Fluid Components International ST98, ST98L User Manual

INSTALLATION, OPERATION AND TROUBLESHOOTING GUIDE FLUID COMPONENTS INTL

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Document 06EN003310 Rev. -

ST98 Installation, Operation and

Troubleshooting Guide

Step 1. Pre-Installation

A. To get the best results from the instrument, the sensor should be located 20 pipe diameters downstream from any

flow disturbance (valve, pipe elbow, etc.) and 10 pipe diameters upstream from any disturbance.

The instrument tags show the model number, tag number (if noted on the customer’s order), serial number along
with other important safety information. Compare this information with the appropriate pipe installation drawings
and calibration sheets to verify the instrument is the correct configuration.

Tag Location - Between Conduit Ports
On Integral or Local Enclosure

If the instrument is a remote configuration, the serial number on the enclosure tags must match. The recommended tag
number on the local enclosure will have an FT in the tag number. The recommended tag number on the remote enclosure
will have an FE in the tag number. (Tags are specified by the customer, “FE/FT” is a recommended naming convention .)

B. Verify the serial numbers on the enclosure(s), flow element and electronics match. The instrument may not work if the

serial numbers are miss-matched. (The remote option has a remote transmitter enclosure (FT) and a local flow
element enclosure (FE). The integral option has one enclosure.)

Flow Element Serial Number
Also Showing Flow Arrow
(Located near the FE enclosure.
It is also on the enclosure tag.)

C. Recommended installation/troubleshooting tools are an open-ended wrench to fit the NPT connection, an open-

ended wrench to fit the flanged fitting nuts and bolts, a small flat blade screw driver for manipulating potentiometers,
both a medium flat blade screwdriver and a medium phillips head screwdriver for tightening connections, 3 mm allen
wrench for CENELEC approved instruments, a measuring tape for proper flow element placement, and a DVM for
Ohm/Voltage measurements.

Doc. No. 06EN003310 Rev.

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Electronics Serial Number

(Located on the circuit board with the larger I.C.
chips. It is also on the transmitter’s (FT) enclosure tag.)

1 Model ST98 Flowmeter

Tag Location - Top Side of
Remote Enclosure Option

FLUID COMPONENTS INTL INSTALLATION, OPERATION AND TROUBLESHOOTING GUIDE

Step 2. Flow Element Installation

Install the flow element, with the flow arrow (shown on Page 1) in the direction of media flow. The element should be in the center line

of the process pipe or rectangular duct. The flow arrow flat area is to be parallel ±2° with the media flow. If the remote transmitter option

is used, the serial number of the flow element is to match the serial number of the electronic enclosure.

Compression fitting option: Metal Ferrules (hard seal) can not be readjusted after the fitting has been tightened. Teflon ferrules

(soft seal) may be readjusted after the fitting has been tightened (but not overtightened).

To insert a compression fitted flow element into the process, measure the inner pipe or duct diameter. Divide the measurement by

2, then add 1 inch (25 mm). Add the pipe wall/fitting thickness to the measurement. Mark the flow element with this measurement. Insert

the element into the process, up to this mark. Tighten the male portion of the fitting into the process. Use appropriate thread sealants.

Tighten the female part of the fitting until the element doesn’t move and there are no leaks. Torque varies per application.

Below are the most common instrument mounting options shown in a typical customer process. See the Installation Section in the

ST98 Manual, Document Number 06EN003291 for more details.

Flanged Integral Instrument (Cylindrical Enclosure) NPT Integral Instrument (Cylindrical Enclosure)

Flanged Remote Instrument (Cylindrical Enclosure) NPT Remote Instrument (Cylindrical Enclosure)

Mode ST98 Flowmeter 2 Doc. No. 06EN003310 Rev. -

INSTALLATION, OPERATION AND TROUBLESHOOTING GUIDE FLUID COMPONENTS INTL

Step 2. Flow Element Installation (Continued)

Flanged Integral Instrument (Box Enclosure) NPT Integral Instrument (Box Enclosure)

Flanged Remote Instrument (Box Enclosure) NPT Remote Instrument (Box Enclosure)

In-Line Integral Instrument (Box Enclosure) In-Line Remote Instrument (Cylindrical Enclosure)

Note: Not shown; In-line Remote Carbon Steel Enclosure or In-Line Integral Aluminum Enclosure.

Doc. No. 06EN003310 Rev.

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3 Model ST98 Flowmeter