Zero Or Low Flow Problems - Teledyne T200H User Manual

Teledyne API - Model T200H/T200M Operation Manual
SAMPLE
GAS
INLET
EX HA UST
GAS
OUTLET
PUMP
Figure 7-10:

7.2.3. ZERO OR LOW FLOW PROBLEMS

7.2.3.1. Sample Flow is Zero or Low
Note
07270D DCN7141
O
2
Sensor
Orifice Dia.
0.004"
Orifice Dia.
0.004"
OZONE DRYER
T200M – Internal Gas Flow with O
The T200H/M does not actually measure the sample flow but rather calculates it from a
differential pressure between sample and vacuum manifold. On flow failure, the unit
will display a SAMPLE FLOW WARNING on the front panel display and the
respective test function reports XXXX instead of a value "0". This message applies to
both a flow rate of zero as well as a flow that is outside the standard range (200-600
cm³/min; 300-700 cm³/min with O
If the analyzer displays XXXX for the sample flow, confirm that the external sample
pump is operating and configured for the proper AC voltage. Whereas the T200H/M
can be internally configured for two different power regimes (100-120 V and 220-240
V, either 50 or 60 Hz), the external pump is physically different for each of three power
regimes (100 V / 50 Hz, 115 V / 60 Hz and 230 V / 50 Hz). If the pump is not running,
use an AC Voltmeter to make sure that the pump is supplied with the proper AC power.
If AC power is supplied properly, but the pump is not running, replace the pump.
Sample and vacuum pressures mentioned in this Section refer to operation of the
analyzer at sea level. Pressure values need to be adjusted for elevated locations,
as the ambient pressure decreases by about 1 in-Hg per 300 m / 1000 ft.
NO/NO
X
VALVE
NO
2
NO COM
Converter
NC
AUTOZERO
VALVE
COM
NC
NO
Orifice Dia.
Orifice Dia.
0.007"
REACTION
CELL
PMT
Sensor, OPT 65A
2
option installed).
2
Troubleshooting & Service
FLOW PRESSURE
SENSOR PCA
VACUUM
PRESS URE
SENSO R
SAMPL E
PRESS URE
SENSO R
O
3
GENERATOR
0.007"
O
3
Scrubber
INSTRUMENT CHASSIS
229