AW Gear Meters RT-Ex15-Ex - Manual (Page 16)

AW-Lake Company 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com
 Tel: 262-884-9800  Fax: 262-884-9810  Email: [email protected]
RT-Ex15-Ex manual rev 6.13.11.docx Revision 3.3.10
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To program press and hold the ENT button or maintain the ENT magnetic switch. The display
will first show a P in the lower left-hand corner and will then display the first program variable
for this mode. Three parameters will be accessed in order as follows:
MA OFFSET
ANALOG POINT
ENTER VALUE AT MAX MAs
MA OFFSET – This variable is used to set to lowest value for the mA output span and as a fine
offset adjustment in the field if necessary. The low range of the output span is programmable
between 4.00 and 10.00 mA. The RT-Ex15 will not accept a value less than 4 mA. The RT-Ex15
utilizes the output device AD421 manufactured by Analog Devices. The minimum output is
trimmed to 4.00mA by the device manufacturer. Consult the manufacturer’s data sheet for
AD421 for complete specifications regarding offset tolerance.
When entering or editing the value, the digit being edited will blink starting with left-most digit.
Select the digit to edit using the SEL button or magnetic switch. Use the UP or DN button or
magnetic switch to increment or decrement the variable value. When the desired value is
displayed, use the ENT button or magnetic switch to store the programmed value and advance to
the next variable.
ANALOG POINT – This variable is used to “point” to an output assignment for the analog
output. The output can be assigned to represent one of 3 possible functions as follows:
RATE A GT (#00) RATE A PL (#01) TOTAL A (#02)
A number corresponding to the output assignment is displayed to indicate the current function of
the analog output. The default assignment for the ANALOG POINT is RATE A
GT (#00). RATE
or TOTAL assignments will produce an output ranging from the MA OFFSET value (4-10 mA)
for a zero value, to 20 mA for the maximum programmed flow rate or total.
Use the SEL button or magnetic switch to select the output assignment. Use the ENT button or
magnetic switch to store the desired output assignment.
ENTER VALUE AT MAX MA’S – This scaling variable is used to set the maximum mA
output (20mA.) to a corresponding rate value producing an output ranging from the MA
OFFSET value (4-10 mA) for a zero value, to 20 mA for the maximum programmed flow rate.
The entry will correspond with the KFR, decimal location and engineering units for RATE A
GT .
The initial value is a rate of 10 HZ.
When entering or editing the value, the digit being edited will blink starting with left-most digit.
Select the digit to edit using the SEL button or magnetic switch. Use the UP or DN button or
magnetic switch to increment or decrement the variable value. When the desired value is
displayed, use the ENT button or magnetic switch to store the programmed value and advance to
the next variable.