Philips M3046A - Checking and Resetting Time Counters

Preventive Maintenance Tests
Testin
g
the Instrument 153
Step 11 Select the value for the calibration gas. (The default value is 5.0%.)
Step 12 Open the valve on the calibration gas to allow CO
2
gas to flow into the Extension.
Allow the value to stabilize before the start of the calibration. Leave the valve open
until the instrument gives a prompt that gas can be removed.
Step 13 The Extension calibrates and prompts when calibration is successful.
Calibration Verification
Step 1 Reopen the 5% gas valve and allow the value to stabilize.
Step 2 Check that the value displayed on the Monitor is correct within the tolerance (see
Step 2 above).
Step 3 Disconnect the 5% calibration gas and connect the 10% calibration gas.
Step 4 Open the valve on the flow regulator to allow 10% CO
2
gas to flow into the
Extension. Allow the value to stabilize.
Step 5 Check that the value displayed on the Monitor is correct within the tolerance (see
Step 6 above).
If one or both values are not within tolerances, the M3015A must be exchanged.
Checking and Resetting Time Counters
The time counters on the sidestream CO
2
Extension must be checked before calibrating the
Instrument. As well, when parts are replaced, the appropriate counters must be reset to zero
(applies to units with serial number prefix DE020xxxxx only).
To check the counters, do the following:
Step 1 Select the counter you want to check (either Reset IRSourceTime or Reset
PumpOpTime).
Step 2 Press and hold lightly on the TouchStrip. The counter time will display.
Step 3 Release to view or press harder to reset. In addition, always observe the following
guidelines:
•When calibrating the CO
2
Extension, if no parts have been replaced, check the val-
ues displayed on the Reset PumpOpTime and Reset IRSourceTime
selections to make sure that they are within suggested guidelines for use (15, 000
hours of use). If the counter time is greater than 15, 000 hours, replace the appro-
priate part. See "Repairing the Instrument".
•When calibrating the CO
2
Extension, if parts have been replaced, reset the
appropriate values displayed on the Reset PumpOpTime and Reset
IRSourceTime selections to zero. See "Repairing the Instrument".