CHAPTER 6
103
2.
Check the fuses for both negative and positive leads. Use 2 amp fast blow fuses for 12 Vdc
applications and 1 amp fast blow fuses for 24 Vdc applications. Blown fuses could indicate a
shorted VSL line. Isolate the short by disconnecting sections of the VSL line and checking for
proper meter operation. Another way to check for a shorted line is to disconnect the green and
white from the back of the meter. Measure the resistance between the green and white wire. It
should be greater than 1000 ohms. This method can be used to check different sections of the
VSL line to isolate the short circuit.
3.
Inspect and replace any connection or 2-wire VSL cable that may show signs of being pinched
or crushed as this could cause either open circuits or shorted lines.
4.
To check for an open VSL line, ohm the VSL Vulcoder line by disconnecting and twisting the
green and white wires together at the back of the meter. Disconnect each Vulcoder from the
VSL Vulcoder line. There should be no resistance detected when measuring between the green
and white wires at the Vulcoder hook up point.
5.
To check for a bad Vulcoder,
disconnect
each Vulcoder from the VSL line and power up the
meter. If the meter powers up, connect one Vulcoder at a time and manually resequence the
Vulcoder before restarting the meter.
6. Replace
meter.
6.4.6
CONDITION: Meter Displays "LO-LO"
If the meter encounters a low voltage situation, either on the power input lead or the VSL line, the
meter will display
"LO-LO"
and then switch to
"1 90"
, one meaning the input power is low and
the 90 being the amount of voltage (9.0 Vdc) being read by the meter. If the meter displays
"LO-
LO"
and then switches to
"2 0"
, two meaning the VSL line is low and the number being the
amount of voltage being read by the meter.
Possible Causes For "LO-LO" and "1 XX":
1.
Corroded fuses or corroded or bad meter cable connections to the battery.
2.
Battery is low (under 10.5 Volts).
3.
Damaged power or ground cable.
4. Faulty
Meter
What to Do:
1.
Using a voltmeter, check the power at the back of the meter. When the meter is turned on and
off, the power should not change more than
1/2
Volt. Turn off the meter either by the key or
truck battery switch for a few seconds and then turn on again. If the meter still does not work,
proceed to step 2.
June 21, 2006
VULCAN ON-BOARD SCALES 1-800-237-0022
Doc. 44-10032-001 Rev. C
©
STRESS-TEK, INC. 2006
