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Summary of Contents for XS Instruments pH 70 Plus
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Page 2: Table Of Contents
Index Introduction ................................4 Measurement parameters ............................4 Basic features ................................4 pH measurement features (suited for model pH70+DHS and PC70+DHS) .............. 4 Conductivity measurement features (suited for model COND70+ and PC70+DHS) ..........4 Data sheet ................................5 Instrument Description ............................6 LCD Display ................................ - Page 3 Temperature coefficient ............................15 Avoid contamination of standard solution ......................16 Due calibration ............................... 16 Check the calibration date ............................. 16 Conductivity Calibration ............................16 Customer calibration ............................. 17 Measure ................................. 18 Factory default setting ............................18 Conductivity electrode maintenance ........................18 Relations between TDS, Salinity and conductivity ....................
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Page 4: Introduction
Introduction Thanks for purchasing 70+ series portable pH/Conductivity meter. This meter is perfect combination of the most advanced electronics, sensor technology and software design, and is the most cost effective portable electrochemical meter suited for industrial and mining enterprises, power plant, water treatment engineering, environmental protection industry, etc, especially suited for application in field. -
Page 5: Data Sheet
Data sheet Specifications Models （-2.00 ~ 16.00）pH Range Resolution 0.1/0.01 pH Accuracy ±0.01 pH ±1digit Temperature （0 ~ 100）°C（manual or automatic） compensation pH 70+ Multi-point 1-3 point calibration PC 70+ USA: 1,68 - 4,00 - 7,00 - 10,01pH Buffer value NIST: 1,68 - 4,01 - 6,86 - 9,18pH 2 value CUSTOMER Range... -
Page 6: Instrument Description
Instrument Description LCD Display The instrument is provided with three-color backlit display to help the user get a quick and intuitive understanding of how to use them • Green: Measurement and setup mode • Blue: Calibration mode • Red: Alarm/Error (1) —... -
Page 7: Meter Connections
Keypad Operations Descriptions • In the power-off mode, press this key to turn on the meter • Momentary press In the measurement mode, press this key to turn on or turn off the backlight display Long press In the measurement mode, press and hold this key for 2 seconds to turn off the meter •... -
Page 8: Stability Indication
Stability indication When the measuring value is stable, smiley icon appears on LCD. If the smiley icon does not appear or flash, please do not get the reading value, or make calibration until the measuring value is stable. In the parameter P1.6, there are 3 criteria for stability standard: -Normal (default) -High (longer time) Low (shorter time.) -
Page 9: Ph Measurement
pH Measurement pH electrode information On this meter is possible to use electrode with integrated temperature sensor else link two different probes for pH and temperature. The BNC socket of electrode connects pH socket, RCA socket connects temperature socket. When dip the electrode in the solution, please stir the solution briefly and allow it to stay in the solution until a stable reading is reached. -
Page 10: Due Calibration
The meter must be recalibrated in the following situations: (a) New probe, or probe that is unused for a long period of time (b) After measuring acids (pH<2) or alkaline solutions (pH>12) (c) After measuring a solution that contains fluoride or a concentrated organic solution Due calibration Pre-set calibration interval (begin from the date of last calibration) to remind due calibration in a preset period per parameter P1.2 (DC) -
Page 11: Customer Calibration
Take out pH electrode，rinse it in pure water, allow it to dry, and submerge it in pH10.01 buffer solution. Stir the solution briefly and allow it to stay in the buffer solution until a stable reading is reached. The meter’s will show scanning and locking process of calibration buffer solution at the bottom right of LCD. -
Page 12: Measurement
The meter can perform 1-2 point customer-defined calibration. When the 1 point calibration is done, press key, the meter exits from calibration mode. This is one-point customer-defined calibration. As for the standard calibration the meter show on the LCD one or more icons indicating the suited range User’s pH buffer Icons show on the display 6.5 –... -
Page 13: Self-Diagnosis Information
