Bacharach H25-IR User Manual

H25-IR

Infrared Refrigerant Gas Leak Detector

Instruction 3015-4342

Operation & Maintenance

Rev. 8 – June 2010

Product Leadership • Training • Service • Reliability

WARRANTY

Bacharach, Inc. warrants to Buyer that at the time of delivery this Product will be free from defects in material
and manufacture and will conform substantially to Bacharach Inc.'s applicable specifications. Bacharach' s
liability and Buyer's remedy under this warranty are limited to the repair or replacement, at Bacharach's option,
of this Product or parts thereof returned to Seller at the factory of manufacture and shown to Bacharach Inc.'s
reasonable satisfaction to have been defective; provided that written notice of the defect shall have been given
by Buyer to Bacharach Inc. within two (2) years after the date of delivery of this Product by Bacharach, Inc.

Bacharach, Inc. warrants to Buyer that it will convey good title to this Product. Bacharach's liability and Buyer's
remedy under this warranty of title are limited to the removal of any title defects or, at the election of Bacharach,
to the replacement of this Product or parts thereof that are defective in title.

The warranty set forth in paragraph 1 does not apply to parts the Operating Instructions designate as having a
limited shelf-life or as being expended in normal use (e.g., filters).

THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND ACCEPTED IN LIEU OF (I) ANY
AND ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE: AND (II)
ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN CONTRACT OR TORT, WHETHER OR NOT
ARISING FROM BACHARACH'S NEGLIGENCE, ACTUAL OR IMPLIED. The remedies of the Buyer shall be
limited to those provided herein to the exclusion of any and all other remedies including, without limitation
incidental or consequential damages. No agreement varying or extending the foregoing warranties, remedies
or this limitation will be binding upon Bacharach, Inc. unless in writing, signed by a duly authorized officer of
Bacharach.

Register your warranty by visiting

www.mybacharach.com

Notice:

Product improvements and enhancements are continuous; therefore the sp ecifications and information contained in this
document may change without notice.

Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequenti al d amages in connection with
the furnishing, performance, or use of this material.

No part of this document may be photocopied, reproduced, or translated to another language without the prior written
consent of Bacharach, Inc.

Copyright © 2005–2009, Bacharach, Inc., all rights reserved.
BACHARACH

referenced herein belong to their respective owners.

®

is a registered trademark of Bacharach, Inc. All other trademarks, trade names, service marks and logos

A Instruction 3015-4342

H25-IR Contents

Table of Contents

1 Introduction ................................................................................................................................ 1

1.1 Purpose of Instruction Manual ...........................................................................................................1

1.2 Safety Precautions...............................................................................................................................1

1.2.1 Warning Statements.............................................................................................................1

1.2.2 Caution Statements ..............................................................................................................1

1.2.3 Hazard Symbols ....................................................................................................................1

1.2.4 AC Power and Grounding.....................................................................................................1

1.2.5 Explosive Atmosphere ..........................................................................................................2

1.2.6 Accessing the Interior of the Instrument ............................................................................2

1.2.7 Misuse and Modifications to Instrument ............................................................................2

1.2.8 In Case of Malfunction..........................................................................................................2

1.2.9 Cleaning.................................................................................................................................2

1.3 Ordering Information ..........................................................................................................................3

1.4 Unpacking and Initial Checks ............................................................................................................3

1.5 Features and Capabilities ...................................................................................................................4

1.6 Functional Overview ...........................................................................................................................5

1.7 Names and Functions of Components................................................................................................6

1.7.1 Front View .............................................................................................................................6

1.7.2 Rear View ..............................................................................................................................7

1.7.3 Interior...................................................................................................................................7

1.7.4 Standard Probe .....................................................................................................................8

1.7.5 Standard Probe with LED and Programmable Pushbutton ..............................................8

1.7.6 Smart Probe...........................................................................................................................9

1.7.7 Smart Probe Keylock Function ............................................................................................9

1.8 Menu System .....................................................................................................................................10

2 Preparing for Operation ........................................................................................................ 11

2.1 Connecting the Probe ........................................................................................................................11

2.2 Connecting the AC Power Cord ........................................................................................................11

2.3 Battery Pack ......................................................................................................................................11

2.4 Turning ON the Instrument .............................................................................................................11

