Oakton PH 5+ Bedienungsanleitung

Instruction Manual

pH 5+ pH/°C

pH 6+ pH/°C/mV

Ion 6+ pH/°C/mV/Ion

Technolo

ade

68X576801 Rev 0 07/2011

Table of Contents

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

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

Description of Keypad Functions...............................................................................2

Description of LCD Annunciators ..............................................................................3

Inserting & Removing the Rubber Armor / Stand.......................................................4

Inserting New Batteries.............................................................................................4

Connecting Electrodes and Temperature Sensor......................................................5

Powering the Meter On.............................................................................................5

3. CALIBRATION............................................................................ 6

3.1 pH Calibration....................................................................................................6

pH Calibration Procedure...................................................................................7

Changing the pH Buffer Group...........................................................................8

Resetting User Calibrated Values ......................................................................9

3.2 Ion Calibration (Ion 6+ only).............................................................................10

Ion Calibration Procedure (Ion 6+ only)............................................................10

3.3 Millivolt (mV) Calibration (6+ only)....................................................................12

3.4 Temperature Calibration...................................................................................13

With Temperature Probe (Automatic Temperature Compensation)..................13

Without Temperature Probe (Manual Temperature Compensation).................14

4. MEASUREMENT ...................................................................... 15

Taking Measurements.............................................................................................15

Holding & Releasing a Reading ..............................................................................15

5. TROUBLESHOOTING.............................................................. 16

6. SPECIFICATIONS .................................................................... 17

7. REPLACEMENTS AND ACCESSORIES................................. 18

8. WARRANTY.............................................................................. 20

9. RETURN OF ITEMS.................................................................. 20

Instruction Manual pH 5+, pH 6+, Ion 6+

1. INTRODUCTION

Thank you for selecting our pH 5+, pH 6+, or Ion 6+ portable meter. This

microprocessor-based handheld instrument is both economical and easy to use.

The pH 5+ measures pH and temperature (oC).

The pH 6+ and Ion 6+ measure pH, mV (ORP) and temperature (oC).

The Ion 6+ can also measure direct ion concentration of various ions (mono and

divalent) using an ion selective electrodes (ISE). The mV mode is also useful for ISEs.

The 5+/6+ series meters advance our popular 5/6 series meters that were introduced in

1998.

Each meter includes alkaline “AAA” batteries, a rubber armor / stand, and instruction

manual. Please refer to Section—7 Replacements and Accessories for information

on additional accessories and calibration solutions.

We take great pride in every instrument we manufacture and hope this

one serves you well.

If you are viewing an electronic PDF version of this manual, look for bold and

underlined hyperlinks in the Table of Contents and elsewhere. Clicking on

them will immediately take you to the corresponding location in the manual.

*Find other helpful tips listed in grey boxes like this one!

Instruction Manual pH 5+, pH 6+, Ion 6+

2. GETTING STARTED

Description of Keypad Functions

The pH 5+ and pH 6+ have four keys, while the Ion 6+ has six keys on its splash-proof

keypad as shown here:

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

automatically begins in the measurement mode that was last

used.

MODE: Selects measurement modes (pH, mV, Ion (Ion6+

only), & Temperature).

With meter off, press and hold or to access the 

(buffer),  (calibration), and  (electrode) setup menus

while powering on. Press or again to change setup

menus.

INCREMENT:(INC) for Temperature setting and calibration.

pH 5+ / pH 6+ Ion 6+

Instruction Manual pH 5+, pH 6+, Ion 6+

CALIBRATE: Press to begin calibration of the selected mode.

Press again during calibration to abort calibration and return to

measurement mode without confirming any values.

During setup mode, function is similar to “escape” or “go

back”, returning to the previous screen.

With meter off, press and hold to select the reset menu

() while powering on.

Increase value or scroll up in Setup or Cal modes.

Decrease value or scroll down in Setup or Cal modes.

HOLD: Freezes measured reading—indicated by “HO”. Press

again to resume live reading.

ENTER: Confirms values in calibration mode. Confirms

selections in setup mode.

Description of LCD Annunciators

The custom LCD consists of 3½-digit segments which uses annunciators for pH, mV or

oC (Temperature). No annunciator is shown in Ion mode. Other annunciators include

“HO” (when HOLD function is activated) and “LO” (low battery condition).

Instruction Manual pH 5+, pH 6+, Ion 6+

Inserting & Removing the Rubber Armor / Stand

Before removing the meter from the rubber armor, disconnect any electrodes. Push out

from the bottom edges of meter until it is completely out of boot.

