4. Calibration and Check
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DA-650/-645/-640
4. Calibration and Check
Density/Specific Gravity Meters require calibration and/or check for accurate
measurement. Density value in relation to oscillation frequency is corrected by
calibration. A change of oscillation frequency is verified by check. Calibration
prior to everyday work is recommended. The past record of oscillation
frequency of air and water at time of calibration can be reviewed.
4-1. Calibration
The sensitivity of the equipment can be calibrated with air and water.
Calibration with air and water is necessary whenever a change occurs on
the equipment such as installation place, cell temperature, etc.
Calibration is simple and easy. Just follow Calibration Navigator.
1
Select Calibration.
z
Press “Calibration”.
z
Press “Next”.
You will see a message: “Dry
meas cell.”
When <Check/Calibration>
Press “Check”.
Press “Calibration Navigator”.
2
Clean measuring cell
(Rinse 2)
z
Make sure the sample/drain lever is
turned to “Drain.”
z
Wipe off tip of sampling tube with
waste cloth.
z
Put the tube in rinse 2 (ethanol,
acetone, etc.).
z
Press “PUMP” to suck rinse 2 and clean
the cell. (for about 10 sec)
z
Press “PUMP” to stop pump operation.
Hint
For quick cell cleaning: when rinsing the cell, suck air and
water alternately by detaching sampling tube from water at
intervals.
Summary of Contents for DA-640
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