Campbell Scientific CVS4200 / BVS4300 Stationary Samplers - Manual (Page 84)

CVS4200 / BVS4300 Stationary Samplers
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9.3 Testing System Vacuum
Using the (optional) built-in pressure/vacuum gauge, take a reading to ensure
system has no leaks. Optimal pressure is above 28 psi. Optimal vacuum should
be 12 psi or better.
If the system is not performing at its peak, try the following:
1. Check intake hose for leaks/kinks.
2. Check discharge tube, ensure it has no leaks and is in good shape.
3. Check all fittings to ensure they are tight.
4. Make sure when tightening and loosening the gland nuts on the top of the
metering chamber that the bottom nut is held secure and does not move on
the cover. Ensure the top nut is securely tightened, and use a wrench if
necessary.
5. If system is still not performing at its peak, inspect pump and all pump
tubing.
9.4 Controller Battery Repalcement Procedure
1. Make sure the controller is powered.
2. Remove Touchpad (clear) cover from the controller, remembering to
handle internal ribbon cable and connector with care.
3. Locate the battery holder on the normal left side of the circuit board. The
battery is a 1/2” cylinder about 1” in length. The positive (+) end of the
battery has a raised button. Note the button’s relative position in the
holder. It should be pointing away from the display side of the board.
4. Place new battery in holder, noting position of button with respect to the
polarity indicators in the holder.
5. Check battery status, as above. If necessary, locate small white button at
top of the control board (under display) and push to restore factory
defaults.
6. Replace cover securely and re-enter user settings.
9.5 Storage
If the sampler is not to be used for an extended period of time, store the unit in
an upright position in a warm, dry location. If the unit has an integral battery,
recharge the unit prior to storage.
Acceptable storage temperature: –30º to +60ºC (–22º to +140ºF)