CAISSON GM-200 User manual

GM-200
HYDROMETER
INTRODUCTION
The hydrometer is used to measure the moisture
content of concrete, plaster, cement, EPS, and also
wood.
The undeniable advantages of the method are:
•high resolution,
•ease of use,
•non-destructive measurement.
The compact frame size, ergonomic shape and non-
slip rubber on the edges of the device ensure a firm
grip and convenient use.
The installed accelerometer allows for proper
alignment of the device for measurement thus
increasing the comfort of its use.
TECHNICAL DETAILS
•Dimensions: 42x79x24mm
•Weight: 200 g (with battery pack)
•ower source: two AA batteries
•Average operating time with full batteries: 20 hours
•Display: monochrome with a resolution of 28x63 pixels, backlit
•Manual screen orientation
•Operating temperature: 5°C to 40°C
•Scales: 9 measurement scales
CAISSON Elektronik GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
tel: [phone] [email protected] www.caisson-gmbh.de

1 – status bar, 2 – measurement result, 3 – name of the selected scale; 4 – “SELECT MATERIAL” button,
5 – “ON” button, 6 – “SELECT DIS LAY” button
INSTRUCTION
1. Turning the hygrometer ON
Press the „ON” button to turn the device on. The hygrometer will start automatically, without
calibration. When the device turns on, the display will show the latest-selected scale. If the battery
level is too low, such information will be displayed amd then the device will turn off.
2. Turning the hygrometer OFF
If the device is not used for a longer time, it shuts down automatically, so as to extends the life of
the batteries.To manually turn the device off, press and hold the “SELECT MATERIAL” button.
During every shut down, the latest-selected settings (scale, language, alarm thresholds) are saved.
3. Measurement
The device analyses the dielectric properties of the material by measuring the electric field emitted
by a metal ball. Dielectric properties depend on moisture content, bulk density of the material and
metal elements. CAUTION! If metal parts (i.e. nails, screws) are present within the measurement
area, the results will be biased towards higher values. The results of the measurement are displayed
on the screen. The hygrometer has 9 scales that can be used to determine the moisture content of
the material. The selected scale is displayed at the bottom of the screen.
To perform a measurement, press the metal ball to the material and press and hold the “ON”
button.
4. Scale selection
The device is equipped with multiple scales, which eliminates the need to use adjustment tables.
This makes measurements not only more precise, but also easier.
The selected scale is displayed at the bottom of the screen. To change the measurement scale,
briefly press the “SELECT MATERIAL” button. CAUTION! When the device turns on, the
display will show the latest selected scale.
CAISSON Elektronik GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
tel: [phone] [email protected] www.caisson-gmbh.de

Table 1. Names and descriptions of the measurement scales available in GM-200
Scale No. Scale name Description
Relative Scale
[%] Basic scale. Shows the relative humidity of the material.
2
Anhydrite Screed
[Wt%]
This scale is meant for moisture measurements in anhydrite floors. The displayed value is
an approximation of the value that normally would be indicated using a CM-measurement
device.
3Anhydrite screed
[Wt/CM%]
This scale is used to measure the moisture content of anhydrite. The displayed value is an
approximate value that can be also determined with the Carbide Method (CM).
4Cement screed
[Wt%]
This scale is used to measure the moisture content of cement screed. The content of water is
expressed as a percentage of weight
5Cement screed
[CM%]
This scale is used to measure the moisture content of cement screed. The displayed value is
an approximate value that can be also determined with the Carbide Method (CM).
6Concrete
[Wt%]
This scale is used to measure the moisture content of concrete. The content of water is
expressed as a percentage of weight.
7Gypsum screed
[Wt/CM%]
This scale is used to measure the moisture content of gypsum plaster. The content of water
is expressed as a percentage of weight.
8Hardwood / Oak
[Wt%]
This scale is used to measure the moisture content of wood with a density of
0.6-0.9 [ 03 kg/m3] (i.e. oak). The content of water is expressed as a percentage.
9Softwood / Spruce
[Wt%]
This scale is used to measure the moisture content of wood with a density of
0.4-0.55 [ 03 kg/m3] (i.e. spruce). The content of water is expressed as a percentage.
5. "HOLD” function
The Hold function displays the last measured value. It is activated automatically when the “ON”
button is release. When the device switches to the Hold mode, the following symbol appears at the
top of the display on the status bar.
6. Menu
The operating menu allows for changinge alarm thresholds for the respective measurement scales
and selecting at language. To access the operating menu, press and hold down the “SELECT
MATERIAL” and “SELECT DISPLAY” buttons. Use the “SELECT MATERIAL” and “SELECT
DISPLAY” buttons to navigate the menu. Use the “ON” switch to change menu levels and to
confirm the settings. CAUTION! Critical parameters are protected against unintended
modification with the use of an additional warning and request for confirmation.
CAISSON Elektronik GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
tel: [phone] [email protected] www.caisson-gmbh.de

To navigate to the parent menu, press “Back” and briefly press the “ON” button. To exit to the main
window, confirm the “Back” option of the top level menu.
GM-200 in menu mode. 1 – Select the previous menu item or decrease a value, 2 – Confirm the selected
option or value, 3 – proceed to the next menu item or increase a value.
7. Alarm
Exceeding the set value will trigger a sound alarm. For each scale an individual alarm threshold can
be set. Alarm thresholds are set in the operating menu. To change the setting for the material of
choice, select the “Alarm Level” item in the operating menu and press the “ON” button. After
selecting the scale, press the “ON” button once again to set the alarm threshold. After changing the
alarm threshold, confirm the value by pressing the “ON” button.
To protect against accidental changes, it is necessary to confirm the action by pressing the „ON”
button once again. To cancel the change, press the “SELECT MATERIAL” button. Alarm
thresholds are stored in the memory, even if the batteries are removed. If the “Factory Settings”
(Werkseinstellungen) option is selected, all the changes will be replaced with the factory settings.
8. Language selection
The software has been designed to allow the user to choose between different languages. The
language is changed from the menu. To open the language selection menu, select the Language
item in the operating menu and confirm by pressing “ON”. Select the language and confirm by
pressing “ON”. To protect against accidental changes, it is necessary to confirm the action To
confirm the change press the “ON” button once again, press “SELECT MATERIAL” to cancel.
Language settings are stored in the memory, even if the batteries are removed.
9. Restore factory settings
Factory reset will undo all the changes of the alarm thresholds. To restore the factory settings,
select the “Factory Settings” (Werkseinstellungen) item from the menu and confirm by pressing the
“ON” button. To protect against accidental changes, it is necessary to confirm the action To confirm
the change press the “ON” button once again, press “SELECT MATERIAL” to cancel.
CAISSON Elektronik GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
tel: [phone] [email protected] www.caisson-gmbh.de

10. ower supply
The GM-200 hygrometer is powered by two AA batteries. You may use either disposable or
rechargeable batteries. The Battery status indicates the battery charge level. If an empty battery icon
is displayed, replace the batteries. Batteries should be replaced with a new set of batteries of the
same kind. Do not use a rechargeable battery in combination with a disposable battery or a partially
discharged battery with a full battery. The figure below shows the location of the batteries in the
battery compartment.
11. 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 accompanied by a proof of purchase with the
date of sale specified. Warranty repairs shall be performed only by an authorized distributor of
CAISSON. The following are excluded from the warranty:
●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 instructions for use
●normal wear and tear
The warranty also excludes devices that are partially or entirely disassembled.
CAISSON Elektronik GmbH
Boschstrasse 16, D-47533 Kleve, Deutschland
tel: [phone] [email protected] www.caisson-gmbh.de