Checking The Leak Rate; Measuring The Leak Rate Using A Concentration Meter - Weh TK16 H2 Operating Instructions Manual

11. CHECKING THE LEAK RATE

Please note: Subsequent mentions of descriptions and position numbers refer to
Chapter 3. Product overview / product description on page 10.
11�1

Measuring the leak rate using a concentration meter

- A concentration meter can be used to determine whether the WEH
tight. Please observe these following instructions when using such a device for leak
testing:
Figure 9
- If the measured leak rate exceeds 1,000 ppm, dismantle the WEH
it to WEH for maintenance.
- Gas detectors are not suitable for measuring a technical leak rate due to technical
requirements. Therefore, a gas detector can only be used as an indicator. The limit
value of 1,000 ppm should therefore be regarded as a guideline and not as an absolute
limit.
- Having to send the WEH
mean that the WEH
leak can only be determined by carrying out measurements using the appropriate
instruments.
Î
Check the WEH
sure. The necessary prescribed safety measures must be observed.
- Please observe the following instructions if you are using our WEH
with a fueling station for liquid fuels:
Î
First determine the background value of the fueling station at a distance of one
metre from the WEH
Î
Subtract the measured background value from the measured actual value on the
WEH Product.
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Î
Follow the procedure described above if the resulting value still/actually exceeds
1,000 ppm.
Î Use a gas detector for flammable gases for this purpose.
Î Prior to this check, be sure to purge the WEH
with nitrogen or compressed air at the following areas
(Figure 9):
- complete product from the outside
- interior of the guide bush (Pos. 1)
Î Make sure that you maintain a distance of 10–15 cm from
the components of the WEH
Product to WEH for inspection does not automatically
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Product is leaking or defective. The exact rate and relevance of a
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Product for leakage using operating medium under operating pres-
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Product.
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Operating instructions
Product is leak
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Product .
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Product and send
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Product at a site
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MD-10286-L51-R1.0.0-07
AE
Product
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