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P118i Ultrasonic Flowmeter and Analyzer
Reversion: 3.0.0 Page 22 of 49
Calibrating and testing the current loop is performed in Window M58. Complete the steps as follows
：
Press , move or to display "4mA" "20mA", connect an ammeter to test
the current loop output and calculate the difference and check whether the difference is within tolerance or not.
Refer to Section 4.6 for Current Loop Verification.
Check the present current loop output in Window M59, the value will change along with the change of the flow.
4.6 4-20mA Analog Output Calibration
Attention
Each flowmeter has been strictly calibrated before leaving factory. It is unnecessary to
carry out this step except when the current value (detected while calibrating the current loop)
displayed in Window M58 is not identical with the actual output current value.
Calibrate the analog input required to expand the hardware debugging Menu as below procedures:
Press to enter the password "115800" then press . This action will be
inoperative after powering off.
Then press to enter the Current Loop Verification Mode, press to enter the 4mA verification
status, use an accurate ammeter to measure the output current of the current loop, and move or to
adjust the displayed values, wait for the ammeter current value to reach "4.00mA", then the 4mA verification is
finished.
Press to do the 20mA verification using the same procedure as for the 4mA verification.
The verification results will be automatically saved in the EEPROM and will not be affected when the instrument
is powered off.
4.7 TF Card Operation
4.7.1 Specifications
Memory: 2 GB ((To prevail in kind)).
Note: The SD card is a consumable item and its models updates quickly. Thus the configuration is on the basis of
the physical matter received.
Data collection interval: any interval settings from 1 to 60 seconds are OK according to the requirement.If the rate
is set longer than 60 seconds the default will be 60 seconds; when it is set to be less than 1 second, it will default
to 1 second.
Data content: date and time, flow rate, flow velocity, total flow, positive totalizer and negative totalizer.
Data collection time: user selectable from 1~9999 mins. If it is set longer than 9999 mins, it will default to 9999
mins.
Data storage format: 1=07-04-10,14:16:33
2=+3.01 m
3
/h
3=+1.00 m/s
4=-00 m
3
5=+00 m
3
6=-00 m
3
File system format: FAT32
File type: plain text file(.TXT)