Analogue Signal Evaluator Modules

Analogue Signal Evaluator modules

HRM

Heart Rate Module type 669

This module is used to determine frequency (rate) within the range 20 to 1000 beats/min. The input signal is provided either internally through the PLUGSYS bus system or externally directly through the built-in ECG amplifier or from an externally amplified signal. Heart rate and ECG can be recorded simultaneously.

Description

Input   selected by switch "INT/INPUT” (indication through LED)
a) internally: ‘INT” signal through the 96-pin connector from the PLUGSYS bus system
b) externally: “INPUT”
    • through the built-in ECG amplifier
     • from an external unit

Sensitivity 5 mV to 10 V

ECG input: 0.1 mV to 25 mV

Input filter band-pass, bottom and top frequency limit selected separately within the ranges 0.2 / 1 / 5 Hz and 25 / 50 / 100 Hz

Trigger operation adjustable over a wide range through 10-turn potentiometer

Range 3 ranges are available, selected by a switch:
• 200: 20 to 250 beats/min
• 400: 40 to 500 beats/min
• 800: 80 to 1000 beats/min

Indication 3½-digit LED display (0 to 1000 beats/min); additional trigger response check through LED in display field

Outputs • the analogue frequency signal is available at a BNC socket on the front panel (0 to 10 Volt) and through the connector on the PLUGSYS bus system
• the external input signal (±10 Volt) can also be transmitted to the PLUGSYS bus system (e.g. ECG)

Output filter 3 positions: 0.5 sec / 1 sec /5 sec, are provided for smoothing the recording

Calibrating the heart rate on the recorder, i.e. setting the rate (shown at the display) in relation to the pen deflection on the recorder. The recording range for heart rate is set by using the trimmers CAL and SUP. Adjustment is through 10-turn trimmers and the CAL/SUP value is shown by the LED display.
The choosen CAL values are switched to the display and to the output for feeding into the recorder by setting the CAL switch to “CAL”.

Calibrating the ECG output after moving the "CAL ECG” switch from “Meas” to "0.3 mV" or "1mV" a square-wave signal of the corresponding amplitude is available at the ECG recording output.

Signal output MUX after pressing the MUX key the response signal is switched to the input of an optional digital voltmeter. The response signal can be checked on a display unit at the BNC output. The function is self-maintained; the module previously selected is switched off.

Power supply 5 V, 450 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 400 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	selected by switch "INT/INPUT” (indication through LED) a) internally: ‘INT” signal through the 96-pin connector from the PLUGSYS bus system b) externally: “INPUT” • through the built-in ECG amplifier • from an external unit
Sensitivity	5 mV to 10 V
ECG input:	0.1 mV to 25 mV
Input filter	band-pass, bottom and top frequency limit selected separately within the ranges 0.2 / 1 / 5 Hz and 25 / 50 / 100 Hz
Trigger operation	adjustable over a wide range through 10-turn potentiometer
Range	3 ranges are available, selected by a switch: • 200: 20 to 250 beats/min • 400: 40 to 500 beats/min • 800: 80 to 1000 beats/min
Indication	3½-digit LED display (0 to 1000 beats/min); additional trigger response check through LED in display field
Outputs	• the analogue frequency signal is available at a BNC socket on the front panel (0 to 10 Volt) and through the connector on the PLUGSYS bus system • the external input signal (±10 Volt) can also be transmitted to the PLUGSYS bus system (e.g. ECG)
Output filter	3 positions: 0.5 sec / 1 sec /5 sec, are provided for smoothing the recording
Calibrating the heart rate	on the recorder, i.e. setting the rate (shown at the display) in relation to the pen deflection on the recorder. The recording range for heart rate is set by using the trimmers CAL and SUP. Adjustment is through 10-turn trimmers and the CAL/SUP value is shown by the LED display. The choosen CAL values are switched to the display and to the output for feeding into the recorder by setting the CAL switch to “CAL”.
Calibrating the ECG output	after moving the "CAL ECG” switch from “Meas” to "0.3 mV" or "1mV" a square-wave signal of the corresponding amplitude is available at the ECG recording output.
Signal output MUX	after pressing the MUX key the response signal is switched to the input of an optional digital voltmeter. The response signal can be checked on a display unit at the BNC output. The function is self-maintained; the module previously selected is switched off.
Power supply	5 V, 450 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	400 g