Burkert 8746, Operating Instructions Manual

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21
Technical data
Type 8746 Profibus, 8746 Analogue
6.5 Product materials
Tab. 8: Product materials, common to all product variants
product part material
Base block
•
Aluminium
•
Stainless steel 1.4305
Housing Aluminium
Seal Refer to the Type label
Product status indicator Polycarbonate
Parts in contact with the
fluid (sensor)
1.4404, Al
2
O
3
, PPS GF40, e poxy
resin, silicon, silicon nitride
Tab. 9: Specific materials of an MFC with proportional valve
Parts in contact with the
fluid
1.4310, 1.4113, 1.4305
Tab. 10: Specific materials of an MFC with motor valve
Parts in contact with the
fluid
1.4310, 1.4305, Al
2
O
3
, PPS GF40,
PEEK
Tab. 11: Specific materials of an ATEX product variant
Impact protection-cover Stainless steel 1.4301
6.6 Dimensions, weight
→ Refer to the data sheet of the related product.
6.7 fluid data
6.7.1 Mass flow Meter
Tab. 12: Fluid data, MFM
Calibration fluid Operating gas or air
Mass flow-rate range
(reference to N2 (I
N
/min))
20...2500 I
N
/min
Exact range depends on the product base-block size and on
the gas used. Refer to the datasheet related to the product
Type.
Measuring range
1:50
Larger measuring range
available on request.
Repeatability ±0.1% of the full scale
Operating fluid See Type label
Measurement accuracy, after
15 minute warm-up time and
with the calibration fluid
± 1.5%
5)
of the measured value
± 0.3%
5)
of the full scale
Response time < 500 ms
5) If the operating fluid is different from the calibration fluid, then the
measurement accuracy can be lower. If the operating gas is nitrogen
or oxygen , then the given measurement accuracy is correct. But if the
operating gas is natural gas , then the measurement accuracy may be
different because the composition of natural gas varies depending on the
season and origin.
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