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A.3.8
Definitions
A.3.8.1
Definition of the category and degree of pollution
CAT II 60V:
This notion of categories determines the maximum voltage which can be applied to the measuring inputs (it is
also referred to as the over voltage category). For the TM612, the ceiling over voltage is (DC or AC)
POL 2°:
The notion of pollution determines the clearance between circuits. Degree 2 authorizes temporary conductivity
caused by condensation.
A.3.8.2
Table of symbols used
Symbol
Name
Attention: see the accompanying documents
Earth
Compliant with the European Union directives
Category II, Pollution 2.
CAT II Pol 2
Maximum common mode voltage compared with the ground=60V
60V
A.4
Maintenance
The device must always be repositioned in accordance with the instructions provided herein. Any incomplete or
incorrect assembly could compromise the safety of the operator.
The authority responsible must regularly ensure that all safety-related items are not worn and ensure all the
preventive maintenance operations required are performed.
Before opening the device for any maintenance operations, you must make sure that all the wires are
disconnected from the appliance.
All adjustments, maintenance and repair work on the open device must be avoided as much as possible and,
when these are indispensable, they must be performed by qualified staff, who are well aware of the risks
involved.
TM612
TM612
B.
U
SING THE INSTRUMENT
In order to use the device in a safe manner, all operators must read the paragraph on safety carefully, along
with the paragraph below.
B.1
Power-up
The device is delivered with 4 AA batteries of 1.5V each. To install the batteries into the compartment,
unscrew the screw on the back of the unit. Once the batteries are in place, screw the cover back on.
Observe the polarity: an incorrect battery positioning could damage the device. The correct polarity is
indicated inside the compartment. The figure below illustrates how to open the battery compartment as well as
the correct positioning of each battery.
To turn the unit ON, press the ON/OFF key until the first "Checking EEPROM" screen comes up. (This may
require pressing and holding the key for up to 5 seconds.)
To turn the unit OFF, press the ON/OFF key until the "Instrument in power off mode" screen comes up. Please
note: instruments, whose serial number ends in "B", will not retain the time and date when powered off. If
time and date need to be retained, the unit can be put in standby mode.
To enter standby mode, press both the HOLD and ON/OFF buttons until the screen displays "Instrument in
standby mode".
To return to normal operating mode from standby mode, press the ON/OFF key until the original screen comes
up. Please allow a minimum of 10 seconds between going into standby mode and returning from it.
B.1.1
The keyboard features:
•
•
•
•
•
•
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Battery
compartment screw
The keyboard
2 function keys (F1 and F2) for the selection of the various menus displayed on the screen.
The navigator, consisting of 4 arrows (up (↑ ↑ ↑ ↑ ), down (↓ ↓ ↓ ↓ ), right (→ → → → ), left (← ← ← ← ).
A clear key (CLEAR).
A device on/off and backlighting on/off key (ON/OFF).
Press briefly to start the device. During operation, press briefly to turn the backlight on or off.
Press it longer for 2 seconds to turn off the device.
A validation key (VAL).
A HOLD key allows you to suspend a process temporarily (when pressed briefly). If you press it
longer, this key makes it possible to switch from measuring mode to emission mode and vice-
versa.
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