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3. Putting into operation
3.1 General information
The DSP TT1
does not
switch on automatically. For voltage tests of the self-test must be performed (see 3.4)
first.
Switch-off:
Press button until „oFF“ is indicated. When no voltage is applied, the device switches off auto-
matically after 90 s. The display illumination switches off after approximately 5 s when no voltage is applied.
3.2 Battery
Your instrument is already supplied with a 9 V block battery in accordance with IEC 6LR61 / 6LF22 / 6LP3146.
The battery status is indicated by a battery symbol on the display (see section 5).
You need to change the battery of the device before continuing with testing when the empty battery symbol
on the display flashes.
3.3 Establishing contact with earth
Put the contact magnet on top of the rail to establish secure
contact to the earthed rail.
The contact surface has to be clean and free from coarse rust.
3.4 Testing correct display and function (self-test)
In accordance with EN 50110-1 (VDE 0105-1) voltage testers must be checked if they function correctly,
briefly before and whenever possible after the use, for determining absence of voltage.
Step 1 – Test of the display
The device must be switched off for the self-test. Press and hold button . All display segments light up on
the display, the backlight changes between red and white and the 2 LEDs lights up and an acoustic signal
occurs. Release button „TEST“ is indicated on the display.
Step 2 – Check test circuit and protective resistors
Hold the test electrode to the earthed rail. If „Rdy“ appears
and the green LED lights up, then the MultiSafe DSP TT1 is
ready for operation and the contact to earth is tested.
Note:
In case the function test has not been successful, check the
following:
- Is there a connection to the rail?
- Battery empty?
- Test electrode screwed tightly?
- Line screwed tightly?
Repeat the function test
!
Attention!
If one of the displays fails during the self-test – even if only partial failure occurs – or if the instrument does not
indicate a function standby, the voltage tester may not be placed into operation!
