Tyco 1540 - Manual (Page 37)

3.15.2 Analogue Output Scaling Example
In this example, the Integra has an output current range of 0 to 10mA and it is required that this
output range represents a reading range of 95 to 135V.
3.15.2.1 Reading (A1r or A2r)
The measured electrical parameter that the analogue output will represent.
Example: Volts Ave (Average Voltage)
As shown in Table 2, any continuously variable parameter (volts, amps, watts etc) can be
selected for output as an analogue value. The table also shows those values that may be signed
(where the value may go negative).
3.15.2.2 Reading Top (A1rt or A2rt)
This is the value of the electrical parameter that will cause the analogue output to produce
‘Output Top’.
Example: 135 volts.
3.15.2.3 Reading Bottom (A1rb or A2rb)
This is the value of the electrical parameter that will cause the analogue output to produce
‘Output Bottom’.
Example: 95 volts.
This value may be set to any value between zero and 120% of nominal. (Or between –120% and
+120% of values that may be signed for example VAr)
3.15.2.4 Output
The two Output values specify the analogue current outputs that will represent the top and
bottom Reading values. They are included to allow additional versatility where particular
requirements prevail or to convert a 0-20mA output to 4-20mA. However it is suggested that, in
most other cases, these values should be set to the limits that the hardware can cover. The
range of the analogue output(s) for the unit is marked on the product label.
3.15.2.5 Output Top (A1ot or A2ot)
This is the value of output that will be reached when the measured electrical parameter is at the
reading top value.
Example: 10mA.
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Integra 1540, 1000, 0640, 0440, 0340, 0240 Issue 1 04/03
Example
Output top 10mA 135V Reading top
Output bottom 0mA 95V Reading bottom
Analogue Output
current from unit
Reading Value
represented by Output