Gammon GTP-323 Manuale operativo - Pagina 5

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CARE OF THE PHOTOCELL COMPARATOR (INSTRUMENT PACK) continued

2. Green glass filters broken - Return the instrument pack to the factory for replacement of the filter

3. Meter needle broken, stuck, or disengaged - Return the instrument pack to the factory for repair or replacement,

depending upon extent of damage. To determine whether this type of damage has occurred, remove the instrument

pack and hold it horizontally. Observe the pointer as you move the meter right and left. The needle should smoothly

move a bit to each side and then re-center. Now push and hold the button and shade the photocells, first one, then

the other. The needle should move quickly and smoothly from side to side. Release the button and the needle

should re-center. If the needle moves in jumps, the meter is damaged. If the needle moves slowly, the battery is

likely depleted. If it does not move at all, the battery needs to be replaced.

CARE OF THE COMPARATOR CHAMBER

The inside surfaces of the chamber must be kept clean. Dust and dirt often glows brilliantly in ultraviolet light and this will

cause a reading error. To test for such dirt, turn on the light in a dark room with the instrument pack removed. Remove all

glowing particles inside of the comparator chamber, being careful not to scratch off the black paint. Do not move or remove

the iris diaphragm from its installed position because it has been carefully positioned at the factory and cannot be reset in

the field without a special gauging tool.

COMMENT

The water content of jet fuel is constantly changing as the humidity of the air above it changes. Temperature has a substantial

influence. As a general rule, 1 ppm of water will come out of solution for every degree of temperature reduction if the fuel

sample is water saturated. The average jet fuel will have about 70 ppm of water in solution at 70°F. At 60°F, the dissolved

content is only 60 ppm. Sampling connections that are long enough to permit temperature changes will always cause

unreliable results. If cooling takes place, the reading will be high and vice versa.

It is possible for free water to remain for several hours in jet fuel that is not saturated. Why water will dissolve almost instantly

up to saturation in one jet fuel and not in another has never been explained.

The Aqua-Glo Water Detector Kit has been used very extensively in the testing of filter separators. The Aqua Glo method

only measures the free water - undissolved. It does not detect dissolved water, which monitors and filter separators cannot

remove.

NOTE

The Aqua-Glo Water Detector Kit Series V replaced the Series III in 2005. We are pleased to advise you that several

improvements have been made:

1. The power supply is external. It is easily replaced if necessary without taking the Aqua-Glo apart, as was necessary

before.

2. The power supply is modern, self-switching and regulating. It will perform properly on 120 VAC to 240 VAC, 50/60

Hz. We will no longer have two models for different power..

3. There is no change in the ASTM test method procedure or calibration because only the power supply to the UV bulb

was changed.

4. The new Series V light unit is much more field repairable. See Field Repair for details.

OVERHAUL AND REPAIR POLICY

If the Aqua-Glo ever needs more complete repair than can be done in the field, return it to the factory using the procedure

below:

1. Call our Order Entry department at 1-800-524-0287, fax 732-223-5778 or email us at gammontech@gammontech.

com.

2. Request a RFR (Returned for Repair) number and mark your package with this number.

3. Ship the complete instrument to us, including the calibrating standard, well packed and insured. You may leave the

unit in the carrying case, but properly packaged.

4. We will examine the Aqua-Glo and advise you of the estimated price to repair it. If the unit is under 12 months old

and has not been abused, the repair will be at no charge.

5. Should you decide not to repair the Aqua-Glo, we will return it at no charge, at our expense.

FIELD REPAIR

(Voltage testing must be done by a qualified technician)

1. If the bulb will not light on AC or Internal Battery power, remove the power supply, turn off and replace the bulb.

2. Do NOT attempt to repair the instrument pack, except to replace the 9 volt meter battery.

3. Do NOT attempt to replace or repair the iris in the base except to replace the lever, should it loosen