Fluid Components International ST110, ST112, STP110, STP112 User Manual

VeriCal™ In-Situ Calibration
Operation Manual

ST110, ST112, STP110, STP112

Thermal Mass Flow Meter

Fluid Components International LLC (FCI). All rights reserved.

This document contains confidential technical data, including trade secrets and proprietary information which is the property of Fluid Components International LLC (FCI).
Disclosure of this data to you is expressly conditioned upon your assent that its use is limited to use within your company only (and does not include manufacture or
processing uses). Any other use is strictly prohibited without the prior written consent of FCI.

© Copyright 2011 by Fluid Components International LLC. All rights reserved. FCI is a registered trademark of Fluid Components International LLC. Information subject to change without notice.

Notice of Proprietary Rights

ST100 Series VeriCal Operation Manual

Introduction

This manual guides the user of the VeriCal instrumentation through an initial gathering of in-situ baseline data. This baseline line data will then be
compared to data gathered during similar future verification processes to determine if the system is operating within factory specifications.

Theory of Operation

The VeriCal system uses a sonic nozzle to consistently control the amount of compressed air (or nitrogen) injected onto the thermal flow transducer
located on the end of the probe assembly. It is critical to use the same gas for subsequent VeriCal runs to ensure repeatability.

The operating principle of the sonic nozzle requires the total or absolute pressure on the high side of the nozzle to be greater than 20.0 PSIA. The
pressure difference between the high side of the sonic nozzle and the process pressure (low-pressure side of the nozzle) must be greater than 2:1.
When these two requirements are met, a repeatable flow is injected onto the thermal flow transducer.

Setup

FCI Recommends that this procedure be run during the commissioning process of the instrument to determine an initial installed baseline calibration
and to document any installed offset from the factory VeriCal baseline.

Frequency: Every 18 months minimum, every six months is recommended. After the process has been performed a couple times the customer should
determine the required verification frequency based upon the process conditions.

This procedure makes the assumption that the instrument has been installed and is completely functional in the normal operating condition and
orientation. The customer should also have access to the factory VeriCal calibration certificate.

Note: All standard safety procedures must be followed during the verification process. This procedure assumes the standard

packing gland process connection. Your process connections may vary. It is critical to establish a Field Baseline upon
receiving your ST100. This will ensure a greater likelihood of repeatability and establish a history of the VeriCal data.

• Apply the proper input power and allow for a 30-minute warmup. It is critical that the electronics and the sensor be fully warmed and stable
prior to the VeriCal process. Failure to allow the proper warmup time can impact repeatability.

• Loosen the packing nut on the packing gland assembly until the internal packing is lose enough to allow the probe assembly to be retracted out
of the process and is recessed completely into packing gland assembly. Retract the probe assembly completely.

INTERCONNECTING

REMOTE CABLE

REMOTE ENCLOSURE
(SYSTEM ELECTRONICS)

VERICAL BOX

(SHOWN WITHOUT COVER)

PACKING GLAND

ASSEMBLY

ASSEMBLY

WITH 1 1/4 " NPT

LOCAL ENLCOSURE

SONIC NOZZLE

PLUG VALVE
(SHOWN IN
OPEN POSITION)

1/8" FEMALE NPT,

AIR INLET

INTERCONNECTING,
AIR HOSE.

HIGH SIDE
PRESSURE
READING

REGULATOR
ASSEMBLY

BALL VALVE

PROCESS PIPING

RETRACTED
PROBE ASSY

C01061-1-1

Retracted VeriCal Mounting Configuration

Fluid Components International LLC 1

ST100 Series VeriCal Operation Manual

• Level the orientation flat on the probe assembly using a standard bubble level and tighten the packing nut to secure the assembly. To optimize
the repeatability of the verification process, the position and orientation of the probe assembly should be identical every time the process is
performed.

• Attach the regulator assembly with the interconnecting hose to the inlet quick disconnect fitting on the probe assembly if it is not permanently
installed.

• Attach the calibration gas supply, typically compressed air (or Nitrogen), to the inlet side of the regulator assembly. Back out the pressure con­trol regulator. Open the supply valve to the VeriCal pressure regulator box.

• Slowly apply 100 PSIG to the VeriCal setup and verify that the system is leak free using a liquid leak detection fluid on all junction points. This
should also ensure a steady flow across the sensors and remove any debris that might be on the thermowells or the outlet of the VeriCal tube.
Reduce the pressure on the system to 25.0 PSIG.

• Open the ST100 Configurator application via the USB connection to the ST100. Go to the Process Data tab for the appropriate FE (Flow Element).
Be ready to record this information on the In-Situ VeriCal Data Sheet.

Sample of the ST100 Configurator “Process Data”

• The instrument is now in the VeriCal configuration and ready to establish a set of “Field Baseline Data.”

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