Apera Instruments Premium Series User manual

Premium Series PH5S Spear pH Tester

User Manual

APERA INSTRUMENTS (Europe) GmbH

www.aperainst.de

v7.7

Thank you for purchasing Apera Instruments PH5S Premium Spear pH Tester. Please read this

manual before use inordertoproperlyuseandmaintaintheproduct.

For video tutorials, please go to support.aperainst.de

Table of Contents

1What’s in the Kit.......................................................................................................................3

2Keypad Functions....................................................................................................................3

3Preparation Before Use...........................................................................................................4

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

5pH Measurement......................................................................................................................5

6Probe Cleaning ........................................................................................................................5

7Probe Storage..........................................................................................................................6

8Parameter Setting....................................................................................................................6

9ORP Measurement...................................................................................................................7

10 TechnicalSpecifications .........................................................................................................7

11 Other Specifications................................................................................................................8

12 Probe Replacement .................................................................................................................8

13 Notes ........................................................................................................................................9

14 Battery Installation ..................................................................................................................9

15 Troubleshooting Guide .........................................................................................................10

16 Warranty.................................................................................................................................12

ATTENTION

Never use the product when it’s freezing cold. Let it warm to room temperature before using.

1 What’s in the Kit

2 Keypad Functions

Short press: < 2 seconds

Long press: > 2 seconds

1. Short press to turn on the tester and long press to turn

off the tester.

2. When turned off, long press to enter parameter

setting.

3. In measurement mode, short press to turn on

backlight.

4. In calibration mode, short press to cancel calibration.

1. In measurement mode, short press to switch

between pH and mV.

2. In settings, short press to change parameters

(Unidirectional).

1. Long press to enter calibration mode;

2. In calibration mode, short press to confirm

calibration;

3. When reading is locked, short press to unlock.

Probe cap

Swiss spear

pH probe

Probe ring

Battery cap

Calibration Vials

PH60S Tester

3 Preparation Before Use

3.1 Pull out the battery insulation slip, and take off the probe cap.

3.2 Rinse off the probe in pure water (preferably distilled or deionized

water. RO water or tap water is the alternative), then shake off

excess water (see graph on the right).

3.3 Perform at least a 2-point calibration. For tutorial, refer to Section

3.4 When you are not using the tester, always store the spear probe

in the 3M KCL soaking solution. Never let it dry out. Replace the

soaking solution if it gets contaminated.

4 pH Calibration

4.1 How to Calibrate

4.1.1 Short press to power on.

4.1.2 Pour pH buffer solutions in the correspondent calibration vials to about half volume.

4.1.3 Rinse the probe in pure water; Shake off excess water. Dip the probe in the pH 7.00 buffer

solution first, and make a quick stir in the solution, then hold still.

4.1.4 Long press to enter calibration mode, screen will turn green (Short press if you

decide to quit calibration and return to measurement mode).

4.1.5 Wait for the reading to stabilize (when stays on the screen),

then short press to start the 1st point calibration. After calibration

is completed, the tester will return to measurement mode.Icon

will appear at the bottom left of the screen, indicating a successful 1-

point calibration (middle point).

4.1.6 To calibrate 2nd point, use 4.00 pH buffer and repeat Step 4.1.3 to 4.1.5 (Do NOT turn off the

tester after you finish pH 7 calibration). will display next to , indicating a successful

2-point calibration (low and middle points).

4.1.7 If necessary (target pH>8.00), calibrate 3rd point using 10.01 standard pH buffer and repeat

Step 4.1.3 to 4.1.5, will show up next to and , indicating a successful 3-point

calibration (high, low, and middle points).

4.2 Notes about Calibration

a) The 1st point calibration must be 7.00 pH. Perform the 2nd and 3rd point calibrations (4.00,

10.01, 1.68, or 12.45) immediately after the 1st point calibration is finished. Do NOT turn off

the meter before you calibrate 2nd or 3rd point. Otherwise, you will need to restart the

calibration process with 7.00 pH first.

b) The pH 4.00 and 7.00 buffer solutions poured into the calibration vials can be used for up to 10

times as long as they are not contaminated, and the bottles are capped when not in use. pH

10.01 can only be used for up to 5 times as it will lose its accuracy much faster. After that,

replace the buffer solutions in the calibration vials with new ones to keep the accuracy. Keeping

the freshness and cleanliness of calibration buffers is essential for accurate pH measurement.

c) The tester can perform 1 to 3 points of automatic calibration and can recognize 5 types of pH

standard solutions. For details, please refer to the following table:

Calibration

USA Series

NIST Series

Indication icon

Recommended

1-pt

7.00 pH

6.86 pH

Accuracy

requirement ≥ 0.1

2-pt

Option

1st pt: 7.00 pH

2nd pt: 4.00 pH or

1.68 pH

Option

1st pt: 6.86 pH

2nd pt: 4.01 pH

or 1.68 pH

Range < 7.00 pH

Option

1st pt: 7.00 pH

2nd pt: 10.01 pH

or 12.45 pH

Option

1st pt: 6.86 pH

2nd pt: 9.18 pH

or 12.45 pH

Range > 7.00 pH

3-pt

1st pt: 7.00 pH

2nd pt: 4.00 or 1.68 pH

3rd pt: 10.01 or 12.45 pH

1st pt: 6.86 pH

2nd pt: 4.01 or 1.68 pH

3rd pt: 9.18 or 12.45 pH

Range: 0 to 14.00

5 pH Measurement

5.1 PH60S Spear pH tester is designed for direct spear test of solid and semi-solid samplings

such as cheese, fruit, sushi rice, meat, dough. It also works well in general water solutions.

