Analog Peak Capture: Positive analog peak with minimum full-scale input pulse
duration of 15 msec (to 1% of full-scale accuracy), 25 msec (to 0.1% of full-scale
accuracy), and 35 msec (to 0.02% of full-scale accuracy); digitally held for indefi-
nite display; PEAK and TRACK modes controlled by front-panel button, rear-panel
logic input, or computer-port command
Internal 15-Segment Linearization, programmable from front panel
Analog Output: Range scalable in 0.1% increments between 74.5% and 125.5% of
nominal input. May be sourced by conditioned input (A) after the FIXED ANALOG
FILTER; (B) after PEAK CAPTURE; or (C) after the SELECTABLE ANALOG FILTER
(see Fig. 15, Section 2.d)
Frequency Characteristics and Step-Response Settling Times:
AFTER THE FIXED ANALOG FILTER and AFTER +PEAK IN "PEAK" or
"TRACK" MODE: 3 dB down at 100 Hz; 60 dB down at 750 Hz. Settling Time
to 1% of final value: 15 msec; to 0.1% of final value: 25 msec; to 0.02% of final
value: 35 msec
AFTER THE SELECTABLE ANALOG FILTER: See "Analog Filtering for Dis-
played Reading" for the Model 3530, above
Configuration: Single-ended, return to SYSTEM COMMON
Full-Scale Range: ±5 V nominal, ±8 V maximum
Offset Range Adjustment: ±25.5% in 0.1% increments
Allowable Loading: 5 mA, max.
Offset Accuracy: 0.1% max
Span Accuracy: 0.2% max
Offset and Span Drift: ±50 ppm/°C; ±20 ppm/month
A.2.c MODEL 3540 FREQUENCY INPUT CONDITIONER
Input Type: Any AC or unipolar pulse signal, grounded or floating, irrespective of
waveform
Frequency Range: From 10% to 100% of 250, 500, 1000, 2000, 4000, 8000, 16000,
or 32000 Hz
Threshold Level: Selectable to accommodate signals from 100 mV to 100 V
Excitation (for "Zero-Velocity" sensors): Nominal 10 (i.e., ±5) V-DC ± 5%; ±50 mA
maximum
Normal-Mode Range: ±100 V operating, ±150 V without instrument damage
Common-Mode Range: ±100 V operating and without instrument damage
Common-Mode Rejection Ratio: -120 dB at 60 Hz; -60 dB at 1 kHz
Input Impedance: Normal-Mode: 200 kΩ; Common-Mode: 50 kΩ
Offset: Initial: ±0.05% of full scale; vs. Temperature: ±25 ppm/°C; vs. Time: ±20
ppm/month
Gain Accuracy: ±0.02% of full scale
Gain Stability: Vs. Temperature: ±40 ppm/°C; vs. Time: ±20 ppm/month
Analog Filtering for Displayed Reading: 5-pole filter with selectable low-pass
corner frequency of 2.5, 5, or 10 Hz
A.4
A
3500 SERIES SPECIFICATIONS
A.2 INDIVIDUAL CONDITIONER SPECIFICATIONS: MODEL 3540
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