DIGITAL HUMIDITY/TEMP. METER MANUAL

TH-4000

Digital Humidity/Temp. Meter
Instruction Manual

ATTENTION

Please note that misuse of this device may lead to injury
to the user or damage to the device.
Please observe all safety precautions and warnings inthis instruction manual.

Customer Service

TH-4000

Address:Thank you for purchasing our Digital Humidity/Temp. Meter.
Please read this instruction manual carefully before using
to ensure the correct usage of this device.
Please keep this instruction manual for future reference.
Safety Precautions

For safe usage of this device, please observe all statements regarding
precautions and warnings in this instruction manual.

ATTENTION

Contact :E-mail :Web:- Do not use this device near machines that emit strong electromagnetic
fields or objects that store static electricity.
- Do not drop or subject this device to strong impact.
- Do not use or store this device where it will be exposed to water or inplaces with wet conditions.
- Do not use or store this device where it can be exposed to direct sunlight,
dust, high temperature and high humidity.
- Make sure to remove the pH electrode when changing the battery.
- See the battery case markings to ensure that the battery is properly installed.
- For accurate measurements, do not subject this device in measuring suddenchange of temperatures.
- Remove the battery when the device will not be used for a long period of time.
- Do not attempt to disassemble or modify this device.

1. Functions

37-7 Chuo-cho, 2-Chome
Meguro-ku, Tokyo 152-0001 Japan
Please visit our company website for contact details.
webtrade@line.co.jp
https://www.lineseiki.com

64

531Dew

21)
2)
3)
4)
5)
6)

%RH

1. Main(Humidity/Dew Point)Display
2. Sub(Temp.)Display
3. Data Hold
4. REC
5. Recording Data
MAX/MIN
6. Low battery

Insert the Battery into the Battery Box.
(Refer to section 6.Battery Replacement).
Insert the probe into the input socket.
Press the [POWER] button to switch-on the device.
Hold out the probe towards the object to be measured.
The measured values will show on the display.
Main display shows humidity value and sub display shows
Temperature value.
Press the [POWER] button for at least 2 seconds to switch-off
the device.

3. Functions Operation

Front View

Side View

Back View

Probea.Dew Point measurement1)

111)
102
345

During the measurement, press the [FUNC] button to switch thehumidity value to Dew point value on the main display.
To view back humidity value, press the [FUNC] button again.

b.Data Hold1892)

During the measurement, press the [HOLD/ESC] button to holdthe last measured value on the display.
The display will also show the "HOLD" symbol.
Press the [HOLD/ESC] button again to exit the Data Hold function.

c.Data Record (Max. / Min. Reading)1)2)Base View

6. Input Socket
126
7. 9VDC adapter socket *8. [SET] Button
713
9. RS-232 output terminal
10. Batterycompartment / Cover
11. Probe Head
1. Display
12. Probe Handle
13. Tripod mounting hole
2. [POWER] Button
3. [HOLD/ESC] Button(1/4” screw size)
14
4. [REC/ENTER] Button
14. Cable
15
5. [FUNC] Button
15. Probe Plug* Use only the AC/DC adapter designed for this device.
Switch-off the device before connecting AC/DC adapter.

6. Battery Replacement

1)1) When theLow Battery indicator appears on the display, it isnecessary to replace the battery to maintain accurate readings.
2) Remove the battery cover as shown below.
3) Replace the battery with a new one and position the new battery
correctly inside the device’s battery compartment.
4) Attach the battery cover.
* The unit cannot measure accurately after low battery indicator isdisplayed. Please replace the battery immediately.

2)
3)
4)

3)

Before executing Setting Procedure, exit the Data Hold function
and the Data Record function.
Press the [SET] Button for at least two seconds to enter theSetting Procedure.
When the main display shows "" and sub display shows"", please just press the [REC/ENTER] button.
When the sub display shows "", Press the [FUNC] button toselect "0" or "1".

Battery Cover Removal

0 : Auto Power Off function is disabled.
1 : Auto Power Off function is enabled.

Battery Insertion

Battery Cover Attachment

After selecting the desired value (0 or 1), press the [REC/ENTER]
Button to save the setting.

REC MAX MIN HOLD

Default settings:

TH-4000

e. Setting Procedure of Auto Power Off function

2. Measuring Procedure* Auto power oﬀ.

1. Operation

LINE SEIKI CO., LTD.

