Specifications

Instruction 0019-9208
15
N
2
O Monitor 3010
3.7.1 Clean Air Calibration
Important! An air-cal should be done in clean ambient air,
NEVER in the actual test area. Keep in mind that poorly ven-
tilated areas may contain high background levels of CO
2
(over
1000 ppm) that could result in a 5 to 10 ppm offset in the N
2
O
reading. An unoccupied room or corridor is best suited to do
an air-cal. NEVER do an air-cal near an open window as the
temperature change may affect the accuracy.
1. If not already done, switch ON the monitor per Section 2.2.
2. Press the f3 button to turn ON the pump.
3. Allow the pump to run at least 2 minutes to purge the monitor of all
possible contamination. Make sure that the display reading is stable
before continuing with Step 4.
4. Press and hold down the f2 button until the following displays ap pear:
5. Press the f1 button to zero the monitor using clean ambient air. If the
calibration procedure was successful, the display will show:
If the procedure was unsuccessful, the message
will be displayed. If this happens, retry this pro ce dure, ensuring that
the monitor is only exposed to clean air. If the procedure is still un suc -
cess ful, then the monitor should be returned to a Bacharach Service
Center for evaluation.
3.7.2 Zero Gas Calibration
Use this procedure only if the instrument requires zeroed in an area sus-
pected of containing contaminates in the air such as background levels of
N
2
O or elevated CO
2
levels.