2.5 System Setup .....................................................................................................................................12

2.5.1 Gas Type ..............................................................................................................................12

2.5.2 Leak Units ...........................................................................................................................12

2.5.3 Relays...................................................................................................................................13

2.5.4 4–20 mA Loop ......................................................................................................................13

2.5.5 Brightness............................................................................................................................14

2.5.6 Clock ....................................................................................................................................14

2.5.7 PCHK Mode.........................................................................................................................14

2.5.8 Probe Button .......................................................................................................................14

2.5.9 Reset Defaults .....................................................................................................................14

2.6 Configuring the SETUPS Function ..................................................................................................15

2.6.1 Setup Name .........................................................................................................................15

2.6.2 Range ...................................................................................................................................15

2.6.3 Gas Type ..............................................................................................................................16

2.6.4 Feedback Mode....................................................................................................................16

2.6.5 Setpoint................................................................................................................................16

2.6.6 Search Auto Zero.................................................................................................................17

2.7 External Relay Connections..............................................................................................................18

2.8 4–20 mA Current Loop Connection ..................................................................................................19

3 Calibration................................................................................................................................. 21

3.1 Selecting Internal or External Calibration ......................................................................................21

3.1.1 Internal Calibration Selection............................................................................................21

3.1.2 External Calibration Selection and Setup.........................................................................22

3.2 Internal Calibration ..........................................................................................................................22

3.3 External Calibration..........................................................................................................................23

3.4 CAL Factor .........................................................................................................................................24

Instruction 3015-4342 i

Contents H25-IR

3.4.1 Simulating Other Internal Leak Source Gas Types Using the CAL Factor.................. 25

3.4.2 Improving PPM Measurement Accuracy using the CAL Factor ..................................... 25

3.4.3 Adjusting the CAL Factor ..................................................................................................26

3.5 Restoring Factory Calibration .......................................................................................................... 27

3.6 Storing a New Factory Calibration ..................................................................................................27

4 Operation....................................................................................................................................29

4.1 Instrument Location .........................................................................................................................29

4.2 Using the H25-IR ..............................................................................................................................29

4.2.1 Power ...................................................................................................................................29

4.2.2 Initial Setup ........................................................................................................................29

4.2.3 Range Selection................................................................................................................... 30

4.2.4 Setup Selection ...................................................................................................................30

4.2.5 Volume Adjustment ............................................................................................................ 30

4.2.6 Searching for a Leak...........................................................................................................31

4.2.7 Measuring the Leak Rate................................................................................................... 31

4.2.8 Measuring the PPM Level.................................................................................................. 32

4.2.9 Logging Measured Readings .............................................................................................. 32

4.2.10 Logged Measurements........................................................................................................ 33

4.2.10.1 Viewing Logged Measurements ..................................................................... 33

4.2.10.2 Clearing the Log.............................................................................................. 33

4.2.10.3 Viewing the Total of All Logged Measurements ........................................... 33

4.2.10.4 Setting the Log Limit...................................................................................... 34

4.3 Fault Conditions................................................................................................................................ 34

4.4 PCHK (Atmospheric Pressure CHecK) ............................................................................................ 35

4.5 RS-232 Communication ....................................................................................................................35

4.6 Serial Output Types ..........................................................................................................................35

5 Maintenance...............................................................................................................................37

5.1 Diagnostics Menu ..............................................................................................................................37

5.1.1 Sensor Data.........................................................................................................................37

5.1.2 Last Fault ............................................................................................................................ 38

5.1.3 IR Emitter ...........................................................................................................................39

5.1.4 Pressure............................................................................................................................... 39

5.1.5 Loop Test .............................................................................................................................39

5.1.6 Clear Last Fault..................................................................................................................39

5.1.7 Auto Gain ............................................................................................................................40

5.2 Factory Menu..................................................................................................................................... 40

5.2.1 DIGIPOT .............................................................................................................................40

5.2.2 Leak Rate ............................................................................................................................40

5.2.3 Leak Gas..............................................................................................................................41

5.2.4 Leak Temp...........................................................................................................................41

5.2.5 Leak TEMPCO.................................................................................................................... 41

5.2.6 Sensor Cal ...........................................................................................................................41

