Yokogawa Standalone MW100 - Manual (Page 30)

1-16
IM MW100-01E
Range Over
When the MW100 detects a range over (see below) on a measurement or MATH
channel, “+Over” or “–Over” is displayed.
• Measurement channel range over
• During DC voltage input, strain input, and resistance (20 Ω, 200 Ω, etc.), a range
over is detected if the value that is measured on a measurement channel is outside
of the measurable range by more than ±5%. For example, when the measurement
range is 2 V, the measurable range is –2.0000 to 2.0000 V. If the voltage exceeds
2.2000 V or goes below –2.2000 V, a range over is detected.
• During high-resolution DC voltage input and pulse input, a value less than 0% of
the measurable range is a negative range over, and a value greater than 105% of
the measurable range is a positive range over.
• If the input type is thermocouple or RTD, excluding the cases where the
thermocouple or RTD has a special range, a range over is detected when the
temperature goes more than approximately 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. The
special ranges mentioned here are ranges such as KpvsAu7Fe or J263. If you
are using a special range, “–Over” will be displayed if the temperature goes below
approximately 0°C.
• On channels that use linear scaling, the range-over values, after removing the
decimal point, are above 32000 and below –32000. However, even if the measured
value is within ±30000, if it is a range-over value according to the previous range, it
will be handled as a range-over value.
• When you are performing differential computation between channels, if the
measured value is outside of the measurable range, a range over will be detected.
When you are using a sensor such as a thermocouple, the measurable range
when performing differential computation between channels may be larger than the
measurable range when not performing differential computation between channels.
• MATH channel range over
See “Math Span” on page 1-67 in section 1.15, “MATH Function (/M1 Option).”
1.3 Functions of the Main Module