Welch Allyn Atlas - Page 20

Section 2 - Service
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 11
2.3.5.7 Measure the voltage at the battery connector
(at the Atlas) to the nearest 10mV.
NOTE: Do not measure at the power supply, since
cable resistance will introduce error.
2.3.5.8 At the HyperTerminal, type:
Pangea> power cal XXXX<ENTER>
(where XXXX represents the measured voltage in
millivolts no decimal point.) For example, if you
measured 6.010V at the battery connector, use the
command “power cal 6010<ENTER>”.
2.3.5.8 The Atlas will respond:
raw = ZZZZ mV true = 6010 mV OK
(where ZZZZ is the raw uncalibrated reading that the
instrument made.)
2.3.5.9 Reduce the power supply to 5.6 volts. You
should soon hear the “low battery” alarm.
2.3.5.10Measure the voltage at the battery connector
to the nearest 10mV.
2.3.5.11At the HyperTerminal, type:
Pangea> power cal XXXX<ENTER>
(where XXXX represents the measured voltage in
millivolts no decimal point.) For example, if you
measured 5.590V at the battery connector, use the
command “power cal 5590<ENTER>”.
2.3.5.12 The Atlas will respond:
raw = ZZZZ mV true = 5590 mV OK
(where ZZZZ is the raw uncalibrated reading that the
instrument made.)
2.3.5.13 Finish by typing: (this will re-boot ATLAS)
Pangea> hw reset<ENTER>
2.3.5.14 Turn Atlas OFF and remove the power
supply.
2.3.5.15 Re-Install the battery.