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The Model 3560 Voltage Conditioner is a general-purpose instrument for conditioning, displaying, and monitoring the signal received from a DC-to-DC LVDT, potentiometer-type sensor, or other external two-wire voltage source, either floating or grounded.  The input signal may also represent output from some other instrument or instrument system.  ±12 V excitation is supplied for sources that require it.

Differential inputs, generous common-mode range, and excellent common-mode rejection eliminate ground-coupling errors and other problems normally associated with off-ground signal sources.  Chopper-stabilized DC amplification with active low-pass filtering yields smooth and stable measurement of the true average value of the input variable, even in the face of substantial dynamic content.

Simple two-point "zero and span" calibration is provided for applications where the measured quantity is an analog of the received voltage input.  For direct voltage measurements, no calibration is required.

The 3560 offers all standard 3500 Series features, including

	selectable digital smoothing
	custom 15-segment linearization
	HI/LO limit monitoring with logic I/O
	scalable analog output
	analog +peak capture
	automatic tare offset
	digital track and hold
	either single-node (RS232) or multinode network (RS485) communications

The instrument can be completely set up and operated either through the front-panel keypad or via simple mnemonic commands received from an external computer or terminal through the RS232/RS485 Interface Port.

For typical 3560 operations, see the following applications:

	Smoke Stack Flow Monitoring (employs a multidrop network of 3560 units)
	Monitoring Height of Relay Contact

Voltage Conditioner Specifications  [Top ] (Click here for 3500 Series General Specifications; see also the statement on Daytronic accuracy specifications)
Input Type	2-wire DC voltage source, floating or grounded
Input Ranges (full-scale)	±0.5, ±1.0, ±2.0, ±5.0, ±10.0, and ±20.0 VDC
Excitation Supplied	±12 VDC ± 5%; ±50 mA maximum
Common-Mode Range	±50 V operating; ±100 V without instrument damage
Common-Mode Rejection Ratio	-70 dB at DC; -90 dB at 60 Hz and 3 kHz; -80 dB at 1 kHz
Input Impedance	Differential: 200 kΩ Common-Mode: 50 kΩ
Offset	Initial: ±0.02% of full scale Vs. Temperature: ±25 ppm/°C Vs. Time: ±10 ppm/month
Gain Accuracy	±0.02% of full scale ± 1 count LSD, typical, following calibration*
Gain Stability	Vs. Temperature: ±50 ppm/°C Vs. Time: ±20 ppm/month
Analog Filtering
Fixed	2 kHz
Selectable	5-pole filter with selectable low-pass corner frequency of 5, 10, or 20 Hz
Frequency Characteristics	Corner Frequency   Response at . . . 5 Hz 10 Hz 20 Hz -3 dB 5 Hz 10 Hz 20 Hz -60 dB 32 Hz 65 Hz 125 Hz
Step Response Settling Time (Full-Scale Output)	Corner Frequency    5 Hz 10 Hz 20 Hz To 1% of final value 250 ms 125 ms 60 ms To 0.1% of final value 400 ms 200 ms 100 ms To 0.02% of final value 600 ms 300 ms 170 ms
Peak Capture	Positive analog peak, digitally held for indefinite display; minimum full-scale input pulse duration is 6 msec (to 1% of full-scale accuracy), 12 msec (to 0.1% of full scale accuracy), and 20 msec (to 0.02% of full-scale accuracy); PEAK and TRACK modes controlled by front-panel button, rear-panel logic input, or computer-port command
Analog Output: See 3500 Series General Specifications
Frequency Characteristics and Step Response Settling Times	After (A) FIXED ANALOG FILTER or after (B) +PEAK in "TRACK" Mode: -3 dB at 2 kHz; -60 dB at 16 kHz; settling time to 1% of final value: 0.6 msec; to 0.1% of final value: 0.75 msec; to 0.02% of final value: 1.25 msec After (B) +PEAK in "PEAK" Mode: Settling time to 1% of final value: 6 msec; to 0.1% of final value: 12 msec; to 0.02% of final value: 20 msec After (C) SELECTABLE ANALOG FILTER: See Analog Filtering (Selectable), above
* Initial (uncalibrated) inaccuracy may be as great as ±0.04% of full scale.  Maximum error that could occur upon replacement of the Model 3560 not followed by calibration is ±0.08% of full scale.