VOLTCRAFT 2574174 OM-100 Oxygen Detector Instruction Manual

: June 13, 2024
: VOLTCRAFT

Table of Contents

Introduction
Intended use
Delivery contents
Latest product information
Description of symbols
Safety instructions
Product overview
Insert / replace battery
Connection
Operation
Sensor element
Cleaning and care
Disposal
Technical data
References
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VOLTCRAFT 2574174 OM-100 Oxygen Detector Instruction Manual

Introduction

Dear customer,
Thank you for purchasing this product.

If there are any technical questions, please contact: www.conrad.com/contact

Intended use

The product is a handheld oxygen meter that uses an electrochemical oxygen sensor. The product can be used to measure ambient or inline oxygen (O2) concentration levels.

Do not use this product to measure dissolved oxygen in water.

Important:
This product should only be used as a general indicator of oxygen concentrations levels.

Never use this product as a safety or emergency stop device, or in applications where failure or inaccurate readings due to its use could cause serious injury, death, or material damage.

Contact with moisture must be avoided under all circumstances.

If you use the product for purposes other than those described, the product may be damaged.

Improper use can result in short circuits, fires, or other hazards.

The product complies with the statutory national and European requirements.

For safety and approval purposes, you must not rebuild and/or modify the product.

Read the operating instructions carefully and store them in a safe place. Make this product available to third parties only together with the operating instructions.

Delivery contents

Product
Sensor element (with: T-piece adaptor, T-piece)
5x spare O-rings
9 V battery
Operating instructions

Latest product information

Download the latest product information at www.conrad.com/downloads or scan the QR code shown. Follow the instructions on the website.

Description of symbols

The symbol warns of hazards that can lead to personal injury.

Safety instructions

Read the operating instructions carefully and especially observe the safety information. If you do not follow the safety instructions and information on proper handling, we assume no liability for any resulting personal injury or damage to property. Such cases will invalidate the warranty/guarantee.

General

The product is not a toy. Keep it out of the reach of children and pets.
Do not leave packaging material lying around carelessly. This may become dangerous playing material for children.
If you have questions which remain unanswered by this information product, contact our technical support service or other technical personnel.
Maintenance, modifications and repairs must only be completed by a technician or an authorised repair centre.

Handling

Handle the product carefully. Jolts, impacts or a fall even from a low height can damage the product.

Operating environment

Do not place the product under any mechanical stress.
Protect the appliance from extreme temperatures, strong jolts, steam and solvents.
Protect the product from high humidity and moisture.
Protect the product from direct sunlight.
Do not switch the product on after it has been taken from a cold to a warm environment. The condensation that forms might destroy the product. Allow the product to reach room temperature before you use it.

Operation

Consult an expert when in doubt about the operation, safety or connection of the product.
If it is no longer possible to operate the product safely, take it out of operation and protect it from any accidental use. DO NOT attempt to repair the product yourself. Safe operation can no longer be guaranteed if the product:
- is visibly damaged,
- is no longer working properly,
- has been stored for extended periods in poor ambient conditions or
- has been subjected to any serious transport-related stresses.

(Rechargeable) Batteries

- Correct polarity must be observed while inserting (rechargeable) batteries.
The (rechargeable) batteries should be removed from the device if it is not used for a long period of time to avoid damage through leaking. Leaking or damaged (rechargeable) batteries might cause acid burns when in contact with skin, therefore use suitable protective gloves to handle corrupted (rechargeable) batteries.
(Rechargeable) batteries must be kept out of reach of children. Do not leave (rechargeable) batteries lying around, as there is risk, that children or pets swallow them.
All (rechargeable) batteries should be replaced at the same time. Mixing old and new (rechargeable) batteries in the device can lead to (rechargeable) battery leakage and device damage.
(Rechargeable) batteries must not be dismantled, short-circuited or thrown into fire. Never recharge non-rechargeable batteries. There is a risk of explosion!

Connected devices

Also observe the safety and operating instructions of any other devices which are connected to the product.

Sensor

Caution Acid! The sensor contains Potassium Hydroxide (KOH), which is corrosive and can cause severe burns to skin and eyes.
If there is contact:
- to skin: flush contacted area with large amounts of water for several minutes.
- to clothing: remove contaminated clothing.
- to eyes: flush with large amounts of water for several minutes, obtain medical treatment.
If ingested:
- give large volumes of water. DO NOT induce vomiting!
- obtain medical treatment.

