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FIGURE 3 (Sampling Examples)

Sample

Pump

Low Pressure

Sample Water

Source

Flush Valve

to Drain

Pressure entering
RAH-210 must be

reduced to 5 psig

(0.3 bar) or less

Sample Water

Flow Meter

Y-Strainer

Pressure Reducing

Valve Assembly

Pressure Reducing

Valve Assembly

Grab
Sample
Valve

To Drain

Pressurized
Sample Water
Source

It should also be considered that the sample point should be located such that the residual

reading can be used as a control signal for the chemical injection. Especially, it should be
considered that if there is a long time delay between chemical injection changes and the
change being detected by the measurement cell, then chemical injection control is adversely
aﬀ ected. The delay time should be kept as short as possible. We recommend that the time
be less than 5 minutes.

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Содержание 210 Series

Страница 1: ...e Analyzer Instruction Manual RAH 210 Rev 5 12 2021 The information contained in this manual was current at the time of printing The most current versions of all Hydro Instruments manuals can be found on our website www hydroinstruments com 1 ...

Страница 2: ...ching Between Modes 3 Operating the Keypad VI Explanation of Operation Mode Screens 14 VII Explanation of Conﬁguration Mode Screens 16 VIII Explanation of PID Control Mode Screens 23 IX Maintenance Cleaning 25 1 Inlet Filter Screen and Weir 2 Flushing Measurement Cell 3 Reagent Valve Star Wheel 4 Cell Assembly 5 Motor Striker Assembly 6 Thermistor 7 pH Probe X Troubleshooting 28 XI Optional Data L...

Страница 3: ...ntrol program can be enabled as proportional ﬂow pacing set point residual or PID compound loop control 2 Galvanic Cell Theory Pure water has a relatively low conductivity However the presence of ionizing species increases the conductivity If two electrodes are immersed in a solution containing chemical species ions capable of being reduced gaining electrons then this species can move toward the c...

Страница 4: ...ermine the concentration of Free Chlorine by one of two methods Consider Figure 1 in the discussion of both methods First an acidic buﬀer solution can be injected into the water sample stream to reduce the pH below 5 so that all of the Free Chlorine is in the form of Hypochlorous Acid Second pH and Temperature measurements can be used to continuously determine the degree of Hypochlorous Acid disso...

Страница 5: ... inhibitors may eﬀect analyzer operation Range 0 to 0 1 to 0 to 20 mg l PPM Field adjustable Power Consumption 10 W max Power Requirements 120VAC 50 60 Hz or 240VAC 50 60 Hz single phase Accuracy 0 003 mg l or 1 of range whichever is larger Sensitivity 0 001 mg l 1 ppb Input Signals 5 Analog 4 20 mA Output Signals 4 Isolated 4 20 mA Analog Res pH Temp Turbidity or Control Digital Communication Mod...

Страница 6: ...a location with constant water Temperature then this compensation is not necessary However if the sample water Temperature experiences signiﬁcant ﬂuctuations then the raw signal will be aﬀected and software Temperature compensation is necessary for accurate readings For use in pH compensation As described in Section I if the pH buﬀer is not being used to lower the sample water pH then pH compensat...

Страница 7: ...s generally not recommended to use a ﬁlter in this piping system because as the ﬁlter collects particles it will develop a chlorine demand and therefore the chlorine residual in the sample water will be reduced by the ﬁlter leading to inaccurate readings However in certain installations with signiﬁcant amounts of solids in the sample water particularly iron and manganese the use of sample water ﬁl...

Страница 8: ...ized Sample Water Source It should also be considered that the sample point should be located such that the residual reading can be used as a control signal for the chemical injection Especially it should be considered that if there is a long time delay between chemical injection changes and the change being detected by the measurement cell then chemical injection control is adversely aﬀected The ...

Страница 9: ...TRUE BLUE 40 80 100 140 180 200 40 80 100 140 180 200 40 80 100 140 180 200 40 80 100 140 180 200 Min 10 x Dia pipe Ideal 20 x Dia pipe Residual Signal 4 20mA Water Flow Signal 4 20mA NET 1 1234 NET 2 5678 Residual Chlorine Analyzer RAH 210 Wall Panel Omni Valve Vacuum Regulator Ejector Sample Water PRV RAH PRV Corporation Stop Vent 9 ...

Страница 10: ...is recommended Sodium acetate trihydrate and glacial acetic acid can be mixed with distilled deionized water as follows a Add 850 mL of distilled deionized water to a 1 2 gallon 2L bottle b Add 486 grams sodium acetate trihydrate crystals and mix until all the crystals are dissolved c Add 952 grams or 907 mL of glacial acetic acid to the bottle d Fill the bottle to the top with distilled deionized...

