72 Micro Motion Series 1000 and Series 2000 Transmitters
Optional Configuration
Temperature data
For the temperature value to be used in CTL calculation, you can use the temperature data from the
sensor, or you can poll an external temperature device:
• To use temperature data from the sensor, no action is required.
• To poll an external temperature device, configure polling for temperature as described in
Section 9.4. When polling is enabled, the transmitter will automatically use the external
temperature value for CTL calculation.
8.7 Configuring cutoffs
Cutoffs are user-defined values below which the transmitter reports a value of zero
for the specified process variable. Cutoffs can be set for mass flow, volume flow, or
density.
Note: The density cutoff is available only with core processor software v2.0 or
above and transmitter software rev3.0 or above.
See Table 8-4 for cutoff default values and related information. See Sections 8.7.1 and 8.7.2 for
information on how the cutoffs interact with other transmitter measurements.
Reference temperature Supports
6C Method 2 60 °F, non-configurable 60 °F Degrees API
24C Method 2 60 °F, non-configurable 60 °F Relative density
54C Method 2 15 °C, configurable 15 °C Base density in kg/m
3
Table 8-4 Cutoff default values
Cutoff type Default Comments
Mass flow 0.0 g/s Recommended setting:
• Standard use: 0.5–1.0% of the sensor’s rated maximum flow rate
• Empty-full-empty batching: 2.5% of the sensor’s rated maximum flow rate
Volume flow 0.0 L/s Lower limit: 0
Upper limit: the sensor’s flow calibration factor, in units of L/s, multiplied by 0.2
Gas standard volume
flow
0.0 No limit
Density 0.2 g/cm
3
Range: 0.0–0.5 g/cm
3
Table 8-3 API reference temperature tables continued
Table
CTL
derivation
method Base temperature
Density unit and range
Degrees API Base density Relative density
• Model 1500 AN
• Model 1700 AN
• Model 1700 IS
• Model 2500 CIO
• Model 2700 AN
• Model 2700 IS
• Model 2700 CIO
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