Yokogawa Button Operated MV2000 - Manual (Page 23)

1-14
IM MV1000-01E
Dgtal Dsplay
Displays measured data using large numeric symbols.
For operating instructions, see section 5.2.
Unit
Tag name or channel number
Alarm mark
Measured value
Note
• Measurement Channel Numerc Value Dsplay
When the MV detects a range-out (see below), the display is either “+Over” or “-Over.”
When the MV detects a burnout on a channel that has been set to be checked for burnouts,
the display is “Burnout”. All other values are displayed numerically.
Range-outs are detected on measurement channels in the following circumstances.
• If the DC voltage input value goes above the measurable range ± 5%, a range-out is
detected. For example, when the measurement range is 2 V, the measurable range is
–2.000 to 2.000 V. If the voltage exceeds 2.200 V, a positive range-out is detected. If it
goes below –2.200 V, a negative range-out is detected.
• If the input type is thermocouple or RTD, a range-out is detected when the temperature
goes 10°C above or below the measurable range. For example, when the measurement
range is set to R, the measurable range is 0.0 to 1760.0°C. If the temperature exceeds
1770.0°C, “+Over” will be displayed. If the temperature goes below -10.0°C, “-Over” will
be displayed.
• On channels that use linear scaling, the range-out values, ignoring the decimal point,
are above 30000 and below –30000. However, you can also set the range-out values to
105% or greater, and –5% or less of the scale width, as long as those values fall within
±30000.
For configuration instructions, see section 3.11.
• Computaton Channel Numerc Value Dsplay
See section 1.9.
• External Input Channel Numerc Value Dsplay (/MC1 opton)
The range of displayable values, ignoring the decimal point, is –30000 to 30000. The
decimal place is determined by the location of the decimal point on the external input
channel’s minimum span value. Regardless of maximum and minimum span value settings,
all values within the range of –30000 to 30000 will be displayed. If the value exceeds 30000,
“+Over” will be displayed. If the value goes below –30000, “-Over” will be displayed.
• Alarm Dsplay
The alarm mark and measured values are displayed in the following ways depending
on the alarm condition.
Alarm
Release
AlarmACK AlarmACK
Occurrence
Indication not held Indication held
Red Blue Red Blue Red Red Blue Blue Blue Blue Blue
Measured
value
Blinking
red
Blinking
green
Blinking
red
Green Red Red Green Green Green Green Green Alarm mark
1.4 Dsplay