In-Situ Oil/Water Interface Meter Instruction Sheet - Manual (Page 2)

Page 2
Tips for Using the Interface Meter
How it Works
In Air:
The infrared emitter sends out an I/R beam inside a 45
degree prism. The I/R beam reflects off the internal face
of the prism to the opposite face, which then reflects
the beam to the detector. In this state the instrument is
silent.
In Fluid:
Fluids are denser than air, so Snell’s law applies. The I/R
beam is not reflected internally, but exits the prism. The
detector does not detect the I/R beam. In this state, the
instrument emits a tone and the red light is on.
At the same time, the two capacitance probes are
testing for conductance. If the fluid does not conduct
electricity, the sound tone and light are continuous and
indicate the probe has detected LNAPL.
If the fluid does conduct electricity, the tone is
intermittent and indicates the probe has detected
water.
Care of the Reel
Remove the electronic front panel before washing the
reel. Please consider using biodegradable household
dish washing liquid.
The reel may be cleaned with the following:
Soap solution, Fantastic®, Windex®, Joy®, Top Job®, Mr.
Clean®, Formula 409®, GOO-GONE®, or Green Clean®.
Care of the Tape and Probe
The tape and probe may be cleaned and degreased
with the following:
Soap solution, Fantastic®, Windex®, Joy®, Top Job®, Mr.
Clean®, Formula 409®, GOO-GONE®, or Green Clean®.
Do not clean with abrasives
The probe lens is made from an amorphous
thermoplastic, highly resistant to many chemicals, but it
can be scratched by abrasive cleaners.
Troubleshooting
Question
Why do I hear a continuous sound when the probe is
out of liquid?
Answer
The panel may have been removed and replaced
upside-down. The battery box must be at the top, and
the winding handle at the bottom.
Problem
I switch the instrument on, try it in water and oil, but
nothing happens.
Solution
Check the battery. If the green light is off, replace the
battery. Check polarity of the battery. Ensure that it is
installed properly.
Problem
The battery is OK, the green light is on, but the
instrument still does not work.
Solution
You are testing the unit in daylight or incandescent
light. Test the unit away from these infrared light
sources. The infrared light is interfering with the
electronics of the probe.
Problem
The battery is OK, the green light is on, and I am not in
an infrared light area, but the instrument does not work.
Solution
Check the polarity and connections of the removable
electronic panel. When the handle is at the bottom, the
black wire in the hub should be on the right-hand screw
as you face the unit. Check for broken on loose wires.
Check for corrosion or dirt on the contact strips on the
back of the panel, and if they are dirty, clean them.
Problem
The battery is OK, the green light is on, and I am not in
an infrared light area. I am testing the unit in water, and I
hear a continuous tone that indicates LNAPL, not water.
Solution
Make sure you are not using distilled or deionized water.