Dranetz Engineering Laboratories Inc. 305C Level Meter
If you have any other photos or manuals for the
Dranetz Engineering Laboratories Inc. 305C you can upload the files here .
Model 305 Phasemeter (figure 1-1) represents a totally
new concept in the measurement of phase angle. A precision
phase angle measurement is obtained simply by connecting the
signals and reading the display. No adjustments are required
during normal use. Model 305 senses the signal frequency and
adjusts its output time constant for maximum speed
commensurate with low ripple. It remains operational in the
presence of up to 10% high frequency noise. Model 305
sensitivity to waveform distortion is reduced over that of
other phasemeters which normally require filters to remove
1-5. The use of the automatic dual mode switching allows for
continuous phase plotting between <-160° to > +340° with no
discontinuities. The front panel controls on Model 305 main
frame are used only for self checking of the main frame and
calibration of remotely connected Accessories
such as a
recorder or printer.
1-6 . Standard Plug-In
units covering a frequency range
of 1 Hz to 11 MHz are available with Model 305 Phasemeter.
units are available on request.
1-7. SPECIAL FEATURES
1-8. Model 305 provides special features when used with
Model 305-PA-3001 or 305-PA-3002.
a. No operating controls.
b. Excellent stability -~ no operating adjustments.
c. 0.05° accuracy independent of input voltage.
d. Versatile Plug-In
e. Basic frequency range: 2 Hz to 700 kHz (extendable to I
Hz or 11 MHz with other plug-ins).
f. Digital readouts on Models 305B, 305C and 305D.
g. Digital outputs on Models 305B, 305C and 3&5D-for use
with printers, etc.
h. 1 Megohm input impedance.
i. Levels extendable to 40 KV using Tektronix
j. Indicator lights on each input to indicate either low or
high input levels (305-PA-3001 only).
k. High overvoltage capability.
Service and User Manual
6.32 Mbytes (6629316 Bytes)
Scanned document, reading partly badly, partly not readable.
11 August 2017
X GENERAL INFORMATION 1-1
1-1 Introduction 1-1
1-3 Purpose 1-1
1-7 Special Features 1-1
1-9 Equipment Characteristics and
Series 305 Configuration 1-2
II OPERATION 2-1
2-1 General 2-1 2-3 Controls, Connectors and Indicators
2-1 2-5 Unpacking 2-1 2-7 Operation 2-1 2-10 Main Frame Rear
2-12 Operation of model 305
With Option 107 2-11 2-15
Additional Operating Features of
Model 305D 2-12
2-17 Operation 2-12
III PERFORMANCE CHECK 3-1
3-1 General 3-1
3-3 Test Equipment Required 3-1
3-5 Main Frame Calibration 3-1
3-6 Minimum Performance Check 3-4
3-11 Field Installation of 305 Series
IY THEORY OF OPERATION 4-1
4-1 General 4-1
4-3 Basic Operation of 360 Zero Crossing
Phase Meters' 4-1
4-9 Block Diagram Discussion 4-2
Y MAINTENANCE 5-1
5-1 General 5-1 5-6 Mechanical Disassembly Procedure 5-2 5-8
Circuit Description 5-5 5-10 Model 305-PA-3001
Plug-In 5-5 5-36 model 305
Main Frame Control Circuits 5-9
5-49 Model 305D
Offset and Null Circuits 5-11 5-54 Series
305 Dual Power Supply 5-11 5-61 Selected Components 5-13
6-4 Equipment Required
6-5 Equipment Setup
6-6 Test Procedure
6-9 Adjustment Procedure for Option 107
6-11 (Card All) Adjustment Procedure for 305D
6-13 Circuits Adjustment Procedure (Model 305-PA-3001
6-20 In Main Frame) Adjustment Procedure (Model 305~PA-3002
In Main Frame) REPLACEABLE PARTS LIST
8-3 Option 101
8-6 Option 102
8-10 Remote Operation
8-18 Additional Operating Control Infor-
8-21 mation for Remote Operation of Automatic Calibration
When Option 107 is Used Option 103
8-28 Option 105
8-31 Option 107