UT332+ - Mètre Uni-T - Free user manual and instructions

Type de produit	Digital Multimeter
Marque	Uni-T
Modèle	UT332+
Dimensions (approx.)	180 x 80 x 50 mm
Poids (approx.)	300 g
Alimentation	9V battery (6F22)
Afficheur	LCD, 6000 counts
Tension AC	600V
Tension DC	600V
Courant AC	10A
Courant DC	10A
Résistance	60 MΩ
Capacité	60 mF
Fréquence	10 MHz
Test diode et continuité	Oui
Sécurité	CAT II 600V
Fonction Data Hold	Oui
Rétroéclairage	Oui
Entretien et nettoyage	Essuyer avec un chiffon doux et sec; ne pas utiliser de solvants
Pièces détachées et réparabilité	Piles et fusibles remplaçables; contacter le service client pour autres réparations

Frequently Asked Questions - UT332+ Uni-T

How do I replace the battery in the UT332+?

Turn off the meter, remove the screw on the back cover, lift the cover, and replace the 9V battery with a new one (6F22). Ensure correct polarity.

What does the Data Hold function do?

Press the DATA H button to freeze the current reading on the display, useful for capturing values in difficult positions.

How do I measure AC voltage?

Set the rotary switch to the V~ position. Connect the test leads: black to COM, red to VΩmA. Touch the probes to the circuit and read the display.

What is the maximum voltage the UT332+ can measure?

The UT332+ can measure up to 600V AC and 600V DC safely.

Does the UT332+ have a continuity test?

Yes. Set the rotary switch to the continuity/diode position (often marked with a sound wave symbol). A beep indicates continuity if resistance is low.

How can I clean the multimeter?

Use a soft, dry cloth to wipe the casing. Do not use any solvents or abrasive cleaners. Keep the input jacks clean.

What safety category does the UT332+ comply with?

It complies with CAT II 600V, suitable for measuring circuits directly connected to the mains.

How do I measure resistance?

Set the rotary switch to the Ω position. Connect the test leads across the resistor. Ensure the circuit is de-energized for accurate readings.

Why does the display show 'OL'?

'OL' means Overload. The measured value exceeds the range for the selected function. Switch to a higher range if available.

Can I measure current without breaking the circuit?

No, the UT332+ is a standard multimeter and requires the circuit to be opened to insert the test leads in series. For non-contact current measurement, consider a clamp meter.

USER MANUAL UT332+ Uni-T

UT331+/UT332+ Digital Temperature Humidity Meters

Overview

UT330+ series temperature humidity meters (hereafter referred to as "Meters") adopts high precision sensor and super-low power consumption microprocessor in its design, featuring high accuracy, manual and auto-storage, USB data transfer, USB power supply, backlight alarm, real-time display, low power consumption, etc. These Meters can be used in factories, laboratories, research institutes, food and health, environmental protection and other fields.

Unpacking Inspection

Operating Manual 1 piece Battery 4 pieces USB Data Cable 1 piece

Safety Information

Warning

A warning identifies conditions and actions that pose hazards to the user to avoid electrical shock or personal injury, follow these guidelines:

- Inspect the case before using Meters. Do not use Meters if it appears damaged. Look for cracks or missing plastic. Pay particular attention to the insulation around the connectors.

- Replace the batteries as soon as the battery indicator "☐" appears.

- Do not use Meters if it operates abnormally. Protection may be impaired. When in doubt, have Meters serviced.

- Donot operate Meters around explosive gas, vapor, or dust.

- When servicing Meters, use only specified replacement parts.

- Do not use Meters with any part of the case or cover removed.

- Do not clean the sensor with water. Turn to dose the protective sensor cover when not in use. To avoid damage to the device, please use with care.

● Never charge the battery.

- Use the approved alkaline battery (AAA 1.5V) only.

- Pay attention to "+" and "-" marks when installing the batteries.

- Close the sensor cover and remove the batteries if Meters is not used for a long time.

Meter Description

Meter Structure (See Figure 1)

No.	Description
1	Protective cover of sensor (burn to open or dose)
2	Display screen
3	Power on/off
4	Press to display Max/Min value among current readings. Long press to exit the function (also used as ▲ button).

