DAYTRONIC CORPORATION
Model 3140A Frequency Conditioner
Instruction Manual
The Model 3140A Frequency Conditioner accepts any type of AC or pulse input
signal, irrespective of waveform. It produces a standard five-volt analog
output, with low-pass corner frequency of 2 or 10 Hz, depending on the input
frequency range selected. This output is precisely proportional to the fre-
quency of the source.
I. Specifications: Table 1
Input Type: Any AC signal, single-ended or differential, irrespective of
waveform.
Input Sensitivity: Continuously adjustable from 0.1 to 200 V via front-
panel control. Input Sensitivity decreases above 10 KHz by
0.01 V/kHz to 0.5 V at 50 kHz.
Input Threshold Level: Automatic triggering of squarer at 75 and 25
percent of the input amplitude.
Input Frequency Ranges: Full-scale frequency ranges are selected with
internal switches. Ranqe switches of 100, 1000, and 10000 and
Multiplier switches of xl, x2, and x5 provide nine frequency ranges
(see Table 2).
Analog Output: 0 to ±5 V, with 50% overrange, 5 mA max. Active low-
pass filtering provides for rolloff of 60 dB per decade above corner
frequency. Corner frequency is 2 Hz for input ranges of 100, 200, and
500 Hz; it is 10 Hz for all other ranges (1000 to 50000 Hz).
Output Ripple and Noise: Less than 0.1% of full scale from 20 to 100% of
the selected range.
Step-Function Response: Response time (to 99.9% of final value) is 1.8
seconds for 100-, 200-, and 500-Hz ranges, and 350 milliseconds for all
other ranges.
Accuracy: 0.05% of full scale.
Dimensions: 1.7 x
4.41 x 8.5 (HWD inches).
Operating Temperature Range: 0 to +130 degrees F.
Power Requirements: 105 to 135 W-AC, 50 to 400 Hz at 5 W max.
The Model 3140A is also available in two other forms. The Model 3240A
contains a Digital Indicator to display the analog output. The Model
3340A is identical to the 3240A, except that it also includes high-low
limit monitoring. See separate Model 3200/3300 and Model 3300 Instruction
Manuals.
II. Installation and Cabling
1. MOUNTING: 3000 Series instruments can be operated as bench-top, rack-
mounted, or panel-mounted units. See Fig. 1. Up to four 3000 Series in-
struments can be mounted in a standard 19-inch rack, using the 1-3/4"
high Model 3004 Adaptor. The following reassembly procedure lets you
quickly mount any 3000 Series unit in your own precut panel (see cutout
dimensions in Fig. 1C).
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General