Air Pressure Sensor Zero Calibration and Parameter Check

In this article, we will explain:

● Why the air pressure sensor may need to be re-zeroed periodically.

● How to check the factory settings.

● How to reset and calibrate three different sensor models.

 

Why Is Zero Calibration Necessary?

Air pressure sensors are sensitive electronic components that measure pressure based on very small internal signal changes.

During normal operation, factors such as:

● Ambient temperature changes

● Seasonal weather variations

● Altitude differences

● Long-term component drift

● Transportation and installation conditions

may cause the sensor's standby reading to gradually shift from its original zero point.

As a result, the displayed pressure value may show a small offset even when no air pressure is being applied.

This is a normal characteristic of pressure sensors and does not indicate a defect.

To maintain accurate pressure monitoring, we recommend periodically checking the sensor reading and performing a zero calibration whenever necessary.

 

Before Calibration

Before performing zero calibration, please make sure:

1.  The machine is powered on.

2.  The sensor is in standby mode.

3.  No air pressure is applied to the sensor.

Let's only perform the calibration when the sensor is under true zero-pressure conditions.

Besides, some sensors have lock and unlock feature to avoid accidenty press and change. Please unlock the sensor button for the check and reset. And please lock the buttons after all is done.

Other Setting varification:

During normal machine operation, maintenance, or cleaning, some sensor settings may be accidentally changed. This can cause abnormal machine behavior, pressure alarms, or incorrect pressure readings.

If you experience any of these issues, please follow the steps in below form and/or the documents attached at the bottom, or the videos below to verify and restore the correct settings.

Note: After entering the menu page (SET page), usually press SET (S) button to change pages, press Up or Down button to switch setting in a certain page, press and hold SET (S) button to enter or exit menu page. For details please check the attached documents at the bottom.

​

Note: Three different air pressure sensor models have been used across different production batches. Please identify the sensor installed on your machine by comparing it with the images below, then follow the corresponding setup video, instructions, and documentation for that model.

Air Pressure Sensor Zero and Parameter Setting Calibration Operation Video Tutorial

Pressure Sensor Model	Product Appearance	Calibration Video
SMC
AirTac
Yihda

Air Pressure Detector Settings	Yihd	Airtac	SMC
Model	WEW02-N-KHR	DPSN1-10020	ISE20-N-M-L
Lock&Unlock	Press and hold the SET key and ∨ keys simultaneously to lock or unlock	/	Press and hold the SET key for 6 seconds, ignoring the SET interface at 2 seconds and the F0 interface at 4 seconds (if present). After entering the oPE interface, press the ∧ or ∨ key to switch between UnL and LoC. Finally, press the SET key to confirm and exit.
		/
Clear the reading	Press and hold the ∧ and ∨ keys simultaneously for 5 seconds, under unlock state (if applicable).
OUT1 Model	oUt1：EASY	ot1：EASY	oUt1：HYS	F1
OUT2 Model	oUt2：EASY	ot2：EASY	/
			/
Output Status	nonC: 1o2o	noC: 1o2o	lot: 1_P	F1
Output Response Time	rES: 100	SPd: 100	dt1: 100	F1，Set
Output Color	Clor: G-on	Clr: G-on	CoL:1SoG	F1
Air Pressure Unit	UnIt: PSI	Unt: PSi	Unit: PSi	F0
Set Pressure Detection Value (Short-press SET, then use ∧∨ keys to adjust)	P-1: 0.3	1-P: 0.3	P_1: 0.3	F1，Set
Set Pressure Detection Value (Short-press SET, then use ∧∨ keys to adjust)	P-2: 0.3	2-P: 0.3	H_1: 0.3	F1，Set

Still need help?

For specific technical questions or help requests, please open a Ticket with picture or video, so our Support team can assist you ASAP.

For the information provided in the ticket, please refer to this link：

Help Tech Support Troubleshoot Faster

End.

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