Hanna Instruments HI520 - Page 172

Annex 172
Figure 37: PID Control Block .................................................................................................... page 94
Figure 38: Proportional Action by Means of Proportional Band .................................................... page 94
Figure 39: Controller Structure Representation ........................................................................... page 95
Figure 40: Proportional Function with pH Probe Connected ......................................................... page 96
Figure 41: Derivative Function with pH Probe Connected............................................................. page 96
Figure 42: Tunning PID Parameters, Dosing an Alkaline Solution to a Weak Acid .......................... page 98
Figure 43: PID Control Mode Low, Relay & Analog Out ............................................................... page 98
Figure 44: PID Control Mode Low, Relay Out with Minimum On Time ........................................... page 99
Figure 45: PID Control Mode Low, Relay Out with 0 % Dead Band Gain ....................................... page 99
Figure 46: PID Control Mode Low, Relay Out with 50 % Dead Band Gain ..................................... page 99
Figure 47: Cleaning Control & Sequencer Block........................................................................ page 101
Figure 48: Cleaning Algorithm, Simple Cleaning ...................................................................... page 103
Figure 49: Cleaning Algorithm, Advanced Cleaning .................................................................. page 103
Figure 50: Cleaning Trigger, External Input ............................................................................. page 104
Figure 51: Cleaning Trigger, Internal Timer ............................................................................. page 104
Figure 52: Cleaning Trigger, Internal Schedule ........................................................................ page 104
Figure 53: Cleaning Trigger, Operator Intervention ................................................................... page 104
Figure 54: Cleaning Trigger, External Input & Internal Timer ..................................................... page 105
Figure 55: End Cleaning, Stop Sequences ............................................................................... page 105
Figure 56: End Cleaning, Suspend Condition ........................................................................... page 106
Figure 57: End Cleaning, Stop Condition ................................................................................. page 106
Figure 58: HI1006‑18zz industrial pH probe with attached cable ............................................. page 114
Figure 59: HI1006‑1800 industrial pH probe with DIN connector ............................................. page 114
Figure 60: HI1026‑1803 pH probe for specific meat applications ............................................. page 115
Figure 61: HI1126‑1805 pH probe for general food applications .............................................. page 115
Figure 62: HI2004‑18zz industrial ORP with attached cable .................................................... page 115
Figure 63: HI2004‑1800 industrial ORP with DIN connector .................................................... page 115
Figure 64: HI7630‑28zz two‑electrode EC probe with attached cable ....................................... page 126
Figure 65: HI7630‑2800 two‑electrode EC probe with DIN connector ........................................ page 126
Figure 66: HI7630‑48zz four‑ring EC probe with attached cable .............................................. page 126
Figure 67: HI7630‑4800 four‑ring EC probe with DIN connector ............................................... page 127
Figure 68: HI7640‑18zz galvanic DO probe with attached cable ............................................... page 139
Figure 69: HI7640‑1800 galvanic DO probe with DIN connector ............................................... page 139
Figure 70: Smart cap detail (HI7640‑58 industrial optical DO) ................................................. page 148
Figure 71: HI7640‑58ZZ optical DO with attached cable .......................................................... page 149
Figure 72: HI7640‑5800 optical DO with DIN connector .......................................................... page 149
Figure 73: HI520 Configuration ............................................................................................. page 161