Product Made In Japan
Manufacturer: Toyo Keiki
Model: CF Series

Remarks

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 for the specified meter. (Indicate LEAD 0.05Ω on the scale plate)
Note) Use wiring that is equivalent to 0.05Ω for the wiring of the instrument lead.
2. Please specify separate instructions if the instrument lead resistance of the specified meter is to be a value other than 0.05Ω. (Instrument Lead Resistance: Can be manufactured up to 1.5Ω…However, use a meter with both a voltage drop and shunt of 100mV for 1Ω or more.)
3. If the instrument lead resistance is not clearly specified, the meter can be manufactured with a sensitivity adjustment variable resistor (VR).
Note1) The model name of a meter equipped with VR is the same as the normal model name with V appended. E.g. DCF-12NV
2) DCF-5 meters equipped with VR cannot be manufactured.

Connection to Shunt

1. Connect the shunt to the wires on the earth side.

Note

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

Note Table of Instrument Lead Resistance

WireDiameter	1m	2m	3m	4m	5m	10m	20m	Conductor Resistance Q/km
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 indicated 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.

Specification

Measurement Range Value	DCF-5		DCF-6		DCF-8		DCF-10		DCF-12N
	Internal Resistance	Shunt	Internal Resistance	Shunt	Internal Resistance	Shunt	Internal Resistance	Shunt	Internal Resistance	Shunt
50 pA 100 pA 200 pA 500 pA 1 mA 2 mA 5 mA 10 mA 20 mA 50 mA 100 mA 500 mA 1 A 5 A 10 A 15 A 20 A 30 A 50 A ~ 15 kA	–	–	12500 (taut band) 8300 (taut band) 835 Q 600 Q 65 Q 25 Q 5 Q 5 Q 3 Q	Not Required	12500 (taut band) 8300 (taut band) 835 Q 600 Q 65 Q 25 Q 5 Q 5 Q 3 Q	Not Required	23500 (taut band) 10100 (taut band) 900 Q 900 Q 200 Q 50 Q 6 Q 5 Q 4 Q	Not Required	23500 (taut band) 10100 (taut band) 900 Q 900 Q 200 Q 50 Q 6 Q 5 Q 4 Q	Not Required
	1000 Q 500 Q 100 Q 32 Q 5 Q 5 Q 3 Q	Not Required
	Voltage Drop :60mV Sensitivity : Approx. 6mA	Built-in	Voltage Drop :60mV Sensitivity : Approx. 6mA	Built-in	Voltage Drop :60mV Sensitivity : Approx. 6mA	Built-in	Voltage Drop :60mV Sensitivity : Approx. 5mA	Built-in	Voltage Drop :60mV Sensitivity : Approx. 5mA	Built-in
		External		Back-mounted Note 2		Back-mounted Note 2		Back-mounted Note 2		Back-mounted Note 2
				External		External		External		External
Weight	Approx. 0.06kg		Approx. 0.09kg		Approx. 0.1kg		Approx. 0.12kg		Approx. 0.15kg

Reception Meter Meter Input	DCF-5		DCF-6		DCF-8		DCF-10		DCF-12N
	Internal Resistance	Shunt	Internal Resistance	Shunt	Internal Resistance	Shunt	Internal Resistance	Shunt	Internal Resistance	Shunt
4~20mA	3Q	Not Required	3Q	Not Required	3Q	Not Required	3Q	Not Required	3Q	Not Required
Weight	Approx. 0.06kg		Approx. 0.09kg		Approx. 0.1kg		Approx. 0.12kg		Approx. 0.15kg

Note 1. Intrinsic error of the internal resistance value is ±30% (at 23°C).
Note 2. Terminal cap is not included. (Optional) Specify if required

Outside Dimensions

DCF-5

DCF-6

DCF-8

DCF-10

DCF-12N

Note 1) Resistor for sensitivity adjustment is included with DCF-6V, DCF-8V, DCF-10V and DCF-12N models only.
Note 2) DCF-6, DCF-8, DCF-10, DCF-12N models 15 – 30A meters have a back-mounted shunt as shown in the figure on the left. (however, a terminal cap is not included.)

Connection Diagram