Troubleshooting - Signet 9900 Operating Instructions Manual

Troubleshooting

Condition
Wrong Sensor
Wrong Code
K-Factor Out Of Range
Backlight inoperative
Relays 2 and 3
inoperative
Relay LEDs inoperative
Open Collector (R1) or
Relay (R2 or R3)
always on
OVR relay state
(Pulse Overrun)
– – – – –
Possible Causes
Incorrect sensor installed
Sensor Type set incorrectly in 9900
Wrong password entered
K-Factors cannot be set to 0
9900 operating on loop power
Backlight turned OFF
(NOTE: Backlight can turn off
automatically in AUTO mode)
9900 operating on loop power
Relay Module installed incorrectly
Wrong settings in RELAY menu
9900 operating in Loop Power
Hysteresis value too large
Defective Relay Module
Relay pulse rate exceeds maximum of
300 pulses per minute.
Pulse width set too wide
(NOTE: Max pulse rate = 300; max pulse width = 100 mS.
Flow rate exceeds display capability
Suggested Solution
Connect correct sensor
Set correct sensor TYPE in INPUT menu
(see page 25)
Enter correct password (see page 26)
Enter K-Factor from 0.0001 to 99999
Connect 9900 to 10.8 to 35.2 VDC power.
Set BACKLIGHT to LOW, HIGH or AUTO
in OPTION menu.
Connect 9900 to 10.8 to 35.2 VDC power.
Remove and reseat relay module
Use test relay to verify relay operation then
check relay settings.
Use DC power. Check relay states in VIEW
mode for status.
Change the hysteresis value
Replace Relay Module
Increase volume pulse setting
Reduce system fl ow rate
Decrease pulse width
Increase Flow units time base
Change unit of measure
9900 Transmitter 49