Owner manual

840 Operators Manual
Model 840 Operator Manual Rev. 1.9 Page 20 of 29
40012 Cal Status Bits
High Byte
Bit 7 Not Used
Bit 6 Not Used
Bit 5 Not Used
Bit 4 Not Used
Bit 3 Not Used
Bit 2 Not Used
Bit 1 Not Used
Bit 0 Not Used
Low Byte
Bit 7 1 = Channel 8 Cal 0 = Channel 8 no Cal
Bit 6 1 = Channel 7 Cal 0 = Channel 7 no Cal
Bit 5 1 = Channel 6 Cal 0 = Channel 6 no Cal
Bit 4 1 = Channel 5 Cal 0 = Channel 5 no Cal
Bit 3 1 = Channel 4 Cal 0 = Channel 4 no Cal
Bit 2 1 = Channel 3 Cal 0 = Channel 3 no Cal
Bit 1 1 = Channel 2 Cal 0 = Channel 2 no Cal
Bit 0 1 = Channel 1 Cal 0 = Channel 1 no Cal
7.2 Download procedure
The Model 840-N4X Gas Detection Alarm System has very capable features in the area of data logging and
event reporting. Continuous data for TWA and Peak readings are stored at 1-hour increments in permanent
memory for retrieval. All Event Records are stored only as they occur. The duration of the recorded
storage is 1 month for the TWA readings, Peak readings, and Event Records.
This data can be downloaded to an external PC. The downloaded data can be exported into a Microsoft
Excel spreadsheet for graphing purposes. The procedure requires a computer with windows Hyper
Terminal, a serial port, and Detcon connections cable part number 980-26117. If the computer does not
have a serial port, a USB to serial adapter will also be required. USB to serial adapters may be purchased
from many retail electronics stores.
NOTE: The download feature will only work with the following X40 controller hardware. This number is
printed in white on the back of the controller PCB. The controller firmware must be a version that supports
this feature. The controller firmware revision can be checked by cycling power to the controller and
observing the LCD display.
Hardware Number Firmware Version
440-005071-001 1.23 or higher.
440-005072-001 1.23 or higher.
440-005073-001 1.18 or higher.