USER-MANUAL EPH-119
Contents
1. 7 and OH 9 Possibility for manual calibration with other buffer solutions 3 Temperature Electrode Range Resolution Accuracy 1 Point calibration manual in steps of 0 1 C RTD Pt1000 0 65 C 0 1 C dependent on calibration Manual temperature adjustment when temperature electrode is not connected in steps of 0 1 C with the and buttons 4 General Power supply Absorption Low battery indication Display Size Weight instrument Label Guarantee 9V battery 4 x 1 5V on request EPH 119 15mA EPH 119RS 25mA BATT LCD 3 digit gt 190x135x45mm 460 grams polycarbonate membrane 1 year 3 months on pH electrode The chosen measurement will by indicated by a blinking LED at the corresponding button Switching off the instrument can be manual or automatic The time before the instrument switch off can be adjusted at 90 or 180 seconds CHAPTER 3 MEASURING WITH TEMPERATURE COMPENSATION IN A LIQUID EC measurement z THs UN W 1 Press the EC button The LED on the button will be blinking pH measurement T pH 1 Push the pH button The LED on button will blink 2 Put the EC electrode into 3 Wait until the value is stable 4 Clean the electrode with demi the liquid and rinse carefully and read the measurement water and store dry 2 Remove the rubber cap rinse 3 Put the EC and pH electrodes in 4 Wait until the value is the the el2. on the display tissue 13 Place the pH electrode in the 14 While the value blinks and 15 When the value is stable it 16 When the liquid is recognised pH 4 solution and rinse carefully the sign is visible the meter will be compared to the standard the value at that temp is shown Place the EC electrode in a liquid checks the stability values on the display with the same temperature as the pH 4 solution for instance EC 4 solution a fi pH 17 If this is the right value 18 Clean the EC electrode with 19 Clean the pH electrode with 20 Fill the rubber cap with confirm by pressing the pH button demiwater and store it dry demiwater storage liquid and put it on the pH electrode lf the buffer solution is not a standard buffer solution pH 4 pH 7 or pH 9 the liquid will not be recognised In this case you must follow steps 1 to 5 from above and steps 6 to 8 here under aJ value of the calibration 8 Confirm the value by pressing will be shown on the display liquid with the or button the pH button 6 When the value is stable it 7 Set the lf the instrument is not temperature compensated the temperature has to be manually set before calibration This procedure is described in chapter 4 To stop the calibration procedure prematurely push the temperature or EC button during calibration The instrument can be set to factory calibration by pressing the and buttons together with the
3. PH xx xxmS 11 Serial port configuration Baud rate 1200 bit sec Data 8bit Parity NONE Stop 1 bit Flow control NONE Serial port connections DB9 M Rx pin 2 TX pin 3 GND pin 5 Data can be received and memorised by using a standard Terminal program Terminal exe Hyperterminal exe etc which is configured as above described Example EPH119RS DB9 M DB9 M of P C Rx 2 3 Tx TX 3 2 Rx GND 3 5 GND CHAPTER 11 MAINTENANCE For a long lifetime and reliable measurements we advise the following Store the instrument in a dry room Do not expose the instrument to high temperature changes because of condensation To clean the outside of the instrument use a moisten cloth Clean the electrodes after measurement always with distilled water Protect the pH electrode against desiccation by storing it always in storage liquid Protect instrument and electrodes against high shocks and dirt CHAPTER 12 STABILITY CHECK When in automatic calibration the instrument will check for a stable reading of the measuring value A pH reading is considered stable by the instrument when the difference between 4 readings tested from 1 to 8 seconds is less then 0 01 pH A EC reading is considered stable by the instrument when the difference between 4 readings tested from 1 to 8 seconds is less then 0 025 mS 12
4. USER MANUAL EPH 119 NIEUWKOOP B V AALSMEER HOLLAND Temperature compensated EC pH C meter with automatic calibration Rev from SNO75663 PREFACE Congratulations with your Nieuwkoop EC pH C meter with automatic temperature compensation and calibration With the EPH 119 it is very easy to measure EC pH and temperature in liquids and soils The instrument is supplied in a useful carrying case complete with calibration liquids and all the accessories needed for measuring water and soil samples Due to 40 years of experience from Nieuwkoop BV in the agriculture and horticulture the reliability user friendliness and accuracy of the instrument are guaranteed We wish you good luck with the instrument Chapter l Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Chapter 10 Chapter 11 Chapter 12 CONTENTS PIOIACO ostun e eean 1 COMENTS igs T E 2 Functional descriptos T E 3 TECHAICAISDSCMICATIONS merisier iaid Suita neuburlineusd aad peulstetna 4 Measuring with temperature compensation in a liquid c ceeeeeeeeeeees 5 Measuring without temperature compensation in a liquid cceee 6 Meas nno EG and DRAM SOlleiiict A aucteelettal chloe aac eedvesreneiasieinaienceteced 6 CANO OM ees a ensues 7 Switching the instruMent Off oarenien ara 10 Adjustment of the reference temperature cccceeeeeeeecceeeeeeseeeesseeeeeeeees 10 EOF MMe oe O
