Emerson 3051S Specifications download pdf (Page 93)

Reference Manual

00809-0100-4001, Rev JA

Section 4: Operation and Maintenance

November 2012

Operation and maintenance

4.5.3 Sensor trim

Note

Use a pressure input source that is at least four times more accurate than the transmitter, and

allow the input pressure to stabilize for ten seconds before entering any values.

Field communicator

To calibrate the sensor with a Field Communicator using the sensor trim function, perform the

following procedure:

1. Assemble and power the entire calibration system including a transmitter, Field

Communicator, power supply, pressure input source, and readout device.

2. From the HOME screen, enter the fast key sequence under “Sensor Trim.”

3. Select 2: Lower sensor trim. The lower sensor trim value should be the sensor trim point

that is closest to zero.

Examples:

Calibration: 0 to 100" H

O - lower trim = 0, upper trim = 100

Calibration: -100 to 0” H

O - lower trim = 0, upper trim = -100

Calibration: -100 to 100” H

O - lower trim = -100 or 100,

upper trim = -100 or 100

Note

Select pressure input values so that lower and upper values are equal to or outside the 4 and

20 mA (1 and 5 Vdc) points. Do not attempt to obtain reverse output by reversing the high and

low points. This can be done by going to “Rerange” on page 53 of Section 3: Configuration. The

transmitter allows approximately five percent deviation.

4. Follow the commands provided by the Field Communicator to complete the

adjustment of the lower value.

5. Repeat the procedure for the upper value, replacing 2: Lower sensor trim with 3: Upper

sensor trim in Step 3.

Traditional 4-20 mA Fast Keys

1, 2, 3, 3

Traditional 1-5 Vdc Fast Keys

1, 2, 3, 3

Device Dashboard Fast Keys

3, 4, 1

1 2 ... 88 89 90 91 92 93 94 95 96 97 98 ... 221 222

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Emerson 3051S Specifications Page 93