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SPAN EXAMPLE
In an input range of 0 to 600 degrees C, the temperature range between 500 and 600 degrees is of most
interest. In such a case, Span Low is set to 500 and Span High to 600 so that the instrument trends only the
required part of the temperature range, effectively magnifying the area of interest.
Note: Trending is restricted to the PV range (Span High - Span Low), but the instrument can display
values outside this range.
CHANNEL CONFIGURATION EXAMPLE
A type J thermocouple is used to measure a temperature range of 100 to 200°C. This thermocouple output is
transmitted to the instrument by a 4 to 20mA transmitter, for display as a value between 0 and 100%.
In Channel.Main, set the following for the relevant channel:
Type
Units
Input Low
Input high
Shunt
Lin Type
Range Low
Range High
Range Units
Scale Low
Scale High
Other items may be left at their defaults.
6.4.3 Alarm 1 menu
Allows the alarm characteristics for Alarm 1 to be configured. The figure below shows a typical configuration
page (expanded for clarity). Actual configuration parameters are context sensitive.
Type
Page 76
= mA
= %
= 4.00
= 20.00
= 250 Ohms
= Type J
= 100.00
= 200.00
= °C
= 0
= 100
Acknowledge
N.acknowledged
Acknowledgement
Figure 70 Typical alarm 1 configuration menu
Select an alarm type from: 'Off', 'Abs. High' (absolute high). 'Abs. Low' (absolute low),
'Dev. High' (deviation high), 'Dev. Low' (deviation low), 'Dev. Band' (deviation band), 'Rise
FEC920: USER GUIDE
Channel.1.Alarm1
Type
Abs High
Status
Active Not ackd
Threshold
35.00°C
Hysteresis
5.00°C
Latch
Manual
Block
Off
Dwell
00:00:00
No
Active
Yes
Inactive
No
Yes
No
Inhibit
A5E45696052A Rev-AA
September 18
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