Re-Calibration; Repair And Returns - APG PT-400 User Manual

• Re-Calibration

This procedure requires a known pressure source of at least ±0.1% accuracy in order to fully utilize the
accuracy potential of the PT-400. (If not available, you can return it to the factory for re-calibration.)
• Ensure that the transducer is at 0 psig or 0 psia (vacuum if absolute), and adjust zero as per instruc-
tions for zero trimming.
• Apply full scale pressure to the pressure port and adjust the Span ("S") pot (on the right of Figure 3.1)
until the full scale signal is reached.
• Re-check zero and re-adjust the zero ("Z") pot if required
• Repeat previous two steps until no further adjustment is required.
NOTE: You may also return the PT-400 to the factory for repair and/or adjustment.


• Repair and Returns

Should your PT-400 series pressure transmitter require service, please contact the factory via phone, email,
or online chat. We will issue you a Return Material Authorization (RMA) number with instructions.
• Phone: 888-525-7300
• Email: sales@apgsensors.com
• Online chat at www.apgsensors.com
Please have your PT-400's part number and serial number available. See Terms & Conditions
apgsensors.com/about-us/terms-conditions) for more information.
8 Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • sales@apgsensors.com
(https://www.