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Eltek Squirrel 1000 Series, Руководство пользователя

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Eltek Squirrel 1000 Series Скачать руководство пользователя страница 52

 

52

If the  display is  showing 

‘O/RANGE’ when the 

set

  button  is  pressed,  the 

display  will  show 

‘CANNOT  SET’  to  indicate  that  the  probe  cannot  be 

calibrated. The  Squirrel  retains  its  previous  calibration  setting. Select the 
next pH channel with the select button, and calibrate it in the same way. 
This must be done for all the channels that are required. 

9.5  Calibrating the Slope 

The  second  calibration  point  is  the  slope.  The  pH  of  the  buffer  solution 
used  in  this  function  should  be  set  in  the  STAT  function,  as  described 
above.  Once  that  is  set  as  desired,  calibration  of  the  slope  can  be 
performed  in  this  function.  The  probes  must  be  rinsed,  placed  in  the 
specified  buffer  solution,  and  allowed  time  to  settle.  If  the  temperature 
compensation  is  being  measured,  then  the  temperature  probes  must  be 
put in the same solution. 
 

S  L  O  P  E  9      c  h    9         

      9  .  3  1    p  H             

 
Once the probes have settled, the display should show 

‘SLOPEn’ (where 

‘n’  is  4,  9  or  10).  If  this  does  not  match  the  solution  that  is  being  used, 
then the slope value in the STAT function must be changed appropriately 
(see  above).  If  it  reads 

‘O/RANGE’,  then  the  pH  input  is  too  far  out  of 

range of the preset value for the Squirrel to be calibrated to it. Again, this 
is  typically  caused  by  a  pH  probe  that  has  expired.  Once  the  value  has 
settled, press and hold the 

set

 button. 

‘HOLD TO CHANGE’ will appear on 

the display and then the logger will recalibrate itself on the current channel 
to read the correct value (in this example, 9.00 pH): - 
 

S  L  O  P  E  9      c  h    9         

      9  .  0  0    p  H             

 
If the  display is  showing 

‘O/RANGE’ when the 

set

  button  is  pressed,  the 

display  will  show 

‘CANNOT  SET’  to  indicate  that  the  probe  cannot  be 

calibrated. The  Squirrel  retains  its  previous  calibration  setting. Select the 
next pH channel with the select button, and calibrate it in the same way. 
This must be done for all the channels that are required. 

9.6  Current Consumption and Battery Life 

Due  to  the  sensitive  nature  of  pH  probes,  the  Squirrel  has  to  provide  a 
constant power supply to the pH input circuitry when pH inputs are in use. 
This  power  supply  is  switched  on  when  one  or  more of the  pH  channels 

Содержание Squirrel 1000 Series

Страница 1: ...re about the functions of the datalogger 13 4 1 The LOG function 13 4 2 The METER function 15 4 3 The REVIEW function 16 4 4 The TIME and date function 17 4 5 The delayed START function 17 4 6 The INT...

Страница 2: ...channels 50 9 1 Channel Selection 50 9 2 Pre setting the Temperature 50 9 3 Choosing the Calibration Point 51 9 4 Calibrating the Midpoint pH7 0 51 9 5 Calibrating the Slope 52 9 6 Current Consumption...

Страница 3: ...age 62 13 Technical data 63 13 1 Inputs ranges and resolutions 63 13 2 Specification 64 14 Connectivity 65 14 1 Signal connector 65 14 2 Output connector for connection to a PC 65 Declaration of Confo...

Страница 4: ...e logger but some functions can only be accessed through Darca These include Scaling EU units in a channel SMS Alarm operation For more information on using Darca consult the document TM1020 Overview...

Страница 5: ...gger is currently logging then the first reading in the current run is displayed 2 4 TIME date Displays the real time and date on two lines The 24 hour clock may be displayed in the appropriate countr...

Страница 6: ...which could include engineering units if these have been set up by Darca This function also displays how many channels have been selected to record 2 10 STAT status This function displays the followin...

