Welch Allyn Holter System - User Manual - Manual (Page 54)

50 Directions for Use Welch Allyn Holter System
Table 12. Operation
Power source AA (size LR6) Alkaline battery or batteries
Recording period up to a 48-hours continuous
Minimum 5 days (HR300-XXXXX R only)
Storage capacity SanDisk ® 256 MB Secure Digital (SD) card for 200 sps (HR100, HR300, HR1200)
SanDisk
®
1 GB ULTRA II SD card for 200 sps (HR100)
SanDisk ® 1 GB ULTRA II SD card for 200, 500, 1000 sps (HR300, HR1200)
SanDisk
®
2 GB ULTRA II SD card for 200, 500, 1000 sps (HR1200)
FAT file format recommended for SD Card sizes 2 GB and less
Storage period Data remains valid for >5 years or until SD card is initialized
Battery Life minimum of 24-hours
Pacemaker Detection ANSI/AAMI EC38-1998
Effective A/D bit
Resolution 0.5 uV
Dynamic Range +/-300 mV
Frequency Response 0.05 Hz to 100 Hz
Sampling Rate HR100 200 sps
HR300 128 sps (HR300-XXXXX R only)
HR300/HR1200 200, 500, 1000 sps
User Adjustable
Parameters None
Applied Currents HR100 None
HR300 None
HR1200 Lead connection failures are detected by a 0.4 V bias, which
is applied to each patient electrode connection through a 40 Mohm
ohm resistor with respect to the reference electrode.
Table 13. Environmental Specifications
Operating Temperature 32° F to +113° F (0° to 45° C)
Storage Temperature -4° F to +149° F (-20° to +65° C)
Operating Humidity 5 to 95% non-condensing
Storage Humidity 5 to 95% non-condensing
Operating Altitude -500 to 15,000 ft (-150 to 4500 m)
Storage Altitude -500 to 50,000 ft (-150 to 15500 m)
Operating Shock 2.95 in (75 mm) drop to hard surface on any axis
Storage Shock 31.5 in (0.8 m) drop to hard surface on any axis
Operating Vibration 0.0002 G2/Hz from 5 to 350 Hz, ramping to 0.0001 G2/Hz from 350 to 500 Hz, random vibration
spectrum, 10 minutes in each of three orthogonal axes.
Storage Vibration Packaged recorder and accessories survived standard drop and vibration procedure published
by the National Safe Transit Association, pre-shipment test procedure, March 1977.
Table 14. Protection against ingress of water
Holter recorder No protection against water ingress
Patient Cable No protection against water ingress