5
4.6
Change measurement distance
Press and hold the „Distance“-key (with a screw driver through the hole on the right side)
until „change distance“ will appear in the second line. The pre-selected distance in cm will be
displayed in the first line. Press the „function/on“-key shortly to change the distance. With
each short press of the „function/on“-key the proposed distance will appear as follows:
2,5cm => 5cm => 10cm => 20cm =>cps - mode => 1cm ...
When the right distance is shown in the display, please wait (do not press the „function/on“-
key) until the actual measurement value will appear in the second line. The new selected
distance is now also shown in the first line. Please consider this selected distance for the
following measurements. The distance will be measured from the electrode positioned
6.4mm apart from the housing on the modulator side. It is more practical to add 6.4 mm to
any selected distance starting from the front - plate of the unit.
Please note: the distance will be stored !
4.7
Display
The alphanumeric Liquid Crystal Display (LCD) consists of 2 lines for 12 digits each. The
measurement distance in cm will be shown in the first line, while the voltage reading in volts
is displayed in the second line. When the level of 999 volts is reached, the display will switch
automatically into the kV-mode. The display of the voltage reading appears always in 3
digits, such as: 578 V 3,85 kV 24.0 kV and 274 kV. Select a greater distance if „overflow !“
appears on the screen !
4.8
Error message
Appears an error message in the display, the unit switch off after 2 seconds. If the same
error message appears again after restart, please send the unit back for repair.
4.9
Battery voltage control
The EFM 022 has a permanent battery-voltage control. If the battery voltage is less than 7,6
V „Low Battery“ appears in the first line of the LCD and the 9V NiMH block-battery has to be
charged or replaced !
Note: Please use rechargeable - NiMH 9V - batteries only!
5. PC-Interface
The EFM 122 has a serial RS 232 Interface. Connect the EFM with the included serial Cable
to a PC. Put the 3,5” Disc into the PC and start “Install”
Following the instructions on the PC.
6. Grounding
The unit has to be connected to ground for correct measurements of voltage levels and
polarity. Use the grounding socket (4) of the unit for the connection to earth potential. The
unit consists of a conductive housing, thus allow the use without grounding cable if the
operator is on earth potential (e.g. wears conductive shoes, uses a wrist strap or touches
grounded parts).