Страница 11: ...at the glycine crystals are dissolved completely 2 Conditioning the Analyzer Before calibration is carried out the analyzer must be operated for at least 24 hours to allow the readings to stabilize If the reagent feed system is being used then the following procedure must be followed also a Holding the full reagent bottle upright pull the tapered plug upward until the hole in the cap is plugged Tu...

Страница 12: ...tedly b Configuration and Calibration Mode This mode is accessed from the Operation Mode by pressing the button until the password screen is reached Then enter the password 210 and then press the button c PID Control Mode When enabled this program will display several general status and control screens in the Operation Mode To access the screens which allow this program to be set up press the butt...

Страница 13: ... PPM Alarm Status None Enter Password 220 AUTO MANL increments of 1 0 01 increments MANL RES 1 24 PPM PO1 0 0KG H Set PO1 Valve 0 0KG H Alarm Status None Enter Password 220 MANL AUTO increments of 1 0 1 increments Set Point Res ORP 2 00 PPM 0 01 increments Residual ORP AUTO Residual ORP MANL Enter Password 220 AUTO RES 1 24 PPM PO1 0 0KG H AUTO FLO 24 9 PO1 0 0KG H Set Point Res ORP 2 00 PPM Set D...

Страница 14: ...appears when the PID Control program is enabled and the Control Mode is selected as either Proportional or Compound Loop Control This is an adjustable factor that is multiplied to the incoming ﬂow signal Set Point RES ORP This menu appears when the PID Control program is enabled and the Control Mode is selected as either Residual or Compound Loop Control This is an adjustable factor that represent...

Страница 15: ... Cal 0 00 NTU Turb 2 Span Cal 50 00 NTU 000 0 00 00 0 000 00000 Residual Temperature pH Turbidity Data Logger On Setup Res1 Temp pH Turbid Aout Alarm DL Setup Res1 Temp pH Turbid Aout Alarm DL Setup Res1 Temp pH Turbid Aout Alarm DL Select AO1 Resl Resl Temp pH Turb 1 Turb 2 PO1 Select AO2 Resl Select AO3 Resl Select AO4 Resl Alarm Mode Non latching Non latching Latching Alarm Delay Time 10 secs S...

Страница 16: ... may need to be performed in the ﬁeld for best accuracy To access this calibration menu follow the steps noted on Figure 7 To pass by this screen press the button twice or press the button when the word Skip is blinking To perform a residual zero cal press the button to make the word Begin blink Then press the button Residual Zero Cal Enter residual value of zero sample water When the residual val...

Страница 17: ...on 4 10 pH calibration and the sample pH calibration The calibration type to use is completely up to the user However Hydro Instruments recommends using the following setting A If pH buﬀers are not available then use the sample calibration This is only a one point calibration your sample and will automatically calculate an ideal calibration slope This provides reasonable accuracy if the sample pH ...

Страница 18: ...f the calibration point is accepted an accepted screen will appear Press down to clear the screen and the next buﬀer solution required will appear 5 Place the pH electrode in the appropriate buﬀer solution and select Begin 6 The software will wait for a stable reading over 25 seconds If the second calibration point is accepted an accepted screen will appear Press down to clear and the pH calibrati...

Страница 19: ...tings for the four alarm relays Relay 1 Relay 2 Relay 3 Relay 4 Alarm Mode Select Latching or Non Latching A latching relay will require manual acknowledgement of any alarm condition by pressing the button on the Main Operation Mode screen When Non Latching is selected alarms will clear themselves whenever the alarm condition no longer exists Alarm Delay Enter desired delay time Any alarm conditio...

Страница 20: ...20 ...

Страница 21: ...M Flow Units GPM GPM MGD LPM MLD GPD M3 H Flow Decimal Posn 000 0 000 0 00 00 0 000 00000 Flow Full Scale 5 0 GPM Flow Threshold 0 0 GPM Control Type Flow Pacing OFF Flow Pacing Residual ORP Compound Loop Control Mode Residual Flow Process Output PO1 Resl Integral Value 20 0 Resl Max Lag Time 1800 secs Lag Time Method Fixed Lag Time Fixed Lag Time Variable Lag Time Flow Low Alarm 1 0 GPM 0 Off Flo...

Страница 22: ... Turbid Aout Alarm DL pH Low Alarm 6 00 pH High Alarm 9 00 pH Compensation Mode AUTO AUTO MANUAL MONITOR NONE S 6HWXS S DOLEUDWLRQ XIIHUV Enter Sample Cal 8 20 Begin Sample Cal 66mV Skip Begin Sample Water Cal Wait 25 pH Calibration Type Sample Sample 4 0 and 7 0 4 0 and 10 0 7 0 and 10 0 S DOLEUDWLRQ 6DPSOH S GHDO 6LJQDO P9 P9 FFHSWDEOH 5DQJH DOLEUDWLRQ P9 P9 P9 P9 P9 S DOLEUDWLRQ 6LJQDO XIIHUV R...

