'micro-set'

UKAS Quality Management

1st Point Assessment

'Micro-set'



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	Micro-set Flanged Sphere Detector (standard model) [Click Here to Download] 465KB

	Micro-set’ sphere detector Retro Fit (custom) [Click Here to Download] 99KB

	ATEX Certificate No: Sira 03ATEX1127X [Click Here to Download] 347KB

Enhanced repeatability in excess of the requirements of Chapter 4, API Manual of Petroleum Measurement Standard, means greater control on metering accuracy.

Field replaceable without the necessity for recalibrating the prover ensures less downtime and fewer fees to pay.

ATEX Certified for use in potentially explosive atmospheres - ATEX II2 G, EEx'd' IIB T6.
Certified by Sira Certification Service on certificate number:Sira 03ATEX1127X

Versatile fitting the same unit being suitable for 3" to 30" pipe up to ANSI Class 600 pressure rating enables standardization to be achieved.

Stainless steel wetted parts make the unit suitable for use with most products.

Options
Certification to NACE MR-01-75
Flushing facility for viscous and waxy products
Retro-fit to existing provers

The 'Micro-set' meter prover sphere detector was originally designed and developed in 1982, to satisfy a requirement for a 3" ball prover for butane and propane. A requirement which no existing proprietary unit could meet.

The secret of the 'Micro-set's exceptional repeatability is in its use of a reed switch capsule and the method by which it is calibrated. Setting the switching position is achieved by use of a fixture to pre-load the plunger; the switch capsule is turned down until electrical contact is made, whereupon it is locked in position.

Any 'Micro-set' sphere detector that is set correctly using the same setting fixture can be exchanged in a pipe prover without significantly changing the base volume. Calibration tests undertaken by Moore, Barrett & Redwood, the international calibration specialists, on a four detector 10" prover loop produced the following results:

Test No.	Flow Rate Litres/min	Base Volume SI Litres	Repeatability
1	350	1727.732	+ 0.0025%
2	350	1727.833	+ 0.007%
3	200	1727.725	+ 0.0015%
4	350	1727.716	+ 0.0045%

'Micro-set'

'Micro-set' and Setting Jig

'Micro-set'

Test 1
Detectors A and B preset prior to calibration runs, to establish the initial base volume.
Test 2
Detectors A and B removed. Detector A replaced by detector B, and a new detector C substituted in the previous position of detector B.
Test 3
As Test 2, but at a reduced flow rate.
Test 4
Detector C replaced by detector A
from Test 1.

The total spread of results from the four tests was only 0.0068%.

'Micro-set' meter prover sphere detectors have shown themselves repeatable and reliable on NGL, butane, propane, refined petroleum products, and crude oil. The detectors have performed well on hot, heavy, waxy crude oil, and special flushing ports can be incorporated to enable cleaning during shut-down in extreme circumstances.

It is not only on new meter provers that the operator can benefit from the 'Micro-set' sphere detector, a series of models allows retro-fit for many existing makes of sphere detectors reaching the end of their useful operating lifetime.

Technical Specification

Pipe diameter: 3" to 30" inclusive
Pressure class: ANSI 600# &1500#
Materials:
Wetted parts: Stainless steel
'O' rings: Viton
Hazardous area classification: ATEX II2G, EEx'd' IIB T6
ATEX Certificate No: Sira 03ATEX1127X

	Options:

	Flanged weld-on boss	Certification to NACE MR-0 1-75	Flushing port
	Retro-fit to existing fittings	Setting fixture	Spare parts kit

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