1412 IET | Alldatasheet
Document overview
- Manufacturer or author: IET labs inc.
- PDF pages: 2
Technical content
DESCRIPTION
IET LABS, INC. in the GenRad Tradition www.ietlabs.com TEL: (516) 334-5959 EMAIL: info@ietlabs.com
1412 Series Page 1 of 2
1412 Datasheet April 2020
Features:
- Verifi caƟ on and calibraƟ on of LCR meters
- Capacitance measurement funcƟ ons
- Verifi caƟ on and calibraƟ on of mulƟ meters
- 50 pF to > 1 μF
- BeƩ er than 1 pF resoluƟ on
- Accuracy of ± (0.5% + 5 pF)
- Low loss, leakage, dielectric absorpƟ on The wide capacitance range and high resoluƟ on of this decade capacitance box make it excepƟ onally useful in both laboratory and test shop. Owing to its fi ne adjustment of capacitance, it is a convenient variable capacitor to use with an imped- ance comparator. The polystyrene dielectric used in the decade steps is necessary for applicaƟ ons requiring low dielectric absorpƟ on and constancy of both capacitance and dissipaƟ on factor with fre- quency. Model 1412-BC Decade Capacitor For decades of polystyrene capacitors and a variable air capacitors are used, mounted in a double-shield box. The double shielding provides 2-terminal and 3-terminal capacitance’s that are the same except for the capacitance between the terminals. The variable air capacitor with a linear ΔC of 100 pF and a resolution of better than 1 pF provides continuous adjustment between the 100 pF steps of the smallest decade. Figure 1 The double shielding used in the 1412-BC Decade Capacitor keeps C HG very small. This capacitance is the diff erence between the 3-terminal and 2-terminal capacitance of the box; CLG is approximately 125 pF.
ORDERING INFORMATION
IET LABS, INC. in the GenRad Tradition www.ietlabs.com TEL: (516) 334-5959 EMAIL: info@ietlabs.com
1412 Series Page 2 of 2
Capacitance: 50 pF to 1.11115 μF in steps of 100 pF with a 0 to 100 pF variable air capacitor providing continuous adjustment with divisions of 1 pF. Capacitance for 2- and 3-terminal con- nections diff er by about 1 pF (CHG in Figure 1) CLC is approximately 125 pF. Minimum Capacitance: 50 pF with all controls set at zero. Dielectric: Polystyrene for decade steps. Accuracy: ±( 0.5% + 5 pF) at 1 kHz for total capacitance including 50 pF minimum for the 3-terminal connection. Temperature Coeffi cient of Capacitance: -140 ppm/°C (nominal). Frequency Characteristics: DC Cap/ 1 kHz Cap < 1.001. At higher frequencies the increase is approximately ΔC/C = (ƒf /ƒf r )². The reso- nant frequency, ƒf r, varies from over 400 kHz for a capacitance of 1 μF to 27 MHz for a capacitance of 150 pF when connections are made to the front termi- nals. ƒf r is about 300 kHz and 70 MHz for rear connections and the same capacitance. Max Operating Temperature: 65°C. Dielectric Absorption: (Voltage Recovery): 0.1% max. Dissipation Factor: 150 to 1000 pF, 0.001 max, at 1 kHz; over 1000 pF, 0.0002 max, at 1 kHz. Insulation Resistance: 10 12 Ω minimum Max Voltage: 500V peak, up to 35 kHz. Terminals: Four bindings posts with grounding link are provided on the front panel. Two of the binding posts are connected to the case and located for convenient use with patch cords in 3-terminal applications. Access is also provided to rear terminals for relay-rack application. Mechanical: Lab-bench cabinet; brackets pro- vided for rack mount. Dimensions: 0.89 cm H x 43.9 cm W x 15.3 cm D Weight: 3.9 kg (8.5 lb.) net 4.6 kg (10 lb.) shipping. 1412-9410 1412-BC Decade Capacitor Includes: Certifi cate of Calibration Instruction Manual