MECG 2.0 Test System | User Manual
7
1.2 Application Revision Update
Associated with software release 1.6.0.0, the following features were
included:
-
The reverse Wilson Terminal offset is now implemented in software rather
than hardware, to reduce errors associated with the hardware circuit
-
DAC compensation is applied for equipment with serial Nos 2012-008
and higher
-
The 1.25mv range is disabled (2.5mV with DAC compensation now
achieves the required accuracy).
The software detects which serial number is attached and applies for the
appropriate compensation. Equipment with serial numbers earlier than 2012-
008 will continue to operate with the software as before.
As MECG 2.0 is equipped with a 12-bit DAC, it is must to use the DAC
compensation file. For users purchasing MECG 2.0 in 2020 (serial number
as ME2001-XXXXXX), if the testing requ
ires, please refer to 3.5.2 ‘’How to
Update DAC Compensation File
’’ to update the DAC compensation file.
2
Hardware Specifications
Table 1: Specifications
Item
Details / Reference
Value
Output
channels
The 8 output channels are provided
through a network as specified in IEC
60601-2-51 to provide signals to 10
lead electrodes; in the device under
test, this will be displayed as 12 leads.
8 outputs
10 lead electrodes
12 leads
Voltage
accuracy
5
IEC 60601-2-51 specifies a limit of
±1%, but does not provide a lower limit
(all systems must have a lower limit).
For MECG 2.0,
±1% for values
greater or equal to
5
The accuracy specification is for a single point. Since the tests in IEC 60601-2-25:2011 are effectively
for 2 points, the applied error can be theoretically twice the declared values. However, the probability of
this is very small, and most cases 2 points will be within the required above specification.
