GENERAL RADIO COMPANY 1650-B User manual

DANCE

INSTRUCTION MANUAL
IMPEDANCE BRIDGE
Form 165@012@A
ID-0100
April,
1968
GENERAL RADIO
West Concord, Massachusetts
Copyright 1968, General Radio Company

Specifications
RANGES OF MEASUREMENT ACCURACY
t Bridge operates up to 100 kHz with reducedaccuracy.
GENERAL Accessories Required: None. Earphones can be used for high
Generator: Internal;
1 kHz 22%. Type 1310 or 1311 Oscillator precision at extremes of bridge ranges.
recommended if external generator is required. Internal dc sup-
~~~~~~~~i~~ ~~~il~bl~: T~D~ 1650-P1 ~~~t jig.
Residuals
=0.5 pF
= 0.2 pH
=lmR
. .
ply, 6 V, 60 mA, max. Mounting: Flip-Tilt Cabinet.
Detector: Internal or external; internal detector response flat or
selective at
1 kHz; sensitivity control provided. Type 1232-A
Dimensions (width x height x depth): Portable, 13 x 6Y4 x 121/4 in.
Tuned Amplifier and Null Detector is recommended if external
(330 x 175 x 315 mm); rack, 19 x 121/4 x 4% in. (485 x 315 x
detector is required. Combination of
1311 oscillator and 1232 de-
105 mm).
tector is available as the Type 1240 Bridge Oscillator-Detector. Net Weight (est): Portable,
17 Ib (8 kg); rack, 18 Ib (8.5 kg).
DC
I%, 1 R to 100 kR, ext supply or
detector required
>I00 kR and
<l R.
tl%, 10 micromhos to 1 mho,
ext supply or detector requ~red
<10 micromhos.
Capacitance
1 pF to 1100 pF, series or
parallel,
7 ranges
Inductance
1 pHto 1100 H, series or
parallel,
7 ranges
Resistance
ac or dc,
1 mR to 1.1 MR,
7 ranges
Conductance
ac or dc,
1 nanomhoto 1.1
mhos, 7 ranges
--
Dissipation Factor, D, at 1 kHz,
0.001 to 1 of series C,
0.1 to 50 of parallel C.
Storage Factor,
Q, at 1 kHz,
0.02 to 10 of series L,
1 to 1000 of parallel L.
DC Polarization: Capacitors can be biased to 600 V from external Shipping Weight (est): Portable,
21 Ib
kg); rack, 30 Ib (13,5 kg),
dc power supply for series capacitance measurements.
Power Required:
4 size-D cells, supplied. Patent Nos D 187,740 and 2,966.257.
20 Hz to 20 kHzt
21% 21 pF
21% 21 pH
21% rl mR
?l0h 21 nanomho
25% r0.001 at
1 kHz and lower
1 - accurate to
Q
25% 20.001 at
1 kHz or lower
Condensed Operating Instructions
A step-by-step procedure for the 1650-8 Bridge operation
is given in the operations chart inSection
2. For your conven-
ience, the chart has been reproduced and included inside the
flip-tilt cabinet of the instrument.
NOTE: This instrument is equippedwith our new snap-on knob for added
convenience and safety. Refer to the Service Section for details.

Contents
Section 1 -Introduction Section 4-Accuracy
............
1.1 Description 1-1
1.2
Opening and Tilting the Cabinet ..... 1-1
1.3
Power Supply ........... 1-1
1.4
Symbols. Abbreviations. and Definitions . . 1-2
1.5
SeriesandParallelComponents ..... 1-2
...... 1.6 Portable-to-Rack Conversion 1-3
1.7
Connections ........... 1-4
Section 2-Basic Measurements
2.1 General ............. 2-1
2.2
DC and AC Sensitivity ........ 2-4
2.3
DC Voltage and Current Limits ..... 2-4
2.4
Connection of External Generator .... 2-6
2.5
MaximumAppliedACVoltage ..... 2-6
2.6
Operating Procedurewith Orthonull ... 2-7
Section 3-Special Measurements
3.1 General ............. 31
3.2
Application of DC Bias toCapacitors ... 3-1
3.3
Application of DC to Inductors ..... 3-2
3.4
DC Bias for AC Resistance Measurements . . 3-4
3.5
Measurement of AC Resistance or
.... Conductancewith Reactance 35
3.6 Measurement of Transducers ...... 3-5
3.7
Resonant Frequency of Tuned Circuits . . 3-6
...
3.8 Shielded ThreeTerminal Components 3-6
3.9
Remote Measurements ........ 3-6
3.10
Measurement of Grounded Components . . 37
3.1 1
Use of the Type 165Q.Pl Test Jig .... 37
...........
3.12 LimitTesting 37
1 General .........
4.2 DC Resistance .......
4.3 AC Resistance .......
4.4 Inductance ........
4.5 Capacitance .......
4.6 Effects of Capacitanceto Ground
.....
4.7 D and Q Accuracy
4.8 Orthonull Accuracy .....
4.9 D and Q Rangesvs Frequency .
4.10 Correctionsfor Residuals ...
....
4.1 1 Operation below 1 kHz
....
4.12 Operation above 1 kHz
Section 5-Principles of Operation
5.1 General .........
5.2 1650 Bridge .......
Section 6-Service and Maintenance
6.1 Warranty ........
6.2 Service .........
6.3 Minimum PerformanceStandards
6.4 Trouble Analysis ......
6.5 Repair Notes .......
6.6 Calibration Procedure ....
6.7 Knob Removal ......
6.8 Knob Installation ......
Parts Lists and Diagrams .......
Appendix

BIAS jack.
Voltage bias for capacitors: Apply biasonly if PARAMETER switch is in
Cs position. For Cp,.refer to Section 2. Max voltage is 600V dc. Add a
resistor as a current l~m~terto prevent short circuit.
Current bias for inductors: Apply bias only if PARAMETER switch is in GENERATOR switch.
Lp position. For L,, refer toSection 2.
Turns bridge on, selects internal or external
\
/ generator, ac or dc, checks battery.
\ Internal OSCillator LEVEL control. /
UNKNOWN terminals.
PARAMETER switch.
OPP ARM jack.
Connect external
decade capacitor
for reactive bal-
ance of resistors.
external amplifier
or earphones for
additional sensiti-
Ground. -/.d
MULTIPLIER switch.
- Multiply CGRL dial setting by
switch range for result.
' DETector SENSitivity control.
accuracy, choose MULTIPLIER
ting for balance between
1 and set-
10.
vity or selectivity. DO dial.
OR THO NULL^ switch.
When set to IN, clutch engaged between
/
EXTernal DO jack.
Useful for extending DOrange with
a decade box.
EXTernal GENerator jack.
Max power:
0.05 W.
Max voltage:
500 V dc; or f- V ac rms where f is in Hz, or 100 V ac rms,
5
two main dials, false nulls are avoidedand
balance is faster for high
D and low Q
measurements. Switch to INwhen CGR L
and DO dials are both in white sectors.
-
whichever issmaller.
Frequencyrange for L and C:
20 Hz to 20 kHz.
Figure 1 - 1. Type 1650-B Impedance Bridge.