Toyo Keiki DVF-11M DC Ammeter Moving-coil Type

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Toyo Keiki DVF-11M DC Ammeter Moving-coil Type

Toyo Keiki

Product Made In Japan
Manufacturer: Toyo Keiki
Model: DVF-11M

Features

1. A long scale meter for indicating wide angles.
2. A stepped scale plate removes any level difference between the scale and the tip of the needle, resulting in accurate readings.
3. Meter that has a bright scale due to the wide-cover lighting surface.
4. It is not affected by steel panels.
5. Can be manufactured with EL board (Electro-Luminescence Board) lighting.
6. The terminal cover is now equipped as standard.
7. It is now compatible with multi-setting set pointer models.

Specifications

Measurement Range Value	DVF-11M
Measurement Range Value	Internal Resistance	Distributor
200 pA	1.9 kQ 1.1 kQ 380 Q 125 Q 21 Q 8 Q 3 Q	Not Required
500 pA
1 mA
2 mA
5 mA
10 mA
20 mA
50 mA	Voltage drop: WOmV Sensitivity: Approx. 10mA
100 mA
500 mA
1 A
5 A
10 A
15 A
20 A
30 A		Built-in
40 A – 5 kA	Voltage drop: 60mV Sensitivity: Approx. 10mA	External
Weight	Approx. 0.45kg

Remarks

Connection to Shunt

1. Connect the shunt to the wires on the earth side.
2. Instrument Lead : Instrument lead is not included.

Instrument Lead Resistance

1. Meters externally attached to shunts are normally adjusted to an instrument lead resistance of 0.05Ω. (Indicate LEAD 0.05Ω on the scale plate)
Therefore, use wiring that is equivalent to 0.05Ω for the instrument lead.
2. Please provide separate instructions if the instrument lead resistance is to be a value other than 0.05Ω. When combining with a 60mV rated shunt, the instrument lead resistance can be manufactured up to 1.0Ω specifications.
If the wiring exceeds 1.0Ω, combine with a high mV shunt.
3. If the instrument lead resistance is not clearly specified, the meter can be manufactured with a sensitivity adjustment variable resistor (VR). The adjustable range is up to 1.0Ω for a 60mV meter.
Note) The model name of an meter equipped with VR is the same as the normal model name with V appended.
E.g. DVF-11MV

Note: Zero center meters and multiple-scale meters can also be manufactured. 50mV and 100mV meters with externally attached shunts can also be manufactured.

Reference Table of Instrument Lead Resistance

Wire Diameter/ Length	1 m	2 m	3 m	4 m	5 m	10 m	20 m	Conductor Resistance Ω/m (unit Ω at 20°C)
0.75 mm²	0.05	0.1	0.15	0.2	0.25	0.5	1.0	24.4
1.25 mm²	0.03	0.06	0.09	0.12	0.15	0.3	0.6	14.7
2.0 mm²	0.02	0.04	0.06	0.08	0.1	0.2	0.4	9.50
3.5 mm²	0.01	0.02	0.03	0.04	0.05	0.1	0.2	5.09
5.5 mm²	0.0066	0.0132	0.0198	0.0264	0.033	0.066	0.132	3.27

**Note:**
1. The resistance values in the table above are applicable when the prescribed length of vinyl wire for wiring electric devices is installed as return wiring.
2. If the wiring exceeds 20m, calculate from the conductor resistance value column. E.g. For 2.0mm² 36m, 2×9.50×0.036=0.68Ω