23
Example of Using OCV of 0 to 2.000 for setting Analog Output
4 mA output is desired for Power Factor of -0.4 (OCV = 0.400).
20 mA output is desired for Power Factor of +0.4 (OCV = 2.000 - 0.4 = 1.600).
Set up as follows: deC.Pt to 111.111, AnSEt to 21, An_Lo to +0.400 (4 mA point), An_Hi
to +1.600 (20 mA point), dEC.Pt as desired to 111.111, 1111.11 or 11111.1
Example of Using OCV of 0 to 2.000 for setting the Alarm Setpoints
It is desired to operate Relay1 when the Power Factor falls outside of ±0.75 display range
(or outside of 0.750 to 1.250 OCV range).
Set up as follows: ConFig to x1xx to take meter out of Power Factor, dEC.Pt to 111.111,
SEtPt1 to 1.000, AL_SEt to 00000, dEUtn1 to 0.250 to activate Relay1 above 1.250 and
below 0.750, dEC.Pt as desired to 111.111, 1111.11 or 11111.1 . Return meter to Power
Factor mode by setting ConFig to x2xx
DUTY CYCLE MEASUREMENT TO 0.01% RESOLUTION
Application:
Measure “on” period of perio-
dic pulses as a % of total period with .01%
resolution over a time interval of 100 sec.
Solution:
Duty cycle requires the Extended
counter. Apply the same signal to
Channels A & B. Set Input to “Duty Cycle
(A to B) / A.” The native counts will be in
percent. For a positive “on” pulse, set
trigger slope to positive for A and negative
for B. Select the coordinates of 2 points
scaling method. Set Hi In1 to 1.00000
(percent) and Hi Rd1 to 1.00 (percent). As
an alternative, select the scale and offset
scaling method. Then simply select a scale
value of 1.00000 and a multiplier of 100.
1/RATE MODE FOR TIMING
(Extended Counter)
An example of 1/Rate is the time it takes an item takes to travel through an oven at a
measured rate. Like Rate, 1/Rate can be scaled using Scale1 and Offset1. With no offset
and Scale1 set to 1, Rate A for the full analog input range will be displayed as 0-100000,
and 1/A will be displayed as 1000000/A. Both the A and 1/A readings are multiplied by
Scale1 and offset by Offset1. With Scale1 set to 1, A is displayed as 10000, and 1/A is
displayed as 100. With Scale1 set to 2, A is displayed as 20000, and 1/A is displayed as
200. If square root extraction is applied to rate, the rate display A is replaced by
√
Ā, and
1/A is replaced by 1/
√
Ā. 1/A does not apply to custom curves.
Scaling may also be done by using the coordinates of 2 points method, which auto-
matically calculates scale and offset for the displayed value when the low and high input
signals and the corresponding desired low and high displayed values are entered.
Summary of Contents for 800 plus
Page 63: ...63 SERIAL CONNECTION EXAMPLES ...
