User`s guide

M3000A/M3046AM3015A/M3016A Service Guide
4-16 Testing the Instrument
1RLVH&KHFN
6WHS Check that the Monitor is in Service Mode and in the CO
2
window.
6WHS Disconnect the flowmeter and connect the 5% calibration gas and flow regulator in
its place.
6WHS Open the valve to apply the 5% Calibration Gas and wait until the value is stable.
6WHS Check the Noise Index (x6) displayed nect to the CO
2
value on the M3046A dis-
play (this indicates the level of noise on the CO
2
wave). If the value exceeds 3
mmHg the IR Lamp must be replaced.
&2
*DV0HDVXUHPHQW&DOLEUDWLRQ&KHFN
After switching the Measurement Extension on, wait at least 20 minutes before checking the
calibration.
Check the calibration of the CO
2
Gas Measurement as follows:
6WHS Check that the 5% calibration gas and flow regulator are connected.
6WHS Calculate the expected measurement value in mmHg as follows:
0.05 x (ambient pressure) = value mmHg
e.g. 0.05 x 736 = 36.8 mmHg (with an ambient pressure of 736 mmHg)
6WHS Open the valve on the flow regulator to allow 5% CO
2
gas to flow into the Exten-
sion. Allow the value to stabilize.
6WHS Check that the value on the instrument (measurement value on the Main Screen,
x7)) matches the calculated mmHg value ± 2.6 mmHg. If the value is outside the
tolerance, calibrate as described in Step 9 onwards.
6WHS Disconnect the 5% calibration gas and connect the 10% calibration gas.
6WHS Calculate the expected measurement value and tolerance in mmHg as follows:
0.1 x (ambient pressure) = value mmHg
±0.07 x (value mmHg) = tolerance
e.g. 0.1 x 737 mmHg = 73.7 mmHg (with an ambient pressure of 737 mmHg)
±0.07 x 73.7 mmHg = ±5.16 mmHg tolerance
6WHS Open the valve on the flow regulator to allow 10% CO
2
gas to flow into the Exten-
sion. Allow the value to stabilize.
6WHS Check that the value on the instrument (x8) matches the calculated mmHg value
within the calculated tolerance. If so, the Measurement Extension is correctly cali-
brated. If the value is outside the tolerance, calibrate as follows
6WHS If not already connected, connect the 5% calibration gas.
6WHS Select Cal. CO
2
.