User Manual

Model 1000 H2S Echem

Model 1000 H2S Echem Instruction Manual Rev. 2.8 Page 21 of 30

Sensor life is an estimated remaining use of the sensor head, between 0% and 100%

Example: 85=85% sensor life

40001 Detectable Range

i.e. 100 for 0-100 ppm, 50 for 0-50% LEL, etc

40002 Current Gas Reading

The current gas reading as a whole number: If the reading is displayed as 23.5 on the display, this register

would contain the number 235.

40003 Alarm 1 Set point

This is the trip point for the first alarm.

40004 Alarm 2 Set point

This is the trip point for the second alarm.

40005 Status Bits Status Bits

High Byte

Bit 7 Not used, always 0

Bit 6 Not used, always 0

Bit 5 Not used, always 0

Bit 4 Not used, always 0

Bit 3 1-Unit is in calibration 0-Normal operation

Bit 2 1-Alarm 2 is ascending 0-Alarm 2 is descending

Bit 1 1-Alarm 2 is normally energized 0-Alarm 2 is normally de-energized

Bit 0 1-Alarm 2 is latching 0-Alarm 2 is non-latching

Low Byte

Bit 7 1-Alarm 2 Relay is energized 0-Alarm 2 Relay is not energized

Bit 6 1-Alarm 1 is ascending 0-Alarm 1 is descending

Bit 5 1-Alarm 1 is normally energized 0-Alarm 1 is normally de-energized

Bit 4 1-Alarm 1 is latching 0-Alarm 1 is non-latching

Bit 3 1-Alarm 1 Relay is energized 0-Alarm 1 Relay is not energized

Bit 2 1-Fault is normally energized 0-Fault is normally de-energized

Bit 1 1-Fault is latching 0-Fault is non-latching

Bit 0 1-Fault Relay is energized 0-Fault Relay is not energized

The following is a typical Master Query for device # 8:

Field Name HEX DEC RTU

Slave Address 08 8 0000 1000

Function 03 3 0000 0011

Start Address Hi 00 0 0000 0000