Analogue Signals Calculator Modules

Analogue Signal Calculator modules

DIF

Differentiator module type 664

The HSE Differentiator is a universal analog calculator for evaluating the rate of rise and fall of signals such as blood pressure dp/dt, force dF/dt, displacement etc. It has to be directly connected to a DC Bridge Amplifier. The input signal can be applied either internally through the bus system or from the front from an external instrument. Output signals available are the continuously differentiated signal, its maxima and its minima. Specially for differentiating the left ventricular pressure there is also a positively limited analog output for improved resolution of the end-diastolic pressure. All output signals are available through the system bus for further processing or for passing internally through the recorder interface to a recorder. The differentiated signal is also available at the auxiliary output on the front panel.

Description

Input externally through BNC socket or internally from system bus as selected by switch (±10 V)

Range differentiation factor x calibration value x sec-1 (differentiation factor = x1; x2; x5; x10; x20; x50; x100; x200) (calibration value: e.g. 100 mmHg or 1 mN)

Overrange overrange of the differential stage is indicated by LEDs

Amplitude adjustment through 10-turn trimmer, separately adjustable for external and internal input

Operating mode selected either amplitude adjustment (Matching Cal. Val.) or differentiation (RUN)

Output low-pass filter 12 positions from 2 Hz to 10 kHz, selected by rotary switch

Analogue indication through LED bargraph +15 LEDs/–14 LEDs for visual monitoring of the differentiated signal. The sensitivity is ±10 V.

Signal output a) on front panel through BNC socket (+10 V)
b) through bus connector to PLUGSYS Measuring System through link plugs; all signals or selectively:
     - differentiated signal
     - maximum positive slope
     - maximum negative slope
     - positively limited input signal

Signal output MUX after pressing the MUX key the differentiated signal (or the calibration signal) is switched to the input of an optional digital voltmeter module for accurate calibration. The function is self-maintained; the module selected previously is switched off.

Limit Ref When differentiating the left ventricular pressure signal it is frequently interesting to evaluate the end-diastolic pressure. Through a 10-turn trimmer it is possible to evaluate a positively limited section of the pressure signal which can later be recorded enlarged on the recorder without overloading the recording channel. For calibration it is necessary to employ the LVP signal using the switch (EDP-LVP-P’).

Power supply 5 V, 700 mA through connector from PLUGSYS bus system.

Dimensions module for 19 inch rack, width 8 E (40.5 mm), height 3 U (128.7 mm), depth Europe size (220 mm)

Connector DIN 41612, 96-pin VG

Weight 330 g

HUGO SACHS ELEKTRONIK-HARVARD APPARATUS GmbH
Gruenstrasse 1 · D-79232 March-Hugstetten · GERMANY
Phone: +49 (0) 76 65 - 92 00-0 · Fax: +49 (0) 76 65 - 92 00-90

Description
Input	externally through BNC socket or internally from system bus as selected by switch (±10 V)
Range	differentiation factor x calibration value x sec-1 (differentiation factor = x1; x2; x5; x10; x20; x50; x100; x200) (calibration value: e.g. 100 mmHg or 1 mN)
Overrange	overrange of the differential stage is indicated by LEDs
Amplitude adjustment	through 10-turn trimmer, separately adjustable for external and internal input
Operating mode	selected either amplitude adjustment (Matching Cal. Val.) or differentiation (RUN)
Output low-pass filter	12 positions from 2 Hz to 10 kHz, selected by rotary switch
Analogue indication	through LED bargraph +15 LEDs/–14 LEDs for visual monitoring of the differentiated signal. The sensitivity is ±10 V.
Signal output	a) on front panel through BNC socket (+10 V) b) through bus connector to PLUGSYS Measuring System through link plugs; all signals or selectively: - differentiated signal - maximum positive slope - maximum negative slope - positively limited input signal
Signal output MUX	after pressing the MUX key the differentiated signal (or the calibration signal) is switched to the input of an optional digital voltmeter module for accurate calibration. The function is self-maintained; the module selected previously is switched off.
Limit Ref	When differentiating the left ventricular pressure signal it is frequently interesting to evaluate the end-diastolic pressure. Through a 10-turn trimmer it is possible to evaluate a positively limited section of the pressure signal which can later be recorded enlarged on the recorder without overloading the recording channel. For calibration it is necessary to employ the LVP signal using the switch (EDP-LVP-P’).
Power supply	5 V, 700 mA through connector from PLUGSYS bus system.
Dimensions	module for 19 inch rack, width 8 E (40.5 mm), height 3 U (128.7 mm), depth Europe size (220 mm)
Connector	DIN 41612, 96-pin VG
Weight	330 g