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AMALGAMATED INSTRUMENT PM4-CO, Инструкция по эксплуатации

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6.7

Temperature Calibration

The temperature calibration is a single point calibration. Place the temperature sensor in an
accurately known temperature environment and allow to stabilise. Enter the calibration (

CAL

)

mode and step through the functions by pressing the

F

button until the display shows

CAL "C

.

Press the

^

and

v

simultaneously the display will show

CAL"C

followed by the live temperature

reading. Press the

F

button, the display will now show

"C

. Now press the

^

or

v

button to set

the correct temperature value then press the

F

button, the display will read

CAL1End

indicating

that the calibration is complete. If any other message is seen refer to section

6.13

.

6.8

Conductivity/Resistivity/ppm Uncalibration

This function sets the instrument calibration back to the factory calibrated value. Uncalibrate is
useful as a temporary measure when the probe is replaced and on the spot recalibration is difficult
or when a calibrating error exists due to incorrect calibration. To enter the uncalibrate mode follow
the procedure described above and step through the functions by pressing the

F

button until the

display shows

UCAL cond

or

UCAL RESt

or

UCAL ppm

. Press the

^

and

v

pushbuttons

simultaneously the display will show

UCAL End

indicating that the calibration is cleared. If any

other message is seen refer to section

6.13

.

6.9

Temperature Uncalibration

This function sets the instrument calibration back to that of an ideal temperature sensor. Uncal-
ibrate is useful as a temporary measure when the probe is replaced and on the spot recalibration
is difficult or when a calibrating error exists due to incorrect calibration. To enter the uncalibrate
mode follow the procedure described above and step through the functions by pressing the

F

but-

ton until the display shows

UCAL"C

. Press the

^

and

v

pushbuttons simultaneously the display

will show

UCAL End

indicating that the calibration is cleared. If any other message is seen refer

to section

6.13

.

6.10

Equivalent resistance values

Equivalent resistance values The following table shows equivalent resistances for various conduc-
tivity levels and cell constants. If errors are encountered in the display value or if difficulties are
encountered in calibration then an appropriate value resistor can be used in place of the cell to
perform basic checks on the instrument operation. The value of resistance can be calculated from:

Conductivity/cm

= (

1

resistivity

)

×

Kf actor

Some examples are shown in the table below.

PM4COMAN-2.2-1

43 of

48

Содержание PM4-CO

Страница 1: ...t Display Controller Operation and Instruction Manual AMALGAMATED INSTRUMENT CO PTY LTD ACN 001 589 439 Unit 5 28 Leighton Place Hornsby Telephone 61 2 9476 2244 e mail sales aicpl com au NSW 2077 Australia Facsimile 61 2 9476 2902 Internet www aicpl com au ...

Страница 2: ...ction 3 2 Mechanical Installation 7 3 Electrical installation 8 4 Function tables summary of setup functions 14 5 Explanation of functions 18 6 Calibration 40 7 Specifications 47 8 Guarantee and service 48 2 of 48 PM4COMAN 2 2 1 ...

Страница 3: ...model A standard inbuilt relay provides an alarm control function additional relays retransmission and DC output voltage may also be provided A special blowdown relay operation is available for units fitted with 2 relays Unless otherwise specified at the time of order your PM4 has been factory set to a standard configuration Like all other PM4 series instruments the configuration and calibration a...

Страница 4: ...ed for viewing then the instrument simply measures con ductivity using a conventional conductivity cell and converts this reading into the required display units For ppm readings the conversion factor must be manually entered Cell K factor The instrument can only supply a given current range through the solution being measured therefore a cell designed for use with pure water will not be suitable ...

Страница 5: ...c pipework Ideally the cell should be in stalled from the side of the fitting This method is less likely to be subjected to trapped air The T fitting should be modified to allow the face of the cell to be flush with the inside of the fitting or pipe wall It is acceptable for the cell to be slightly recessed when the cell is installed from the side of the fitting Alternatively a 3 4 BSP hole may be...

