Bacharach H-10G User manual

H-10GRefrigerant

Leak Detector

Congratulations! You have just

purchased the most versatile,

high performance service leak

detector available in the indus-

try today. It will detect refriger-

ants with a sensitivity that will

effectively pinpoint both small

and large leaks quickly and

efficiently. We encourage your

review of this manual to assure

satisfactory performance and a

long service life.

Condensed Instructions

1. Plug power cord into an appropriateAC

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 gen-

eral 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 cir-

cuit 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

screwdriver adjustable sensor heat con-

trol is located on the bottom of the unit.

The probe nozzle consists of a trans-

parent tip, airflow ball, filter, and neon

leak-signal lamp, connected to the con-

trol 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 capabil-

ity 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 contamina-

tion 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

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 heat-

ed 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 isolat-

ing 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 volt-

age 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

control unit chassis balance control

leak size

switch

sensor

cover

probe tip

speaker

calibrate

reference

bottle flexible

hose

power cord

power

switch

Figure 1

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.

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.

Warning! Personal Injury Hazard

Do not use the H-10G in an explosive or com-

bustible 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.

Figure 2

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, full-

scale howl.

ure

The calibrate reference bottle may

be used as often as necessary to

assure proper operation of determin-

ing the size of the leak. A leak that

causes an audio pitch about equal to

that produced by the calibrate refer-

ence has a leak rate of approximately

the same size, 0.5 ounce per year of

halogen R134a.

Proper unit response during the

R134a calibration reference test above

verifies proper sensitivity and opera-

tion for all three test positions: small,

medium, or large for either chlorine or

fluorine based refrigerants. Please refer

to the Product Sensitivity Levels chart

on the pocket of the inside lid, or see

this manual’s Specifications section.

The term R12 sensitivity is used to

represent chlorine based refrigerants

such as R12, R22, R123, etc. Use

the medium sensitivity switch position

to locate 0.5 oz/yr or greater leaks

of these type refrigerants. The term

R134a ratings apply to the most difficult

to detect, like fluorine based R134a or

SF6. Use the small sensitivity switch

position to locate 0.5 oz/yr or greater

leaks of these type refrigerants.

8. Hold the probe as close as possible

to the area being tested and move

neon lamp

airflow ball

filter

calibrate reference

bottle

Figure 3

the tip at about one inch per second

along seams or joints suspected of

leaking. When the probe encoun-

ters a leak, both the audio pitch and

the flashing rate of the neon lamp

will increase. Both will continue to

respond at the faster rate as long as

the probe is held at the leak.

9. For detecting much larger or smaller

leaks, set the leak size switch to the

appropriate range LG or MED, readjust

the balance control for slow ticking

(1–3 ticks per second), and probe

for leaks as in the previous step. The

calibrate reference cannot be used to

calibrate these two ranges. The factory,

however, can supply leak standards

of any value required for verification of

capability to specific leak rates.

Sensor Life Extension

The H-10G provides a sensor adjust-

ment that substantially extends sensor

life. This procedure also provides for a

more accurately calibrated sensitivity

throughout the sensor life, and allows

compensation for abnormally high or low

line voltages (see Maintenance section).

The sensor heat control is a screw-

driver adjustment accessible through a

hole on the bottom of the case. As the

H-10G is used and the sensor ages, its

sensitivity will gradually decrease.

The overall sensitivity and calibra-

tion of the H-10G may be restored by

gradually adjusting the sensor heat

control clockwise until finally, with a fully

aged sensor, the control knob will be

turned clockwise to indicate 2 o’clock

(fig. 4). After that, when the sensor

fails to respond properly, replace the

sensor following the procedure in the

Maintenance section and readjust the

sensor heat control back to 7 o’clock

(fig. 4) and perform calibration.

When making sensor adjustments,

move the sensor heat control in small

increments, either up or down, as appro-

priate. After each adjustment wait about

30 seconds for the sensor temperature

to stabilize, then check the sensitivity

as described in steps 5, 6, and 7, in the

Operating Instructions section.

Note: For best sensor life, avoid exces-

sive sensitivity and excessive clockwise

setting.

Maintenance

The H-10G is designed for long life

with very little maintenance. A kit that

contains the necessary expendable

replacement parts is supplied with each

unit. Instructions for replacing these

items are described in the following sec-

tions.

Replacing the Filter

To protect the air pump from dam-

age of foreign particles and moisture,

replace the filter (fig. 3) often. With

moderate use (15–30 minutes per day),

once a month should be sufficient.

To replace the filter, pick out the old

filter with a pin or tweezers. The fine

screen will remain in the tip. Insert the

new filter in the tip and make sure it is

firmly seated against the fine screen.

Figure 4

sensor heat adjustment

indicates sensor

adjustment range

Replacing the Sensor

The sensor is a plug-in unit that can

be discarded when expended. It needs

replacing when the H-10G no longer

responds to the calibrate reference

bottle, even with the sensor heat control

fully clockwise. Make sure that the cali-

brate reference bottle contains fluid.

1. Unplug the AC power cord and open

the sensor cover (fig. 1). The sensor

is now visible.

2. Allow the sensor to cool before touch-

ing it (approximately 15 minutes).

3. Unplug and discard the sensor.

4. Insert a new sensor and close the

cover.

5. Set the sensor heat control (fig. 4) to

its 7 o’clock position.

6. Place the unit in operation and

check its sensitivity by following the

procedure in steps 5, 6, and 7 in

the Operating Instructions section.

Gradually adjust the sensor heat con-

trol more clockwise until the proper

response is obtained. Each time the

sensor heat control is adjusted, make

only small adjustments either up

or down as appropriate. After each

adjustment: wait about 30 seconds

for the sensor temperature to stabi-

lize; adjust balance knob to 1–3 ticks;

and then re-check the sensitivity.

WARNING! Personal Injury Hazard

Sensor surface temperature may reach

390°F (200°C) during operation, and may

cause a burn if not allowed to cool.

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