No.	Description	No.	Description
1	HI: Upper limit, LO: Lower limit	10	Auto power off
2	Dew-point temperature	11	Low battery/USB power supply
3	Wet-bulb temperature	12	Alarm
4	Storage group number	13	Humidity icon
5	Maximum value	14	Temperature icon
6	Minimum value	15	Celsius unit
7	Humidity display zone	16	Temperature display zone
8	Data hold	17	Fahrenheit unit
9	Humidity unit	18	Time display zone

Setting Meters

- SETUP Options

Short press SETUP button to enter into setting mode, first enter into unit setting page, and then press recyclable to switch the setting state until the setting is storage and exit. On any setting page, the setting mode will exit and be back to measuring page if no any button is pressed for 15 seconds. The cycle sequence:

Measuring state→Temperature unit setup→Time interval setup→Temperature &

Humidity Upper Limit Alarm Setup→Temperature & Humidity Lower Limit Alarm Setup→Sleep time setup→System time setup→Temperature & Humidity Offset setup→Measuring state.

● Performing the Setups

1. Setting Temperature Unit

Short press SETUP to access temperature unit setup mode. press ▼(HOLD)▲(MAX/MIN) to select °C or °F unit.

2. Setting Time Unit

Short press SETUP to switch to time interval mode, "int" shows on LCD. Press ▼▲ to change the interval for automatic data storage. Long press ▼▲ to increase /decrease the time quickly. The interval can be set up to 09:59 and down to 00:00 (auto-data storage disabled at 00:00).

3. Upper-limit temperature & humidity setting

Short press SETUP for 3 times to access upper limit setup mode, "Hi" shows on LCD, short press ENTER/DP to switch upper-limit temperature & humidity, upper-limit dew-point temperature, upper-limit wet-bulb temperature, press ▼▲ to change the value.

4. Lower-limit temperature & humidity setting

Short press SETUP for 4 times to switch to lower limit setup mode, "LO" shows on LCD, short press ENTER/DP to switch following setups: lower-limit temperature & humidity, lower-limit dew-point temperature, lower-limit wet-bulb temperature, press ▼▲to change the value.

- Turn on/off Backlight

Short press backlight button to turn on the backlight, press again to turn it off. Long press backlight button to activate alarm, the alarm icon 🔒 appears, long press backlight button again to inactivate alarm, the alarm icon disappears.

With the alarm function activated, the red backlight will flash every 500ms if Meters alarms due to upper limit, the blue backlight will flash every 500ms if Meters alarms due to lower limit. If Meters alarms due to upper & lower limit, the red/blue backlight will flash every 500ms in turn and the corresponding icon will light up, for example, if Meters alarms due to upper temperature limit, the red backlight, temperature icon and upper icon (HI) will flash at the same time.

• View Max/Min Reading

1. Short press MAX/MIN button to check Maximum reading, minimum reading and normal test value.
2. Long press MAX/MIN to exit the mode.

- View dew-point temperature and wet bulb temperature

Short press ENTER to view dew point temperature, wet bulb temperature and normal temperature. For dew point temperature, “DEW POINT” is displayed on the screen, for wet bulb temperature, “WET BULB” is displayed on the screen.

- Use offset value to adjust Meters error.

Users can compensate the error in temperature & humidity offset setting of SETUP.

- Data Access

Store Data

Manual storage: time interval is set at 00:00, in test page, short press ST ORE to store data manually, Meters flashes and show the storage area. Take LOG 001 as an example, it represents the data is stored at 001. UT331+ can store 299 groups of data, UT332+can store 999 groups of data, the record data is the data shown in the main display screen.

Auto storage: time interval is not set at 00:00, in test page, short press STORE to store data manually, long press STORE to store data automatically, the storage area, i.e. LOG 001, will flash at intervals, Meters will automatically save data in circle at the set interval, the record data is the data shown in the main display screen.

- Recall Data

Short press RECALL to check recorded data, press again to exit.

