FEC920: USER GUIDE
Page 76
September 18
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.
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
= mA
Units
= %
Input Low
= 4.00
Input high
= 20.00
Shunt
= 250 Ohms
Lin Type
= Type J
Range Low
= 100.00
Range High
= 200.00
Range Units
= °C
Scale Low
= 0
Scale High
= 100
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.
Figure 70 Typical alarm 1 configuration menu
Type
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
Note:
Trending is restricted to the PV range (Span High - Span Low), but the instrument can display
values outside this range.
Abs High
Active Not ackd
35.00°C
5.00°C
Manual
Off
00:00:00
Type
Status
Threshold
Hysteresis
Latch
Block
Dwell
Channel.1.Alarm1
No
Yes
No
Yes
No
Acknowledge
Active
Inactive
N.acknowledged
Acknowledgement
Inhibit
A5E45696052A Rev-AA
