Measurement
37
Q
Contact output
Control targets and their available options
Make the setting referring to the table shown below. Displayed options vary depending on the
settings shown in gray. Items with a check mark are available for selection.
Table 3 Control targets and their available options
Contact output types
The following contact output types are available.
z
non: No output
This setting disables the contact output.
z
CtrL: Control output
If the measured value is lower than the value of (control value + control width x 1/2), the
control contact is output (ON) and chemical is injected by the metering pump.
If the measured value is higher than the value of (control value - control width x 1/2), the
output is stopped (OFF) and chemical injection is stopped by stopping the pump.
(The above explanation is applicable to the lower limit operation. The opposite operation
applies to the higher limit operation.)
The settings include:
z
HorL (Control direction setting):
Hi: The action occurs when the value exceeds the value of (control value + control width
x 1/2).
Lo: The action occurs when the value fall below the value of (control value - control
width x 1/2).
z
SEt: (Control value setting): 0.00 to 3.00 (mg/L)
z
diff: (Control width setting): 0.02 to 1.00 (mg/L)
R1
R2
R3
Description
Selected type
Control direction setting
(r1, r2, r3)
non
CtrL
AL, t HoLd, CAL
Control direction setting
−
3
3
−
Control value setting
−
3
3
−
Control width setting
−
3
−
−
Contact output delay time
setting
−
−
3
3
Measured
value
Contact
output
(r1 to r3)
Control width
Control value
3.00
0.00
CtrL: Example of control output (when the control direction is set to "Hi" [opposite operation applies to "Lo"])
