CritiCare - 507 EL
by CritiCare

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Scholar III Patient Monitor

Compact, lightweight and portable. A cost-effective solution for bringing ECG, pulse oximetry, noninvasive blood pressure, temperature, and respiration to hospitals, clinics, and private offices. The Scholar ® III combines all essential standard-of-care parameters for vital signs monitoring and conscious sedation procedures in one compact system. Continuously monitor five critical parameters (ECG, DOX™ digital pulse oximetry, ComfortCuff™ NIBP, temperature, and respiration) on a broad range of patients, from neonate to adult. The high resolution color TFT screen optimizes viewing of three patient waveforms while presenting digital values on large color-coded LED’s.

FORUMSView All (7)
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8 years ago
Wire disconnect in unit

Though I have been looking at the schematics for this unit, I have a green wire with inline fuse 1 end connected to the 4 pin power junction on main pcb, but can't determine where the other end connects. I pretty sure it is the sense wire for the battery charging circuit, which probably should be connected to the Ac/ charger jack on back panel, but not sure which pin. Anyone have a suggestion?



8 years ago
Need Service Manual, Schematics

Display functions but unit does not. Need to trace for circuit board and component damage



8 years ago
need thermal paper

need thermal paper for machine.

SERVICE COMPANIESView All Vital Signs/Multi-Parameter Companies


  • Three-lead ECG   
  • Digital SpO2   
  • NIBP with ComfortCuff technology   
  • Heart rate   
  • Temperature


Height7.6 in
Length 10.7 in
Weight8.5 lbs
PrinterThermal line printer
Temperature Range15 to 40 °C
Width10.1 in

Additional Specifications

Number of Leads: 3 
Lead View: I, II, III 
Gain Selection: x1/2, x1, x2, and x4 
Frequency Response: Diagnostic: 0.05 to 100 Hz 
Monitor: 0.5 to 40 Hz 
Electrosurgery Protection: Yes 
Defibrillation Protection: Yes 
Pacer Detection/Rejection: Yes 
Non-invasive Blood Pressure
Technique: Oscillometric upon inflation 
Auto. Measurement Cycles: 1, 2, 3, 5, 10, 15, 30, 60 min.; 2, 4 hr 
Adult Range: 30-250mmHg 
Neonate Range: 30-140mmHg 
Resolution: 1mmHg 
Transducer Accuracy: ±2mmHg or ±2% of reading, whichever is 
greater, over full range 
STAT Mode: 5 minutes of consecutive readings 
Pulse Oximetry
Range: 1 to 99% 
Resolution: 1% 
Accuracy: ±2% (70 to 99%) 
Method: Dual wavelength LED 
Averaging Time: Selectable 3 to 21 seconds 
Search Time: Selectable, 10 to 40 seconds 
Sensor Type: Reusable and Disposable selections 
Audio: Beep with each detected pulse, pitch 
varies with oxygen saturation 
Heart (Pulse) Rate
Source: ECG, SpO2, NIBP 
Range: 30 to 300 bpm (NIBP 30-240 bpm) 
Accuracy: ±1 bpm or ±1% 
Channels: 1 
Range, Accuracy: 20 to 45° C; 68 to 113° F (± 0.1° C) 
Display Resolution: 0.1° C/F 
Probe: YSI-400 Series 
Range: 9 to 150 breaths/minute 
Resolution: 1 breath/minute 
Accuracy: ±1% or ±1 breath/min 
Source: Impedance 
Alarm Indication: Audible, Visual 
Alarm Volume: User selectable: 1-10, Off 
Alarm Silence: Yes, 2 minutes or permanent

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