AW Gear Meters EMO-1005 - Manual (Page 19)

AW-Lake Company 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com
 Tel: 262-884-9800  Fax: 262-884-9810  Email: [email protected]
REV. 1a 05/98 EMO-1005 Manual.DOC
18
OFFSET ANALOG OUT (Display 5)
OFFSET ANALOG OUT
CURRENT=XXXXXXXX
This display takes care of the Analog Offset adjustment. The full voltage span goes from 0 to 5V
(0-20mA). Some applications however require a base voltage of 1 Volt (4mA). This base voltage can
be programmed in the Offset Voltage. The EMO-1005 unit uses a 10 bit D/A converter for the Analog
Output, where 0 Volt relates to a count of 0000 and 5 Volt is 1023. The offset is a number between
000 and 255 (0V to approximately 1.24V). This offset should be adjusted in the field. The offset has a
connection with the gain Factor. In order to achieve the maximum span the following formula is
applied:
AV * ( 205 + ((205-Offset) / 4)))
Analog Out = AV -
256
where,
Analog Out is the offset voltage at zero frequency input
AV is the maximum Voltage (usually 5V)
The default value is 00000205 (4mA)
**** 1Volt =
205 steps * 4.8828mV/step
**** 4 mA = 205 steps * 19.5 μA/step
After having the right number press the ENT key
SAMPLE AMOUNT (Display 6)
SAMPLE AMOUNT
CURRENT=XXXXXXXX
The sample amount can be entered in this display. This sample amount is a digital filter used to make
the display rate steadier. The amount can be a number between 2 and 50. By increasing the number of
samples used to produce an output into the display, the display response slows and the numbers are
steadier and easier to read. The default value is 00000008. After having the right number press the
ENT key.
WARNING:
SHOULD THIS VALUE BE CHANGED TO ZERO, THIS DISPLAY WILL READ ZERO