Страница 6: ...the flow entering the cell at the base opening and exit ing from the holes around the perimeter This method will provide a fast response Alterna tively the cell may be installed across the flow not suitable for TBLR type cells or K 10 0 TBTH cells This will provide a stable and ac curate measurement but the response time will be slower In most applications this will not present a problem These cel...

Страница 7: ...ption for panel mount instruments Prepare a panel cut out of 45mm x 92mm 1 mm 0 mm see diagram below Insert the instrument into the cut out from the front of the panel From the rear of the instrument fit the two mounting brackets into the recess provided see diagram below Whilst holding the bracket in place tighten the securing screws being careful not to over tighten as this may damage the instru...

Страница 8: ...confirm proper selection of voltage polarity and input type before applying power to the instrument When power is applied the instrument will cycle through a display sequence indicating the software version and other status information this indicates that the instrument is functioning Acknowl edgement of correct operation may be obtained by applying an appropriate input to the instrument and obser...

Страница 9: ...e cell the centre core wire should be connected to Terminal 10 Ensure that the PRbECNSt function has been correctly set for probe type AIC cells with temperature compensation sensors are all wired with Red Black Blue and Yellow or White on older models inner core cable See the note below for details of TBPS cells without temperature compensation sensors The wiring connections are as below Cell wir...

Страница 10: ...igured check before connecting 1 2 3 4 5 6 7 8 9 10 11 Case earth Neutral Active DC power connections 12 to 48VDC supply type is factory configured check before connecting Relay connections Conductivity and temperature wiring 10 of 48 PM4COMAN 2 2 1 ...

Страница 11: ...Temperature sensor in most cases the temperature sensor is housed in the conductivity cell PM4COMAN 2 2 1 11 of 48 ...

Страница 12: ...pping screws from the back cover then remove the back cover by pulling it away from the instrument 3 Remove the earth screw which passes through the underside of the case then slide out the board or boards 4 Configure the PCB links as requred see appropriate chapter 5 Slide PCB back into case 6 Replace the earth screw which passes through the case 7 Refit the back cover and fix with the self tappi...

Страница 13: ...3 4 Input range link selection Dismantle the instrument as described in section 3 3 Insert the links into the appropriate location on the pin header to suit the range required PM4COMAN 2 2 1 13 of 48 ...

Страница 14: ...ime delay for the designated alarm relay x 0 to 9999 0 See 4 1 5 5 22 Axn o or Axn c Alarm relay x action to normally open de energised or normally closed energised Axn o or Axn c Axn o See 4 1 5 6 22 AxSP or Axt1 etc Relay operation independent setpoint or trailing setpoint Optional AxSP or Axt1 etc AxSP See 4 1 5 7 23 brGt Display brightness level 1 to 15 15 5 8 23 REC_ Analog output option low ...

Страница 15: ...27 dCPt Decimal point 0 0 1 etc 0 5 22 27 FLtr Digital filter 0 to 8 2 5 23 28 dOSE PERd Special dosing mode operation 0 to 600 0 5 24 28 C tYPE Temperature sensor type NONE 100 1000 L335 t100 or 25J1 NONE 5 25 28 dEF C Default temperature value 0 0 to 200 0 25 0 5 26 29 SOL SLPE Solution temperature compensation slope 6 00 to 0 00 2 00 5 27 29 SOL C Solution temperature compensation reference 0 0...

Страница 16: ... conversion factor 0 200 to 2 000 0 560 5 43 33 SEt dISP Set display type cond RESt PPm or Pcnt cond 5 44 33 rec ctrI Analog output PI control Optional on or OFF OFF 5 45 33 Pbut P button function for instruments with front P button NONE Hi Lo HiLo tARE ZERO P SEt NONE 5 46 34 ACCS Access mode OFF EASY NONE or ALL OFF 5 47 34 SPAC Setpoint access mode Optional A1 A1 2 etc A1 5 48 34 A1 A2 etc Alar...

