Manual
25
5.3.3 Backlight
The receiver unit is equipped with the backlight option. To activate the backlight, just a corresponding
button should be pressed. The transmitter has no backlight function.
5.3.4 Mute
On the transmitter, mute function can be activated via the button for muting. After that, the device does
not make any sound when the button is pressed. Renewed pressing of the same button activates the
sound again.
On the receiver, the backlight / mute button must be pressed for one second. Thus the tones are turned
off. Renewed pressing for one second brings this setting back.
5.3.5 Automatic shutdown
Of both devices only the receiver has an automatic shutdown function. This works only then, when for
about 10 minutes no activity via button pressing or similar takes place. To switch transmitter off the Power
button must be used.
6 Maintenance
6.1 Finding errors / Troubleshooting
If the device does not measure correctly, the following points should be checked first:
Problem
Please check:
Solution
The device cannot be turned on
Are all the batteries used?
Insert new batteries
Is the battery voltage too low?
Are the batteries inserted with
correct polarity?
Check, if the polarity is correct
The transmitter does not display
the external voltage
Is there a sufficient contact?
Connect the cable again
Is the measuring sensor
defective?
Replace the measuring sensor.
Is the measuring sensor
inserted completely?
Insert the measuring sensor
completely
Is the test lead defective?
Renew the test lead
Is the test lead inserted
completely?
Insert the test lead completely
The power supply is interrupted
during the measurement
Is the battery voltage too low?
Insert new batteries
Has the device turned off
automatically?
Turn the device on again
The transmitter cannot display
any signals transmitted by it.
Was the button for transmission
pressed?
Start the transmission again
Is the fuse of the device
defective?
Send the device back
6.2 Fuse
The fuse on the transmitter can prevent its damage caused by overload or false application. If the fuse of
the transmitter does not function correctly any longer, the transmitter itself can produce only weak signals.
If the self-test of the transmitter was successful, but it still sends only weak signals, it means that the
transmission works, but the fuse does not work correctly any more. If not signal was found during the
transmission in the process of self-test and the device has got the batteries with sufficient battery voltage,
it means that the transmitter is defective and must be repaired by the qualified personnel or replaced.
Procedures and steps for checking the fuse:
1. Interrupt all the measuring correct circuits of the transmitter.
2. Turn the transmitter on and set it into the transmission mode.
3. Set the power of the transmitter to I.
4. Connect the end of the test lead to the connector of the transmitter.