Страница 23: ...nual adjustments Residual Integral Value A factor used in the calculation of needed adjustments to the process output This value ranges from 0 100 Essentially the program makes a calculation of how much the output needs to be adjusted in order to reach Set Point and this factor Increasing the Integral will increase the rate of each individual adjustment and vice versa Residual Lag Time This is the...

Страница 24: ...o Then press the button A conﬁrmation screen should appear indicating that the calibration was performed Begin Flow Span Cal To pass by this screen press the button twice or press the button when the word Skip is blinking To perform a ﬂow span cal press the button to make the word Begin blink Then press the button Flow Span Cal Input a steady 20 000 mA signal to AI1 Adjust the displayed Flow value...

Страница 25: ... then the reagent valve needs to be cleaned as follows a Turn oﬀ the power to the analyzer b Stop the sample water ﬂow c Raise the reagent bottle about 2 and then pull down the valve stem in the cap to plug the hole before removing the bottle d Hold reagent bottle upright and remove the cap Place the bottle near the tubing connector to the adapter Remove the tubing connector nut remove the tubing ...

Страница 26: ...is process or refer to section VI 6 Reconnect the wires to the cell assembly side and bottom Start the sample water ﬂow and once water can be seen ﬂowing out of the drain turn on the power to the analyzer 5 Motor Striker Assembly In order to replace the motor or striker assembly the measurement cell assembly should be removed from the panel and controller and taken to a table to perform the operat...

Страница 27: ...stance reading around 10 kohms then the thermistor is not defective If the reading is zero or inﬁnite the thermistor is defective and must be replaced d After replacement thermistor recalibration may be required e If the thermistor fails the analyzer temperature mode can be set to Manual to allow for proper operation until a replacement thermistor is installed 7 pH Probe The pH probe will periodic...

Страница 28: ...ons do not reﬂect on the operating screen this means one of two things a the cell signal to the electronic circuit board is at or very close to zero millivolts or b the analyzer was previously calibrated with a signal at or very close to zero millivolts 2 Once this occurs the analyzer software must be reset by performing a factory default This is accomplished by turning the power oﬀ and then press...

Страница 29: ...ith a residual value of at least 25 of the ordered range Ideally the span calibration should be performed with a residual value of 50 or more of the ordered range If the normal measurement range is less than 25 of the ordered range contact Hydro Instruments or an authorized distributor for guidance on resetting the range of the analyzer Temperature Temperature reading is not correct 1 Independentl...

Страница 30: ...g in the cell or inside the motor 2 Follow steps 2 and 4 from the previous section on Motor Jammed to identify the source of the noise 3 If necessary replace the motor IMPORTANT NOTE Do not attempt to disassemble the motor It is encapsulated and is not intended to be repaired in the field Motor is hot to the touch The motor will always operate hot to the touch The speciﬁc temperature of the motor ...

Страница 31: ...A outputs will be frozen Correct the sample water ﬂow issue Once the Sample Flow Stop alarm has been cleared the 4 20mA outputs will indicate live readings If the optional sample ﬂow switch is not installed than the setting for the Sample Flow Stop alarm may be wrongfully enabled Communication Errors The MB220 Display board is communicating with the other boards by Modbus over the ribbon cable If ...

Страница 32: ... line header for each ﬁle The fourth and ﬁfth lines are headers for the data You will see that each header and data entry is delimited by a comma b File Name Each data ﬁle will be named according to the date on which it was created For example if created on May 24 2016 the ﬁle name would be May24_16 txt i If the Micro SDHC memory card already has a ﬁle started earlier on the same day then data wil...

Страница 33: ... into the Excel spreadsheet TABLE 3 Hydro Instruments RAH 210 Residual Data Log File V5 1 Date Time Resl Temp pH Turb1 Turb2 Flow MF Raw Resl MM DD YEAR HH MM SS PPM C NTU NTU mV 05 24 2016 11 25 06 0 80 23 7 80 0 50 1 00 0 1 80 22 05 24 2016 11 26 06 0 81 23 7 80 0 55 1 02 0 1 80 22 05 24 2016 11 27 06 0 80 23 7 81 0 53 1 03 0 1 81 22 05 24 2016 11 28 06 0 81 23 7 81 0 54 1 03 0 1 81 22 05 24 201...

Страница 34: ...2 24 22 15 16 C 17 15 19 14 16 A A 16 B B 16 C C 32 2 28 8 9 14 25 26 21 20 29 18 17 13 17 TO MOTOR 12 5 8 RED BLACK FRONT TOP Date August 2017 EXPLODED VIEW Dwg No RAH 210 B CELL EXP RESIDUAL CHLORINE ANALYZER MEASUREMENT CELL 34 ...

