31
Proceed as follows to measure direct currents of up to 250 mA/DC:
- For measuring in the mA/µA range, select the corresponding measuring range.
- Connect the black measuring line with the COM socket (6) and the red measuring line with the mA
socket (7).
- Now perform null balancing.
- Observe the correct polarity (red = + / black = -) and connect the
two test prods in series with the test object (battery, circuit, etc.).
- If the polarity is not correct, no value is displayed. The built-in pro-
tective diode prevents the measurement. Stop measuring and
measure again observing the right polarity.
- Read off the measured value on the “A” scale.
- After measuring, put the rotary switch in the “OFF” position to turn
off the multimeter.
e) Acoustic continuity check
ƽ
Make sure that all circuit parts, switches, components and any other test objects are
currentless and discharged.
The continuity check allows a quick check e.g. of a line. If forward resistance is <200 Ohm, a beep
sounds with the displayed measuring result.
To measure, proceed as follows:
- Select the measuring range on the rotary switch . -
- Connect the black measuring line with the COM socket (6) and
the red measuring line with the VΩ socket (7).
- Now perform null balancing.
- Connect the two test prods with each other and wait until the
pointer has stabilised. A value of approx. 0 Ohm must be dis-
played. In case of a deviation, adjust the pointer to 0 Ohm using
the 0 Ohm calibration control (9). If calibration fails, the two AA
batteries have to be replaced.
- Now connect the two test prods to the test object (component, switch etc.).
- Read off the measured value on the “Ω” scale. A beep sounds when the resistance value is <200
Ohm.
- After measuring, put the rotary switch in the “OFF” position to turn off the multimeter.
