9.7
SETTING OF THE RELAY REGULATION MODE
Go to the menu RELAY REGULATION
• There is no access to settings of relay regulation mode if relays S1 and/ or S2 are operating; So, go to::
ON / OFF MODE
To access to this mode, first go back to menus ADJUST ALARM S1 and S2 to set them in OFF
mode.
• There is no access to relay regulation mode when PID regulation is operating; So go to:
PID MODE
To access to relay regulation mode, go to to the menu REGUL. PID to switch it OFF.
• Regulation mode is thus accessible if, and only if, the THRESHOLD and PID modes are deactivated.
REGULATION ON / OFF
Select ON mode to set up parameters, then confirm.
SET VAL 07.00 pH
Enter the threshold value, then confirm.
T. CYCLE 0060 Sec
Enter the cycle time according to the process, then confirm.
HIGH PB 00.80 pH
Enter the differential for upper bandwidth, then confirm.
Note: Output S2 is dedicated for upper bandwidth.
LOW PB 00.50 pH
Enter the differential for lower bandwidth, then confirm.
Note: Output S1 is dedicated to lower bandwidth.
HIGH DZ 00.50 pH
Enter the differential value for the upper dead zone, then confirm.
LOW DZ 00.20 pH
Enter the differential value for the lower dead zone, then confirm.
SAVE ?
To record the settings, press the icon SAVE.
Cycle time
High limit
Set point
Low limit
Time
S1 actuated
No action
Dead zone
Measurement
S2
EXAMPLE:
For settings such as following:
- Set point: pH 7.00
- Cycle time: 10 s
- Upper bandwidth: 3 pH (i.e. high limit is pH 10.00)
- Lower bandwidth: 1 pH (i.e. lower limit is pH 6.00)
- High dead zone: 0.3 pH (from pH 7.00 to 7.30)
- Lower dead zone: 0.7 pH (from pH 6.30 to 7.00)
Results for operating regulation:
- Above the High limit, between pH 10 and 14, output S2 is continuously activated (continuous injection of base, pH will decrease).
- Below the Low limit, between pH 0 and 6, output S1 is continuously activated (continuous injection of acid, pH will increase).
- Within the Dead zones, between pH 6.3 and 7.3, the outputs S1 and S2 are not actuated.
- When measurement is above Dead zone and below High limit (pH 7.3 to 10), or below Dead zone and above the Low limit (pH 6 to 6.3), the
outputs S1 or S2, are actuated during a time proportional to the difference between set point and measurement.
Actuation time = Cycle time x (Measurement - Set point) / High or Low bandwidth
Caution:
According to the above example, if measurement is pH 7.80, actuation time = 3 s: 2.66 = 10 x (7.8 - 7) / 3
MES
23-11-2018
M-107.01-EN-AE
107-01
/13
pH/ mV monitors
BAMOPHAR 107
22, Rue de la Voie des Bans · Z.I. de la gare · 95100 ARGENTEUIL
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+33 (0)1 30 25 83 20
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