Страница 17: ... 001 5 56 38 bAUd RAtE Baud rate for serial communications Optional 300 600 1200 2400 4800 9600 19 2 or 38 4 9600 5 57 38 PrtY Parity for serial communications Optional NONE EUEN or odd NONE 5 58 38 O Put Output for serial communications Optional dISP Cont POLL A buS or M buS Cont 5 59 39 Addr Instrument address for serial communications Optional 0 to 31 0 5 60 39 Optional this function will only ...

Страница 18: ...Remove power from the instrument Hold in the button and reapply power The display will briefly indicate as part of the wake up messages when the message is seen you can release the button Move to step 2 below 2 When the wake up messages have finished and the display has settled down to its normal reading press then release the button Move to step 3 below 1 When the wake up messages have finished a...

Страница 19: ...ve on to the next setpoint Note this easy access also functions in the same manner for the PI control setpoint relay and or analog PI output if PI control is available The instrument must be set in the manner described below to allow the easy access facility to work 1 The R INP function must be set to SPAC or the ACCS function must be set to EASY 2 At least one alarm must have a setpoint nothing w...

Страница 20: ...then relay 1 will activate when the display value is 10 or less Display Value Time A Lo x A HY x value A Lo A HY x x plus Relay activates at this value or below Relay resets above this value Alarm low operation with hysteresis 5 2 Alarm relay high setpoint Display AxHi Range Any display value or OFF Default Value OFF Displays and sets the high setpoint value for the designated alarm relay x Note x...

Страница 21: ...or high alarm and will reset when the display value falls below the setpoint this can result in repeated on off switching of the relay at around the setpoint value The hysteresis setting operates as follows In the high alarm mode once the alarm is activated the input must fall below the setpoint value minus the hysteresis value to reset the alarm e g if A1Hi is to 50 0 and A1Hy is set to 3 0 then ...

Страница 22: ... setpoint values With the alarm condition is removed the alarm relay will stay in its alarm condition for the time selected as the reset time If the input moves back into alarm condition during this period the timer will reset and the full time delay will be restored The reset time is selectable over 0 to 9999 seconds To set a reset time value go to the Axrt function and use the or v push buttons ...

Страница 23: ...r Example With Alarm 2 set to trail alarm 1 if A1Hi is set to 1000 and A2Hi is set to 50 then Alarm 1 will activate at 1000 and alarm 2 will activate at 1050 i e 1000 50 If Alarm 2 had been set at 50 then alarm 2 would activate at 950 i e 1000 50 5 8 Display brightness Display brGt Range 1 to 15 Default Value 15 Displays and sets the digital display brightness The display brightness is selectable ...

Страница 24: ... value Default Value 0 See REC_ function 5 9 for description of operation 5 12 Second analog output option high value Display REC Ch2 Range Any display value Default Value 1000 See REC function 5 10 for description of operation 5 13 Bargraph low value Display bAr_ Range Any display value Default Value 0 Seen only in bargraph display instruments Displays and sets the bar graph low value i e the val...

Страница 25: ... e g bAr_ 0 and bAr 100 will give a bargraph with the bottom segment lit at a 7 segment display reading of 0 and the top segment lit with a 7 segment display reading of 100 Note this could also be set up as a centre zero single dot display by entering a negative value and positive value e g bAr_ 100 bAr 100 d dot double dot display Two segments will be lit to indicate the input reading position on...

Страница 26: ... supplied when this option is fitted Selections available are bin2 signed binary i e 32767 to 32767 bin unsigned binary i e 0 to 65535 b SCL scaled binary see diG_ and diG below bcd binary coded decimal i e up to four BCD numbers 5 17 Digital output option polarity Display dG OP Range AIo or AHi Default Value AIo Seen only with the 16 bit digital output option Refer to the separate PM4 Panel Meter...

