22
need to set zero point to improve the accuracy for small flow measurement. At the time, you
need to cut zero point on site.
Cut zero steps:
M22 menu-Cut-
1. Yes, it displays “success” if zero point is cut. and the flowmeter would
return to M01 menu.
Reset zero steps:
M22 menu--Reset-1. Yes
6.1.4 Flow Meter K Factor
Meter factor indicates the specific value of actual flow and the display value of the flowmeter.
For example, the actual flow at the measurement point is 3 and the flowmeter displays 2.99,
then the meter factor is 3/2.99. Under perfect measurement status, the optimum meter
factor is "1". However, it’s hard to make all flowmeters have the same factor in batch
production and also because of the changeable environment on site, it’s impossible to ensure
the meter factor of all flowmeters is "1".
Therefore, each flowmeter would be calibrated before leaving factory to get its meter factor,
which is called K Factor.
You also could calibrate the flowmeter in service on site through M26 menu.
6.1.5 System Protection
System protection is mainly to avoid abnormal operation of flowmeter in installation or
operation because of touching by mistake. When system protection is enabled, you could
view the flowmeter but can’t correct any parameters.
You could enable or disable this function in M54 menu. You need to enter passcode to
activate the function or make alterations.
6.1.6 Current Loop Output
The current loop output accuracy is 0.1%. It is programmable and you can set several output
modes like 4~20mA and 0~20mA in M23 menu.
In M32 menu, 4mA/20mA is the minimum/maximum limit value. For example, the flow range
in a pipe is 0~1000m3/h, you only need to input 0 and 1,000 respectively in M32 menu. If the
flow range is -1,000 ~ 0 ~ 2,000m3/h, and 20 ~ 4 ~ 20mA output is used while not considering
