BAT402 - Uncategorized Mercury - Free user manual and instructions

Product Type	Digital Thermometer / Hygrometer
Brand	Mercury
Model	BAT402
Dimensions	10.5 x 5.2 x 1.8 cm
Weight	85 g (including batteries)
Power Supply	2 x AAA batteries (1.5 V)
Display	LCD screen, 4-digit
Temperature Range	-10°C to 50°C (14°F to 122°F)
Humidity Range	20% to 95% RH
Accuracy (Temperature)	±1°C
Accuracy (Humidity)	±5% RH
Functions	Temperature & Humidity Display, Min/Max Memory, Comfort Indicator
Mounting	Table stand or wall mount
Material	ABS plastic
Cleaning	Wipe with a soft, dry cloth. Do not use abrasive cleaners.
Safety Precautions	Do not immerse in water. Keep away from direct sunlight and heat sources.
Spare Parts / Repairability	Replaceable batteries (standard AAA). No user-serviceable parts inside.
Battery Life	Approximately 12 months with normal use
Operating Temperature	0°C to 40°C (32°F to 104°F)

Frequently Asked Questions - BAT402 Mercury

How do I install the batteries?

Open the battery compartment on the back of the device. Insert 2 AAA batteries following the polarity markings (+ and -). Close the compartment securely.

How do I switch between Celsius and Fahrenheit?

Press and hold the °C/°F button (if available) for 3 seconds to toggle between temperature units. If your model does not have this button, refer to the manual.

What does the comfort indicator mean?

The comfort indicator shows a smiley face or icon when temperature and humidity are within a comfortable range (typically 20-25°C and 40-60% RH). An unhappy face indicates uncomfortable conditions.

How do I reset the min/max memory?

Press the MIN/MAX button to view stored values. To clear memory, press and hold the same button for about 3 seconds until the values reset to current readings.

Can I place the device outdoors?

This device is designed for indoor use only. It is not waterproof or weatherproof. Exposure to rain or extreme temperatures may damage it.

Why is the display showing 'LLL' or 'HHH'?

'LLL' indicates the temperature is below the measurement range (-10°C), and 'HHH' indicates it is above 50°C. Move the device to an environment within its specified range.

How do I mount the device on a wall?

Use the wall mount hole on the back of the device. Insert a suitable screw or nail into the wall and hang the device securely. Ensure it is level.

Can I replace the batteries with rechargeable ones?

Yes, you can use Ni-MH rechargeable AAA batteries. Note that the battery indicator may not show accurate status with rechargeables.

How do I clean the device?

Use a soft, dry cloth to wipe the exterior. If necessary, slightly dampen the cloth with water. Do not use solvents or abrasive cleaners.

What do I do if the device is not responding?

Try removing the batteries and reinserting them after 10 seconds. If the problem persists, replace the batteries with new ones. Contact Mercury support if needed.

USER MANUAL BAT402 Mercury

Universal Battery Tester

A multi-purpose battery condition checker with an LCD display to indicate status of relevant battery.

This product is suitable for batteries; AA, AAA, C, D, 9V PP3 batteries, 1.5V and 3V button cells.

Can also test digital camera batteries; CR123A, CR2, CR-V3, 2CR5 and CR-P2.

The dimensions are 118 x 88 x 23mm.

All buttons and slots are clearly marked to indicate the location of the battery.

Before checking the condition of the battery ensure you know the size so that you can easily locate which button/slot you need.

Please ensure you observe the correct polarity when inserting the battery.

How do you turn the tester on?

1. Open the battery compartment by sliding the cover forward (see Fig1)

2. Once open, remove the cardboard insulator (see Fig2) from the compartment from the bottom of the battery.

3. For the LCD display to give a status there must be a relevant battery being measured in the tester (see Fig3)

Interior view of a Mercury D�� with battery modules and a digital display (no visible text or symbols)

What readings does the tester give you?

1. Good.
2. Weak.
3. Poor.