FLUID COMPONENTS, INTL
CHAPTER 2 - INSTALLATION
Model ST98 Flow Meter
2 - 2
Doc. No. 06EN003291 Rev. A
Prepare or Verify Flow Element Location
Prepare the process pipe for installation or inspect the already prepared location to ensure that the instrument will
fit into the system.
Mount the flow element at least 20 diameters downstream and 10 diameters upstream from any bends or
interference in the process pipe or duct to achieve the greatest accuracy.
Verify Dimensions
The ST98 Insertion Models have an adjustable insertion length ferrule until it is locked into position. Verify all
dimensions before locking the fitting in place. See the appropriate figures in Appendix A.
Note:
Two types of ferrules are available. One type of ferrule is made from Teflon. This can be tightened and
loosened repeatedly at different places on the flow element. The other type of ferrule is made from
Stainless Steel. This ferrule can only be tightened in one place on the flow element. The Stainless Steel
Ferrule makes an indentation into the flow element for a more firm fit.
The ST98 In-Line Model's flow element has a tube or pipe length and diameter that is specified at the time of
order. This dimension should be double checked with the process line.
Verify Flow Direction for Flow Element Orientation and Placement
The insertion ST98 flow element comes with flat areas machined on the flow element near the enclosure end of the
flow element. Etched on the flow element is a flow arrow indicating the direction of flow. See Figure 2-1.
Align the ST98 flow element during installation so the flat areas are parallel to the direction of the process media
flow, and the flow arrow points in the direction of process media flow.
A flow direction arrow is etched on the in-line ST98 tube or pipe and should be pointing in the direction of flow.
Failing to install the flow element correctly will reduce the accuracy of the flow meter.
Verify The Serial Number Of The Flow Element and the Electronics
The ST98 flow element has a serial number near the flat machined area or flow arrow. The same number is on the
main electronics circuit board, and on the tag of the electronics enclosure. These numbers have to match because
the flow element and the electronics are a matched set. Failure to observe serial numbers will cause inaccurate
readings.
Figure 2-1. Model ST98 Insertion Flow Element (Remote) Showing Orientation
