Bacharach Gas Pup, Instruction

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Instruction 55-9002 1
Gas Pup Introduction
Introduction
General Description
The Bacharach Gas Pup (Figure 1)
is a natural gas detection instru-
ment designed for general leak
detection, barholing operations,
regulator pressure checks, and line
pressure integrity operations. It
offers measurement of natural gas
(as methane) in the following three
ranges:
• PPM (Low) Range: Gas level
displayed in 0 to 2500 ppm as a
bar graph, allowing visual indica-
tion of the peak reading. Useful
for locating leaks in piping.
• LO% (Mid Percent) Range:
Measures natural gas in the
range of 0.2–5.0% by volume,
which corresponds to the lower
explosive limit (LEL) of methane.
• HI% (High Percent) Range: 0–100% by volume is useful in “pin
pointing” leaks in underground piping through barhole testing
The Gas Pup also features three pressure modes: High (0 to 99 psig);
Low (–9.9 to 9.9 psig); and Delta (displays a pressure change in the range
of ±9.9 psig from any reference pressure between 0 and 90 psig).
Three ‘AA’ batteries power the instrument. Pressing the key for at
least 1 second turns the instrument ON; after which, the battery voltage
is briefly displayed, followed by the gas and pressure sensors being
zeroed, and then followed by the display of the detected gas level.
The Gas Pup’s gas display is auto ranging, automatically switching
between its PPM, LO%, and HI% ranges as the detected gas level rises
and falls. The Gas Pup’s pressure-operating mode is selected by pressing
the
key while the word “GAS” is being displayed during the
instrument’s warm-up period.
Figure 1. Gas Pup shown with
Probe and Coiled Tubing