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2
Sockets
2 sockets fo
r connecting the sensor and the”Interface HMG USB” are located on the front side of the instrument.
Please use only the delivered original cable for the interface with the PC. For protecting the sockets against mois-
ture and to avoid corrosion, the sensor should always be connected to the instrument and the
„Interface HMG
USB” socket should be sealed by means of the protection cap if it is not in use. The „Interface HMG USB” is not
included in the delivery.
The measuring inputs must be potential-free and must have no connection to mains voltage potentials.
All inputs must be operated with the appropriate sensors only. Connect directly from foreign signals is
not allowed.
Cable Sockets
2.1 Battery
Please open the battery chamber on the back side of the instrument and insert the battery correctly into the
chamber.
Battery Chamber
Please use only leak proof alkaline manganese batteries from the type
AA, IEC R6, LR
6 only. After
connecting and inserting the battery, please close the battery chamber carefully and correctly, to avoid
moisture coming inside the device.
If the battery is in low condition, the device shows these with only 1 bar in battery indicator display. A
change of the battery is recommended. If there is no bar in the display, the battery must be changed
immediately.
Please note
: The main printed board carries a lithium battery. Batteries should not to be disposed of
with the normal domestic waste. They will be taken back and recycled or disposed of properly by the
manufacturer at no cost.
Only for AM 40:
After changing battery or sensor please note the wait time before a new calibration. We recommend a
new calibration after battery change, because the permanent polarisation of the sensor was inter-
rupted by disconnecting the sensor from the battery.
