E-026-3-E
Fig. 3-69
3.7.3 Trim Analog (analog output adjustment)
This adjusts the output value of the flowmeter transmitter's analog output.
This function is for adjusting the values by outputting analog values equivalent to 4mA and 20mA
regardless of the processing state. If the flowmeter's output is used to control valves or other such
parts as safety protocol, change the control loop to manual control so that the control loop cannot be
influenced by the flowmeter's output.
NOTE: If the loop current mode is set to "Disabled", this test is unusable.
(1) Click "Diag/Service (T)" from the menu, and then click on "Trim Analog".
(2) The following window (Fig. 3-69) will be displayed. Select the scale from "4mA - 20mA" or "Other
scale" and click "OK".
(3) By clicking "OK" button, the message box (Fig. 3-70) will be displayed. To adjust the analog output,
click "OK" button.
Fig. 3-70
When "4mA - 20mA" is used for adjustment, insert a reference ammeter into the analog output loop,
and perform the adjustment following the method described in steps (4) to (7).
When "Other scale" is used, insert a load resistance into the analog output loop, and perform the
adjustment following the method described in steps (8) to (12) (this description covers the situation
where R
L
= 250
Ω
is inserted to make an adjustment on both ends of the voltage value scale of 1 to
5V).