Страница 27: ...isplay of 2 will cause a retransmission of 2 If diG is now changed to 32767 215 1 then a display of 2 will cause a retransmission of 4 note rounding may occur on retransmission 5 21 Display rounding Display drnd Range 1 to 5000 Default Value 1 Displays and sets the display rounding value This value may be set to 1 5000 displayed units Display rounding is useful for reducing the instrument resoluti...

Страница 28: ...slowed down when the filter setting is increased To set the digital filter value go to the FLtr function and use the or v push buttons to set the required value then press F to accept this selection 5 24 Special blowdown dosing mode operation Display dOSE PERd Range 0 to 600 Default Value 0 Special dosing operation mode sets relay 1 operation period for special blowdown dosing pump operation mode ...

Страница 29: ...with temperature A typical value is 2 per o C for water Enter the solution value if known if the solution slope is not known then it can be obtained as follows 1 Set the slope setting to 0 00 2 Place the cell into a sample of the process solution Measure the temperature of the solution or alter the temperature to a desired level this temperature is shown as T1 in the formula below Allow the readin...

Страница 30: ...rogen ions as well as temperature When set to H ON the instrument compensates for conductivity due to the H and OH solvent ions which become prevalent at low conductivity These ions have an effect on water conductivity resistivity since they have different temperature compensation curves to water When set to H ON the a dry cell will give a display reading of 0 05uS cm if 2 decimal point places are...

Страница 31: ...e sensor output to be referenced to the instruments null value using short circuit input See section 6 6 for details 5 36 Temperature calibration Display CAL C Range n a Default Value n a This function is used to calibrate the temperature sensor See section 6 7 for details 5 37 Conductivity measuring units Display cond unit Range uS cm uS m mS cm or mS m Default Value uS cm Selects the conductivit...

Страница 32: ...function is set to RESt This function should only be used when calibration problems exist and it is necessary to clear the calibration memory See section 6 8 for details 5 40 ppm uncalibration Display UCAL ppm Range n a Default Value n a This function is used to set the ppm calibration back to the factory calibration values and will be seen only if the SEt dISP function is set to ppm This function...

Страница 33: ...n the display units selected or resistivity RESt in MΩ or parts per million ppm or Sodium Chloride NaCl percentage by weight Pcnt Select the default display required for measurement 5 45 Analog output PI control Display rec ctrI Range on or OFF Default Value OFF Analog output mode seen only when analog output option is fitted This function allows selection of on or OFF for PI control analog output...

Страница 34: ...and ALL If set to OFF the mode function has no effect on alarm relay operation If set to EASY the easy alarm access mode will be activated Refer to Easy alarm relay adjustment access facility page 19 If set to NONE there will be no access to any functions via FUNC mode entry via CAL mode must be made to gain access to alarm and calibration functions If set to ALL then access to all functions inclu...

Страница 35: ...osing pump output occurs immediately after the high level conductivity alarm resets This software operates in the following manner Two relays are fitted relay 1 is a timed dosing operation relay relay 2 is used as a high conductivity alarm which is used to operate the blowdown valve When the conductivity level becomes equal to or higher than the alarm 2 setpoint set at the A2Hi function relay 2 wi...

Страница 36: ...REC functions to suit the output mode selected Note if set for conductivity resistivity or ppm then the output will go to full scale if the display goes to overrange or displayed on the 7 segment display If set for temperature an overrange display will cause the output to revert to that for the default temperature set at the dEF C function i e if required the default temperature can be set to a va...

Страница 37: ...ample 5 54 Analog output logarithmic start point Display RECLo Range 0 001 0 01 0 1 1 0 or 10 0 Default Value 0 001 Analog retransmission logarithmic output low starting point Seen only when the analog retrans mission option is fitted and not applicable unless RECctrL is set to OFF Sets the low starting point 4mA or 0V output for the first decade of the logarithmic output Choices available are 0 0...

