CAISSON LVT-15 IR User manual

CAISSON ELEKTRONIK GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
T: [phone]
[email protected] www.caisson-gmbh.de
THERMO-HYGROMETER LVT-15 IR
User Manual
Description :
The compact thermo-hygrometer LVT-15 IR is used for measuring air temperature and relative air humidity
(RH). These measurements enable the device to computes the value of the dew point. The instrument is
equipped with a 3,5mm jack for additional temperature measurement (STP-10A). The device contains an
inbuilt infrared sensor (IR) for measuring surface temperature.
Specifi cations:
2 x AA 1,5 Volt
34mA
146 mm x 79 mm x 26 mm (H×B×T)
200g
monochromatic with backlight
128 x 64 pixel
5ºC ~ 40ºC <80% of rel.humidity without condensation
Power supply:
Current consumption:
Dimensions:
Weight:
Display:
Resolution:
Operating conditions:
The kit includes:
1. LVT-15 IR device,
2. batteries,
3. case,
4. manual.
Note: The device is supplied with the case.
Note: Surface temperature sensors are not included,
they are sold separately.
WITH IR SENSOR

CAISSON ELEKTRONIK GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
T: [phone]
[email protected] www.caisson-gmbh.de
Measuring range
The illustration shows the most important elements of the equipment
Function Range Accuracy Sensortype
air temperature -10 ~ +50°C ±0,3°C thermistor
air humidity 5 ~ 95% of relative
humidity ±2 % capacitive sensor
dew point -30 ~ +100°C -30 ~ +100°C
calculated from the relative humidity
and the measurements of the air tempe-
rature
IR temperature
sensor
Embedded surface
temperature
-30 ~ +250°C ±0,3°C Infrared
surface tempera-
ture as
extra item
-10 ~ +50°C ±0,3°C
STP 10A external
3,5 mm jack for
thermocouple connector

CAISSON ELEKTRONIK GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
T: [phone]
[email protected] www.caisson-gmbh.de
• To switch on the measuring device, press the function
button.
• When switched on, the device shows:
»air temperature,
»relative humidity,
»dew point,
»surface temperature.
Note: If bars „---”, like these „---” show up, they can indicate that:
• the thermistor is not connected,
• the thermistor is damaged,
• the temperature range is excessive.
• Pressing the function key will cause sequential switching between the individual measured values. The
value of the measured parameter is shown enlarged on the screen; in this way one can highlight the
variable of interest. Other parameters are sequentially shown in this operating mode the bottom of the
screen in „the infobar”. Press the function key again to have other values highlighted.

CAISSON ELEKTRONIK GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
T: [phone]
[email protected] www.caisson-gmbh.de
• Press of the function key six times repeatedly to activate the menu. Here the language setting, tempera-
ture unit, automatic switching off and the infobar can be changed.
The following options can be selected:
»Language [English, Deutsch]
»Temperature units [°C, °F]
»Automatic switching off [Off , 3Min., 5Min., 10Min.] – determines the lenght of downtime,
after which switch off automatically. Downtime is the period during which the function key is not
pressed. If the automatic switch off function is adjusted to „off ”, the equipment can only be swit-
ched off manually.
»The infobar [1sec, 2sec, 4sec] – determines the refreshing rate of the values in the infobar.
In order to make changes, the desired option is to be selected with a click. Press the key for approximately
2 seconds, until the selected option begins to fl ash and becomes active. Press the key for another 2 seconds
to deactivate the function. In order to get out of the setup menu and back into the measuring mode, select
SAVE & EXIT, then keep the key pressed for 2 seconds.
The following pictures show the described procedure.

CAISSON ELEKTRONIK GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
T: [phone]
[email protected] www.caisson-gmbh.de
Switching - off the device
• In order to switch the device off , press and hold the function key for approx. 6 seconds. It cannot be
done from the setup menu.
• The measuring can switch off automatically; if the function for automatic switching off is active (see
section menu of the device).
• If the battery charge is so low that in fact it could negatively aff ect the measurement the device will
automatically switch off , which is signalled earlier with the message „battery empty”.
Press the function button
Press the functions button 6 times
Press and hold the function button for 2 seconds
Practical hints
• The air humidity and air temperature sensor are be-
hind a plastic screen that should not be covered
or else free air circulation will be obstructed and me-
asurements rendered inaccurate.
The air fl ow through the cover of the sensor
• The air humidity and air temperature sensor needs time,
in order to adapt to new measuring conditions. Wait 2
minutes prior to activating the device. This time can
be shortened by gentlye moving the device, which will
force the air fl ow across sensor cover.
temperature of the assistance of a thermal element checked surface is lower or very similar to the dew point
temperature, then condensation of water on the surface occurs, which is signalled acoustically and visually.
• The device can also measur the dew point. If the

CAISSON ELEKTRONIK GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
T: [phone]
[email protected] www.caisson-gmbh.de
Power supply
The LVT-15 IR hygrometer is powered by two disposable or rechargeable AA batterie The battery status
indicates the battery charge level. If an empty battery icon is displayed, replace the batteries with the same
battery type. Do not combine a rechargeable with a disposable battery or a partially discharged with a full
battery.
The fi gure below shows the location of the batteries in the battery compartment.
Warranty
Notwithstanding the statutory warranty claims, CAISSON provides a warranty in accordance with the laws
of the Customer’s country for a period of at least two years from the date of sale of the device to the end
user. The warranty covers only those faults which are caused by defects in material or workmanship. A
warranty claim must be provided with a dated proof of purchase. Warranty repairs can only be performed
by an authorized distributor of CAISSON.
Warranty does not cover:
»misuse,
»use of force, damage caused by external factors or foreign bodies such as sand or water,
»damage caused by failure to comply with the user’s instructions,
»normal wear and tear.
The warranty also excludes devices that are partially or entirely disassembled.