34
10. Measuring mode line allocation
In no event exceed the max. permitted input value of 16 V/DC. Do not contact circuits or parts of
circuits if there could be voltages higher than 25 V ACrms or 35 V DC present within them. Mortal
danger!
Before measuring, check the permanently connected measuring lines for damage such as, for ex
-
ample, cuts, cracks or squeezing. Defective measuring cables must no longer be used. Risk of
wrong measuring results!
Measuring is only permitted with closed housing and battery compartment.
Always turn both devices for cable allocation off after operation. The devices do not turn off auto
-
matically like the DMM.
The cable allocator consists of two parts. The transmitter (REMOTE UNIT) is required for operation; it applies the cor-
responding numerical coding to the test lines. The receiver in the DMM decodes this ID and shows the corresponding
number on the LED display (1). All you need for identification is a known reference line. This may also be an available
water pipe, heating pipe, etc.
a)
Turning the cable allocators on (trans receiver)
The remote unit (transmitter) and the receiver (in the DMM) is activated and deactivated via a press switch (13 and
16). When the switch is pressed, both devices are turned on. To turn off press the switch again.
Operation is signalled with the display “OP”. The display “OP” (1) is lit on the DMM receiver unit; the display “OP” (17)
blinks on the transmitter unit.
Prior to working with the cable allocation device, you have to insert the enclosed batteries. Inser
-
ting and changing the battery is described in the chapter “Maintenance and cleaning”.
b) Continuity test
Continuity tests can be performed with the receiver unit on the DMM. Resistances of approx. <100 Ohm are signalled
acoustically.
1
Proceed as follows to perform a continuity test:
-
Switch the receiver unit on by pressing the switch “ON/OFF” (13). The switch
snaps into place and the LED display (1) shows “00”. The operating indicator
“OP” will light up.
-
Press the button “R test” (2). The display “OP” will go out. The continuity test
function is active.
- Connect the two banana clips with the lines to be tested. In case of low-
impedance continuity (approx. <100 Ohm), an acoustic signal sounds.
-
Terminate the continuity test by pressing the button “R test” and turn the receiver unit off manually (button “ON/
OFF”).
