User manual
H60.0.71.6C-04 Manual Appendix GMH 38-LW1 / -LW2 page 2 of 8
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1 General Note
Read this document carefully and get used to the operation of the device before you use it.
Keep this document within easy reach near the device for consulting in case of doubt.
Mounting, start-up, operating, maintenance and removing from operation must be done by qualified, specially trained
staff that have carefully read and understood this manual before starting any work.
The manufacturer will assume no liability or warranty in case of usage for other purpose than the intended one, ignor-
ing this manual, operating by unqualified staff as well as unauthorized modifications to the device.
The manufacturer is not liable for any costs or damages incurred at the user or third parties because of the usage or
application of this device, in particular in case of improper use of the device, misuse or malfunction of the connection
or of the device.
The manufacturer is not liable for misprints.
2 Safety
2.1 Intended Use
The GMH 38-LW Set is a complete set for material moisture measuring including an handheld instrument
(GMH 38 series) with moisture display and rating for agricultural use.
The robust measuring probe (GSF 50 TF / TFK) makes the set a first-class tool for humidity measurements
of wood chips, grain and lightly pressed straw or hay (bales). With firmly pressed bales, we recommend the
measuring probe GSF 40 TF (not in scope of supply).
The measuring probe is connected via BNC-plug and thermocouple connector and can be interchanged.
Depending on the application, either the moisture content u (relative to dry weight) or the wet-basis moisture
content w (relative to total weight) can be displayed.
Please note the remark of measuring accuracy in chapter 5.
2.2 Safety signs and symbols
Warnings are labeled in this document with the followings signs:
DANGER
Caution! Symbol warns of impending danger, death, serious bodily inju-
ry or serious property damage if ignored.
Attention! Symbol warns of potential hazards or hazardous situations
that can cause damage on the equipment or the environment if ignored.
Note! This symbol point out processes which can indirectly influence
operation or provoke unforeseen reactions at non-observance.
2.3 Safety Instructions
This device has been designed and tested in accordance with the safety regulations for electronic devices.
However, its trouble-free operation and reliability cannot be guaranteed unless the standard safety measures and spe-
cial safety advises given in this manual will be adhered to when using the device.
Risk of injury! Only use this injection probe is extremely carefully,
keep it out of reach from children.
3 Operating and Maintenance
Treat the injection probe carefully (do not throw, hit against etc.). Protect plugs and sockets from
soiling.
When disconnecting the cable from the socket do not pull at the cable but on the plug. For lock-
ing and unlocking the movable ring has to be turned in its according direction. When having at-
tached the plug right, it can be connected or disconnected gently without effort.
The plastic insulator (3) has to be clean and dry in the range of the sensor pike, when not, faulty
measurements may occur.
DANGER