EUTECH INSTRUMENTS Ion 700 Manual de usuario

Instruction Manual

pH 700 pH/mV/°C/°F Bench Meter

Ion 700 pH/mV/Ion/°C/°F Bench Meter

Technolo

ade

Part of Thermo Fisher Scientific 68X541701 Rev. 2 Sep 2010

TABLE OF CONTENTS

1. INTRODUCTION.............................................................. 1

2. GETTING STARTED........................................................ 2

2.1 Keypad Functions ...................................................................2

2.2 LCD Annunciators...................................................................3

2.3 Meter Connections..................................................................3

3. CALIBRATION................................................................. 4

3.1 pH Calibration .........................................................................4

3.2 Temperature Calibration .........................................................5

3.3 Millivolt (mV) Offset Adjustment..............................................6

3.4 Ion Calibration (Ion 700 Only) .................................................6

4. STORING AND RECALLING DATA ............................... 7

5. SETUP FUNCTIONS........................................................ 8

5.1 P1.0 CAL (Calibration)............................................................8

5.2 P2.0 ELE (Electrode Information)............................................8

5.3 P3.0 ConF (Configuration) ......................................................9

5.4 P3.1 rdY (Ready / Stability Indicator)......................................9

5.5 P3.2 °C°F (Celcius Or Fahrenheit)..........................................9

5.6 P3.3 buFF (pH Buffers & Calibration Points)...........................10

5.7 P4.0 rSt (Reset) .....................................................................10

5.8 P5.0 CLr (Clear Memory).......................................................10

6. TROUBLESHOOTING GUIDE......................................... 11

7. ION SELECTIVE ELECTRODES..................................... 13

8. SPECIFICATIONS............................................................ 14

9. WARRANTY..................................................................... 15

10. RETURN OF ITEMS......................................................... 15

1. INTRODUCTION

Thank you for purchasing our pH 700 / Ion 700 series benchtop

meter. These microprocessor-based meters are economical and

simple to use. The design incorporates a large LCD for clear

viewing, yet offers a small footprint to conserve space.

The pH 700 measures pH, mV (ORP), and temperature (ºC or ºF).

In addition to these parameters, the Ion 700 features direct ion

concentration measurement of various ions (mono and divalent).

Each meter includes a convenient slide-out card for

quick reference.

Some configurations include an electrode arm and metal bracket

which can be easily attached to the left or right side of the meter

according to your preference.

The 700 series benchtop meters replace our popular 510 series

meters that were introduced in 2000.

We take great pride in every instrument we manufacture and

hope this one serves you well.

2. GETTING STARTED

2.1 Keypad Functions

Powers the meter on and off. Upon power on, the meter

automatically begins in the mode that was last used.

Calibration and memory values are retained even if meter

is unplugged.

Toggle between available measurement modes;

pH/Temp, mV/Temp, or ppm/mV (Ion 700 only).

Also used to switch from pH to Temp during pH

calibration mode.

Press and hold for 5 seconds to enter SETUP mode.

Toggles between measurement and calibration modes.

In SETUP mode, returns user to the measurement mode.

MI (Memory Insert) stores values into memory.

SIncrease value. Scroll up in SETUP mode.

MR (Memory Recall) recalls values from memory

TDecrease value. Scroll down in SETUP mode.

Freezes measured reading. Press again to resume

live reading.

Confirms calibration values in CAL mode.

Confirms selections in SETUP mode.

View recalled values in memory mode.

2.2 LCD Annunciators

2.3 Meter Connections

pH BNC connection for pH, ORP (Redox), or Ion Selective

Electrodes (ISE).

REF Pin connection for half cell reference electrodes.

Requires separate half cell BNC electrode.

Note: REF is not commonly used and is not required.

ATC For Automatic Temperature Compensation probe.

DC Power supply.

3. CALIBRATION

3.1 pH Calibration

For best results, periodic calibration with known accurate standards is

recommended. Calibrate with standards that bracket your intended

measuring range while including a neutral standard (pH 7.00 or 6.86).

For example, if you expect to measure samples from pH 6.2 to pH 9.5,

calibration with 4.01, 7.00, and 10.01 will work well.

The 700 series meters can be calibrated with up to 5 buffers. The

non-volatile memory retains all calibration values upon meter shut down.

The following calibration standards are automatically recognized;

USA buffer group 1.68, 4.01, 7.00, 10.01, 12.45

NIST buffer group 1.68, 4.01, 6.86, 9.18, 12.45

See Section 5.6 to change the buffer group

To eliminate temperature errors associated with the pH electrode, attach

the automatic temperature compensation (ATC) probe for best accuracy.

Without temperature compensation, pH accuracy will worsen as samples

deviate from 25ºC and pH 7.

