Jung J630D, Manual

Page: 228 / 316

J630D
222 26.7.02 7. Accessories
Rules for a long coolant life
• Doe not leave the coolant standing for long periods of time; ideally, it should be
circulated continuously.
• Do not throw foreign bodies, such as oil, food left-overs, cigarette ends etc.,
into the coolant.
• Do not dilute used coolant with pure water.
• The emulsion temperature should not exceed 30°C.
Measurements
Carry out the measurements below at regular intervals.
Coolant emissions
A standard limit value, along the lines of the maximum allowable concentration at
the place of work, is not defined, owing to the complex composition of the coolant.
The following tolerances are specified for the ambient air by the BIA (Institute for
Work Safety of the Employer's Liability Insurance Association).
Interval Measurement Limit value Result
Daily
Concentration
See manufacturer’s
specifications
Concentration too low =
risk of corrosion
Concentration too high =
machine becomes mis-
ted and sticky
Weekly
pH value 8.5 - 9.5
Value too low = risk of
corrosion and microbial
contamination
Value too high = skin irri-
tation
Nitrate content Less than 50 mg/l Increased risk of cancer
Nitrite content Less than 20 mg/l Increased risk of cancer
Monthly
Bacteria count,
yeast / fungus
Less than 10
4
- Odour
- Reduced protection
against corrosion
- Skin irritation
- Inflammation
- Reduced filtration and
chip removal effective-
ness
Bacteria count,
other bacteria
Less than 10
6
See above
Interval Measurement Limit value Remarks
Nitrosamine
1 microgram/m
3
Official recommended
concentration. Must not
be exceeded under any
circumstances.
Aerosol concentration
5 mg/m
3
Hazard from toxic sub-
stances
Sum of aerosol and
vapour concentration
20 mg/m
3
Hazard from toxic sub-
stances