Troubleshooting - Signet 8550-1 Installation Manual

Troubleshooting

Display Condition
"- - - - -"
"Pulse Overrun Output1"
"Value must be more than 0"
Open Collector is always
activated
‡ SIGNET
Signet Scientific Company, 3401 Aerojet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. (626) 571-2770 • Fax (626) 573-2057
For Worldwide Sales and Service, visit our website: gfsignet.com • Or call (in the U.S.): (800) 854-4090
GEORGE FISCHER ‡ Piping Systems
3-8550.090-1/(C-3/01) English
page 8 of 8
Possible Causes
Flow rate exceeds display capability
• Open Collector pulse rate exceeds
maximum of 300 pulses per minute.
• Pulse width set too wide.
K-factors cannot be set to 0.
• Hysteresis value too large
• Defective transmitter
© Scientific Company 1999
Suggested Solutions
• Increase Flow units time base
• Move flow decimal one place to the right
• Increase Pulse volume setting
• Decrease pulse width setting.
• Reduce system flow rate
Enter K-factor from 0.0001 to 99999
• Change the hysteresis value
• Replace transmitter
Printed in U.S.A. on Recycled Paper
‡ SIGNET 8550-1 Flow Transmitter