Heron FAQ’s

dipperLog groundwater data logger

Q. Is the dipperLog battery user replaceable?
A– Under normal use, the battery should last approximately 10 years. If for some reason the battery does need replacing, it will need to be shipped back to Heron Instruments for replacement.

Q. Can the dipperLog be deployed in areas that are subject to freezing?
A– The dipperLog will operate at temperatures below freezing, however if ice forms on the
pressure sensor, damage could occur.

Q. What is the difference between vented and absolute (Non Vented) groundwater data loggers?
A– The Heron dipperLog is an absolute logger. This means it will sense pressure from the water and from the air. As we are only interested in water pressure only in this application a separate logger called the barLog is require to log the air pressure so it can compensate the logged data at the time of download. The cable on an absolute logger does not have the vent tube running from top to bottom as in the vented loggers. Vent tubes can allow for barometric changes but also make the cable and logger susceptible to leaks. Desiccant packs require regular maintenance that, if avoided can cause damage to the logger and loss of data. For a water tight solution and lower maintenance requirements Heron Instruments chooses the absolute version for the dipperLog groundwater data logger.

Q. Why do I need the barLog along with the dipperLog?
A– The Heron dipperLog uses absolute cable for the Direct Read Down Hole Version. The barLog will be located outside the well to compensate for barometric pressure. Download the barLog before your dipperLogs and the Heron software will automatically compensate for the barometric pressure.

Q. How do I setup the barLog to work with the dipperLog?
A– The barLog setup is very easy. All you need to do is program the barLog with the exact same job number as your dipperLog(s), and the software will take care of the rest.

Q. Will the dipperLog be damaged if it’s submerged under more water than it’s maximum rating?
A– The dipperLog can withstand 2 times it’s rated pressure before damage will occur.

Q. What pressure range do I need?
A– Pressure range refers to the maximum recordable amount of water above the dipperLog. It is best to select the pressure range greater than the maximum expected height of water above the dipperLog.

The dipperLog is available in these pressure ranges:

A _ Barometric
B _ 0 – 35FT or 0 – 10M
C _ 0 – 100FT or 0 – 30M
D _ 0 – 200FT or 0 – 60M
E _ 0 – 400FT or 0- 120M

H.OIL and Sm.OIL oil/water interface meters

Q. What does the Interface Meter detect ?
A-The meter will detect any fluid heavier than air.
When the probe enters a fluid it checks the electrical conductivity of the fluid.
If the fluid does not conduct electricity then it signals “product” and if the fluid does conduct electricity it signals “water”

Q. Will the Meter detect sinking product (DNAPL).

Q. Why does the meter not work when I am testing it out of the well ?
A– The probe is being washed out by ambient infrared light from the sun or incandescent light. Shield the probe from sunlight or test the unit in a dark space.

Q. How do I know if the battery needs replacing?
A-When the green “on” light flashes in unison with the red “fluid” light in water.

Q. Why does the unit have a “grounding lead” ?

A-The grounding lead is a requirement of the Intrinsic Safety certification. At all times during use the unit should be attached to a suitable grounding point. For observation wells with steel casings it can be attached to the casing. For wells with PVC casing it may be attached to the metal body of the well protector, if it is sunk into the ground, a suitable metal rod driven into the ground will serve as a grounding point. (check for cables etc before driving the metal rod )

When working in Fuel Stations, Refineries etc, check local grounding regulations with
the safety manager.

Q. What do I use to clean the probe tip?
A– Heron suggests diluted dishwashing detergent for general clean

A– Heron suggests diluted dishwashing detergent for general cleaning. A– Heron suggests diluted dishwashing detergent for general clean
For biological decontamination use a mildly diluted bleach solution followed by a wash down with distilled or deionised water or follow locally mandated procedures. Avoid using solvents.

Q. I changed the battery and cleaned the probe but the meter still does not work.
A-Make sure the two panel knobs securing the electronic panel to the unit are tight. (both of them.
Make sure the battery is installed with the correct polarity.
Refer to the third question.

Q. I need to have the instrument serviced or repaired.
A– Contact your supplier or complete the Heron RMA form.

Water Level Meters – dipperT, Water Tape, Little Dipper

Q. Why does the meter not work when I put it in water?
A– Do not test the instrument in distilled or deionised water.
Make sure the two thumb screws holding the electronic panel onto the reel are tight.
Turn the sensitivity control to maximum sensitivity (fully clockwise)
Is battery low? Press the button on the electronic panel to check the battery.
Check the continuity between the probe and the electronics in the panel by shorting the tip of the probe on the bullet nosed pin on the back of the instrument and the body of the probe with the adjacent screw and stand off to the left of the pin. If the probe sounds, the continuity is OK but may be intermittent. Continue holding the probe in this position and flex the black link back and forth. If this causes the signal to sound on and off this indicates a break in the link that requires a repair.

Q. If the unit works when tested in tap water but not in well water it may be that the well water is extremely pure. The lower level of purity (conductivity) that the unit will work on is 13 micro S +/_5%.
A– If you are measuring water at these conductivity levels, contact Heron Instruments and ask about a low conductivity panel.
If all the above fails to correct the problem them please contact your distributor or Heron Instruments direct at 1-800-331-2032 or contact us here

Q. Where is the ON/OFF switch?
A– There is no switch. The water acts as a switch, the knob in the centre of the panel adjusts the sensitivity of the unit to give clear and unambiguous signals. The unit does not consume any power when it is not in water.

Q. Can I use the unit to dip the bottom of the well?
A– Yes, the probe is fully depth rated to the length of the tape.

Q. What do I use to clean the tape, reel and probe?
A– Heron suggests diluted dishwashing detergent for general cleaning.
For biological decontamination use a mildly diluted bleach solution followed by a wash down with distilled or deionised water or follow locally mandated procedures.


FAQ – Service & Returns

Q. What information do I need when shipping my field equipment back for Service?
A– Complete the RMA request form (click here for RMA request form) and submit to Heron Instruments to receive a RMA number. This number should be clearly marked on the OUTSIDE of the box.
Inside the box include your name, company name, address and phone number and a brief description of what issues you are experiencing with unit.
Heron return addresses are available on the RMA Request page.

Q. How long will it take to repair our equipment?
A– The standard turn around time for repairing a field equipment is two weeks. Should you require expedited service, please contact Heron Instruments directly.

Q. Will my service/repair be covered under warranty?
A-Warranty claims will be assessed by the service staff. To view the complete Heron Warranty please follow this link. Warranty Information


Water Level Field Form
Using a Graduated Tape