Product overview

Display
Power / backlight button
O-ring
O-ring
3.5 mm sensor socket
APO (auto power off) button
MODE button
T-piece
T-piece adaptor
Sensor element
Sensor cable
Battery compartment

Insert / replace battery

Replace the battery when the low battery indicator appears on the display.

Release the battery compartment cover screw and open the cover.
Insert a new 9 V block battery into the battery compartment.
Close the battery compartment cover and replace the screw.

Note:
Remove the battery when you do not use the product for longer periods of time to prevent leaking.

Connection

Inline gas measurement configuration

When measuring inline oxygen concentration levels, the sensor element should be configured as shown.
When inserting the T-piece into the adaptor, apply a small amount of distilled water to the O-ring to help reduce friction.

Ambient air measurement configuration

When measuring ambient oxygen concentration levels, remove the T-piece and T-piece adaptor.

Operation

Power ON / OFF

Press the power button to switch the power ON.
Press and hold the power button to switch the power OFF.

Calibration

Important:

For improved accuracy the device must be calibrated at regular intervals in ambient air (approx. 21.0 % O2).
For more accurate results, use the readings taken from a separate calibrated device or measure the oxygen in an environment where the oxygen percentage is known.

Preconditions

The sensor has been kept in a normal oxygen environment (21.0 % O2) for approximately 2 hours.
The power is switched OFF.

Press and hold the MODE button and then short press the power button.
Keeping the MODE button pressed, when APO shows on the display press the APO button.
Release all buttons when CAL appears on the display. The product will be ready for setting when the display changes to show an oxygen percentage (e.g. 21.3 %).
Press the MODE or APO buttons to adjust the values to match the ambient oxygen percentage (e.g., approx. 21.0 %).
Short press the power button to save the setting and switch the product OFF.
Take some measurements and check the results are within range, see section: Measuring oxygen levels [} 28]. Repeat the calibration process if the results are not within range.

Note:
If after multiple attempts you cannot achieve accurate results with a calibrated sensor, you may need to replace the sensor. See section: Replace the sensor element [} 30].

Measuring oxygen levels

Inline oxygen measurement

The product can be used inline e.g. to measure bottled gas.

Important:
Consider the following possible sources of measuring errors:

Bottled gas may be cooler than the ambient air because of pressure loss as it exits the bottle!
Strong air flow can produce an over pressure at the sensor

Preconditions:

The sensor has been configured for inline measurements. See section: Inline oxygen measurement [} 28].
The product has been calibrated. See section: Calibration [} 27].

Press the power button to switch the power ON.
Wait a few moments for the reading to stabilize.
Press and hold the power button to switch the power OFF.

Ambient air oxygen measurement
The product can be used to measure the ambient oxygen concentration levels.

Important:
Consider the following potential causes of measuring errors:

Temperature differences between sensor and gas. Allow some time for the sensor to adjust its temperature to the gas that is measured.
Try to avoid warming the sensor by touching it during measurement or calibration.

Preconditions:

The product has been configured for ambient air measurements. See section: Ambient air measurement configuration [} 26].
The product has been calibrated. See section: Calibration [} 27].

Press the power button to switch the power ON.
Wait a few moments for the reading to stabilize.
Press and hold the power button to switch the power OFF.

Maximum / minimum / average readings

The default mode is an average of all readings, and is active when MAX or MIN is not shown on the display.
Short press the MODE button to toggle through modes.
MAX or MIN will appear on the display to indicate which mode is active.

Hold

Press and hold the MODE button to switch the hold function ON/OFF.
HOLD will appear on the display to indicate this function is active.

Backlight

Press the backlight button to switch the backlight ON/OFF.
The backlight will automatically switch off after a short time.

Auto power off

Press the APO button to switch the auto power off function ON/OFF.
APO will appear on the display to indicate the function is active.

Sensor element

Sensor lifespan

To help increase the sensor lifespan, expose the sensor to normal-humidity ambient air during measurement breaks (e.g., “flush” the system with fresh air).

Some factors that may reduce the sensor lifespan include:

Incorrect operating or storage temperatures. See section: Technical data [} 32].
Continuous usage with dry gases (such as compressed gas). See section: Oxygen sensor [} 33].

Replace the sensor element

Disconnect the sensor cable and any attached parts (e.g., T-piece adaptor).
Attach the new sensor and check the O-rings are in place. See section: Connection [} 26].
Calibrate the product, see section: Calibration [} 27].

