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Decade Series 1412 Capacitor
USES:
· Verification of Calibration of LCR
Stable Polystyrene Decade Capacitor
Meters
· Capacitance Measurement Functions
Introduction
· Verification of Calibration of
Multimeters Model 1412-BC: The wide capacitance range and high resolution of this
decade capacitance box make it exceptionally useful in both laboratory and
· For Calibrating Instrumentation test shop. Owing to its fine adjustment of capacitance, it is a convenient vari-
able capacitor to use with an impedance comparator. The polystyrene dielec-
tric used in the decade steps is necessary for applications requiring low dielec-
FEATURES: tric absorption and constancy of both capacitance and dissipation factor with
· 50pF to >1 uF frequency.
· Better than l pF resolution
· Accuracy of +/-(0.5% +5pF)
Description
Four decades of polystyrene capacitors and a variable air capacitor are used,
· Low loss, leakage, dielectric absorption
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 C of 100pF and a reso-
lution of better than l pF provides continuous adjustment between the 100pF
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 difference
between the 3-terminal and 2-terminal
capacitance of the box; C LG is approx.
125 pF.
HIPOT · LCR METERS · MEGOHMMETERS · MILLIOHMMETERS · DECADES · STANDARDS
For more information about special
purchase, rent & lease options, call
IET LABS, INC.
Formerly manufactured by QuadTech
& GenRad (General Radio)
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
Series 1412-BC Decade Capacitor
Capacitance: 50pF to 1.11115µF in steps of 100pF with a 0 to 100pF variable air capacitor providing continuous adjustment
with divisions of l pF. Capacitances for 2- and 3-terminal connections differ by about 1 pF(CHC in Figure 1 )
C LC is approximately 125pF.
Minmum Capacitance: 50pF with all controls set at zero.
Dielectric: Polystyrene for decade steps.
Accuracy: +/-(0.5% +5pF) at 1 kHz for total capacitance including 50pF minimum for the 3-terminal connection.
Temperature Coefficient of Capacitance:
-140ppm/°C (nominal).
Frequency Characteristics:
DC Cap/ 1kHz Cap <1.001. At higher frequencies the increase is approximately DC/C = (f/fr)² The resonant
frequency, fr , varies from over 400kHz for a capacitance of 1µF to 27MHz for a capacitance of 150pF when
connections are made to the front terminals. fr is about 300kHz and 70MHz for rear connections and the
same capacitance.
Max Operating Temperature:
65°C.
Dielectric Absorption: (Voltage Recovery): 0.1% max.
Dissipation Factor: 150 to 1000pF, 0.001 max, at 1kHz; over 1000pF, 0.0002 max, at 1kHz
Insulation Resistance: 101 2V min.
Max Voltage: 500V peak, up to 35kHz.
Terminals: Four binding posts with grounding link are provided on the 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 applications.
Mechanical: Lab-bench cabinet; brackets provided for rack mount.
Dimensions: (w x h x d): 17.25 x 3.5 x 6in (439 x 89 x 153mm).
Weight: 8.5 lbs.(3.9kg) net, 10 lbs. (4.6kg) shipping..
Ordering Information
1412-BC Decade Capacitor Includes:
Calibration Certificate Traceable to NIST
Catalog Number Item
1412-9410 1412-BC Decade Capacitor
Optional Accessories:
Calibration Data
IET LABS, INC.
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de