Страница 7: ...ars T I M E 1 0 4 3 1 1 H O L D T O C H A N G E Hold set button and cursor will appear the clock will stop T I M E 1 0 4 3 1 7 d a t e 2 5 1 2 9 4 Press select to move cursor T I M E 1 0 4 3 1 7 d a t...

Страница 8: ...0 Press select to move cursor I N T l o g 0 0 0 0 3 0 s a m p l e 0 0 0 0 0 0 Press set to change value I N T l o g 0 0 0 0 3 5 s a m p l e 0 0 0 0 0 0 This example changes the logging interval from...

Страница 9: ...s until you have configured at least one channel In this case pressing the function key will only display the following message C H A N N E L S E T U P N O N E S E L E C T E D Please proceed to the fo...

Страница 10: ...ropriate voltage current range is then selected from the existing hardware ranges e g 0 1 V In the above example 0 50 m s 0 1V and the display in METER mode will show readings in m s All data in this...

Страница 11: ...ygroclip S3 HC2 These probes plug into any voltage current input selected using the CHANNEL SETUP function Press and hold set for 3 seconds to change an unused voltage current channel to the default E...

Страница 12: ...12 3 6 Stop logging Press function to wake up the logger L O G o n u s e d 1 2 3 Hold set to stop logging L O G o n H O L D T O S T O P L O G o f f u s e d 1 2 3...

Страница 13: ...sed see 0 the logger waits for a specific time and date to start logging and the following is displayed L O G w a i t i n g u s e d 0 Alternatively this may indicate that externally triggered recordin...

Страница 14: ...1 2 3 4 5 N B you can only start and stop logging when the display shows either of these screens 4 1 4 How to clear the memory The procedure for clearing the memory has been designed to reduce the ris...

Страница 15: ...R c h 5 0 3 4 0 V M E T E R c h 7 5 2 9 L u x 4 2 1 Pulse count channels When viewing a pulse count channel in METER mode the display will show an accumulating total of pulse counts This total may be...

Страница 16: ...R mode M E T E R c h 1 1 1 2 3 s 4 3 The REVIEW function The display shows the recorded value of the selected channel starting with the first reading in the most recent run or the first reading in the...

Страница 17: ...ated The logger modifies the entries to the nearest valid setting and displays a warning that the initial entries were invalid For example the following would occur in UK date format i e DD MM YY T I...

Страница 18: ...art time before commencing logging In this case the following message will be displayed S T A R T 0 0 0 5 5 5 d e l a y e d s t a r t N B Remember that you must also set the logger to start logging in...

Страница 19: ...is shown on the bottom line and can be set between 1 second and 12 hours provided that a logging mode including averaging is selected M O D E l o g a v e r a g e M O D E l o g e v e n t a v e r a g e...

Страница 20: ...used Eltek Squirrels with serial numbers 6000 and above will work at up to 38400 baud During downloading the number of blocks to be downloaded is displayed and this number changes after each successfu...

Страница 21: ...during this interval The logger records the first readings as soon as logging is started although pulse inputs record a dummy value at this point Please see section 3 2 for instructions on how to chan...

Страница 22: ...with the time and date of the event b readings are also taken and stored from all other channels which have been set to log c if a pulse channel has been selected then the number of pulses accumulate...

Страница 23: ...23 voltage high contacts open contacts open contacts closed contacts closed high low low time event event event event event event event event...

Страница 24: ...n averaged values of the selected channels to be recorded whenever an event occurs see 0 Pulse inputs record a dummy value when events occur and true accumulated values are only recorded after each re...

Страница 25: ...adings will be recorded in only one run This will be of value if you need to analyse these triggered events on one time axis The time channel is selected automatically to log the time between recordin...

Страница 26: ...available memory has been used Note that you may view remaining free memory at any time by entering the LOG function and pressing select see section 4 1 2 and the memory size may be restricted down t...

