Draper 12444 Handleiding

Draper Meetapparatuur 12444

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• Use this product ONLY as instructed in this manual.

• DO NOT attempt to open, dismantle or modify this

product in any way.

• Before every use, inspect the device for missing,

broken, loose or corroded parts and battery leakage.

−DO NOT use this product if it is damaged in any

way; contact Draper Tools to discuss repair and

replacement options.

− If battery acid comes into contact with your skin,

wash it o immediately with plenty of clean water.

− If battery acid comes into contact with your eyes,

ush them with plenty of clean water and seek

immediate medical attention.

• DO NOT expose this product to liquids or wet

environments.

Original Instructions

Version 1 – June 2023

12444

DIGITAL

HYGROMETER

2. Specication

Stock No. 12444

Part No. 180-DH-1

Measurement ranges Range Resolution Accuracy

Relative humidity 0–100%RH 0.1 ±3.0% RH (45–75% RH) / ±4.5% RH (others)

Temperature (°C) -20 to +70°C 0.1 ±1.0°C

Temperature (°F) -4 to +158°F 0.1 ±1.8°F

Dew point temp. As temps. 0.1 ±1.5°C / ±2.7°F*

Wet bulb temp. As temps. 0.1 ±1.5°C / ±2.7°F

Operating time up to 50 hours

Batteries 3 × 1.5V AAA (not supplied)

Permissible ambient conditions Temperature Humidity

Operation -20 to +60°C (-4 to +140°F) 10–90% RH

Storage -20 to +60°C (-4 to +140°F) 10–75% RH

Dimensions W 56 × H 168 × D 30.5mm

Weight (with batteries) 125g

*Accuracy is based on ambient conditions of 25°C, 40–100% RH.

3. Health and Safety Information

Important: Read all the Health and Safety instructions before attempting to use this product.

Read this manual in full before using this product and retain it for future use. Always use the latest version of the manual.

Please visit for the latest version.drapertools.com/manuals

1. Intended Use

This product is a hand-held device designed to measure light levels in a given environment. An indication of ambient

temperature is also given. Any other application beyond the conditions established for use will be considered misuse.

Draper Tools accepts no responsibility for improper use of this product.

Part of our core range, this product is suitable for regular use by enthusiasts and tradespersons alike.

5. Operation

5.1 Installing Batteries

This product requires 3 × 1.5V AAA batteries (not supplied).

To install the batteries, slide the battery compartment

cover (1) down and away from the back of the device and

insert the batteries according to the correct polarity.

5.2 Switching On and Basic Operation

To switch on the device, press the power button (6). The

device performs a diagnostics check during startup before

readings are shown on the display. Stand in the position to

be measured and direct the sensor (7) upwards.

Important: Take several measurements in the location to

ensure that the humidity level remains consistent and that

the reading is accurate.

The device begins measuring humidity levels and

temperature immediately and the readings are indicated on

the display. Readings are updated every 500ms.

To switch o the device, press the power button. This resets

the device.

5.3 Freezing the Display

The current readings can be held on the display by pressing

the hold button (3). The hold data indicator (11) illuminates

to show that the display has been frozen.

Important: While data is held on the display, no other

measurements are taken.

To resume measurements, press the hold button again or

press the mode button (5). The hold data indicator is

hidden and the display updates in real-time.

5.4 Maximum and Minimum Values

The display can be set to show the maximum or minimum

value recorded for both humidity levels and temperature

during an active session.

Press the min/max button to display the maximum value

recorded. Each subsequent press of the min/max button (4)

alternates between the highest and lowest values recorded

since the device was switched on. The max (13) or min (14)

value indicators illuminate as appropriate to identify the

value shown on the display.

Important: While min/max mode is active, no other

measurements are displayed unless they exceed the min or

max reading currently shown on the screen. These new

readings are then locked until they are surpassed by new

data.

To exit min/max display mode, press and hold the min/max

button for three seconds or press the mode button (5).

5.5 Temperature Mode

To change the temperature measurement mode, press the

mode button (5). Each press of the button advances to the

temperature mode:

• Ambient temperature

• Dew point temperature

• Wet bulb temperature

The device may take up to a second to update its display.

