Schneider Electric Pressure Transmitter IAP50S-T

Ensure the transmitter is stabilized at the final operating temperature.

Is the FoxCalTM feature enabled?

Apply pressure equal to or near the LRV and enter the pressure for the lower trim point.

Apply pressure equal to or near the URV and enter the pressure for the upper trim point.

Perform a single point calibration (zeroing) with a nonzero pressure input if desired.

Check if the underrange and overrange output values extend beyond 4 and 20 mA, respectively.

Verify required tools are available

Remove the device from online operation

Override the milliamp output to the High Failsafe setting of 21.0 mA

Confirm the mA output corresponds to 21.0 mA using the milliamp meter

Override the milliamp output to the Low Failsafe setting of 3.6 mA

Confirm the mA output corresponds to 3.6 mA using the milliamp meter

Return the device to normal operation

Transmitters with the Optional Display

Unlatch the external zero button by turning it 90 degrees counterclockwise

Check for possible messages on the display

Relatch the external zero button by turning it 90 degrees clockwise

Set or reset using the optional display

Apply zero pressure to the transmitter or use a bypass valve to equalize pressure

Press the external zero button until the display reads CAL AT0, then release

Wait for the display to read AT0done to complete calibration

Apply the lower range value (LRV) pressure to the transmitter

View the total days the transmitter has been in service using the 1 Device Setup > 2 Calibration > Time in Service Meter menu selection.

View the user days since the last reset using the 1 Device Setup > 2 Calibration > Reset User Days menu selection.

Reset the user days to zero if necessary.

Perform a two-point calibration if FoxCalTM is enabled.

Rezero the transmitter output once it has stabilized at the final operating temperature.

Check the underrange and overrange output values to ensure they extend beyond 4 and 20 mA, respectively.

Ensure the transmitter is in linear mode (DP transmitters only)

Disable FoxCalTM if performing a two-point calibration

Confirm that changing LRV does not affect URV and vice versa

Apply minimum pressure corresponding to new LRV