Floscan TwinScan GPH/LPH Meter - Manual (Page 18)

8/30/2004 1000-204-00C
FloScan Instrument Company, Inc. Tel: (206) 524-6625 Fax: (206) 523-4961
3016 NE Blakeley Street, Seattle, WA 98105 Email: [email protected] Http://www.floscan.com
TROUBLESHOOTING
TwinScan
®
3” Instrument - Gallons Per Hour (LCD)
BEFORE CALLING FOR ASSISTANCE, COMPLETE THESE TROUBLESHOOTING CHECKS AND RECORD YOUR
FINDINGS. TECHNICAL SUPPORT REQUIRES THIS INFORMATION BEFORE A RETURN AUTHORIZATION WILL BE
ISSUED. IT TAKES ABOUT 20 MINUTES AND IS VERY IMPORTANT IN ANALYZING SYSTEM PROBLEMS.
Before starting, record instrument model number and switch settings.
MODEL # _____________________
SERIAL # ____________
RED SWITCH POSITION __________
BLACK SWITCH POSITION _________
Perform the Instrument Diagnostic & Duty Cycle Tests outlined in Sections I & II First. Record your findings.
I. INSTRUMENT DIAGNOSTIC SELF-TEST
• Secure power to the Red, and Red/White wires, (Turn both key switches OFF).
• Turn power on, (Either to one or both switches). At start-up, the instrument automatically performs a, “Self-test”.
• Verify that the pointer’s back-lighting glows Red, and that the LCD back-light is glowing Green.
• Observe that the pointers smoothly sweep to near full scale, (Slightly above or below) then smoothly drop back to zero.
The LCD display shows the following numbers and letters in sequence. These are examples, actual readings may vary. Switch settings
and configurations are shown on the LCD as, “0123456789AbCdEF”.
8.8.8.8 LCD segment and back-lighting check.
1.21
Software version number.
F 3 Red, (Port) and Black (Starboard) switch settings.
- - 34 Internal configuration (scale range, units, etc.)
Blank
123.4 Current total gallons or total liters, (Indicates normal operation).
• Record the software version __________ and switch settings _____ _____. FloScan Technical Support will ask for these.
The self-test verifies adequate power, a good ground, that the pointers move, and the LCD display is working.
If the self-test fails, the LCD shows, “PO” plus a two-digit number code. The pointers also show the error number as a, “Blink Code”.
Sitting near center scale the pointers will twitch upwards, showing a numeric value. For Po23 the pointers twitch twice, pause for a
moment, and then twitch three times. After a long wait the twitching resumes. This continues until power is secured. If the self-test
fails, verify that supply voltage is at least 10 VDC. If voltage drops below 10V, the self-test may fail.
II. DUTY CYCLE TEST
• Start both engines and run at idle.
• Close and open the RESET switch twice within 0.6 seconds—like double-clicking a computer mouse.
• The LCD will show dcy when it’s in duty cycle check mode.
• With the display showing dcy the pointers should remain steady and in the middle third of their scales.
• At very low flow rates, the pointers track the on/off signal from each sensor and will wiggle.
• Increase engine rpm until the pointers are steady.
• Steady readings with occasional, “Hick-ups” may indicate air or vapor bubbles passing through the sender.
• “Double-click” the RESET switch to return to the normal fuel flow display mode.