The document defines various terms related to flow measurement including: Damping is the reduction of vibratory movement through dissipation of energy and can occur through viscous, coulomb, or solid means. Decibel (dB) is a unit used to express the ratio of two voltages or power levels where every 20 dBs corresponds to a voltage ratio of 10. Digital output is an output signal that represents the size of an input using a series of discrete quantities.

1. www.micronicsflowmeters.com
Glossary
...D

2. www.micronicsflowmeters.com
Damping:
The reduction of vibratory movement through dissipation of
energy. Types include viscous, coulomb, and solid.
dB (Decible):
20 times the log to the base 10 of the ratio of two voltages.
Every 20 dBs correspond to a voltage ratio of 10, every 10
dBs to a voltage ratio of 3.162. For instance, a CMR of 120
dB provides voltage noise rejection of 1,000,000/1. An NMR
of 70 dB provides voltage noise rejection of 3,162/1.

3. www.micronicsflowmeters.com
DC:
Direct current; an electric current flowing in one direction
only and substantially constant in value.
Dead Volume:
The volume of the pressure port of a transducer at room
temperature and ambient barometric pressure.
Default:
The value(s) or option(s) that are assumed during operation
when not specified.

4. www.micronicsflowmeters.com
Degree:
An incremental value in the temperature scale, i.e., there
are 100 degrees between the ice point and the boiling point
of water in the Celsius scale and 180°F between the same
two points in the Fahrenheit scale.
Density:
Mass per unit of volume of a substance. I.E.: grams/cu.cm.
or pounds/cu.ft.

5. www.micronicsflowmeters.com
Deviation:
The difference between the value of the controlled variable
and the value at which it is being controlled.
Differential:
For an on/off controller, it refers to the temperature
difference between the temperature at which the controller
turns heat off and the temperature at which the heat is
turned back on. It is expressed in degrees.

6. www.micronicsflowmeters.com
Digital Output:
An output signal which represents the size of an input in the
form of a series of discrete quantities.
Digital-to-Analog convertor:
A device or circuit to convert a digital value to an analog
signal level.

7. www.micronicsflowmeters.com
DIN
(Deutsche Industrial Norm):
A set of German standards recognized throughout the
world. The 1/8 DIN standard for panel meters specifies an
outer bezel dimension of 96 x 48 mm and a panel cutout of
92 x 45 mm.

8. www.micronicsflowmeters.com
Doppler Technology:
An acoustic pulse is reflected back to the sensor from
particles or gases in the flowing liquid. The flow rate of any
fluid can be measured as long as it contains air bubbles or
solids. It is ideal for wastewater, slurries, sludge and most
chemicals, acids, caustics and lubrication fluids.

9. www.micronicsflowmeters.com
Duplex:
Pertaining to simultaneous two-way independent data
communication transmission in both direction. Same as
"full duplex".
Drift:
A change of a reading or a set point value over long periods
due to several factors including change in ambient
temperature, time, and line voltage.

10. www.micronicsflowmeters.com
Thank you for reading...
If you have found this interesting or informative be sure
to view other sections of our Glossary available on our
website or in further presentations.
For other information or enquiries contact us:
Telephone: 01628 810456
Email: sales@micronicsltd.co.uk