1) Press as needed to select pH.

2) Dip the pH and ATC electrodes into pH buffer and press . The

secondary display will lock on the appropriate buffer value. Provide

stirring for best results. When the READY indicator appears, press

to accept. The primary reading will flash briefly before the secondary

display begins scrolling the remaining available buffers.

3) Rinse the pH and ATC electrodes then dip into the next pH buffer. The

secondary display will lock on the appropriate buffer value. When the

READY indicator appears, press to accept. The primary reading

will flash briefly then display the percent efficiency (slope) before the

secondary display begins scrolling the remaining available buffers.

4) To calibrate another buffer repeat step 3) or press to return to the

measurement mode. Note: The meter will automatically return to

measurement mode upon successful completion of the number of

specified calibration points. To specify a different number of pH

calibration points see Section 5.6.

Additional notes:

A single point (offset) calibration is only allowed with pH 7.00 or

pH 6.86 buffers.

When the first calibration value is accepted during a new calibration,

all prior calibration values are erased.

Press at any time to abort calibration and return to measurement

mode.

3.2 Temperature Calibration

The thermistor sensor used for automatic temperature compensation and

measurement is both accurate and stable, so require frequent calibration

isn’t required. Temperature calibration is recommended upon electrode

replacement, whenever the temperature reading is suspect, or if matching

against a certified thermometer is desired.

1) Connect the temperature probe to the meter and place into a solution

with a known accurate temperature such as a constant temperature

bath. Note: To adjust the manual temperature compensation (MTC)

value, do not connect the temperature probe.

2) Press as needed to select pH or mV/R.mV.

3) Press followed by . The primary display shows the

measured temperature while the secondary display shows the factory

default temperature.

4) Adjust the temperature using or . Press to accept or

to cancel. The meter allows an adjustable maximum value of ± 5ºC

(or ± 0.9ºF) from the factory default temperature.

3.3 Millivolt (mV) Offset Adjustment

Oxidization Reduction Potential (ORP or Redox) is not a precise

measurement, but is useful as a relative indicator. As such, mV offset

adjustment is not meant to enhance accuracy, but rather to make readings

comparable to a reference. Commercial ORP solutions are often used as

a check standard in which a meter/electrode system are verified to be

close to a given value, instead of being used as a calibration standard in

which adjustments are made in an attempt to match the ORP value.

1) Connect an ORP electrode and press as needed to select mV

(or R.mV).

2) Dip the ORP electrode into a solution with a known mV value

(i.e. Zobel, Light’s, quinhydrone, or iodidetriiodide) and stir.

3) Press when the reading is stable. The primary display shows the

relative millivolt value (R.mV) while the secondary display shows the

factory default mV value.

4) Adjust the R.mV value using or . Press to accept or to

cancel. The meter allows an adjustable maximum value of ± 150 mV

from the factory default mV value.

Note: When an offset has been stored successfully, R.mV replaces mV.

3.4 Ion Calibration (Ion 700 Only)

The Ion 700 can measure ion concentration such as ammonia or fluoride

when using an ion selective electrode (ISE) for the specific ion of interest.

The available ion calibration values are 0.10, 1.0, 10.0, 100.0, and 1000

parts per million (ppm). Choose a minimum of 2 consecutive values for

calibration and prepare the corresponding ion calibration solutions. For

best results always begin with your lowest standard value, followed by

the next lowest standard.

1) Connect the ISE and press as needed to select ppm. Note: The

primary reading will show “- - - -” without a stored ion calibration. The

secondary value is the corresponding mV reading of the ISE.

2) Dip the ISE into your lowest standard solution value and stir. Press

when the secondary reading is stable.

3) Press or to match the primary display to your corresponding

ion calibration value (0.10, 1.0, 10, etc).

4) Press to accept or to abort. The primary display will show the

next highest calibration standard value.

5) Rinse the ISE then dip into the corresponding calibration standard

and stir.

6) Press to accept or to cancel. The mV/decade slope value will

be displayed briefly if the calibration is successful. “SLP Err” indicates

that the calibration for the current point was not successful. This occurs

when the slope (mV difference between two consecutive points) is

lower than 15mV/decade or higher than 90mV/decade.

7) Revert to step 3) to calibrate additional points or press as needed

to return to measurement mode at any time. Note: The meter will

automatically return to measurement mode upon successful completion

of the number of specified calibration points. To change the number of

ion calibration points see Section 5.6.

4. STORING AND RECALLING DATA

The 700 series meters can retain up to 100 points into memory for

later retrieval.

1) In the measurement mode, press to insert the measured value into

memory. The stored memory location value (StO) is briefly displayed.

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