DVM171THD - Thermometer VELLEMAN - Free user manual and instructions

Product Type	Temperature and humidity data logger with dew point display
Brand	Velleman
Model	DVM171THD
Dimensions (L x W x H)	101 x 25 x 23 mm
Weight (with battery)	172 g
Power Supply	3.6 V lithium battery (type 1/2 R6)
Temperature measurement range	-40°C ~ +70°C (-40°F ~ +158°F)
Temperature accuracy	±1°C (±1.8°F) from -10 to +40°C; ±2°C elsewhere
Relative humidity measurement range	0 % ~ 100 % RH
Relative humidity accuracy	±3.0 % RH from 40 to 60 %; ±3.5 % from 20 to 40 % and 60 to 80 %; ±5.0 % elsewhere
Dew point measurement range	-40°C ~ +70°C (-40°F ~ +158°F)
Dew point accuracy	±2.0°C (±4.0°F) at 25°C, 40-100 % RH
Memory	32,000 measurements (16,000 temperature + 16,000 humidity)
Interface	USB
Configurable measurement cycle	2 s, 5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 30 min, 1 h, 2 h, 3 h, 6 h, 12 h, 24 h
Configurable alarm	Yes, with high and low thresholds for temperature and humidity
LED indication	Green LED (REC) and red/yellow LED (ALM)
Software included	Yes, analysis software on CD-ROM
Operating temperature	-35°C ~ +80°C
Cleaning	With a slightly dampened, lint-free cloth; avoid alcohols and solvents
Safety	Protect against rain and moisture; keep out of reach of children; do not modify the device
Spare parts and repairability	No user-serviceable parts; order from the dealer
Original accessories	Use only original accessories

Frequently Asked Questions - DVM171THD VELLEMAN

How to install the software provided with the DVM171THD?

Insert the CD-ROM into your computer's drive and follow the on-screen installation instructions. The software allows you to configure the logger, download data, and analyze it.

How to configure the logger for the first time?

Remove the protective cap, insert the logger into a free USB port, launch the software, configure the desired parameters (measurement cycle, alarms, etc.) and click 'Setup'. Refer to the software help for more details.

What to do if both LEDs are off?

This may indicate no sampling or a low battery. Enable sampling via the software or replace the 3.6 V lithium battery (1/2 R6).

How to interpret the different LED flashes?

The green REC LED flashes 1x/10s in normal sampling (no alarm), 2x/10s in delayed measurement mode. The red or yellow ALM LED flashes according to the alarm: red 1x/10s for low humidity threshold, 2x/10s for high threshold; yellow 1x/10s for low temperature threshold, 2x/10s for high threshold; flashing 1x/60s for low battery or full memory.

How to replace the battery of the DVM171THD?

Disconnect the logger from the computer. Open the battery compartment using a small screwdriver, slide the logger out of the housing, remove the old battery and insert a new 3.6 V lithium battery respecting polarity. Replace the logger in its housing and reconfigure it via the software.

How to calibrate the sensor?

Warm the logger to +80°C with humidity <5% for 36 hours, then store it at room temperature (20-30°C) with humidity >74% for 48 hours. This restores the internal sensor calibration.

What are the measurement accuracies of the DVM171THD?

Temperature accuracy: ±1°C from -10 to +40°C, ±2°C elsewhere. Humidity accuracy: ±3% RH from 40 to 60%, ±3.5% from 20 to 40% and 60 to 80%, ±5% elsewhere. Dew point accuracy: ±2°C at 25°C for 40-100% RH.

How to clean the logger?

Use a slightly dampened, lint-free cloth. Avoid alcohol and solvents. Do not touch the USB connection with fingers. Never immerse the device in liquid.

What is the battery life?

Battery life depends on the measurement cycle and usage. A longer cycle (e.g., 1 h) extends battery life. When the battery is low, the ALM LED flashes 1x/60s. Replace the battery as soon as necessary.

How to download recorded data to the computer?

Launch the software, remove the protective cap, connect the logger to a free USB port, then use the software's download function. Refer to the software help for more information on data processing.

USER MANUAL DVM171THD VELLEMAN

To all residents of the European Union Important environmental information about this product

This symbol on the device or the package indicates that disposal of the device after its lifecycle could harm the environment.

Do not dispose of the unit (or batteries) as unsorted municipal waste; it should be taken to a specialized company for recycling.

This device should be returned to your distributor or to a local recycling service. Respect the local environmental rules.

If in doubt, contact your local waste disposal authorities.

Thank you for choosing Velleman! Please read the manual thoroughly before bringing this device into service. If the device was damaged in transit, don't install or use it and contact your dealer.

1.2. Safety Instructions

Keep this device away from rain and moisture .

• Damage caused by disregard of certain guidelines in this manual is not covered by the warranty and the dealer will not accept responsibility for any ensuing defects or problems.
• Keep the device away from splashing and dripping liquids.
  Note that damage caused by user modifications to the device is not covered by the warranty.
• Keep the device away from children and unauthorised users.

1.3. General Guidelines

• This device is battery-operated, using one 3.6V lithium battery (1/2AA)
• Protect this device from shocks and abuse. Avoid brute force when operating the device.
• Protected the device against extreme heat (see "Technical Specifications"), dust and moisture.
• Familiarise yourself with the functions of the device before actually using it.
• All modifications of the device are forbidden for safety reasons.
• Only use the device for its intended purpose. Using the device in an unauthorised way will void the warranty.

