Inspection Plan For Water-Mixed Cooling Lubricants - Optimum OPTidrill DH 40CT Betriebsanleitung

6.4.1

Inspection plan for water-mixed cooling lubricants

Company:
No.:
Date:
used cooling lubricant
size to be checked
noticeable
changes
pH value
Usage concentration
Base reserve
Nitrite content
Nitrate/nitrite content
of the preparation water, if
this is not removed from
the public
grid
1)
The specified inspection intervals (frequency) are based on continuous operation. Other operational
conditions can result in other inspection intervals; exceptions are possible in accordance with Sections 4.4
and 4.10 of the TGS 611.
Editor:
Signature:
EN Coolant lubricating
92
Inspection methods
Appearance, odour
Laboratory techniques
electrometric with pH meter
(DIN 51369)
Local measurement method:
with pH paper
(Special indicators with
suitable measuring range)
Manual refractometer
Acid titration in accordance
with
Manufacturer's
recommendation
Test sticks method or
laboratory method
Test sticks method or
laboratory method
Translation of original operating manual
Inspection Procedure and comment
intervals
daily Find and rectify causes,
e.g. skim off oil, check filter, ventilate cooling
lubricant system
1) if pH value decreases
weekly
> 0.5 based on initial filing:
Measures in accordance manufacturer's
recommendations
> 1.0 based on initial filing:
Replace cooling lubricant, clean cooling
lubricant circulation system
1) Method results in incorrect values with tramp
weekly
oil content
as required Method is independent of tramp oil content
1) > 20 mg/L nitrite:
weekly
Replace cooling lubricant or part
or inhibiting additives;
otherwise NDELA (N-nitrosodiethanolamine)
in the cooling lubricant system and in the air
must be determined
> 5 mg/L NDELA in the cooling lubricant
system:
Replacement,
clean and disinfect cooling lubricant
circulation system, find nitrite source and, if
possible, rectify.
as required Use water from the public grid if there is
water from the pubic grid has
> 50 mg/l nitrate: Inform the waterworks
Version 1.0.1 - 2021-07-06