23
Tach (rotation speed)
Number
of Cylinders
Range
The Highest
Resolution
Accuracy
2 cylinders
250RPM
-
40kRPM
1RPM ± (2.0% + 5)
3 cylinders
4 cylinders
5 cylinders
6 cylinders
8 cylinders
Vehicle’s Battery Internal Resistance
Range Resolution Accuracy Test Signal
400mΩ 0.1mΩ
± (5% +
10)
about 1kHz,
50mA
4000mΩ 1mΩ
Note:
1. Do not attempt to test a battery whose voltage exceeds 36V.
2. The resistance of each test lead C with clip ) must be less
than 5Ω
Overload Protection: Fuse, 400mA/690V, Fast action
Note: For4-strokeengine:actualrotationspeed=reading
For2-strokeengine:actualrotationspeed=50%ofreading
Measurement Range: 3V peak -50V peak
Overload Protection: 250V DC/AC rms
Diode and Continuity
Range Description
Test Condition
The approx. forward
voltage drop
of the diode will be
displayed.
OpenCircuit
Voltage:
about 3V
The built-in buzzer
will sound if the
resistance is less than about
30Ω .
OpenCircuit
Voltage:
about -1.2V
Overload Protection: 250V DC/AC rms
Temperature
Range Resolution Accuracy
-20° C
~1000 C
1° C
-20° C ~ 0° C: ± (6.0% + 5)
0° C ~ 400° C: ± (1.5% + 5)
> 400° C: ± (1.8% + 5)
-4° F
~1832° F
1° F
-4° F ~ 32° F: ± (6.0% + 9)
32° F ~ 752° F: ± (1.5% + 9)
> 752° F: ± (1.8% + 9)
Overload Protection: Fuse, 400mA/690V, Fast action
Note:
1. The above accuracy does not include error of the thermocouple probe.
2. Accuracy specification assumes ambient temperature stable to ±1C°.
For ambient temperature changes of ±5 C°, rated accuracy applies after
1 hour.
Duty Cycle
Range Resolution Accuracy
5% ~ 95% 0.1% ± (2.5% + 5)
Measurement Range: 3V peak -50V peak
Frequency Range: 10Hz -10kHz
Overload Protection: 250V DC/AC rms
Dwell Angle
Number
of Cylinders
Range
Resolution Accuracy
2 cylinders 0 - 180°
0.1° ± (2.0% + 5)
3 cylinders 0 - 120°
4 cylinders 0 - 90°
5 cylinders 0 - 72°
6 cylinders 0 - 60°
8 cylinders 0 - 45°
Measurement Range: 3V peak -50V peak
Rotation Speed of Engine: 250RPM-40kRPM
Overload Protection: 250V DC/AC rms