
2. Lift the left side up with a 1 to 2 inch (2.5 to 5 cm) block. Wait a few seconds for the reading to settle. Document the reading.
3. Lift the right side up with a 1 to 2 inch (2.5 to 5 cm) block. Wait a few seconds for the reading to settle. Document the reading.
The yellow bar on the display should move, then return to approximately the same value as reading #1 with each tilt. After each tilt, if you see a significant difference in readings from reading #1 (for example >30% change in value) report the values back to Pressure Technical Support as this may be a sign of a damaged sensor.
The official specification on the tilt sensitivity is <= 0.002% FS/degree. Also verify that the power-on self-check passes. You can also do this self-test in the TEST screen.
Here is the same test with specifications
- Change the units on the front panel to “% FS” instead of kPa, Bar, psi,etc.
- Zero the unit through the front panel <Menu>, <Calibrate>, choose sensor, <Zero>.
- Place a ½ inch (1 cm) spacer under the front and back feet on the right side. When the reading stabilizes, it should be less than 0.0010%FS.
- Move the spacers to the front feet of the unit (left and right side). When the reading stabilizes, it should be less than 0.0010%FS.
A link to the same information in a pdf file is below.
The mechanical zero tool information is here if one is needed. Photo with scissors shows how big it is.
Part Number: 3878975
Description: 7250-111,TOOL, PHOTOCELL ADJUST
Parts can quoted or ordered by emailing email@example.com or calling +1-877-355-3225