TELEDYNE API
M703E Calibrator Operator’s Manual Operating the M703E Calibrator

6.11. OPERATING THE M703E CALIBRATOR AS AN O3

PHOTOMETER

The M703E can easily be configured to measure an external source of ozone.

6.11.1. SET UP FOR OPERATING THE M703E AS AN O3

PHOTOMETER

To convert the M703E from an O3 calibrator to and O3 photometer:
1. Remove the two loop-back tubing assemblies on the rear panel connected to the ‘PHOTO IN’ and
‘PHOTO REF IN’ fittings.
2. Connect the ozone source to be measured to the ‘PHOTO IN’ fitting.
This gas must be supplied at atmospheric pressure.
3. Connect a reference gas (Zero Air) for the photometer to the ‘PHOTO REF IN.’
This gas must be supplied at atmospheric pressure. To avoid interference effects, the reference gas
should be from the same source than is being used to feed the ozone generator that is being
assayed.
EXHAUST line: Max Length=3 meters ( or 10 feet)
Enclosure Wall

M703E

Photometric

O3 Calibrator

VENT
CAL GAS OUT
DRY AIR IN CAL GAS OUT
PHOTOMETER OUTLET
PHOTOMETER INLET
PHOTOMETER ZERO IN
PHOTOMETER ZERO OUT
EXHAUST
ZERO AIR IN
REFERENCE GAS
SOURCE
Capped
O3SOURCE TO BE
MEASURED
Capped
Minimum input gas flow for
Photometer is 800 cc3/min

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Figure 6-4: Set up for Using the M703E to Measure an External O3 Source
05744 Rev B 77