Bacharach H-10G Owner's Manual

H-10G

Congratulations! You have just
purchased the most versatile,
high perfor mance service leak
detector available in the indus­try today. It will detect refriger­ants with a sensitivity that will
effectively pinpoint both small
and large leaks quickly and
effici ently. We encourage your
review of this manual to assure
satisfactory p er fo rmanc e and a
long service life.

Refrigerant
Leak Detector

Condensed Instructions

1. Plug power cord into an appropriate AC
outlet and let unit warm up for 2 minutes.

2. Check flotation of airflow ball in probe tip.

3. Set Leak Size switch to SM(cal) position.

4. Adjust Balance Control until unit ticks
slowly (1–3 ticks per second).

5. Place probe tip over Calibrate Reference
Bottle (remove cap disc from bottle) and
check for faster audio and flashing lamp.

6. Probe for leaks.

7. For other sensitivity ranges, set Leak
Size switch and readjust Balance
Control for 1–3 ticks per second.

WARNING: This deviceis not to be
used in any application that is beyond
its intended purpose or beyond the
scope of its specifications. For details
on appropriate use, refer to the gen­eral model description, application, and
operation discussions in this manual.
Before risking equipment damage or
personal injury, contact Bacharach if you
are unsure of the validity of a particular
combustion analyzer application.

Model Description

The H-10G Halogen Leak Detector
consists of a control unit, a probe with
4-1/2 ft of hose, and an 8 ft power cord,
all housed in a shock-resistant case.
The control unit contains a printed cir­cuit board amplifier, plug-in sensor, air
pump, power transformer, and speaker
housed beneath the chassis cover. A
calibrate reference leak bottle, leak size
switch, balance control, and power switch
are located on the top of the control
chassis. An AC power cord is attached
on the inside left of the control chassis. A

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screwdriver adjustable sensor heat con­trol is located on the bottom of the unit.
The probe nozzle consists of a trans­parent tip, airflow ball, filter, and neon
leak-signal lamp, connected to the con­trol chassis by a length of flexible tubing.
The calibrated reference leak is a
removal bottle containing halogen gas
R11, and is calibrated to provide a leak
equivalent to approximately 0.5 ounce
per year of R134a. As an accessory, a
maintenance kit is provided that contains
extra filters and airflow balls.

Application

The H-10G is intended principally for
use as a serviceman’s tool, although it
also can be used for production line leak
testing. It was developed in response
to an industry that is in the process of
converting to more environmentally safe
refrigerants worldwide. Ozone depleting
chlorine is being reduced or eliminated in
most refrigerants. To adequately leak test
refrigerants like R123 and fluorine based
R134a, a higher detector sensitivity is
required. The H-10G has the capabil­ity to detect small leaks for all current
chlorine based refrigerants as well as the
new fluorine based R134a or new blends
under development. When using the
H-10G you can be confident it has the
sensitivity to meet your service needs of
today and the capability of meeting your
needs in the years to come.
Please note that heavy gas contamina­tion in the testing area may cause erratic
operation of the H-10G. This can occur
when the leak in the system is very
large and there is little or no ventilation
in the testing area. Contamination of an

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area may also occur where excessive
amounts of refrigerants are vented.
The H-10G cannot differentiate
between atmospheric contamination and
an actual leak because it will respond to
any halogen gas passing over the heat­ed sensor. However, a large leak often
still can be located and the background
contamination discriminated against by
switching to the LG leak range.
A contaminated condition can be
improved greatly by ventilating or isolat­ing the leak-check area.

Important: Avoid placing the probe directly
in a stream of concentrated halogen, as this
will drastically shorten the sensor life.

Operating Instructions

1. Before using the H-10G for the first
time, remove the paper disc from the
cap on the calibrate reference bottle
(fig. 1) and allow a few minutes for the
leak rate to stabilize. This disc is used
to avoid evaporation and should be
replaced after calibration. Be certain that
the bottle contains a quantity of halogen
R11. The liquid level can be observed
by pulling the bottle up from its spring
retainer clip and out of the panel. Initially
this bottle is filled with enough halogen
to last approximately 6 months.

2. Plug the power cord (fig. 1) into a
50/60 Hz AC outlet of the nominal volt­age as listed on the unit’s rating plate.

3. The H-10G will start to warm up when
the power cord is plugged into an AC
outlet and the power switch is turned on.
Allow 2 minutes for warm-up.

4. Check for sufficient airflow by pointing
the probe tip toward the floor, covering

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Figure 1

power cord

calibrate
reference
bottle

power
switch

control unit chassis

speaker

balance control

probe tip

sensor
cover

flexible
hose

leak size
switch

Caution: The H-10G is available for operation

on either 110, 120, 220/230, or 240V AC. Operate
the unit only on the proper supply voltage (as
shown on the rating plate); otherwise the unit
could be damaged.

Warning! Personal Injury Hazard

Do not use the H-10G in an explosive or com­bustible atmosphere. The ambient atmosphere is
drawn through the probe and through the sensor,
which operates at approximately 1000°F (540°C).
The resulting hot mixture of air and combustible
gas could explode.

the tip with your finger, then releasing
your finger. If proper flow exists, the
red ball should noticeably rise up into
the probe when you uncover the probe
tip. Note that the actual height and
final resting position of the red ball are
not important. See Figure 2.

If the airflow ball does not rise:

- Tap the probe lightly to ensure
the ball is not sticking.

- Check the filter in the probe tip,
as described in the Maintenance
section.
If the flow is still insufficient, then the

unit should be forwarded for repair to
the nearest Authorized Service Center.

5. Place the leak size switch (fig. 1) in
the SM(cal) position.

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Figure 2

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Figure

6. Adjust the balance control (fig. 1) until
the audio ticks slowly, about 1–3 ticks
per second. The neon lamp in the
probe (fig. 2 and fig. 3) will also flash,
but much more slowly.

7. Place the probe tip over the hole in
the cap of the calibrate reference
bottle for 2–3 seconds. This allows
enough time for the H-10G to pump
down the concentration of gas which
normally collects around the bottle’s
outlet, and thus arrive at a steady
state response (be sure that the bottle
contains a quantity of refrigerant). The
neon lamp in the probe should flash
rapidly, and the audio pitch should
increase markedly, but then back off
somewhat from the saturated, full­scale howl.

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