Cleaning and care

Important:

Do not use aggressive cleaning agents, rubbing alcohol or other chemical solutions. They damage the housing and can cause the product to malfunction.
Do not immerse the product in water.

Clean the product with a dry, fiber-free cloth

Disposal

Product

This symbol must appear on any electrical and electronic equipment placed on the EU market. This symbol indicates that this device should not be disposed of as unsorted municipal waste at the end of its service life.

Owners of WEEE (Waste from Electrical and Electronic Equipment) shall dispose of it separately from unsorted municipal waste. Spent batteries and accumulators, which are not enclosed by the WEEE, as well as lamps that can be removed from the WEEE in a non-destructive manner, must be removed by end users from the WEEE in a non-destructive manner before it is handed over to a collection point.

Distributors of electrical and electronic equipment are legally obliged to provide free take-back of waste. Conrad provides the following return options free of charge (more details on our website):

in our Conrad offices
at the Conrad collection points
at the collection points of public waste management authorities or the collection points set up by manufacturers or distributors within the meaning of the ElektroG

End users are responsible for deleting personal data from the WEEE to be disposed of. It should be noted that different obligations about the return or recycling of WEEE may apply in countries outside of Germany.

(Rechargeable) batteries

Remove batteries/rechargeable batteries, if any, and dispose of them separately from the product. According to the Battery Directive, end users are legally obliged to return all spent batteries/rechargeable batteries; they must not be disposed of in the normal household waste.

Batteries/rechargeable batteries containing hazardous substances are labelled with this symbol to indicate that disposal in household waste is forbidden. The abbreviations for heavy metals in batteries are: Cd = Cadmium, Hg = Mercury, Pb = Lead (name on (rechargeable) batteries, e.g. below the trash icon on the left).

Used (rechargeable) batteries can be returned to collection points in your municipality, our stores or wherever (rechargeable) batteries are sold. You thus fulfil your statutory obligations and contribute to environmental protection.

Batteries/rechargeable batteries that are disposed of should be protected against short circuit and their exposed terminals should be covered completely with insulating tape before disposal. Even empty batteries/rechargeable batteries can contain residual energy that may cause them to swell, burst, catch fire or explode in the event of a short circuit.

Technical data

Handheld unit

Power supply ………………………. 1x 9 V block battery
Accuracy …………………………….. calibrated device at nominal temp.: ±0.1 % O2 ±1 digit sensor linearity: <2 vol.-% +/- 0.1 % <25 vol.-% +/- 0.5 % <100 vol.-% +/- 1.0 %
Calibration ………………………….. perform calibration at regular intervals, in ambient air (approx. 21.0 % O2) by volume
Measurement ………………………. 0 – 100 % O2 concentration
Resolution …………………………… 0.1 %
Response time (T90) ……………… <15 seconds
Operating pressure ………………. 0.5 – 2.0 bar absolute
Operating conditions …………….. 0 to +50 °C, ≤99 % RH (non-condensing)
Storage conditions ……………….. -10 to +60 °C, ≤99 % RH (non-condensing)
Dimensions (W x H x D) ……….. 30 x 111 x 73 mm
Weight ……………………………….. approx. 192 g (without battery)

Oxygen sensor

Output ………………………………… 9 – 13 mV (21 % O2)
Output connector …………………. 3.5 mm jack
Sensor type ………………………… Partial pressure electrochemical
Measurement range …………….. 0 – 100 % vol. O2
Response time …………………….. (T 90) <15 s
Baseline offset …………………….. <200 μV
Temperature compensation …… <2 % O2 equivalent variation from 0 to +40 °C
External load resistor …………… ≥10 kΩ
Lifetime ………………………………. Long term output drift in 100% O2 : <5 % signal loss/year Operating Life: 1.5 x 106 % O2 hours at 20 °C 0.8 x 106 % O2 hours at 40 °C
Operating pressure range ……… 0.5 – 2.0 bar
Operating conditions …………….. -10 to +30 °C, ≤99 % RH (non-condensing)
Storage conditions ……………….. -10 to +50 °C, ≤99 % RH (non-condensing)
Weight ……………………………….. approx. 38 g

This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com).

All rights including translation reserved. Reproduction by any method (e.g. photocopying, microfilming or the capture in electronic data processing systems) requires prior written approval from the editor. Reprinting, also in part, is prohibited. This publication reflects the technical status at the time of printing.

Copyright by Conrad Electronic SE
*2574174_V2_0823_dh_mh_en 9007200052123659-2 I2/O2

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