1.4. Features

Memory for 32,000 readings (16,000 temperature and 16,000 humidity readings)
- Dew point indication
- Status Indication
- USB Interface
- User-Selectable Alarm
Analysis software
Multi-mode to start logging
- Long battery life
- Selectable measuring cycle: 2s, 5s, 10s, 30s, 1m, 5m, 10m, 30m, 1hr, 2hr, 3hr, 6hr, 12hr, 24hr

1.5.Use

1. Protective cover
2. USB connector to PC port
   3.Start button
3. RH and Temperature sensors
4. Alarm LED (red/yellow)
5. Record LED (green)
6. Mounting bracket

• First install the datalogger software on a personal computer, by inserting the enclosed disc into the CD drive and following the instructions on the screen.
• Remove the protective cover (1) from the datalogger, plug the datalogger into a free USB-slot on the personal computer and start the datalogger software.
• Set up the datalogger software and press the 'Setup' button. Refer to the help-function of the datalogger software ('Help' 'Help topics ...') for more information on the use of the software and setup of the datalogger.
• Remove the datalogger from the USB slot and replace the protective cover (1).

DVM171THD

• Place the device in a location where recording of ambient temperature and/or relative humidity is required. Refer to the technical specifications for allowed operating temperature range.
• When the datalogger is set up to start manually (delayed start), the green LED (6) will flash two times every 10 seconds. Press the Start button (3) until the green (6) and yellow LED (5) flash once (together). The datalogger starts logging and the green LED (6) will flash every 10 seconds (increase this value through the setup procedure to increase battery life).
• To download the data into the personal computer, start the datalogger software, remove the protective cover (1) and plug the datalogger into a free USB-slot.
• Refer to the help-function of the datalogger software ('Help' 'Help topics ...') for more information on downloading and handling the data from the datalogger.

1.6. Troubleshooting

Both LEDs are off

Logging is not active or battery is low. Start logging or replace battery

Green REC LED (6), flashes 1x every 10 seconds

Logging, no alarm condition.

Green REC LED (6), flashes 2x every 10 seconds

Delayed start mode,

Red ALM LED (5), flashes 1x every 10 seconds

Logging, humidity lower limit exceeded.

Red ALM LED (5), flashes 2x every 10 seconds

Logging, humidity upper limit exceeded.

Red ALM LED (5), flashes 1x every 60 seconds

Low battery. Logging will stop, replace battery and download data.

Yellow ALM LED (5), flashes 1x every 10 seconds

Logging, temperature lower limit exceeded.

Yellow ALM LED (5), flashes 2x every 10 seconds

Logging, temperature higher limit exceeded.

Yellow ALM LED (5), flashes 1x every 60 seconds

Logger memory full. Logging will stop, download data.

DVM171THD

Note 1: in case of one alarm, the green REC LED (6) and the red or yellow ALM LED (5) will blink alternately every 10 seconds. When two alarms occur, only the ALM LED (5) will blink, showing alternately the first and second alarm every 10 seconds.

Note 2: when battery is low, all operations will be disabled automatically and memory will be preserved.

1.7. Cleaning and storage

• The humidity and temperature sensors (4) are very sensitive. Avoid dust, smoke and other particles to enter the housing. Refer to paragraph "Sensor reconditioning"
• Wipe the datalogger regularly with a moist, lint-free cloth. Do not use alcohol or solvents. Do not touch the USB connector.
• Do not submerge the datalogger in water or any other liquid.
• There are no user-serviceable parts.
• Contact your dealer for spare parts if necessary.

1.8. Battery

• To replace the battery, disconnect the device from the computer.

(1) Open the battery compartment by using a pointed object (e.g. small screwdriver). Move the pointed object in the direction of the arrow.
(2) Gently pull the datalogger from the casing.
(3) Remove/insert the battery. Only use 3.6V Lithium batteries. Make sure the polarity is as indicated in the casing. When the battery is inserted, the green and yellow LEDs will flash alternately.
(4) Slide the datalogger back in the housing until it snaps into place. Configure the datalogger using the enclosed software.

Note: leaving the device in the USB port will reduce the battery life.

WARNING: handle Lithium batteries with care, observe warnings on battery casing. Keep the battery away from children.

1.9. Sensor reconditioning

Over time, the internal sensor may become compromised as a result of pollutants, chemical vapours or other environmental conditions. This can lead to inaccurate readings. To recondition the internal sensors, use following procedure:

• Heat the datalogger to +80^ (+176^) , humidity < 5% for 36 hours.
• Keep the datalogger at +20 +30^ C ( +70 +90^ F ), humidity >74 % for 48 hours

1.10. Technical Specification

relative humidity (RH) Overall range 0% 100% relative humidity accuracy 0~20% ±5.0%
20~40% ±3.5%
40~60% ±3.0%
60~80% ±3.5%
80~100% ±5.0%
temperature Overall range -40°C ~ +70°C (-40°F ~ +158°F)
temperature accuracy -40~-10°C (-10~+40°F) ±2°C (±3.6°F)
-10~+40°C (+14~+104°F) ±1°C (±1.8°F)
+40~+70°C (+104~+158°F) ±2°C (±3.6°F)
dew point temperature Overall range -40°C ~ +70°C (-40°F ~ +158°F)
dew point accuracy 25°C, 40~100% RH ±2.0°C (±4.0°F)
logging rate Selectable interval, 2sec ~ 24 hours
operating temperature -35°C ~ +80°C (-31°F ~ +176°F)
battery type 3.6V Lithium (½ AA)
dimensions 101 x 25 x 23 mm
weight 172 gr. (6 oz) (battery)

Use this device with original accessories only. Velleman nv cannot be held responsible in the event of damage or injury resulted from (incorrect) use of this device.

For more info concerning this product, please visit our website www.velleman.eu. The information in this manual is subject to change without prior notice.