Model 610A
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The Low LED on the front panel flashes while the latching/non-latching option is
displayed. The display will indicate the current selection, (nL or LA). Press the Mode
button to toggle the selection. Non-Latching (nL) is the factory default for this selection.
The last Low alarm option to appear on the display is the alarm set point (trip level). If this
level is reached or exceeded, the Low alarm outputs activate. The display indicates the
current Low alarm set point. Press the Mode button repeatedly, until the desired Low
alarm set point appears on the display (5 to the High set point in increments of 5). The
Low set point cannot be set higher than the High set point. The factory default for this
selection is 30. In case of common alarms, this option is available at the master board
only.
3.7.4 Calibration Level Option
After the Low alarm options have been selected, the user chooses the Calibration Level.
The panel displays CL for 5 seconds, then the current calibration level. The acceptable
range of calibration level, in % LEL (lower explosive limit), is between 25 and 90,
inclusive. The factory default for this selection is 50.
3.7.5 Password Enabled/Disabled Option
After the calibration level option has been selected the Password Enabled/Disabled
option displays. The display indicates the current selection, (PE or Pd). Press the Mode
button to toggle the selection. Password Disabled (Pd) is the factory default for this
selection.
If the Password Disabled is selected, the unit returns to normal operation. If this setting is
changed from Password Disabled to Password Enabled, the user enters a new
password. The unit displays the left digit of the existing password (flashing on the
display). The right digit is blank until the left digit has been selected. Press the Mode
button repeatedly until the desired value displays. Once the left digit is correct, wait for
five seconds and the right digit of the display begins flashing and the left digit is blank.
Press the Mode button repeatedly, until the desired value displays then returns to normal
operation.
3.7.6 LED Test
Press and hold the Reset button for 5 seconds. All LEDs and display segments will flash
for as long as the Reset button is pressed. When the button is released, the LEDs will
return to their normal state reflecting the current status condition of each channel.
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