DIGITAL HUMIDITY/TEMP. METER MANUAL

To start recording the measurement data, press the [REC/ENTER]
button once. The display will show the "REC" symbol.
While the "REC" symbol is on display, press the [REC/ENTER]
button once to display the Maximum measured data recorded.
The "MAX" symbol will also appear on the display.
Press the [REC/ENTER] button once again to display the Minimum
measured data recorded.
The "MIN" symbol will appear on the display.
To view back "Max"("Min") measured data, press [REC/ENTER]button alternately.
To exit the Data Record function, press the [REC/ENTER] button
for at least 2 seconds.

d.Auto Power Off
The device automatically switches off if "1" is selected in Advanced
Setting Procedure and none of the buttons are pressed forapproximately 10 minutes .
The Auto Power Off function is disabled automatically while Data
Record function is executed.

5)

Please just press the [HOLD/ESC] button to finish the Setting
Procedure and return to the measure mode.

4. General Specifications
Main Unit

8. Storage
For proper storage, avoid places where the device can be exposed todirect sunlight, high humidity, high temperature, vibration and shock,dust, rust, corrosion, etc. Remove batteries and electrode if thedevice will not be used for a long period of time.

TH-4000

ModelSensor Type
Measuring Unit
Sampling Time
Functions
Display* Do not damage the leadwire when attaching the battery cover.

Humidity: High Precision Thin Film
Capacitance Sensor
Temp. : Thermistor
Humidity : ％RH
Temp. / Dew Point : °C

7. RS-232 PC Serial Interface
The temperature measurements and measured data graph can bechecked and viewed on a computer through the RS-232
output option in the unit.

Approx. 0.8 second.
Data Hold, Max/Min,
Auto Power Off
LCD:44mm x 28mm
Digit Size:Main 14mm, Sub 7mm

Data Output

RS-232 Serial Interface

Power Supply

006P (DC9V) battery x 1 pc.

Battery Life

Approx. 104Hours.

Communication Setting

0 - 50°C(Main Unit) 0 - 80°C(Probe)

Operating humidity 80%RH max(Main Unit) 95%RH max(Probe)
Dimensions

Main Unit:135(H)x60(W)x33(D)mm
Probe: 26mmx200mm (Head: 15mm)
Cable Length:Approx. 1mweight

Approx. 264g (including batteries, Probe)

Content

Instruction Manual, Probe x 1pc. 006P battery x 1pc.

Compliance

8 bit
1 bit

Data bit
Stop bit

Communication Format

Current Consumption Approx. 4.6mA
Operating Temp.

9600
None

Baud Rate
ParityCE, RoHS

Accuracy

D15STX(ASCII Code)D144(Fixed)

D13

To send the upper display data = 1
To send the lower display data = 2

D12 D11

Annunciator for Display °C=01

D10

Polarity
0=Positive, 1=Negative

D9

Decimal Point(DP), position from right to the left
0=No DP, 1=1DP, 2=2DP, 3=3DP

D8 - D1

Display reading D8=MSD, D1=LSD(Ex : If the display reading is 1234, then D8 to D1 is : 00001234)

D0CR(ASCII Code)

Measuring Range

ResolutionAccuracy

10 - 95％RH

0.01%RH≧70％RH ±(3%reading+1)％RH＜70％RH ±3％RH

For Example: HEX
02 34 31 30 31 30 31 30 30 30 30 30 32 34 32 0d

Humidity
Temperature

0 - +80°C

0.01°C±0.8°C

Dew Point-25.3 - +48.9°C

0.01°C** Dew Point value is calculated from the humidity/temp. measurement.
The accuracy is depended on those of temperature and humidity
measurement.
* Temperature Conditions : 23±5°C environment testing.

5. Cleaning
Wipe off dust and other dirt from the main unit with a dry cloth.

CautionPlease do not wipe with benzene or thinner.
It may cause cracks or discoloration to the surfaceof the main unit.

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
upper:1
lower:2

STX 4

1°C0+ DP101

Display (value)
00000

242 CR* The Output and Display change timing are in real-time.

9. Accessories- Real-time Measurement Software : U801- USB cable : USB-01- AC/DC Adapter : ZTC9021
The probe is not sold separately.
If the probe is damaged, please contact our sales representatives
or distributors.

This manual was last revised Dec. 22, 2022. 4LU025B*Specifications and printed contents are subject to change without prior notice.
All Rights Reserved,Copyright 2022,LINE SEIKI CO.,LTD.