AirSense
Model 310en Operator’s Manual
3. The high CO
2
limit value is adjusted with the ‘UP’
and ‘DOWN’ buttons while JP3 is closed. When
JP3 is opened, the new relay setpoint takes effect
and is stored in non-volatile memory.
4. Remove the shorting block from JP3 to save the
value, and restore the shorting block to its original
position on JP5.
High CO
2
Limit Hysteresis Adjustment
The default high CO
2
limit hysteresis is approximately 40
ppm and can be inspected and adjusted between 0 and 200
ppm as follows:
1.
Note whether the shorting block at jumper JP5 is
covering both pins or only a single pin
, then
borrow the shorting block and slide it over the two
pins of jumper JP3 (see Figure 2 on page 5). Use a
narrow-bladed screwdriver or the like to
momentarily connect the two pins of JP1 while JP3
is closed.
2. If the display is present it will show the current high
CO
2
limit hysteresis value in ppm CO
2
.
If there is no display the current value of the high
CO
2
limit hysteresis is reported by the analog output
scaled at 20 ppm/Volt. A high CO
2
limit hysteresis
of 40 ppm is indicated by and output voltage of 2.0
volts.
3. The high CO
2
limit hysteresis value is adjusted with
the ‘UP’ and ‘DOWN’ buttons while JP3 is closed.
4. Remove the shorting block from JP3 and return it to
its previous position over one or both pins of jumper
JP5. When the jumper is opened, the new High
CO
2
Limit Hysteresis setpoint takes effect and is
stored in non-volatile memory.
3/9/15
Digital Control Systems
Page:
8
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•
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