Configuring the PI pressure transmitters

moneo | configure

moneo | configure is a user-friendly software package that enables easy programming and visualization of all ifm IO-Link enabled sensors (V1,0 and V1.1) as well as other manufacturers' IO-Link enabled sensors (V1.1). The software can be downloaded here: moneo | configure.

moneo | blue

moneo | blue is an app that runs on your Apple or Android smart phones and provides access to all parameters, process values and diagnostics from all sensors connected to an IO-Link master. The Bluetooth adapter EI0330, connects to one port of the IO-Link master and the app can be downloaded free of charge from the Apple App Store or from Google Play.

Onboard pushbuttons

The sensor can be set without any additional tools or software using the integrated display and pushbuttons. This is a convenient option to interact with the device in the field or when a PC is not available or IO-Link and Bluetooth are not installed.

Display and indications

The PI pressure transmitter displays system pressure. Indications:

• LEDs 1...6 indicate selected units of measure for pressure process values
• LED 7 indicates switching status of OUT2 (on if output 2 is switched)
• LED 8 indicates switching status of OUT1 (on if output 1 is switched)
• 9: Enter [E] button to enter the programming menu and confirm the parameter setting value
• 10 and 11: Arrow keys up [U] and down [D]
• 12: 4-digit alphanumeric display for indication of process values, parameters and parameter values

General use of pushbuttons

1. Press Enter (E) once to enter programming mode.
2. Press Up or Down arrow (U/D) to view parameters or additional menus.
3. To change setting, press Enter (E) and then Up or Down arrow (U/D) and hold until the progress bar completes.  Then press Up or Down arrow (U/D) to toggle through options.
4. When desired value is reached, press Enter (E) to confirm the setting.

Common programming features

All of ifm's process sensors, including the PI series pressure transmitters, use similar terminology for programming. We highlight the features used most often here. Refer to the Operating Instructions manual found under the "Downloads" tab at the product datasheet page for more details on these and other features.

Switching outputs

• Hno -- hysteresis normally open: Output turns on when the set point (SP) is reached and stays on until the pressure drops below the reset point (rP)
• Hnc -- hysteresis normally closed: Output turns off when the set point (SP) is reached and stays off until the pressure drops below the reset point (rP)
• Fno -- window normally open: Output turns on when pressure is between the high limit (FH or SP) and low limit (FL or rP)
• Fnc -- window normally closed: Output turns off when pressure is between the high limit (FH or SP) and low limit (FL or rP)

Analog outputs

• ASP -- analog start point:  Pressure where the analog signal equals 4 mA 
• AEP -- analog end point:  Press where the analog signal equals 20 mA 
• MAW -- initial value of the non-scaled measuring range
• MEW -- final value of the non-scaled measuring range
• UL – Under Limit. Pressure below -200% MAW if min pressure range is not full vacuum
• OL – Over Limit. Pressure above 105% of MEW

The chart shows how the analog signal and display information changes when the pressure is above / below the scaled or non-scaled measuring ranges. This feature is useful in for your process control and troubleshooting issues.

If the measured value is outside the measuring range or in the event of an internal error, the current signal indicated in the following figure is provided. The analogue signal in case of an error is adjustable:

• [FOU] = On defines that the analogue signal goes to the maximum value (21.5 mA) in case of an error.

The minimum scaled measuring range is available on the product datasheet.

Scale the analog signal using pushbuttons:

1. Press E to enter programming mode.
2. Press D until "ASP2" analog start point for output 2 (pressure) is displayed. Press E to confirm.
3. Press U/D to enter the value representing the analog start point (4 mA). Press E to confirm setting.
4. Press D until "AEP2" analog end point for output 2 (pressure) is displayed. Press E to confirm.
5. Press U/D to enter the value representing the analog end point (20 mA)
6. Press E to confirm setting.

Note that the minimum distance between ASP and AEP is 20% of the full measuring range of the meter.

Calibration and verification

ifm's PI pressure sensor is an all-in-one transmitter and does not require calibration in the field prior to use.

Factory calibration

Each pressure sensor is factory calibrated during production to offer excellent performance out of the box.

• During production the sensor electronics go through 5-point calibration (0, 25, 50, 75, 100% of measuring range)
• Calibration is verified by testing 100% of the devices at the end of production. Information from the calibration verification during production can be found in the Factory Certificate provided by ifm.
• Download a free factory certificate from our website. Be sure to have the serial number of the sensor to enter.
• The certificate also includes accuracy of the digital (IO-Link) measurement.

Field calibration

ifm pressure sensors come ready to use out of the box but can also be adjusted in the field to match a known value or calibrated reference device. The two main parameters that can be adjusted are the Zero Point Calibration [coF] and Calibration Gain [CGA]. The customer specific calibration changes the curve of the measured values in the sensor compared to the real process value.

Zero Point Calibration [coF] and [tcoF] adjusts the complete measurement up or down in a linear fashion by the percentage entered. This function can be used to adjust for a constant offset in the sensor that can be seen when there is zero pressure applied. The internal zero reference is shifted by this value.

• [tcoF] can be used to automatically teach the zero-point calibration. Make sure there is no pressure applied to the system.
• The zero calibration can be manually adjusted from -5%...+5% of the final value of the measuring range and it is calculated by subtracting the known value (P1) from the measured value (P2) and dividing that by the final value of the measuring range (VMR).

[coF] = (P2 - P1) ÷ VMR x 100

Calibration gain [CGA] adjusts the measurement curve gradient of the sensor to match the pressure of a known value or reference sensor.

The gain can be adjusted from -5%...+5% of the final value of the measuring range and it is calculated by dividing the known value (P1) by the measured value (P2).

[CGA] = (P1 / P2 – 1) x 100

Note: If [coF] and [CGA] are changed the analog output will change accordingly.