FEC920: USER GUIDE
Page 75
September 18
Input sensor break detection is not supported for secondary inputs. The internal circuit
acts as a ‘pull up’ on the secondary input which therefore saturates high in the event of a
sensor break.
Fault Response
Specifies the behavior of the instrument if a sensor break is detected or if the input is over
driven (saturated high or low).
‘None’ means that the input drifts, with the wiring acting as an aerial.
‘Drive High’ means that the trace moves to (Scale High +10%). ‘Drive Low’ means that the
trace moves to (Scale Low -10%), where the 10% values represent 10% of (Scale High -
Scale Low).
Sensor Break Val
A diagnostic representation of how close the sensor break detection circuitry is to tripping.
Measured Value
The (read-only) input channel measured value before any scaling or linearization is
applied.
Measured Value2
As ‘Measured Value’, above but for the secondary input.
Internal CJ temp
The (read-only) temperature of the internal cold junction associated with this channel.
6.4.2 Channel Trend configuration
This area allows the configuration of channel color and span.
Figure 69 Channel Trend menu and Color selection
Colour
Allows a color to be specified for the channel. The Scroll key is used to enter the color
swatch page. The up and down arrows are used to scroll through the available colors, with
each color being enlarged for as long as it is ‘selected’. Once the required color, is
reached, the scroll key is used again to return to the Trend Configuration.
Span Low/High
Span low and high values.
Note:
Break High impedance values would be used typically for sensors which have a high nominal
impedance when working normally.
Note:
Trend colors and alarm settings for secondary inputs are configured in the maths channels to
which they are wired.
Wheatgerm
0.00
200.00
Colour
Span Low
Span High
Channel.1.Trend
Channel.1.Colour
Wheatgerm
A5E45696052A Rev-AA
