Fluid Components International MT91 Manual Operation User Manual
Page 9
CHAPTER 3 - OPERATION
FLUID COMPONENTS INTL
Doc. No. 003185 Rev. B
3 - 9
Model MT91 Multipoint Flowmeter
2.2.1 CHAN 1 HEADS
1 . . . 5 . . . . 0 . . . . 5 .
x x x x . . . . . . . . . . . . .
Enter Head #?
C00223-1
Figure 3-5 Assign Heads Displays
4.
Figure 3-5 shows the display when adding or deleting heads. The ‘x’ signifies a selected head. To add or delete
a head, enter the number of the head, then press ENTR. When finished, press ENTR again without an entry.
5.
Select 6=Save to ensure survival of the changes through resets and power cycles.
Setting Analog Outputs
The analog output channels are defined by four parameters: zero, minimum flow, maximum flow, and full scale.
Figure 3-6 shows how these parameters affect the output.
Figure 3-6. Analog Output
Full scale represents the flow or temperature value that corresponds with the maximum output signal.
Zero represents the flow or temperature value that corresponds with the minimum signal output. Minimum signal
output can be set to indicate a flow of zero. This is often referred to as a zero-based signal output. A minimum
signal that represents a value greater than zero is referred to as non-zero based.
Minimum and maximum flow are factory set parameters that do not appear as options in this menu level. Until the
minimum flow value is reached, the output will remain at the zero level. Once the minimum flow threshold is met or
exceeded, the output signal will jump to the value determined by the zero and full scale settings.
Output signal is physically selected with a jumper setting as described in Chapter 2. 0-5 Vdc, 0-10 Vdc and 4-20
mA are the available options.
Mode defines the channel as a flow or temperature output.
Ø To set analog outputs:
1.
Go to menu level 2.2.2 (Setup
Þ
Display
Þ
Analog). Select 1=Chan 1 or 2=Chan 2.
2.
Select 1=Output Signal. Then select from the following options: 1=0-5V, 2=0-10V, or 3=4-20mA.
3.
Select 2=Mode. Then select from the following options: 1=Flow or 2=Temp.
4.
Select 3=Full Scale. Enter a numeric value, then press ENTR to accept it.
5.
Select 4=Port Zero. Enter a numeric value, then press ENTR to accept it.
Note:
If a different output signal is selected other than the factory calibrated output, a re-calibration of the analog
output board will be necessary. See following procedure. Ensure that the corresponding jumper is placed
in the correct position. See Chapter 2 for jumper positions.