Detcon 1640-N4X - Manual (Page 17)

1640-N4X
1640-N4X Instruction Manual Rev. 0.0 Page 13 of 28
displayed on the device as 1.00 should be entered as 2 decimal points, with 1.00 entered as the range. This
will provide the correct readout if entered correctly. If the device has a range of 5PPM and is displayed on the
device as 5.00, the range should be entered as 2 decimal points with a Range of 5.00. This will provide a
reading of 5.00 on the display as the range. A range of 50 that is displayed as 50.0 should be entered as one
decimal point and a range of 50.0. A range of 50, that is displayed on the device as 50 (with no decimal
places), should be entered as 0 decimal places, and a range of 50. Entering the range before entering the
decimal point value may cause inaccurate results. Entering incorrect parameters for decimal point and range
will cause inaccurate results.
NOTE: Setting the range or the decimal point incorrectly will limit the setting of the alarm levels, and
cause the unit to operate incorrectly.
TYPE:
This parameter should be set to match the type of device connected. The “TYPE” parameter is an
alphanumeric display of 9 characters that can be changed by use of the “Arrow” keys (“u”, “v”). When the
appropriate alphanumeric character is found press the “ENTER” key to accept that character and move to the
next character position. When all characters have been set (including spaces) the parameter will be updated
and the cursor will change back to a Blinking Cursor.
RTO (Response Time Out):
This is pre-programmed to the value of 500 and should not be altered unless directed to do so by Detcon
Factory Personnel.
IPD (Interpoll Delay):
This is pre-programmed to the value of 50 and should not be altered unless directed to do so by Detcon
Factory Personnel.
When the Blinking Cursor is at the end of a set of parameters for one channel, use the “v” (Down Arrow) key
will move the Blinking Cursor to the next channel’s set of parameters. Continue on to set all of the parameters
for each device.
NOTE: Each device’s parameters must be set correctly for the 1640 to operate properly.
When all of the channels parameters have been set properly, press the “PROG” key to exit the menu and use
the “u” or “v” keys to move to the next or previous menu item, use the “PROG” key to exit the Main Menu, or
allow the unit to time out and the unit will return to Normal Operation after about 15 seconds.
4.2.5 Set Channel Alarms
This menu item allows the setup of Alarm Levels and whether the alarm is ascending or descending. The
parameters set for each channel should be set appropriately for the device that the channel is monitoring.
From the Main Menu use the “u” or “v” keys to move to the “SET CHANNEL ALARMS” menu item and
press the “ENTER” key to enter the “SET CHANNEL ALARMS” menu. The LCD will display the current
parameters for Channel 1. In example:
CHANNEL 1 ALARMS
ALM2 LEVEL: 40
ALM2 ASCENDING:Y
ALM1 LEVEL: 20 ALM3 LEVEL: 60
ALM1 ASCENDING:Y ALM3 ASCENDING:Y
The alarm parameters must be set correctly for each sensor that is attached. Use the “u” or “v” keys to move
through the parameters, setting the appropriate values for each parameter as described below. When the