Welch Allyn SureTemp 670 Especificações descarregar pdf (Página 34)

Technical Manual

5-2 Welch-Allyn, Inc.

70898-0000A

Instrument circuitry error codes are listed in the table below.

CLASS ERR NUM SELF-TEST DESCRIPTION

Probe E0.1 Probe heater accumulation test.

Probe E0.2 Probe a/d pulse width test.

Probe E0.3 Adaptive probe gain too high or too low test.

Ambient E1.1 Ambient temperature high test.

Ambient E1.2 Ambient temperature low test.

Battery E2.1 “Dead” battery test.

Internal E3.1 RAM read/write test.

Internal E3.2 ROM checksum test.

Internal E3.3 CPU instruction test.

Internal * CPU Watchdog test.

*Will cause hardware reset, but no error.

Internal E4.0 PTB resistor a/d pulse width test.

Internal E4.1 RatioCal resistor a/d pulse width test.

Internal E5.0 Heater circuit test.

Internal E5.1 Heater overheated test.

Internal E5.2 Heater watchdog timeout test.

Internal E6.0 PTB resistor “temperature” test.

Figure 6 - Self-Test /Error Table

Equipment Required

Most troubleshooting operations can be performed with standard tools and meters.

•

A #1 Phillips screwdriver will remove all instrument screws.

•

A standard lab 3.5 digit digital multi-meter (DMM) will provide sufficient accuracy

for most tests. A needle-tipped pair of probes is recommended.

•

For particularly difficult tasks, an oscilloscope is sometimes the only way to

analyze high speed signals, but is not generally required.

•

Standard electronic tools and supplies for small surface mounted and through hole

component rework will be needed to perform any electronics repairs. Some

surface mounted components are extremely small and present a challenge for

rework by hand. A surface mount rework station is recommended.

•

Power and ground are available at the battery terminals E2 (power) and E3

(ground).

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Welch Allyn SureTemp 670 Especificações Página 34