Hanna Instruments HI 9910 - Manual (Page 9)

9
FUNCTIONAL DIAGRAM HI 9911 FUNCTIONAL DIAGRAM HI 9911 FUNCTIONAL DIAGRAM HI 9911 FUNCTIONAL DIAGRAM HI 9911 FUNCTIONAL DIAGRAM HI 9911
DUAL SETPOINT, DUAL SETPOINT, DUAL SETPOINT, DUAL SETPOINT, DUAL SETPOINT, pH pH pH pH pH CONTROLLER CONTROLLER CONTROLLER CONTROLLER CONTROLLER
pH
0 SECONDS pH 2.0 0
TIMER MINUTES 90
0.5
45 1
1.5
COARSE FINE SLOPE OFFSET
ALKALINE SET
ACID SET
PROPORTIONAL SETTINGS
1 10
2.5
5
7.5
ACID
ALARM
ON
OFF
SET
READ
ACID
ALK
ACID
FEED
ALK
MTC
°C -10 80
10
0
30 20
60
70
40 50
1 10
2.5
5
7.5
ALK
HI 9911 pH
0
1
2
ALARM
MTC ATC
mA OUTPUT
TEMP. COMP.
4/20 0/20
SET ACID
ALARM
LINE
SET ALK
1
2
3
4
5
6
7
8
9
10
11
12
14
13
15
16
17
18
19
20
21
22
23
FRONT PANEL
Left panel
1. Liquid Crystal Display
2. Slope calibration trimmer
3. Fine setpoint trimmers for acid and alkaline feed
4. Coarse setpoint trimmers for acid and alkaline feed
5. Offset calibration trimmer
6. Dosing LED signals for acid and alkaline feed
7. READ for actual measurement and SET for setpoint
adjustment
8. Acid or Alkaline selection for setpoint
9. Alarm LED and switch to disable the alarm
10. Graded dial for Manual Temperature Compensation
11. Two independent overdosage timers
12. Proportional pH band and time cycle settings
Right panel
13. pH alarm setting from 0 to 2 pH
14. Short the terminals if a ground probe is not in use, or
connect the ground probe wire to the Matching Pin terminal
15. Three-wire Pt 100 plus a shield protection
16. Recorder output contacts
17. Automatic or Manual Temperature Compensation switch