Страница 27: ...f the channels Some of the channels may not be currently selected and these will be indicated as follows C H 5 n o t u s e d Holding down the set button will allow you to set up the channel C H 5 H O...

Страница 28: ...nts such as types K and T thermocouples or 3 and 4 wire platinum resistance sensors For example a logger with thermocouple inputs will offer the following ranges C H 1 C 2 0 0 0 2 0 0 0 where the reso...

Страница 29: ...t one pulse count channel except 451 851 loggers Typical applications are outputs from tipping bucket rain gauges optical meter readers etc Any sensor offering the following outputs can be monitored a...

Страница 30: ...open voltage high The number 0 or 1 is called the state If you have selected to log in any of the event modes see section 4 8 6 then the last event channel will be automatically selected A typical ap...

Страница 31: ...power supply S T A T e x t s u p p l y 8 9 V The logger can be used with an Eltek external DC power supply type MP12U if GSM modem use anticipated or MP12U5W in all other situations These are ultra lo...

Страница 32: ...y allows you to switch the sensor on between 1 second and 60 seconds in 1 second increments prior to measurement all sensor power outputs will turn on together The maximum total current available is 5...

Страница 33: ...and holding set S T A T d a t e f o r m a t Y Y M M D D S T A T d a t e f o r m a t M M D D Y Y 4 10 6 Language format selection S T A T l a n g u a g e E n g l i s h This displays the language format...

Страница 34: ...gger 4 10 9 Temperature Units This function enables you to change the temperature units in the Squirrel between degrees Fahrenheit and Celsius If this is changed you must change the range using Channe...

Страница 35: ...nnected to the cable screen if any 5 2 Wiring up platinum resistance sensors Individual plug in terminal blocks with cable restraints are provided to make the connections to the inputs on the datalogg...

Страница 36: ...sensor output v v c o sensor output sensor power Note if the cable used has an independent screen this may be connected to the ground terminal which is marked o 5 4 Wiring up sensors to current chann...

Страница 37: ...end on the state of the internal batteries or the voltage of the external power supply if present Some models have the option to change the sensor power to 5V DC 0 1 This is dealt with in section 4 10...

Страница 38: ...ent sensors Rogowski coils Voltage Transducers and Current Transducers can be connected to any of the AC voltage inputs Some inputs also allow thermistors to be connected For 1010 1020 electricity log...

Страница 39: ...free contact input e g relay the contact debounce circuit must be connected This involves linking the pin to the s pin s s sensor output volt free contact Note the connection is ground and should be c...

Страница 40: ...ute an event The above diagram shows all events being monitored using contact closures but events may also be monitored using changes in voltage levels see 0 1000 Series loggers with additional event...

Страница 41: ...g can be started or stopped by an external signal This external signal can be in the form of a voltage or a contact and should be connected between pin 14 and common ground See 4 8 11 for further info...

Страница 42: ...form multiple runs if memory is in continuous mode reset pulse count while logging is in progress change date and time while logging change start date and time while logging change log and sample inte...

Страница 43: ...earch for SRAM in Windows Help for information on how to do this 7 2 1 Formatting the card Open Darca s Memory Card Utils feature it is accessed from the File menu Your SRAM card will appear under the...

Страница 44: ...e following C A R D p r e s e n t H O L D T O C L E A R If the size of the card is not displayed it is due to one or more problems The nature of the problem is clearly stated on the display C A R D p...

Страница 45: ...e m o r y If there is any Squirrel data present in the card then the display will show the following C A R D h o l d s d a t a u s i n g m e m o r y By default the internal memory is used If you have...

Страница 46: ...ear It is possible to copy to the card while the Squirrel is logging to its internal memory though this may take longer Note that this function cannot be accessed while the Squirrel has been set up to...

Страница 47: ...47 to be stored in with the second Browse button Click the Convert button to copy the data from the SRAM card and store it on your PC as the chosen DAT file...

