11 Checking, Adjusting and Calibrating the Instrument
56
C76IB003EN-E
11.3.3
Performing a High Density/High Viscosity Adjustment
(DMA 5000 M only)
With a DMA 5000 M, you can perform an adjustment at high density and/or at high
viscosity to reach an exceptionally high accuracy for the measurement of high
density values and/or samples with a high viscosity.
For the high density adjustment you need a standard that has a high density
(higher than 1.40000 g/cm
3
), but low viscosity (similar to water).
For the high viscosity adjustment, you need two standards:
•
One standard with a viscosity of approx. 100 mPa
·
s (±5 mPa
·
s) and with
exactly known density (±0.00002 g/cm
3
).
•
One standard with a viscosity of approx. 200 mPa
·
s (±5 mPa
·
s) and with
exactly known density (±0.00002 g/cm
3
).
The adjustment procedure can be aborted by tapping <Cancel>.
1. Tap <Menu> and select
"Checks/Adjustments > Other Adjustments >
Density Module > High Density/Viscosity Adjustment"
.
2. Follow the instructions on the screen.
First an air and water adjustment is performed.
When the adjustment is finished, the following information is displayed:
•
Old Value: Calculated density of water of the previous adjustment.
•
New Value: Calculated density of water with the new adjustment constants.
•
Deviation: Relative and absolute deviation between new and old value.
3. Check the recommendation on the screen and select <Special> if "Apply" is
recommended.
4. For filling the high-density standard and the two viscosity standards, follow
the instructions on the screen.
After the adjustment with the high-density standard, select <Visc.
Standard 1> and after the adjustment with the first viscosity standard select
<Visc. Standard 2>.
Check that the standards are filled without air bubbles.
TIP
If the standard was filled without air bubbles, you can ignore a possible error
message "Density Condition: filling warning" during the adjustment routine. The
coefficients for the FillingCheck
TM
function are also adjusted during the
adjustment procedure.
11.3.4
Performing an Atmospheric Pressure Adjustment
You can adjust the built-in atmospheric pressure sensor.
1. Tap <Menu> and select
"Checks/Adjustments > Other Adjustments >
Density Module > Atmospheric Pressure Sensor Adjustment"
.
