TSI Instruments Aerotrak 9303 Service Manual

6-1
CHAPTER 6
Troubleshooting
Symptom
Possible Cause
Corrective Action
Display jittery or not
working (Model 9303)
Contrast too low.
Open unit and adjust potentiometer on
main board to modify display contrast.
See Display Replacement.
Unseated cables.
Inspect display cable for cuts or exposed
wires. Replace with new display module.
See Display Replacement.
Damaged display.
Replace with new display module. See
Display Replacement.
Instrument does not meet
zero count specification
(<1 particle/5 min)
HEPA filter is not connected properly and
room air is leaking into the HEPA filter
assembly.
Check if the HEPA filter has been tightly
connected to the inlet.
Check if rubber O-ring (black) on the inlet
is in place.
Residual particles from previous samples are
shedding off internal parts and into the optics.
Purge instrument by running the
instrument for 10 to 15 minutes before
attempting zero count test.
The filter assembly or inlet is dirty or
contaminated with particles.
Clean the HEPA filter fitting or run an
extended test to clean out particles.
A leak has developed in the aerosol flow path
(Model 9303).
Tighten all tubing connections
Internal optics have become dirty.
Clean optics. See Optics Block Cleaning.
Pump not working
(Model 9303)
Incorrect flow rate.
Use flowmeter to measure flow rate
(factory default 2.83 L/min). Redo flow
calibration if needed.
No input power to pump.
Check voltage on main board J3
supplying power to pump. See Main
Board Removal and Install step 3 for
position of J3. 6 V DC.
Check the crimp on the pump connector.
Bad Pump.
Replace pump. See Pump and Filter
Replacement.

TSI Instruments Aerotrak 9303 Specifications

General

Size Range .	0.3 to 25 µm
Channel Sizes .	0.3 µm and 5.0 µm fixed; 0.5, 1.0, 2.0, or 2.5 µm selectable middle channel.
Counting Efficiency .	50% at 0.3 µm; 100% for particles > 0.45 µm (per ISO 21501-4 and JIS)
Concentration Limits .	2, 000, 000 particles/ft3 at 5% coincidence loss
Zero Count Level .	<1 count / 5 minutes (per ISO 21501-4 and JIS B9921)
Flow Rate .	0.1 CFM (2.83 L/min)
Calibration .	NIST traceable with TSI® calibration system
Sampling Modes .	Manual and automatic
Sampling Time .	1 second to 99 minutes 59 seconds
Sampling Frequency .	1 to 999 cycles or continuous
Light Source .	Long life laser diode
Sample Probe/Tubing .	Isokinetic sampling probe
Exhaust .	Internal HEPA filter
Vacuum Source .	Internal pump
External Surface .	High impact injection molded plastic
Communication Mode .	USB serial output
Data Storage .	1, 500 sample records
Status Indicators .	Low battery and service
Display .	3.2-in. (8.1 cm) 160 x 160 monochrome LCD
AC Power . (power to AC adapter)	110 to 240 VAC 50-60 Hz Universal in-line power supply with country specific plugs
DC Power . (power to instrument)	9 VDC @ 1.5 A
Battery .	Rechargeable Li-Ion
Battery Life .	Up to 4.5 hours of continuous use
Recharge Time .	< 3 hours

Weight and Dimensions

Dimensions (L x W x H)	9.1 x 6.3 x 2.4 in. (23 x 11 x 6.2 cm) (without isokinetic inlet)
Weight .	1.3 lbs (0.58 kg) with battery