Self-diagnosis information Display Icons Contents Checking 1.Check whether pH buffer solution is correct. Wrong pH buffer solution or the 2.Check whether the meter connects the recognition of calibration solution out of electrode well. range 3.Check whether the electrode is damaged. Press key when measuring value is not stable during calibration. -
Page 14: Mv Measurement
Contamination Abluent Inorganic metal oxide Dilute acid less than 1mol/L Organic lipid Dilute detergent (weak alkaline) Resin macromolecule Dilute alcohol, acetone, ether Proteinic haematocyte sediment Acidic enzymatic solution (saccharated yeast tablets) Paint Dilute bleacher, peroxide Note: if the electrode housing is polycarbonate. When use abluent, take cautions on carbon tetrachloride, trichlorethylene, tetrahydrofuran, acetone, etc which will dissolve the housing and invalidate the electrode. -
Page 15: Conductivity Calibration Solutions
＜20 μS/cm Range 0.5 μS/cm~100 mS/cm ＞100mS/cm Conductivity K=0.1 cm K=1.0 cm K=10 cm electrode constant Standard solution 84μS/cm 84 μS/cm 1413 μS/cm 12.88 mS/cm 111.9 mS/cm Conductivity calibration solutions The meter uses conductivity standard solution of USA series. The meter can recognize the standard solution automatically, can perform one-point or multi-point calibration (the maximum is four-point calibration). -
Page 16: Avoid Contamination Of Standard Solution
Solution Temperature compensation coefficient NaCl solution 2.12%/°C 5% NaOH solution 1.72%/°C Dilute ammonia solution 1.88%/°C 10% hydrochloric acid solution 1.32%/°C 5% sulfuric acid solution 0.96%/°C Avoid contamination of standard solution Conductivity standard solution has no buffer. Please avoid being contaminated during usage. Submerge the electrode in standard solution before wash the electrode and allow it dry. -
Page 17: Customer Calibration
Single point Submerge the cell in a conductivity calibration Press key to Sampe standard solution: Press to turn Test enter into the • 84 μS on the meter calibration mode • 1413 μS M • 12.88mS H • 111.9mS H Press key when icon appears,... -
Page 18: Measure
Measure Rinse conductivity electrode in pure water, allow it to dry, and submerge it in the sample solution. Stir the solution briefly and allow it to stay in the sample solution until a stable reading is reached and stability icon appears on LCD, then get the reading value which is the conductivity value of the solution. During the process of calibration and measurement, the meter has self-diagnosis functions Display Icons Contents... -
Page 19: Datalogger Functions (Ph70+Dhs, Cond70+, Pc70+Dhs)
Common used TDS conversion factors Conductivity of solution TDS conversion factor 0-100 μS/cm 0.60 100-1,000 μS/cm 0.71 1-10 mS/cm 0.81 10-100 mS/cm 0.94 Datalogger functions (pH70+DHS, COND70+, PC70+DHS) Manual storage When icon appears, press momentarily key, M+ icon and storage serial number appear on LCD, storing measuring information. Automatic timing storage Set the storage timing into the setup menu P6.3, icon appears on LCD... -
Page 20: Setup Menu
Setup Menu Main menu In the measurement mode, press key to enter in P1.0, then press to slide the main menu: P1.0→P2.0→P3.0→P6.0. P1.0: pH parameter setting menu, P2.0: Conductivity parameter setting menu, P3.0: TDS parameter setting, P6.0: Basic parameter setting menu. Submenu P1.0 mode, press... - Page 21 Main menu of parameter setting Submenu of pH parameter setting P1.1 Select pH standard solution P1.2 Set due calibration P1.3 Check calibration date P1.4 Select resolution P1.5 Restore to factory setting P1.6 Set stability criteria P1.7 Temperature calibration Submenu of conductivity parameter setting P2.1 Select electrode constant P2.2 Select conductivity standard solution P2.3 Set due calibration...
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Page 22: Connection To Pc And Datalink70 V1.4 Software (Ph70+Dhs, Cond70+, Pc70+Dhs)
Connection to PC and DataLink70 v1.4 software (pH70+DHS, COND70+, PC70+DHS) USB connection With this series of instruments the user has the possibility to link the device with a PC through USB , in order to: • Improve the management of the values stored with datalogger memory mode •... -
Page 23: Appendix I: Parameter Setting & Factory Default Setting
Appendix I: Parameter setting & Factory default setting Restore to Modes Prompts Parameter setting items Abbreviation Description factory default P1.1 Select pH buffer solution USA－NIST－CUS P1.2 Set due calibration No－H00－D00 Check the date of the last P1.3 calibration P1.4 Select resolution 0.01－0.1 0.01 P1.0... -
Page 24: Appendix Ii: Self-Diagnosis Information
Appendix II: Self-diagnosis information Icons Self-diagnosis information Conductivity Wrong pH buffer solution or the meter recognition of √ √ calibration solution out of range √ √ Press key when measuring value is not stable during calibration During calibration, the measuring value is not stable for √...
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