5.2 When performing spear tests in solid samples, pay attention to insert probe evenly, and be

careful to prevent probe from damage. If the medium is too hard, please bore a small hole

with a clean knife before inserting the spear probe.

5.3 For food pH measurement (e.g. sushi, cheese, meat, fruit, etc.), it should always be a

sampling test. That means test samples should no longer be edible.

5.4 How to take pH measurements

5.5 Short press to power on the tester. Rinse the probe in pure water, shake off excess

water. Dip the probe in your sample solution or solid samplings, then hold still. Record the

reading after it is fully stabilized ( appears and stays on the screen).

5.6 Pure Water pH Measurement

5.7 When testing pure water like tap water, drinking water, RO water or distilled water, it will take

longer for the readings to get fully stabilized (typically 1-5 minutes). Please be patient. If still

not working, add Apera 3M KCL (AI1107) to your pure water at the ratio of 1:1000 (e.g. 1 ml

KCL to 1000 ml water) to accelerate stabilization while minimizing pH change. If the accuracy

is not meeting your requirement, please contact us at info@aperainst.de to find the

specialized meter designed for pure water pH test.

6 Probe Cleaning

6.1 The tester is only as accurate as the probe is clean. Always thoroughly rinse off the probe

before and after each measurement with pure water in a container or with a wash bottle.

6.2 For tough contaminants, detach the sensor shield, soak the probe in Apera probe cleaning

solution (AI1166) or detergent water for 30 minutes. Then use a soft brush to remove the

contaminants. Afterwards, soak the probe in 3M KCL soaking solution for at least 1 hour.

Rinse it off, then re-calibrate the tester before using again.

7 Probe Storage

7.1 Always store the spear probe in the 3M KCL soaking solution when not in use. Never let it dry

out. Replace the soaking solution if it gets contaminated.

7.2 NEVER store the probe in pure water like tap, RO, distilled, or deionized water as they could

damage the pH probe. Pure water is only for rinsing the probe.

8 Parameter Setting

8.1 Setup Menu

Symbol

Contents

Parameter

Factory Default

Select pH buffer solution

USA –NIST

USA

Low value measurement alarm setting

0 to 14.00 pH

High value measurement alarm setting

0 to 14.00 pH

14.00

Select automatic lock

Off –On

Off

Select backlight

Off –1 –On

Select temperature unit

°C –°F

°F

Restore to factory default

No –Yes

8.2 Parameter Setup

When turned off, long press to enter parameter settings →Short press to switch P1-P2-

P3…P7 →Short press toselect parameter (selected parameter starts flickering) →Short press

to change parameter →Short press to confirm the change →Long press to go back

to measurement mode.

8.3 Parameter Setting Instruction

8.3.1 Select standard pH buffer solution (P1):

8.3.2 There are two options of standard buffer solutions: USA series and NIST series. Factory

default is USA series, for details see section 4.2.

8.3.3 Alarm Function (P2&P3)

Examples:

■Alarm triggered when measurement ≤3.20 pH:

Preset lowest value (P2) = 3.20 pH, highest value (P3) = 14.00 pH, when measured value ≤ 3.20

pH (stable displays on screen); screen turns red.

■Alarm triggered when measurement ≥8.60 pH:

Preset highest value (P3) = 8.60 pH, lowest value (P2) = 0.00 pH, when measured value ≥ 8.60 pH

(stable displays on screen); screen turns red.

■Alarm triggered when measurement ≤3.20 pH or ≥ 8.60 pH

Preset lowest value (P2) = 3.20 pH, highest value (P3) = 8.60 pH, when measured value is lower

than 3.20 pH or higher than 8.60 pH (stable displays on screen), screen turns red.

8.3.4 Automatic Lock (P4)

Select “On” to activate auto lock function. When reading is stable for more than 10 seconds, the

tester will lock the value automatically, and HOLD icon will display on LCD. Short press key

again to cancel the lock.

8.3.5 Backlight (P5)

“Off”-turn off backlight, “On”-always turn on backlight, “1”- backlight will last for 1 minute.

8.3.6 Temperature Unit (P6)

Select between C˚ and F˚.

8.3.7 Factory default setting (P7)

Select “Yes” to recover instrument calibration to the theoretical value (pH value in zero potential is

7.00pH, slope is 100%), parameter setting return to initial value. This function can be used when

instrument does not work properly in calibration or measurement. Calibrateand measure again after

recovering the instrument to factory default status.