Страница 35: ... 1 4 Stainless Steel Bolt RHMS 2 BTH RA 127 15 10 24 x 1 Stainless Steel Bolt PHMS 8 BTH RA 126 16A Starwheel Assembly 1 RAH 709 16B Starwheel Body Used with reagent feed pump 1 RAH 709 1 16C Adapter 1 RAH 470 17 PM O Ring 3 OH BUN 128 18 Bottom Body 1 RAH 441 19 Gold Probe Assembly 1 RAH 226 AU 20 1 4 NPT 3 8 Tube Tubing Connector 1 BKF 64 21 1 4 NPT 1 4 Tube Tubing Connector PVDF Kynar 1 10 4 4 ...

Страница 36: ...8 25 16 6 7 10 11 14 15 20 17 2 26 8 9 17 23 24 21 27 18 13 19 TO MOTOR 12 5 8 RED BLACK 30 22 14 FRONT TOP Date 2017 10 06 v1 EXPLODED VIEW Dwg No RAH 210 CELL EXP RESIDUAL CHLORINE ANALYZER MEASUREMENT CELL 36 ...

Страница 37: ...8 12 Flush Plug 1 RAH 472 13 1 4 20 x 13 4 Stainless Steel Bolt RHMS 2 BTH RA 124 14 PM Gasket 2 GAH BUN 130 15 PM Cleaning Balls 1 RAH 471 16 PM Copper Cell 1 RAH 263 17 6 32 x 1 4 Stainless Steel Bolt RHMS 2 BTH RA 127 18 Bottom Body 1 RAH 442 19 PM O Ring 1 OH BUN 128 20 Gold Probe Assembly 1 RAH 226 AU 21 1 4 NPT 1 4 Tube Tubing Connector PVDF Kynar 1 10 4 4 KO 22 1 4 NPT Plug 1 PLH 108 250 23...

Страница 38: ...art No Description Quantity No 1 pH Probe Cable 1 PHE 14 S7 2 pH Electrode 1 PHE 14 135 3 pH Probe Gland 1 PHV GLAND 4 pH Fixure 1 AFC CHP 025 5 1 4 x 11 2 PVC Nipple 1 880 015 6 1 4 Ball Valve 1 22321 7 Tubing Connector 2 BKF 64 8 1 4 PVC Plug 1 850 002 9 1 4 20 x 21 4 SS PHMS 2 BTH RA 129 10 Tubing Guide 1 RAH 460 38 ...

Страница 39: ...Item Part No Description Quantity No 1 Reagent Bottle 1 RAH 1300 2 1 4 20 x 1 Stainless Steel Screw RHMS 2 BTH RA 290 3 O Ring for Feeder Body 1 3PS 332 NH3 4 Feeder Body 1 RAH 459 5 1 4 NPT 3 8 Tube Tubing Connector 1 BKF 64 6 Tubing Guide 2 RAH 460 1 4 20 x 5 8 Stainless Steel Bolt PHMS NOT SHOWN 2 BTH RA 270 39 ...

Страница 40: ...sembly with Pump Tube Hose Barbs and Screws 1 RAH 101 951 3 Neoprene Pump Tube with Hose Barbs 1 RAH TS NOR 4 1 4 LDPE Tubing 1 P 114 5 1 4 NPT 1 4 Tube Tubing Connector PVDF Kynar 1 10 4 4 KO NOTES 1 Item 4 P 114 1 4 LDPE Tubing is ordered per foot The tubing can be cut to the required length 2 At least 18 46 cm of the P 114 1 4 LDPE Tubing is needed from the pump head to the measurement cell 40 ...

Страница 41: ...Input 2 Digital Input 1 C14 V V MB181 BOARD node 6 optional Optional Flow Switch use DI1 and V Thermistor green AIC blue RS1 pH Probe green AIC black AI3 Jumper if no pH probe PID Flow Input Analog Input use AI1 and V MB128 TEMP pH FLOW BOARD node 2 MB114 FOUR OUTPUT BOARD node 3 Analog Output 4 use AO4 and V Analog Output 3 use AO3 and V Analog Output 2 use AO2 and V Analog Output 1 use AO1 and V...

Страница 42: ... DW 7HUPLQDO ORFN 1RGH 0 RXU 5HOD RDUG 1RGH 0 RDUG 5LEERQ DEOH IURP 0 DEOH WR S 3UREH 3RZHU QOHW 3RZHU 6XSSO RDUG 9 3RZHU 2XWSXW 0 5HDO 7LPH ORFN 0 LVSOD RDUG 5LEERQ DEOH IURP 0HPEUDQH 6ZLWFK 0RGEXV 7HUPLQDOV 9 9 0LFUR 6 DUG 6ORW Date 2020 06 29 v1 Dwg No RAH WC 1 MONITOR INTERNAL WIRING AND CONNECTIONS FIGURE 11 Monitor Internal Wiring and Connections 42 ...

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