Measurement
39
Contact output types
The following contact output types are available.
non: No output.
This setting disables the contact output.
CtrL: Control output.
When the measured value is higher than the point [control value + control width
1/2], the
control output turns off to stop injection.
When the measured value is lower than the point [control value - control width
1/2], the
control output turns on for driving a pump to inject chemical solution.
The control direction must be “Lo” for the operation above.
The settings include:
HorL: Specifies a control direction.
Hi: Turns ON the output when the measured value exceeds
[control value + control width
1/2].
Lo: Turns ON the output when the measured value becomes lower than
[control value
control width
1/2].
SEt: Specifies a control value: 0.00 mg/L to 3.00 mg/L
diFF: Specifies a control width: 0.02 mg/L to 1.00 mg/L
AL: Alarm output
When the measured value is higher than the control point, the alarm contact will be output
subsequently to the on-delay time. When the measured value becomes lower than the
setting, the output immediately turns OFF, canceling the alarm (the above explanation is
applicable to the upper limit operation. For the lower limit operation, the process is
reversed).
The settings include:
HorL: Specifies a control direction.
Hi: Contact turns on when the value is above the upper limit.
Lo: Contact turns on when the value is below the lower limit.
SEt: Specifies a control value: 0.00 mg/L to 3.00 mg/L
dt: Specifies delay time: 0 seconds to 600 seconds
Measured
value
Control width
Control value
Contact output
(r1 to r2)
3.00
CtrL: Example of “Hi” control
0.00
diFF
1/2 diFF
SEt
ON
OFF
ON
h19136 | UTC 2020/03/30 3:34:51
CONFIDENTIAL
