Digi Cell Plus - Digital Oil Test Cell Information Guide
36
GB
Results
Symptom
Possible Cause
Possible explanation and Solutions
Results unrepeatable
Unclean instrument
Dirt or leftover reagents / oil from last test. Before starting
testing, the insides of DIGI+ and sample cup must be
clean and dry (particular attention should be paid to the
O-ring and threaded surfaces).
Contamination
Poor sampling
For consistent results, same sampling routine should
be followed with same time period be-tween taking the
sample and measuring on DIGI+. The sample bottle
should be shaken before taking a sample with a new
pipette or syringe.
Reuse of syringe
Use a new syringe for each test due to cross-
contamination issues.
Water used to clean
DIGI+ inside
Water, water-based cleaning products or other solvents
must not be used as these may cause damage.
Results lower than
expected
Not enough reagent
added
Ensure EasySHIP reagent is above 18 °C and entire tube
is emptied into the sample cup.
Sample oil and / or
reagent volume incorrect
All test ranges need different volumes of oil sample and
reagents. Using too much oil can give too high pressure.
Note volume of oil before retesting.
DIGI+ sensor fault
DIGI+ should be checked by conducting a test with no
oil added. 1 drop of water should be added before
starting the test. 200 ppm to 10000 ppm range should be
selected and the result should be above 200 ppm.
For DIGI+ BN only, new oil should be used for testing or
calibration performed with a high BN oil, checking that
DIGI+ records a pressure.
Results higher or lower
than expected
Sample oil and / or reagent
volume incorrect
On-screen instructions should be followed as the
100 ppm to 3000 ppm range needs 35 ml reagent and
15 ml oil whereas the 0.1 % to 20.0 % range needs 20 ml
reagent and only 0.25 ml oil.
Oil has changed
significantly
Verify result by retesting.