Clean the optical sensor with isopropyl alcohol. Adjust sensor alignment or replace the sensor.
The device is divided into three primary modules: the Power Supply Board, the Main Control Board, and the Signal Acquisition/Pre-amplifier Module.
AC (110/220V) or DC via a built-in rechargeable 12V lithium battery. 2. Theory of Operation
Set the simulator output to a standard at a frequency of 1Hz. carewell ecg 1101 service manual verified
Before performing component-level diagnostics, verify that the device operating parameters align with standard factory limits:
Clean the heating elements with an alcohol swab. Measure and adjust the print head driving voltage.
Calibration aligns the input sensitivity with the mechanical print-out matrix. Required Tools Clean the optical sensor with isopropyl alcohol
Electrical Safety Analyzer Checklist (IEC 60601-1 Compliance)
Calibrated Digital Multimeter (DMM) with 4.5-digit accuracy. Step-by-Step Sensitivity Calibration
Set the recording speed to 25mm/s and output a standard 1Hz square wave from the simulator. Measure the distance between identical peaks on the grid paper. The distance must be exactly 25mm. Repeat the test at 50mm/s to confirm linear motor tracking. Safety Testing AC (110/220V) or DC via a built-in rechargeable
Verify that thermal-sensitive paper is loaded with the glossy chemical side facing the printhead. Check the printhead supply voltage (typically requires +12V DC).
: Ensuring the machine is on a mobile trolley for easy access and that electrodes are applied carefully to avoid patient discomfort .