Ambient temperature is displayed by default and is

identied by the presence of no temperature mode

indicators. Other modes are identied by the illumination

of the appropriate mode indicator (10) (17).

Important: The large value display is always used for

relative humidity.

5.6 Temperature Units

The unit of the temperature reading can be changed during

startup.

Important: Ensure the correct unit of measurement for

temperature is enabled before capturing meaningful

readings as all readings are lost when the device is

switched o.

While the device is o, press and hold the hold button (3).

Keeping the hold button depressed, also press the power

button (6) to switch on the device. The device will launch

with the other temperature units enabled.

The default unit for temperature measurement is degrees

Celsius.

5.7 Automatic Switch-O

By default, the device is congured to power o

automatically after approximately 15 minutes of inactivity.

If automatic switch-o function is enabled, the auto-o

indicator (8) is illuminated on the device display.

To disable the automatic switch-o function, press and

hold the min/max button (4) while the device is o and,

keeping the min/max button depressed, also press the

power button (7) to switch on the device. The device will

launch with the function disabled.

Important: If automatic switch-o is disabled, this applies

only to the current active session. Automatic switch-o is

automatically enabled the next time that the device is

switched on.

Important: If automatic switch-o is disabled, the device

can only be powered down by pressing the power button.

5.8 Low Battery Warning

An approximate indication of the device battery level is

shown in the corner of the display. When the battery level

indicator (9) is empty, the batteries must be changed.

Important: Low power to the device may aect the

accuracy of the measurements displayed.

6. Maintenance and Disposal

Important: Other than the batteries, this product has no

user-serviceable parts; however, regular product care will

extend the life of the product. Any additional servicing or

repairs MUST be performed by an authorised and qualied

professional.

Important: Remove the batteries from the product before

cleaning.

• Keep the sensor and its housing apertures free from dust

and debris.

• DO NOT allow the sensor to become wet or scratched.

• Keep the buttons free from dust and debris to ensure

that they function eectively when pressed.

• Clean the device with a dry cloth ONLY DO NOT; allow

moisture to enter the device housing.

Important: DO NOT clean this product using abrasives,

solvents or other aggressive substances as they may

damage plastic or insulated parts.

• Have the device recalibrated every 12 months by an

authorised technician.

• Store this product in a cool, clean and dry location, out

of direct sunlight and out of reach of children.

• Remove the battery when storing the device for

extended periods of time.

At the end of its working life, dispose of the product

responsibly and in line with local regulations. Recycle

where possible.

• DO NOT dispose of this product with domestic waste;

most local authorities provide appropriate recycling

facilities.

• DO NOT burn or mutilate batteries; this may release

toxic or corrosive substances.

• Dispose of batteries separately and in accordance with

local regulations.

7. Warranty

Should the tool develop a fault, return the complete tool to

your nearest distributor or contact Draper Tools directly.

Proof of purchase must be provided.

If, upon inspection, it is found that the fault occurring is

due to defective materials or workmanship, repairs will be

carried out free of charge. This warranty covers parts and

labour for 12 months from the date of purchase. However, if

the tools are hired out, the warranty period is 90 days from

the date of purchase.

This warranty does not apply to any consumable parts,

batteries or normal wear and tear, nor does it cover any

damage caused by misuse, careless or unsafe handling,

alterations, accidents, or repairs attempted or made by any

personnel other than the authorised Draper Tools repair

agent.

Visit for full details.drapertools.com/warranty

8. Explanation of Symbols

Read the instruction manual

Warning!

Do not abandon in the environment

Do not incinerate or throw onto re

WEEE – Waste Electrical

& Electronic Equipment

Do not dispose of Waste Electrical & Electronic

Equipment in with domestic rubbish

European conformity

UK Conformity Assessed

Helpline: +44 (0) 23 8049 4344 Sales Desk: +44 (0) 23 8049 4333 General Enquiries: +44 (0) 23 8026 6355 Website: drapertools.com Email: sales@drapertools.com

Draper Tools Limited, Hursley Road, Chandler’s Ford, Eastleigh, Hampshire, SO53 1YF, UK Delta International BV, Oude Graaf 8, 6002 NL, Weert, Netherlands 0723