Dwyer DMF - Manual (Page 20)

8. TROUBLESHOOTING
8.1 Common Conditions
Your Mass Flow Controller was thoroughly checked at numerous quality control
points during and after manufacturing and assembly operations. It was calibrat-
ed in accordance to your desired flow and pressure conditions for a given gas or
a mixture of gases.
It was carefully packed to prevent damage during shipment. Should you feel that
the instrument is not functioning properly please check for the following common
conditions first:
Are all cables connected correctly?
Are there any leaks in the installation?
Is the power supply correctly selected according to requirements? When several
meters are used a power supply with appropriate current rating should be selected.
Were the connector pinouts matched properly? When interchanging with other
manufacturers' equipment, cables and connectors must be carefully wired for cor-
rect pin configurations.
Is the pressure differential across the instrument sufficient?
For best results it is recommended that instruments are returned to the factory
for servicing. See section 1.3 for return procedures.
8.2 Technical Assistance
Dwyer Instruments will provide technical assistance over the phone to qualified
repair personnel. Please call our Technical Assistance at (219) 879-8000.
Please have your Serial Number and Model Number ready when you call.
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