1. Short press RECALL to check recorded data, the screen displays the storage area, i.e. LOG 001, press ▼▲o scroll through recorded readings, Meters defaults at the reading saved last time you exit the STORE mode.
2. Short pressing ENTER under RECALL mode can quickly review from 01 to 299/999 data and also allow you to transfer data to PC through USB, after quick review, the number stops at 299/999. On data reviewing status, short press RECALL to exit and go back to main display screen.
3. Long press RECALL under RECALL MODE to clear the recorded data, the screen will keep displaying dELE until the data is completely cleared, and then go back to main display screen.

Note: The data will be completely cleared once the function is enabled. Step-by-Step clearing is not allowed. To avoid any data loss, please think it twice before you use the function.

• Transfer Data

Meters will transfer data to PC under following two circumstances:
1. Enter into RECALL status, short pressing ENTER button will not only allow you to review the data quickly but also transfer the data automatically to PC.
2. When PC is running the supplied software and has been already connected to Meters, the measured data will be automatically transferred to PC.

- USB power supply

Connect USB cable to PC USB interface or 5V DC adaptor, Meters will automatically switch to USB power supply. Disconnect the USB cable to switch to battery power supply.

Note: The DC voltage of USB power supply is 5V, voltage over 5V may damage Meters.

USB Communication

1. Please download PC software according to the attached general file, and install step by step.
2. After running the master computer software, connect the USB cable to the computer.
3. Browse and analyze data through the master computer software, for the usage of master computer software, please refer "Software Manual" from the Help Option of Operation Page.

Maintenance

● Replacing the battery (See Figure 3)

When Meters indicates “☐”, please replace the battery timely. Follow the steps as below:

1. Unscrew the battery cover and remove it from Meters.
2. Replace the batteries with new 4×AAA batteries.
3. Rejoin the battery cover and tight up the screw.

- Cleaning the casing

When it becomes necessary to clean the surface of Meters, clean it with soft cloth or sponge dampened with just a little of water, soap water or mild detergent. Prohibit washing Meters with water directly, which may damage the circuits inside.

Technical line drawing of a mechanical device with multiple views (no text or symbols)

Figure 3

Technical Index

Function		UT 331+ UT 332-
	Measurement range	Measurement accuracy	Measurement accuracy
Temperature	-20.0°C~70.0°C	±0.5°C	±0.3°C
Dew point temperature	-78.2°C ~70.0°C	±1°C	±0.8°C
Wet bulb temperature	-21.6°C ~70.0°C	±0.5°C	±0.3°C
Humidity	0~99.9%RH	10%~90%RH, ±3%RH.For others: ±3.5%RH.	10%~80%RH, ±2%RH.For others: ±2.5%RH.
Resolution		Temperature: 0.1°C, Humidity: 0.1%RH
Temperature measurement		Measurement temperature/Dew point temperature/Wet bulb temperature
Manual storage		√
Auto storage		Users can turn on/off auto storage(It defaults at "turn off") and adjust the storage interval 0s~60min.
Storage group number		299 groups	999 groups
Data viewing		View storage data
Unit setting		°C or °F
Alarm setting		Users can turn on/off the alarm (It defaults at "turn off"). Backlight alarm (For upper-limit alarm, the red light flashes every 500ms. For lower-limit alarm, the blue light flashes every 500ms.)
Max./Min. value measurement		√
Data hold		√
Data export		Users can view the real-time data through the software of master computer and export the storage data.
Auto power off		Users can turn on/off the function of auto power off (It defaults at "turn on") and adjust the auto power off time (5min~60min).
Real time		Set the real time of system.
Offset setting		Temperature, dew point temperature, wet bulb temperature, humidity offset value (-6~6).
Backlight		Users can turn it on/off (It defaults at "turn off").
USB power supply		Connect USB and switch to USB power supply, USB voltage is 5V.

EMC Standard: EN61326-1 2013

Reference Standard:

JJG205-2005 Mechanical Hygro-Thermometer

JJF1076-2001 Calibration Specification of Humidity Sensor

UNI-T®

UNI-TREND TECHNOLOGY (CHINA) CO., LTD.

No. 6, Gong Ye Bei 1st Road,

Songshan Lake National High-Tech Industrial

Development Zone, Dongguan City,

Guangdong Province, China