9 ORP Measurement

ORP stands for Oxidation-Reduction Potential. ORP is a measure of the cleanliness of the water &

its ability to break down contaminants. An ORP probe is needed to test ORP (sold separately, SKU:

AI1207).After powering on the tester, press to enter ORP mode (mV). Rinse the probe in pure

water and dry it. Dip the probe in your sample solution, make a quick stir, and hold still. Record the

reading after it is fully stabilized.

10 Technical Specifications

Measuring Range

-2.00 –16.00 pH

Resolution

0.01 pH

Accuracy

±0.01 pH ±1 digit

Calibration Points

1 –3 points

Automatic Temperature Compensation (ATC)

0 –50˚C (32 –122˚F)

ORP

(mV)

Measuring Range

± 1000 mV

Resolution

1 mV

Accuracy

±0.2% F.S

Temp.

Measuring Range

0 –50˚C (32 –122˚F)

Resolution

0.1˚C

Accuracy

±0.5˚C

11 Other Specifications

Screen

3-color LCD screen,

Blue: Measurement; Green: Calibration; Red: Alarm

Reading Lock

HOLD

Low-Voltage Warning

flashing, reminder of battery replacement needed

Auto. Power-Off

In 8 minutes without operation

Waterproof Rating

IP67

Power

DC3V, AAA alkaline batteries×4

Battery Life

Operation up to 2000 hours

Dimension & Weight

Tester: 40×40×178mm/133g; Case: 255×210×50mm/700g;

12 Probe Replacement

12.1 Every pH probe gradually loses its sensitivity and will eventually fail. A typical service life of a

pH probe is 1-2 years depending on many factors such as frequency of use, nature of test

samples, and how well it is maintained, etc. Apera Instruments recommends replacing the pH

probe every 1 to 2 years to guarantee the optimal performance.

12.2 To replace a probe: 1) Take off the probe cap; 2) Screw off the

probe ring 3) Unplug the probe; 4) Plug in the new replacement

probe (pay attention to the probe’s position); 5) Screw on the

probe ring tightly. Soak the probe in 3M KCL for 5-15 minutes.

Then perform calibration before testing.

12.3 The replacement probes compatible with PH5S:

•AI1205 PH60S-E (Spear pH probe for soft-solids pH testing)

•AI1203 PH60F-E (Flat pH probe for surface pH testing)

•AI1201 PH60-E (Regular pH glass bulb probe for general water solutions)

•AI1207 ORP60-E (ORP probe)

13 Notes

a) Avoid testing in very high (>113°F) or very low (<41°F) temperature solutions as it will cause

greater measurement error and potential damage to the probe. Test your samples and perform

calibration close to room temperature as much as possible.

b) Never use your finger to touch the glass membrane or use other material to rub it. Doing so

could generate static electricity and cause measurement errors. Never test oily liquids.

c) Make sure the battery cap is completely closed with the red O-ring. Otherwise, the waterproof

rating could be compromised.

14 Battery Installation

Please install batteries according to the following steps. *Please note direction of batteries:

All POSITIVE SIDES (“+”) FACING UP. (Wrong installation of batteries will cause

damage to the tester and potential hazards)

①Pull the tester’s cap up

②Slide the battery cap along to the direction of arrow

③Open the battery cap

④Insert the batteries (ALL POSITIVE SIDES FACING UP) (see graph)

⑤Close the battery cap

⑥Slide and lock the battery cap along to the direction of arrow

⑦Fit the tester’s cap while making sure to push all the way down. The tester’s waterproof design

may be compromised if the cap is not fitted correctly.

Troubleshooting Guide

Trouble

Reason

How to fix

Cannot calibrate

Pressing too soon

(showing )

Wait for to stay on screen before pressing

Incorrect standard

solutions

(showing )

Reboot tester, calibrate pH 7 first, then pH 4. For

details refer to Section 4.2 (a).

Poor quality standard

solutions

(showing )

Replace with fresh and clean standard calibration

solutions made by legitimate scientific instrument

manufacturers.

Contaminated probe

(showing )

Use a soft brush to clean the probe with Apera

probe cleaning solution or detergent water.

Aged probe

(showing )

Replace the probe.

Dried-out probe

(showing )

Soak the probe in Apera 3M KCL solution for at

least 30 minutes.

Probe is not fully

submerged

(showing )

Make sure the probe is fully immersed in the

solution at least 1 inch.

Air bubbles around the

sensor shield

(showing )

Make a quick stir in the solution to remove air

bubbles.

Reading is always

slowly changing,

won’t stabilize

Contaminated probe

Use a soft brush to clean the probe with Apera

probe cleaning solution or detergent water.

Clogged junction

Use a soft brush to clean the probe with Apera

probe cleaning solution or detergent water, then

soak it in Apera 3M KCL soaking solution

overnight.

Aged probe

Replace the probe.

Testing pure water pH like

tap/drinking/RO/distilled

water

Be patient, wait for 1-5 minutes to reach a fully

stabilized reading. If still not stabilizing, add Apera

3M KCL solution to test water at 1:1000 ratio.

Display similar

readings in any

solutions or

always display 7.0

Broken probe

If you don’t find any visible damage of the probe,

damage, replace the probe.

Instrument defect

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