Models T802, 802E Appendix A Menu Trees (Reference: 06530C DCN6418) Appendix A Error! Unknown document property name.Error! Unknown document property name. A-21 Signal Name Bit or Channel Number Description
A status outputs, U24, J1017, pins 1–8 = bits 0–7, default I/O address 323 hex
ST_SYSTEM_OK 0 0 = system OK
1 = any alarm condition
ST_CONC_VALID 1 0 = conc. valid
1 = warnings or other conditions that affect validity of
concentration
ST_CAL_MODE 2 0 = in calibration mode
1 = in measure mode
ST_CAL_SPAN 3 0 = calibrating span
1 = calibrating zero
ST_CAL_RANGE2 4 0 = calibrating range 2
1 = calibrating range 1
ST_CAL_CO2 1 5 0 = calibrating CO2
1 = calibrating O2
6–7 Spare
B status outputs, U27, J1018, pins 1–8 = bits 0–7, default I/O address 324 hex
0–7 Spare
Front panel I2C keyboard, default I2C address 4E hex
MAINT_MODE 5 (input) 0 = maintenance mode
1 = normal mode
LANG2_SELECT 6 (input) 0 = select second language
1 = select first language (English)
SAMPLE_LED 8 (output) 0 = sample LED on
1 = off
CAL_LED 9 (output) 0 = cal. LED on
1 = off
FAULT_LED 10 (output) 0 = fault LED on
1 = off
AUDIBLE_BEEPER 14 (output) 0 = beeper on (for diagnostic testing only)
1 = off
Relay board digital output (PCF8575), default I2C address 44 hex
RELAY_WATCHDOG 0 Alternate between 0 and 1 at least every 5 seconds to keep
relay board active
1–3 Spare
CO2_CELL_HEATER 2 4 0 = CO2 sensor cell heater on
1 = off
O2_CELL_HEATER 4 5 0 = O2 sensor cell heater on
1 = off
CAL_VALVE 6 6 0 = let cal. gas in
1 = let sample gas in
O2_SPAN_VALVE 4, 6 7 0 = let O2 span gas in
1 = let zero gas in
07275B DCN6418