Omega RD-MV100 Series User Manual page 290

Appendix 2 Data Formats of ASCII Files
App-8
• Number of data sets and file size
The file size of 50 data sets
Size of the header section + 50 × size of the data section of one data set = 14019
bytes
* 50 data sets is the maximum number of mamual sampled data sets that can be written in the
internal memory. If there are more than 50 data sets, they are overwritten starting with the
oldest data set.
Note
• Plus (+)/minus (–) over range in measurement channels
Over range occurs when the input type is voltage and the input exceeds ±5% of the
measurable range. For example, consider the case when the measurement range is 2 V and
the measurable range is from –2.000 to 2.000 V. If the input signal exceeds 2.200 V, + over
range occurs. If the input signal falls below –2.200 V, – over range occurs.
Over range occurs when the input type is TC (thermocouple) or RTD (resistance temperature
detector) and the input exceeds approximately ±10°C of the measurable range. For example,
consider the case when the measurement range is R and the measurable range is from 0.0 to
1760.0°C. If the input signal exceeds approximately 1770.0°C, + over range occurs. If the
input signal falls below approximately –10.0°C, – over range occurs.
• Plus (+)/minus (–) computation overflow in computation channels
Plus (+) computation overflow occures when the value exceeds 3.4E + 38.
Minus (–) computation overflow occures when the value falls below –3.4E + 38.
• Output value when detected errorous data, measurement over range data, or computation
overflow data
Channels
Measurement channels
Computation channels
• CH/TAG and UNIT lines
In the following cases, both the CH/TAG line and the UNIT line are rewritten after a carriage
return line feed and followed by manual sampled data.
• When the measurement channel is switched from some setting other than [Skip] to [Skip].
• When the measurement channel is switched from [Skip] to some other setting.
• When the computation channels are turned On or turned Off.
• When the unit is changed.
Four lines from the bottom of the file example shows the output when the unit for channel 31
is changed from "mV" to "V."
*
for 30 measurement channels is calculated as follows.
Data
measurement error
plus (+) over range
minus (–) over range
computation error
plus (+) computation overflow
minus (–) computation overflow
Output Value
Blank
99999
–99999
999999999
999999999
–99999999