MU300 Rev1.0 Oct20
Page 28 of 54
6.1.10 4-20mA Output Calibration
Note:
Each flowmeter is strictly calibrated before leaving factory. If you are not sure it is
calibrated or not, please try not to use this function. If you are sure that the display
value is not identical with the actual output current, you could carry out 4-20mA
output calibration. Please use M32 menu to check it out first.
Before calibrating the analog input, DO operate the hardware debugging menu as
follows:
a)
Please input the passcode to enter Menu 62 to carry out 4-20mA calibration
function.
b)
Use [ ][ ] key to switch and calibrate current loop 4mA output. Use the ammeter
to measure the output current of the current loop and adjust the digits displayed at the
same time. Observe the ammeter till the reading is 4.00.
c)
Use the same method to calibrate 20mA output.
The calibration data would be automatically saved in EEPROM would not lose when the
power is cut.
6.1.11 SD Card Operation Instructions
Note: SD card is optional. Please make sure your flowmeter has such function or not.
Specifications and parameters
Data acquisition frequency could be set from 1 to 99999 sec/time as required.
Data acquired: Time/date, transient flow, flow rate, total flow, POS Total and NEG
Total.
Data storage format:
a = 2017-11-16,16:21:12
b = + 2.00 m3/h
c = +9.380460E-02 m/s
d = + 3.02 m3
e = +3.5 02 m3
f = +0.00 m3
g = +0.00 GJ/h
h = +0.00 GJ
i = +0.0 00 GJ
j = + 0.00'C
k = +0.00'Cfile