To insert meter into the armor, slide in from the top of meter before pushing the bottom

edges of meter into position. Tilt the stand at the back of meter for table top usage as

desired.

Inserting New Batteries

The “LO” annunciator alerts you when battery power is running low. Power off the meter

before removing the batteries. After removing the rubber armor, push the battery cover

in the direction of the arrow and lift up—no screwdriver is required. Note the polarity of

batteries before inserting into position.

Instruction Manual pH 5+, pH 6+, Ion 6+

Connecting Electrodes and Temperature Sensor

Align the BNC connector slots with the posts of meter’s socket and rotate connector

clockwise until it locks—do not force. To remove, rotate the connector in counter-

clockwise direction until it unlocks, and slide the connector off the socket. Insert the mini

phono jack of temperature sensor into the socket on the meter. Unplug the phono jack

to perform measurements without temperature compensation (25° C default).

2.5 mm Phono plug

for temperature

measurement

BNC connector of

pH, ORP, or Ion

Selective Electrode

Powering the Meter On

Press . All LCD segments will display momentarily during the self-diagnostic test,

before scrolling the model number, software revision, pH buffer group, and number of

pH calibration points selected before returning to the measurement mode:

If a temperature probe is not connected, either 25.0oC (factory default) or the last

calibrated temperature value is used. If a temperature probe is connected, the current

measured temperature is used.

Note: The Ion 6+ will display “ - - - ” in Ion concentration mode if the meter has not been

calibrated or if the meter has been reset. See Section 3—Ion Calibration.

“” (Over range) and “” (Under range) indicates the reading exceeds the maximum

or minimum measurement range. See Section 6—Specifications. However, the most

likely reason for these error messages is that the electrode is not connected or broken.

Instruction Manual pH 5+, pH 6+, Ion 6+

3. CALIBRATION

3.1 pH Calibration

The 5+ and 6+ meter is capable of calibrating up to 5 pH values using the USA or NIST

buffer groups, or 2 pH values using the Low Ionic buffer group. All new calibration

values will automatically override existing calibration data. The non-volatile memory will

retain calibration values upon power shut-off, and battery removal.

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 (i.e. pH 7.00, 6.86, 6.97). For example, if you expect to measure

samples from pH 6.2 to pH 9.5, calibration using 4.01, 7.00, and 10.01 will work well.

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 25 ºC and pH 7.

Always rinse electrodes with clean water before and after each calibration or

sample measurement to avoid cross-contamination.

The following calibration standards are automatically recognized;

Buffer Group Available pH Calibration Values

USA ()1.68, 4.01, 7.00*, 10.01, 12.45

NIST ()1.68, 4.01, 6.86*, 9.18, 12.45

Pb ()4.10, 6.97

*These are the only values suitable for a one-point calibration

See Section 3.1—Changing the pH Buffer Group to select a different buffer group.

Always use fresh pH buffer solutions for calibration. Do not reuse buffer solutions as

they change with prolonged exposure to air (especially pH 10 buffer) resulting in

decreased measurement accuracy. Promptly seal containers and store solutions in a

dark, dry, cool environment.

Instruction Manual pH 5+, pH 6+, Ion 6+

pH Calibration Procedure

1. Turn on the meter and select pH mode by pressing if necessary.

2. Press to begin pH calibration mode. “” (calibrate) will display briefly. Notice

that the pH reading and “pH” annunciator will both blink.

3. Pour pH buffer calibration standard solution into a clean, dry container and dip your

pH electrode and temperature probe in the solution. Swirl gently or stir and wait for

reading to stabilize (approx. 30 seconds depending on your electrode condition).

4. When the pH reading has stabilized, the pH annunciator will stop blinking. Press

to confirm the value. “” (confirm) will display briefly. The pH value is

automatically adjusted to the buffer value shown from your selected buffer group.

The example below shows a successful pH 7.00 calibration at 25 °C.

5. For a one-point calibration with pH 7.00 or pH 6.86 only, press to return to

measurement mode. However for highest accuracy—perform a multiple-point

calibration. Repeat steps 3 & 4 with additional pH buffer calibration standards.

When you have completed the preset number of calibration points, the meter will

automatically save the calibration, cease blinking, and begin pH measurement.

Q: My meter, electrode & buffers are new—why does my pH 10 buffer read “10.06”?

A: Temperature influences pH. While pH 10 buffer is 10.00 at 25 °C / 77 °F, at

20 °C / 68 °F it is actually 10.06! This is why it is always best to record the temperature

as well as the pH reading!

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