5. e So aucacrharenrttoatnasanunnetsdtst ae deba castes ca tuosioannis tot sh Shaetee tat teen cece 11 TCE PEAT ORS O rna a TS 11 MaN eNaNG Caserna an 12 taD CHC Cle sensed e a sh A R 12 CHAPTER 1 FUNCTIONAL DESCRIPTION EC pH meter EPH 119 MICROCOMPUTER Display Temp adjustment time adjustment Temp adjustment time adjustment EC button Temp button PH button Connection EC electrode black cable Connection temp electrode red cable Connection pH electrode 10 Read out 11 Time adjustment indication 12 Stability check indication 13 Low battery indication OCOnNOORWND gt gt CHAPTER 2 TECHNICAL SPECIFICATIONS 1 EC Range Resolution Accuracy Temperature compensation Temperature coefficient Reference temperature 0 20 00 mS 0 01 mS dependent on calibration manual or automatic by electrode 2 2 C during calibration 2 1 C adjustable to 18 20 or 25 C during calibration fixed to 25 C 1 Point calibration with automatic recognition of standard buffer solutions 2 mS and 4 mS KCl Possibility for manual calibration with other buffer solutions 2 pH Range Resolution Accuracy Temperature compensation Recognition pH 7 Recognition pH 4 0 14 00 pH 0 01 pH dependent on calibration manual or automatic by electrode 1 00 pH 90 105 2 Points calibration with automatic recognition of standard buffer solutions pH 4 pH
6. ectrode in demiwater the liquid and rinse carefully stable and read the measurement 5 Clean the EC electrode in demiwater and store dry 6 Clean the pH electrode with 7 Fill the cap with storage demiwater liquid and put it on the pH electrode Temperature measurement k E TEMP 7 as 1 Push the temp button The LED on the button will blink 2 Put the EC electrode into the 3 Wait until the value is stable 4 Clean the electrode with liquid and read the measurement demiwater and store dry CHAPTER 4 MEASURING WITHOUT TEMPERATURE COMPENSATION IN A LIQUID To measure without temperature compensation temperature probe not connected before measurement the temperature has to be adjusted as follows F aiv A 1 Push the temp button The LED 2 Measure the temperature with 3 The adjusted temperature is 4 Adjust the right temperature on the button will blink the thermometer indicated on the display with the or button Afterwards measurements can be done as in chapter 3 CHAPTER 5 MEASURING EC AND pH IN SOIL For measurements of EC and pH in soil firstly we have to make a soil sample For a extraction of 1 2 the next steps has to be followed Fill the ABC sample cup up to line C with demiwater Add soil to the sample cup up to line A remove stones etc Shake the cup firmly Wait until the soil has settled down and measure EC and or pH in the water above see Chapter 3 N
7. o 8 here under D0 i vite 6 When the value stabilise this 7 Adjust the value of the solution 8 Confirm the value by pressing will be indicated on the display manual with the or button the EC button Fri p If the instrument is not temperature compensated the temperature has to be adjusted manually See Chapter 4 To stop the calibration procedure prematurely push the temperature or pH button during calibration N The instrument can be set to factory calibration by pressing the and buttons together with the EC button during calibration pH calibration os pH 1 Keep the pH button pressed 2 Release the button when CAL 3 PH1 appears on the display 4 Remove rubber cap from the appears on the display De LED you are now in the calibration electrode on the button will burn mode 5 Clean pH and EC electrode with 6 Place the pH electrode in the 7 While the value blinks and the 8 When the value is stable demiwater and make them dry pH 7 solution and rinse carefully sign is visible the meters it will be compared with the Place the EC electrode in aliquid checks the stability standard values with the same temperature as the pH 7 buffer solution r pH 9 When the solution is recognised 10 When this is the right value 11 PH2 will appear on the display 12 Clean the pH electrode with the value at that temp is shown confirm by pushing the pH button demiwater and dry it with a
