Welch Allyn SureTemp 679 User Manual

Operational Characteristics
SureTemp
®
Model 678/SureTemp
®
Model 679 1-3
Self Tests
Instrument Reset/Self Tests
If a problem is reported with an instrument, it is preferred that the user investigate
operation
before the unit is reset. However, resetting the electronics is the
recommended starting point in the checkout process.
The batteries must be removed from the instrument to reset the internal
microprocessor electronics. Follow the battery removal instructions in the
Preventive
Maintenance
section.
Caution: After battery removal, any remaining charge due to internal
capacitance must be discharged to achieve a proper reset. After the
batteries are out, press the Mode or Timer button for about 5 seconds.
The electronics will now properly reset upon new battery installation.
1. Remove the probe from the probe storage well and unplug the probe connector
from the instrument by depressing the locking tab and pulling on the connector
body. Do not pull on the cord.
2. While watching the display, install the batteries per the instructions in the
Preventive Maintenance
section and observe the power up self test.
The self test includes several internal microprocessor self tests, instrument electronics
tests and the display test. If there are internal electronics problems detected by the
self tests, the error “|X|” icon will be displayed and an audible tone will sound. Refer
to the
Error Codes
in the
Troubleshooting
section for an explanation.
Display Test
The display test begins with each display segment and icon being individually lit in
brief and rapid succession. Immediately after this, all display segments and icons are
simultaneously illuminated briefly followed by a display of the software revision in this
instrument. The beeper also briefly sounds at the beginning of the test. At the end of
the test, the display goes blank.
Figure 2 - M678 Display
Note:
If a probe is installed during this power up time, the probe type will be displayed
as the last item before the display blanks. At this point, there should be no
probe connected to the instrument.
If there is no display, any missing segments, or no beeper, refer to the
Troubleshooting
section.

Welch Allyn SureTemp 679 Specifications

General

Brand	Welch Allyn
Model	SureTemp 679
Category	Thermometer
Language	English