tpi 720b Combustible Gas Leak Detector Instruction Manual

tpi 720b Combustible Gas Leak Detector

Specifications

• Power Supply:             2 “C” Alkaline Batteries
• Sensor: Sensitivity:      Solid State
• Warm-up:                   10 ppm Methane
• Response time:          Approx 1 minute
• Duty Cycle:               Instantaneous Continuous
• Battery Life:              Approx. 30 hrs.
• Size:                          3.0″ x 9.5″ x 1.75″
• Weight:                      (77 x 240 x 47) mm 1.1 lbs (500g)
• Probe Length:            16″ (406mm)

Product Features

Standard Accessories

• Sensor                                A739
• Instruction Manual            720b Instruction Manual
• Soft Pouch                        A700

Optional Accessories

• Hard Case                        A714
• Earphone                        A710

General Description

The 720b is an advanced state-of-the-art leak detector capable of detecting many combustible, noncombustible and toxic gases.
The following is a partial list of gases that the 720b is sensitive to:
Acetone, Alcohol, Ammonia, Steam, Carbon Monoxide, Butane, Gasoline, Jet Fuel, Hydrogen Sulfide, Smoke, Industrial Solvents, Methane, Lacquer Thinner, Naphtha, Propane, Natural Gas.
Not to be used to quantify the amount of CO present.

Operating Instructions

1. Turn the unit on in an uncontaminated environment (clean air away from the system in question) by moving the switch from the OFF position to the ON position.
2. The GREEN ready light will illuminate if there is ample battery power. The RED LED may flicker and the tick may sound during the warm-up. To silence the tick, rotate the thumb wheel fully counterclockwise.
3. Adjust the TICK ADJUST by rotating the thumbwheel in a clockwise direction until a uniform ticking sound is heard. The RED light will flash at the same time the tick sounds.
4. Approach suspected leak areas with the sensor until the tick begins to increase. When the tick increases, do not move the sensor from the area, rotate the TICK ADJUST slightly counterclock-wise to slow the ticking and continue to approach the suspected leak area with the sen-sor. Continue to slow the tick until the location of the leak is found. If the tick stops, the con-centration level has decreased. Move back in the opposite direction to find the leak again.
5. If the GREEN LED changes to orange color, change the batteries.
6. An earphone can be plugged into the earphone jack when using the instrument in noisy environments.
7. If the instrument does not perform or it has been damaged, follow the Operation Check section of this manual.

Battery Replacement

1. Remove the battery compartment cover from the bottom of the handle by sliding the door away from the front side of the instrument.
2. Remove the batteries and replace by sliding the negative (-) end of the batteries in first.
3. Replace the battery cover by sliding the door into the slots provided in the handle and allow it to snap into place.
4. For best performance use quality alkaline batteries.

Operation Check

To verify the operation of the 720b simply turn the unit on and allow it to warm up for approxi-mately 1 minute. Expose the sensor to a known gas source such as an unlit butane lighter. The tick should increase when the gas in applied. The tick will decrease when the gas is removed. If the unit fails to respond, the sensor may need replacing or the unit may need to be sent in for repair:
CAUTION: This unit must be sent to a factory authorized repair center for all repairs.

Sensor Replacement

1. Turn the 720b off.
2. Pull off the sensor cap.
3. Unplug the old sensor and discard.
4. Replace sensor and sensor cap.
5. Turn on unit and perform “Operation Check”

Warranty and repair/exchange policy

Your TPI 720b is warranted to be free from defects in materials and workmanship for a peri-od of one year after purchase (excluding sensor, calibration and batteries). If within the warranty period your instrument should become inopera-tive from such defects, the unit will be repaired or replaced at our option. This warranty covers normal use and does not cover damage which results from alteration, tampering, accident, misuse, abuse, neglect or improper
maintenance. A purchase receipt or other proof of original date of purchase will be required before warranty performance will be rendered. Instruments out of warranty will be repaired for a service charge.
Visit
www.tpieurope.com/faults-repairs/
for further information
This warranty gives you specific legal rights and you may also have other right which vary from state to state.

References

• Test Products International - USA
• Faults & Repairs | TPI Europe

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