8. ow you are measuring EC and or pH in an extraction of 1 part soil and 2 parts water When soil extracts too much water for example dry peat we need to make a soil sample of 1 part soil to 5 parts water Fill the sample cup up to line B with demiwater and up to line A with Soil In order to get the EC value of a 1 2 extraction the measured EC has to be multiplied by 2 5 CHAPTER 6 CALIBRATION TAKE CARE The EPH 119 is programmed for the Nieuwkoop calibration liquids Use always original calibration liquids of Nieuwkoop BV Take care the liquids are always fresh EC calibration fs EC of 1 Keep the EC button pressed 2 Release the button when CAL 3 On the display appears EC1 4 Clean the EC electrode with appears on the display The LED This means that you are in the demiwater and make it dry on the button will burn calibration mode 5 Put the electrode into the EC 4 6 While the value blinks and the 7 When the value is stable it 8 When the value is recognised buffer solution and rinse carefully sign is visible the meter will be compared to the standard it appears on the display checks the stability values i co 9 When this is the right value 10 Clean the electrode with demi confirm by pushing the EC button water and store it dry When a buffer solution is not standard 2mS of 4mS the solution will not be recognised In this case you must follow steps 1 to 5 from above and steps 6 t
9. pH button during calibration Temperature calibration i oa TEMP UM 1 Keep the temp button pressed 2 Release the button when the 3 Now t 1 will appear on the 4 Clean the EC electrode with display indicates cal The LED display This means that we are demi water and dry the electrode Will stay alight in the calibration procedure EW 5 Place the electrode in a liquid 6 As long as the measuring 7 When the value is stable 8 When the temperature is not from which the temperature is is blinking and the sign is compare this with the real right adjust this with the or known alight the stability will be checked temperature the button g TEMP 9 When you have the correct 10 Clean the electrode with Demi value confirm this by pressing water and store it dry The C button To stop the calibration procedure prematurely push the EC or pH button during calibration co The instrument can be set to factory calibration by pressing the and buttons together with the Temp button during calibration CHAPTER 7 SWITCHING THE INSTRUMENT OFF The instrument can be switched off manually as follows 1 Keep the EC and pH buttons 2 Release the buttons when pressed OFF is shown on the display The instrument will switch off automatically after 90 or 180 seconds The time can be adjusted as follows 1 Keep the and buttons 2 display shows the set time 3 Keep the and buttons p
10. pan pH 4 calibration of the electrode is out of range gt 105 SL The span pH 4 calibration of the electrode is out of range lt 90 During EC calibration the following error messages can appear on the display ERR8 The calibration of the electrode is out of range 70 100 Press the EC button to stop the error message During 10 seconds one of the following messages will appear on the display SH The span EC 4 calibration of the electrode is out of range gt 130 SL The span EC 4 calibration of the electrode is out of range lt 70 During temperature calibration the following error messages can appear on the display ERR4 followed by AH The calibration of the electrode is out of range 2 0 C Press the Temp button to stop the error message The instrument will continue temperature measurement When one of these error messages occurs check if the buffer solutions have the right values and that the electrode is properly placed into the liquid Check also if the electrode is properly connected to the instrument Start the calibration procedure again When the error message still appears contact your supplier CHAPTER 10 THE EPH 119RS The EC pH C meter EPH119RS is provided with a serial port RS232 and can be connected with any equipment with a RS232 serial port Data are sent every 0 3 seconds i e every time the display of the EPH119 is updated Data format XX XX C XX XX
11. ressed pressed in seconds with the time adjustment until the desired time is shown indication CHAPTER 8 ADJUSTMENT OF THE REFERENCE TEMPERATURE The temperature compensation of the EC measurement Is always referring to a standard temperature This value differs per country and per branch Because of this the reference temperature is adjustable Standard it will be 25 C other options are 18 C or 20 C Only the reference temperature of the measurement is adjustable During calibration the reference temperature is fixed to 25 C The reference temperature adjustment is as follows IS 1 Keep the temp and EC buttons 2 Release the buttons when 3 Now r 25 will appear on the 4 Adjust with the or at the same time pressed cal is written on the display display This means that you are button the right reference the two LED s will keep alight in the calibration procedure Temperature 1 Confirm with the EC or the Temp button 10 CHAPTER 9 ERROR MESSAGES During pH calibration the following error messages can appear on the display ERR1 The zero pH 7 calibration of the pH electrode is out of range 1 00pH ERR2 The span pH 4 calibration of the pH electrode is out of range 90 105 Press the pH button to stop the error message During 10 seconds one of the following messages will appear on the display AH The zero pH 7 calibration of the electrode is out of range 1 00pH SH The s
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