Emerson IFT9701 - Manual (Page 60)

52 Model IFT9701 Transmitter Instruction Manual
Configuration with ProLink II Software continued
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.
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.
CAUTION
Failure to zero the flowmeter at initial startup could
cause measurement error.
Zero the flowmeter before putting the flowmeter into
operation.
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.