Страница 48: ...logging the Squirrel monitors each selected channel for peak values This function allows the user to review the maximum logged value on each channel M A X I M U M c h 1 2 4 8 8 V Along with the maxim...

Страница 49: ...ermistor 25 0 to 125 0 C 0 1 C 9 17 Pulse count 0 to 65 000 1 0 to 650 000 10 10 18 Digital 0 to 255 State 00000000 to 11111111 8 3 Making connections to the datalogger It is possible to connect many...

Страница 50: ...will perceive this as an error and switch the range to use the pre set compensation In this situation the display will show INVALID CHECK to alert the user that this has happened C H 9 p H c h 1 0 0...

Страница 51: ...ow the calibration settings see below Place each probe individually in a pH7 buffer solution and allow it time to settle the time this takes will depend on the probe and how it has been stored or used...

Страница 52: ...h the solution that is being used then the slope value in the STAT function must be changed appropriately see above If it reads O RANGE then the pH input is too far out of range of the preset value fo...

Страница 53: ...a very high or very low pH may take a while to settle Occasionally the output of a probe may continue to wander never really settling on a value This is an indication that the probe has expired and sh...

Страница 54: ...elect until the required channel is displayed Then press and hold set to enter the edit mode L O W A L A R M c h 1 H O L D T O C H A N G E A lower alarm threshold will appear for editing The value use...

Страница 55: ...is triggered when the alarm is exceeded for the delay interval The logger must be logging for an alarm to be reported Meter When metering the display will show two asterisks when you are viewing a ch...

Страница 56: ...ge it is not averaged as 0 5V dc as this would cause an erroneous readings under certain conditions e g When the direction varied around North say 375 to 5 the mathematical average would be 180 which...

Страница 57: ...tion other than LOG can be selected This is true even if the interval is for example 8 4 seconds If the interval were 8 seconds or 9 seconds this restriction would not apply as the logger would behave...

Страница 58: ...Export and choose Generate Elapsed Time Column 11 3 Darca Contact It is not possible to contact the Squirrel for either controlling or downloading while it is logging in fast logging mode Logging must...

Страница 59: ...inals are connected through a 1MW resistor network to the datalogger ground At all other times both terminals are floating Datalogger ground may become connected to mains earth ground e g via a mains...

Страница 60: ...at one of the following procedures is used to change the batteries otherwise memory and logger settings may be lost Stop logging remove the batteries and wait at least 2 minutes before fitting new bat...

Страница 61: ...must be removed one is hidden under a battery contact in the battery box The top of the case can then be lifted off The 1A fuse on the board with the external power connector is for the external power...

Страница 62: ...d to 260K reading memory by installing chip only Current standard memory is 260K reading memory Increasing memory to 500K or 1 000 000 or 2 000 000 reading memory is by substituting chip with appropri...

Страница 63: ...2 F 0 1 C Impedance 100kW 200 to 450 C 328 to 842 F 0 2 C 200 to 1200 C 328 to 2192 F 0 5 C PT100 temperature P3 P4 200 to 100 C 328 to 212 F 0 1 C 200 to 400 C 328 to 752 F 0 2 C 200 to 600 C 328 to...

Страница 64: ...th 8 channels recording every 5 minutes Clock accuracy 1 second day at 20 C Physical details Dimensions l 180 mm x h 120 mm x s 60 mm or d 85 mm depth may be greater depending on model Weight includin...

Страница 65: ...11 Relay contact 1 12 Relay contact 2 13 Digital ground 14 External trigger input 15 Spare input 14 2 Output connector for connection to a PC The connector marked output is for communications between...

Страница 66: ...8 The preferred adaptor is the NewLink USB Serial Convertor type NLUSB0039 which is available from Eltek Note Not all USB adaptors are compatible Ensure the device is installed correctly and make a no...

Страница 67: ...m that this instrument conforms to the requirements of the EMC Directive 89 336 EEC amended 92 31 EEC and carries a CE mark indicating conformity Applied Standards Harmonised European Standard EN50081...

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