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Operating instructions/ Suggested uses
Digital multimeter, Order no. 10002896
Congratulations on purchasing a Rothewald digital multimeter. This is a battery-
powered manual multimeter that can be used for measuring DC and AC
voltages, current strengths and resistances and also for testing diodes.
A protective cover with built-in stand and two test cables are included.
Please follow all the operating and safety instructions to ensure that the unit is
used safely and to keep it in good condition.
Before using this unit with your bike or car, consult your vehicle's repair and
maintenance manual for the requisite measured values and model-specific
measurement instructions.
Improper use of this multimeter may result in damage to the device itself or to
your vehicle!
Control panel
1: 15 mm high LCD display, 3 1/2 digit.
2: Rotary switch for On/Off, and for selecting function and measuring range.
Clockwise rotation selects the following functions / ranges:
Off; AC voltmeter 600 V, 200 V; DC ammeter 20 µA, 200 µA, 2 mA, 20 mA,
200 mA, 10 A; diode testing; ohmmeter 200 Ω, 2 kΩ, 20 kΩ, 200 kΩ, 2 MΩ;
DC voltmeter 200 mV, 2 V, 20 V, 200 V, 600 V.
3: Hold function: if "Hold" is pressed, the display will retain the last measured
value and will indicate this with an "H" symbol until "Hold" is pressed again.
4: 10 A jack, unfused: insert the positive test cable (red) here to measure
currents in the 10 A measuring range.
5: COM jack: insert the negative test cable (black) here.
6: VΩmA jack: insert the positive test cable (red) here to measure voltage,
resistance and DC (up to 200 mA, fused).
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Summary of Contents for Rothewald 10002896
- Page 1 Operating instructions/ Suggested uses Digital multimeter, Order no. 10002896 Congratulations on purchasing a Rothewald digital multimeter. This is a battery- powered manual multimeter that can be used for measuring DC and AC voltages, current strengths and resistances and also for testing diodes.
- Page 2 - 2 - Technical specifications Display accuracy is guaranteed for a period of one year following calibration at temperatures between 18 and 28°C and at up to 80% humidity. Fuse: F 200 mA / 250 V Battery: 9V battery Display: 3 1/2 digit, 15 mm high LCD 2-3 updates / sec.
- Page 3 - 3 - DC current 20 µA 0.01 µA +/-(1% +/-2 dgts) 200 µA 0.1 µA +/-(1% +/-2 dgts) 2 mA 1 µA +/-(1% +/-2 dgts) 20 mA 10 µA +/-(1% +/-2 dgts) 200 mA 100 µA +/-(1.5% +/-2 dgts) 10 A 10 mA +/-(3% +/-2 dgts)
- Page 4 - 4 - If you switch from one measuring range to another whilst measurement is in progress, voltage peaks might occur and damage the instrument. If the voltage exceeds 60 V three-phase or 25 V AC, it is important to take particular care as there is a risk of electric shock.
- Page 5 - 5 - - Replace the battery with another one of the same type (9V battery). Be careful to connect the leads the right way round. Always close up the housing carefully and tighten all the fastening screws before starting to use the multimeter again. Use a damp cloth and a mild cleaning agent to clean the device.
- Page 6 - 6 - measuring range and then reduce it as required. If any measured value appears on the display although the test probes have not yet been connected to the object, this can be attributed to the sensitivity of the measurement input and of no importance.
- Page 7 - 7 - 2. Select 200 ohms as the measuring range, hold test probes close together in order to check the test cable for continuity. The unit should be displaying 0.1 to 0.3 ohms. Now choose the measuring range for the test object (see A. 2.). 3.
- Page 8 - 8 - When you perform these procedures yourself, be sure to always follow the safety instructions for using the unit (see user instructions); model-specific details and target measurement values can be found in the repair and maintenance manual for your particular vehicle. While we have carefully researched all the instructions and reviewed them several times, you will understand that we accept no liability.
- Page 9 - 9 - to 15.5 volts when the engine speed is increased, this indicates that the voltage regulator/rectifier is not limiting the voltage correctly. Measurable short-term voltage peaks indicate a fault in the rectifier and/or the alternator. 1.2 Testing a star alternator with a permanent magnet rotor Star alternators operate with a permanent magnet rotor that induces a voltage by turning in the windings of the outer stator.
- Page 10 - 10 - while a measured value of 0 would indicate a short circuit. In both cases the stator would be faulty. If the AC voltage at the alternator is considerably too low despite the fact that the alternator windings are undamaged, it can be assumed that the rotor is demagnetised.
- Page 11 - 11 - Testing the regulator/rectifier: as described in 1.2 If you intend to test your separate collector alternator thoroughly it is advisable to remove it from the bike (first disconnect the battery) and then dismantle it. Then check the contact pressure of the brush springs and the length of the carbon brushes and replace them if necessary.
- Page 12 - 12 - 6 ohms). If it is approaching zero, there is a short circuit, and if it is large there is a break in the winding. The resistance measured to earth, on the other hand, must be infinite. 2. Checking the ignition circuit of a battery coil ignition 2.1 Ignition coils If ignition sparks are either weak or non-existent, start with a visual inspection of the cable connections and spark plug.
- Page 13 - 13 - components as far as possible, apply a little contact spray and then measure again. The ignition coil itself can be tested with the multimeter for line break and short circuit but not for interturn faults or disruptive discharges at high voltage. There is another factor to consider, namely that ignition coils frequently do not start to malfunction until a certain operating temperature has been reached.
- Page 14 - 14 - 3. Testing the starter circuit 3.1 Starter relay The purpose of the starter relay is to reduce load on the cabling and switches in the starter circuit. To test it, first disconnect the thick cable leading to the starter. Insert the red test cable in the VΩmA jack and the black cable in the COM jack on the multimeter, select measuring range 200 ohms and perform continuity test (see above).
- Page 15 - 15 - to zero indicates a short circuit while too high a resistance indicates a line break requiring the rotor to be replaced. Now select measuring range up to 2 MOhm on the multimeter. Hold the red test probe against each commutator bar and the black one against the axle (earth).
- Page 16 - 16 - range 20 V DC on the multimeter. Disconnect positive and negative leads from the consumer and hold the black test probe against the negative and the red one against the positive lead. The measurable voltage should be 12 volts – readings below this suggest energy losses.
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