McCrometer ProComm - Flow Direction; 11.0 Performance; Sampling Rates; Power-Up

30125-48 Rev. 1.0 | 05AUG2021
Page 10
Performance
10.3 Flow Direction
Value Description
0 Flow Direction Positive
1 Flow Direction Negative
11.0 Performance
11.1 Sampling Rates
Typical sampling rates are shown in the following table.
Variable Sampling Rate
Primary Flow Rate Sensor Sample 20 per second
PV Digital Value Calculation 20 per second
SV Digital Value Calculation 20 per second
TV Digital Value Calculation 20 per second
QV Digital Value Calculation 20 per second
Analog Output Update 20 per second
11.2 Power-Up
On Power-Up, the device performs a full Self-Test procedure, which takes about 2 seconds. During this time, the analog
output is set to 4.0mA and the HART communication is oine. When the self-test was perfomed, the measurement begins
and data is available for HART communication. Fixed-current mode is reset by power loss.
11.3 Reset
Command-42 performs a Device Reset. The procedure is executed immediately after the device has answered to the master
as feedback. After the reset, the device follows the Power-Up procedure (see Section 12.2).
11.4 Self-Test
Command-41 performs a Self-Test.
This procedure immediately updates the error ags read through Command-48. Error ags are also refreshed at each cycle
of the main program.
To perform a complete test of the device, you must reset the device. In this case, the self-test procedure veries the following
parts:
• Microcontroller
• RAM
• Program ROM
• Memory Conguration
• ADC
• DAC
The full Self-Test takes about 5 seconds. During this time, the analog output is set to 4.0mA and the HART communication
is oine.