EKF MASTER M830B - Battery and Fuse Replacement

8
CIRCUIT CONTINUITY TEST (BUZZER)
1. Connect the red probe to the socket «VΩmA», and the black probe to the socket «СОМ».
2. Put the rotary switch to the position .
3. Connect the probes to the points of the measured circuit. In case of electrical contact
between the points (resistance is less than 30 ± 20 Ohm), the buzzer sounds.
4. When the work is nished, put the rotary switch to the «OFF» position.
SIGNAL GENERATOR (for model M832)
1. Connect the red probe to the socket «VΩmA», and the black probe to the socket «СОМ».
The polarity of the red probe is considered positive.
2. Set the rotary switch to the position
3. The square signal of rectangular shape with 50 Hz frequency appears between sockets
«VΩmA» and «COM». The output voltage is approximately 5 V and contains a DC voltage
component, so an isolation capacitor should be used.
4. When the work is nished, put the rotary switch to the «OFF» position.
The output signal is used. The circuit is not protected against short circuit.
Do not apply more than 40 V voltage to the probes in this mode.
BATTERY AND FUSE REPLACEMENT
If the symbol is displayed, the battery needs to be replaced. The fuse rarely needs
to be replaced and frequently blows due to user’s error. To replace the battery and fuse (500
mА/250 V), unscrew 2 screws on the back lid of the device. Remove the failed element and
replace it with a new one. Observe the polarity of the battery. Close the housing, tighten the
screws.
Before replacing the battery, make sure that the probes are disconnected from the
tested devices and the rotary switch is in the «OFF» position.
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