VDL (E3) 09/2019 Page 37/234
Risk Measures
Unnoticed sensor drift or failu-
re of safety devices due to
missing or delayed mainte-
nance and tests
• Perform regular maintenance and the prescribed tests of the cham-
ber.
• Create detailed maintenance and testing plans and ensure they are
implemented.
This list is NOT exhaustive. The risks result from the risk assessment to be done by the operator (Chap.
2.1). The measures must be determined by the operator of the device based on the risks determined and
the respective conditions at the installation site.
2.7 Testing and maintenance
The operator must ensure that the chamber is always in a technically functional state.
Observe the maintenance intervals specified by the manufacturer. If there is above-average strain, the
intervals must be shortened accordingly.
The operator must regularly verify that the safety-related devices are functioning correctly.
Document tests with results and measures that were potentially initiated, as well as maintenance and
repairs, in a system book.
For testing before commissioning, see Chap. 7
For recurring tests and maintenance, see Chap. 26
2.8 Operation log
For safety reasons, keeping an operation log which documents each individual drying process is recom-
mended.
The following contents should be entered and recorded:
• Type of solvent
• Auto-ignition temperature of the solvent; in the case of solvent mixtures: solvent with the lowest Auto-
ignition temperature
• Entered temperature set-point (drying temperature)
• Drying temperature set-point
• Set safety controller mode temperature (Limit/Offset)
• Set safety controller value
• Date
• Signature
Use the following page as a specimen or compile it in a suitable form.
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