Emerson IFT9701 instruction manual To perform the auto zero procedure

Configuration with ProLink II Software continued

CAUTION

Failure to zero the flowmeter at initial startup could cause measurement error.

Zero the flowmeter before putting the flowmeter into operation.

To perform the auto zero procedure:

1.Prepare the flowmeter for zeroing:

a.Install the flowmeter according to the instructions in this manual.

b.Apply power to the meter, then allow it to warm up for at least 30 minutes.

c.Run the process fluid to be measured through the flowmeter until the meter temperature approximates the normal process operating temperature.

2.Fill the flowmeter completely with the process fluid under normal process conditions of temperature, density, pressure, etc., and ensure zero flow through the flowmeter.

3.Close the shutoff valve downstream from the meter.

CAUTION

Flow through the flowmeter during flowmeter zeroing will result in an inaccurate zero setting.

Make sure fluid flow through the flowmeter is completely stopped during flowmeter zeroing.

4.Open the Calibration menu and click on Zero Calibration. The Flow Calibration dialog box appears (depicted in Figure 7-5).

5.Make sure flow through the sensor is completely stopped, then click the Zero button. The flowmeter begins zeroing. While zeroing is in progress:

-The Calibration in Progess status light is red.

-The transmitter’s diagnostic LED remains ON.

-The transmitter’s optional display reads “ZERO0” for up to one minute during zeroing.

When flowmeter zeroing is completed:

-The Calibration in Progress status light turns green.

-The transmitter’s diagnostic LED blinks once per second to indicate normal operation.

-The display indicates the flow rate.

52 Model IFT9701 Transmitter Instruction Manual