Apera Instruments Premium ORP5 User manual

ORP5 Premium Pocket ORP Tester

APERA INSTRUMENTS (Europe) GmbH

www.aperainst.de

v3.1

1 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 battery 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.

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 toenter parameter

setting.

3. In measurement mode, short press to turn on

backlight.

1. In calibration mode, press to change calibration

value (unidirectional)

2. In mode setting, short press to change parameter

(unidirectional)

1. Long press to enter calibration mode.

2. In calibration mode, short press to con- firm

calibration.

3. When measured value is locked, short press to

unlock.

3 Complete kit

4 Preparation Before Use

1) Pour certain amount of Storage solution (KCl) into the probe cap, soak the probe for 3 to 5

minutes to activate the sensor (if frequently used, there is no need to soak).

2) The soaking solution is 3M KCl solution, which comes with the test kit. Users can also make

it by themselves by dissolving 25g KCl in 100 ml distilledwater.

5 ORP Calibration

1) Clean electrode in distilled water and dryit.

2) Pour certain amount of 222 mV ORP standard buffer solution into the calibration bottles

(about half volume of the bottle).

3) Short press to turn the meter on. Long press to enter calibration

mode. If you need to exit calibration mode,short press

4) Dip electrode in the standard buffer solution, stir gently, and allow it to stand

still in the calibration solution until astable reading is reached. When stable

icon comes up, press to adjust the calibration value according to

the table below(also on the buffer bottle’s label).

222 mV (25˚C) ORP Standard Buffer Solution Calibration Reference Table

Temperature (˚C)

242

235

227

222

215

209

205

201

For example, if the temperature is around 25˚C, then adjust the calibration value to 222 mV. If the

temperature is around 20˚C, then adjust the calibration value to 227 mV.

press to complete the calibration.

6 ORP Measurement

Press to power on, clean the probe in distilled water and dry it. And place the probe in the

tested solution and stir gently and let it stand still. Read the measurement after comes up and

stays.

7 Notes

1) Usually there’s no need to calibrate for ORP testing. When used for a long time, users can test

it in 222 mV ORP standard buffer. If the error is big, please calibrate according to the steps in

5.1 to 5.4.

2) The meter has self-diagnosis function. Please refer to the followed chart for detailed

information.

Symbol

Self-Diagnosis information

How to fix

is pressed before the

measurement becomes stable (smiley

face comes up)

Wait till the smile icon appears and

stays, then short press

8 The cleaning and activation of ORP probes

After long-time use, the surface of the platinum sensor can be contaminated and cause inaccuracy

and slow response time. If that happened, the followed methods can be adopted to clean and

activate:

a) For contamination caused by inorganic substances, dip the probe into 0.1 mol/L dilute

hydrochloric acid for 30 minutes. Clean it with distilled water, soak it into the KCL storage

solution for 6 hours, and then it will be ready for use again.

b) For contamination caused by organic substances and oiliness, clean the platinum surface with

dishwashing liquid, and wash with distilled water. And then the probe will be ready for use again

after 6 hours’ soaking in the storage solution.

c) If the platinum surface is so severely contaminated that there forms an oxide film, toothpaste

can be used to clean the platinum surface, and then wash it with distilled water. The probe will

be ready for use again after 6 hours’ soaking in the storage solution.

9 Parameter Setting

9.1 Setting chart

Symbol

Parameter Setting Contents

Code

Factory Default

Low value measurement alarm

-1000 to 1000 mV

-1000

High value measurement alarm

-1000 to 1000 mV

1000

Select automatic lock

Off –On

Off

Select backlight

Off - 1 - On

1 (1 min auto off)

Select temperature unit

˚C - ˚F

˚C

Restore to Factory Default

No –Yes

9.2 Parameter setting instruction

When turned off, long press to enter parameter setting mode; Press to switch from P1-

P2-…P6. Press , the parameter flashes; Press to choose parameter Press to

confirm; Long press to power off.

A) High-Low Measurement Heads-Up Examples (P1 andP2)

Heads-Up when measured value ≤120 mV:

Preset low value = 120 mV, highest value = 1000 mV, when measured value ≤120 mV (stable

icon displays on LCD); Red back-lit heads-up displays.

Heads-Up when measured value ≥ 150 mV:

Preset high value = 150 mV, lowest value = -1000 mV, when measured value ≥150 mV

(stable icon displays on LCD); Red back-lit heads-up displays.

Heads-Up when measured value in range of 120 mV and 150 mV:

Preset low value = 120 mV, highest value = 150 mV, when the measured value <120mV or

>150mV (stable icon displays on LCD); Red back-lit heads-up displays.

B) Automatic lock (P3):

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. Press key to cancel autohold.

C) Backlight (P4)

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

D) Temperature Unit (P5)

Select C˚ or F˚, the factory default is ˚C.

E) Factory default setting (P6)

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

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

instrument does not work well in calibration or measurement. Calibrate and measure again

after recover the instrument to factory default status.

10 Technical Specifications

ORP

(mV)

Measuring Range

±1000 mV

Resolution

1 mV

Accuracy

±0.2% F.S

Temp.

Measurement Range

0 –50 ˚C

Resolution

0.1 ˚C

Accuracy

±0.5 ˚C

11 Tester functions:

•Calibration pointsindication:

•Stable measurement:

•Reading value auto. hold:HOLD

•Self-Diagnostic Information: Er2

•Low-Voltage warning: flickering, reminder of battery replacement

•Three-color backlight:

•Blue—Measurement Mode; Green—Calibration Mode; Red color—Alarm

•Auto. Power-Off in 8 minutes withoutoperation

12 Electrode Replacement

Twist off the probe ring, unplug the probe, plug in new probe (pay attention to the electrode’s

position), and screw on the probe ring.

The compatible model of replacement probe is ORP5-E / ORP60-E.

13 Warranty

We warrant this instrument to be free from defects in material and workmanship and agree to

repair or replace free of charge, at option of APERA INSTRUMENTS (Europe) GmbH, any

malfunctioned or damaged product attributable to responsibility of APERA INSTRUMENTS

(Europe) GmbH for a period of TWO YEARS (SIX MONTHS for the probe) from the delivery.

This limited warranty does NOT cover any damages due to:

Transportation, storage, improper use, failure to follow the product instructions or to perform any

preventive maintenance, modifications, combination or use with any products, materials,

processes, systems or other matter not provided or authorized in writing by us, unauthorized

repair, normal wear and tear, or external causes such as accidents, abuse, or other actions or

events beyond our reasonable control.

APERA INSTRUMENTS (Europe) GmbH

Wilhelm-Muthmann-Straße 18, 42329 Wuppertal, Germany

www.aperainst.de | Contact: [email protected] | Tel. +49 202 51988998

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