Analog Trim Function - Oval ALTI mass CA00A Instructions Manual

L -- 740 -- 28 -- E

9.9 Analog Trim Function

The transmitter is provided with two analog outputs. Both are factory adjusted and requires no further
adjustment. However, if it is absolutely necessary to readjust, follow the instructions outlined below.
Prior to making adjustment, connect required measuring instruments in place for making output level
measurement of analog output. Covered below is the procedure to make 4mA trim of analog output 1
(trimming 4.1mA to 4mA in the example below). A similar procedure applies to other adjustments.
Click "SEL1".
Click "SEL3".
Click "ENT".
Click "ENT".
Click "SEL3".
Click "ENT".
Click "ENT".
Click "ENT".
Click "ENT".

NOTE:
(1) Bring up the item of function you want to use.
Firstly, proceed key operation to show Trim Analog 1 screen (4mA trim of analog output 1).
(For the procedure to view individual items, see 9.2.2 thru 9.2.7 Transition chart.)
When the cursor is placed over 4mA trim of analog output 1, click "SEL1" to bring up
4mA trim screen of analog output 1.
(2) Decide whether to perform analog trim or not.
To perform 4mA trim of analog output 1, click "SEL3" to proceed to the next
screen.
If you want to cancel the trim process, click "ENT" followed by clicking "SEL3" and
the window returns to menu select screen.
(3) Enter the present output value. (The transmitter produces 4mA output now.)
At present, the output of analog output 1 is fixed to 4mA.
Enter the current reading (4.1mA) of the instrument connected.
For the setup procedure, see 9.3 Parameter Value Setup (3).
(In the screen below, a value 4.1000 is finalized.)
(4) Conform the measurement value.
If the measurement value "4.1000" is definitely OK, click "SEL3".
4mA trim of analog output 1 is performed accordingly.
If you want to cancel the trim process, click "ENT" followed by clicking "SEL3" and
the window returns to menu select screen.
(5) Confirm the current reading of analog output1.
Analog output 1 produces the 4mA output that has just been trimmed.
Confirm the current value of the instrument connected.
If the instrument reads 4mA and requires no further trimming, click "SEL3".
But in the case the instrument reads a value different from 4mA, click "ENT"
followed by clicking "SEL3". You are now back to step (3) and ready to try again.
Click "SEL3".
Click "SEL3".
This function is disabled in Write Protect mode
(refer to section 9.2).
Click "SEL3".
Click "SEL3".