Страница 38: ... start point Display REC2Lo Range 0 001 0 01 0 1 1 0 or 10 0 Default Value 0 001 Second analog retransmission logarithmic output low starting point Seen only when the dual analog retransmission option is fitted and not applicable unless REC ctrL is set to OFF See RECLo for a description 5 57 Baud rate for optional serial communications Display bAUd RAtE Range 300 600 1200 2400 4800 9600 19 2 or 38...

Страница 39: ...s requested A buS is a special communications mode used with Windows compatible optional PC download software Refer to the user manual supplied with this optional software M bus Modbus RTU protocol 5 60 Instrument address for optional serial communications Display Addr Range 0 to 31 Default Value 0 Set unit address for polled POLL mode 0 to 31 seen only with serial output option Refer to the separ...

Страница 40: ...ferenced to the meter The instrument should be nulled before calibration To null the instrument the following procedure should be followed 1 If a temperature compensation sensor is used check that the temperature reading is correct and calibrate the temperature reading if necessary see Temperature Calibration Null and Temperature Calibration sections in this chapter Also check that the SOLSLPE fun...

Страница 41: ... the FUNC End message is seen or press P to escape to normal measurement mode 6 Clean the probe in pure water then insert into a second solution of known conductiv ity resistivity ppm the second solution must be at least 500uS cm higher or 10x lower for resistivity or 500 ppm higher in value from the first solution see note below if it is not possible to have a 500uS cm difference or 10x differenc...

Страница 42: ...e instrument should be set to display conductivity rather than resistivity using the SEt dISP function The calibration should then take place as a conductivity calibration and when calibrated the display set back to read resistivity This procedure is necessary since the resitivity null calibration value is too close to high resitivity solution values The conversion formula is Resistivity 1 Conduct...

Страница 43: ...ESt or UCAL ppm Press the and v pushbuttons simultaneously the display will show UCALEnd indicating that the calibration is cleared If any other message is seen refer to section 6 13 6 9 Temperature Uncalibration This function sets the instrument calibration back to that of an ideal temperature sensor Uncal ibrate is useful as a temporary measure when the probe is replaced and on the spot recalibr...

Страница 44: ...ions are given below The suggested factors are based on conductivities of approx 14 000 uS cm at 25o C For example the default setting for the instrument is 0 560 which is a figure used for NaCl sodium chloride solution or salt water Standard solution Use Suggested PPMFACt value NaCl Salt water and dairy products 0 560 442 General fresh water e g 40 sodium sulphate rivers lakes and reverse 0 860 4...

Страница 45: ... message indicates that the attempt to enter FUNC mode has failed due to entry being blocked by the ACCS function being set to NONE The only way to gain access to functions in this case is via CAL mode CAL1 ERR Calibration point 1 error The conductivity or resistivity input is too high check for correct cell constant selection check cell for short circuit CAL1 SPAN ERR Calibration point 1 span err...

Страница 46: ...hat the resistance across the cell is always greater than 80Ω If the resistance is less than this then it may be necessary to use a cell with a higher cell constant e g it may be necessary to change from K 0 1 to K 1 The resistance at any given conductivity level can be found from the formula Resistance Ohms 1 Conductivity cm K factor e g for a K 0 1 cell in a 2000 uS cm solution the resistance is...

Страница 47: ...de range 12 to 48V Special supply types 32VAC 48VAC 50 60Hz or DC isolated 50 to 110V also available Note supply type is factory configured Power Consumption AC supply 4 VA max DC supply consult supplier typical 80mA at 24VDC 160mA at 12VDC depends on display type and options Output standard 1 x relay Form A rated 5A resistive Relay Action Programmable N O or N C 7 2 Output Options Extra Relays Sa...

Страница 48: ...d representative of the manufacturing company Products for attention under guarantee unless otherwise agreed must be returned to the manu facturer freight paid and if accepted for free repair will be returned to the customers address in Australia free of charge When returning the product for service or repair a full description of the fault and the mode of operation used when the product failed mu...

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