5.2.6.1 Pressure Sensor Calibration Screen ..............................................................41

5.2.6.2 Flow Rate Sensor Calibration Screen (Factory Calibration)........................ 42

5.2.6.3 Box Temperature Calibration Screen ............................................................42

5.2.7 Model Select ........................................................................................................................42

5.2.8 Probe Type........................................................................................................................... 43

5.2.9 Firmware .............................................................................................................................43

5.3 Flashing Memory............................................................................................................................... 43

5.4 Part Replacement .............................................................................................................................. 46

5.4.1 Removing the Top Cover .................................................................................................... 46

5.4.2 Fuse Replacement............................................................................................................... 47

5.4.3 Probe Tip Filter & O-Ring Replacement ........................................................................... 47

5.4.4 Internal Filter Replacement ..............................................................................................48

5.4.5 Optical Bench Replacement ...............................................................................................48

5.4.5.1 Top Cover Removal .........................................................................................49

5.4.5.2 Installing the New IR Optical Bench............................................................. 49

5.4.5.3 IR Emitter Adjustment................................................................................... 49

ii Instruction 3015-4342

H25-IR Contents

5.4.5.4 DIGIPOT Adjustment .....................................................................................50

5.4.5.5 Factory Calibration .........................................................................................50

5.5 Replacement Parts...............................................................................................................................52

5.6 Service Centers ..................................................................................................................................53

6 Troubleshooting ....................................................................................................................... 54

7 Specifications............................................................................................................................ 60

APPENDIX A – Factory Defaults ................................................................................................ 62

Instruction 3015-4342 iii

Contents H25-IR

Notes:

iv Instruction 3015-4342

H25-IR Introduction

1 Introduction

1.1 Purpose of Instruction Manual

This instruction manual provides important information on how to install, operate, and service the Bachar ach
H25-IR Refrigerant Gas Leak Detector.

To assure operator safety and the proper use of this instrument, please read, understand, and follow the
contents of this manual.

Please retain these instructions for future reference.

1.2 Safety Precautions

Safety is essential in the use and maintenance of Bacharach equipment. Therefore this instruction manual and
any markings on the exterior of H25-IR case provide important safety information concerning the operation and
maintenance of this instrument.

1.2.1 Warning Statements

The use of the word WARNING in this manual denotes a potential hazard associated with the use of this
equipment. It calls attention to a procedure, practice, condition, or the like, which if not correctly performed or
adhered to, could result in injury or death of personnel using this instrument.

1.2.2 Caution Statements

The use of the word CAUTION in this manual denotes a potential hazard associated with the use of this
equipment. It calls attention to a procedure, practice, condition, or the like, which if not correctly performed or
adhered to, could result in damage to the instrument.

1.2.3 Hazard Symbols

This symbol indicates the need to consult this instruction manual when opening the enclosure.
WARNING: A potential risk exists if the operating instructions are not followed.

This symbol indicates the presence of electric shock hazards when the enclosure is opened.
WARNING: To avoid risk of injury from electric shock, do not open the enclosure when AC power is
applied to the instrument.

1.2.4 AC Power and Grounding

The H25-IR uses a universal power supply that is capable of accepting inputs of 100 to 240 VAC, 50/60 Hz.
Under no circumstances should this instrument be operated without connection to a protective ground. Doing so

creates a potential shock hazard and is also a violation of electrical safety standards appli ca ble to this type of
equipment.

Instruction 3015-4342 1

Introduction H25-IR

1.2.5 Explosive Atmosphere

Do not operate this instrument in the presence of flammable liquids, vapors or aerosols. Operat ion of any
electrical instrument in such an environment constitutes a safety hazard.

1.2.6 Accessing the Interior of the Instrument

Only qualified maintenance personnel should access the interior of this instrument. Always unplug the AC
power cord before performing any wiring or maintenance work.

1.2.7 Misuse and Modifications to Instrument

The operation of the H25-IR may be impaired if the instrument is used in a manner not specified in this
instruction manual. Changes or modifications to the instrument, not expressly approved by Bacharach, will void
the warranty.

1.2.8 In Case of Malfunction

Do not continue to use this equipment if there are any symptoms of malfunction or failure. In the case of such
occurrence, unplug the AC power cord and contact a qualified repair technician or the nearest Bacharach
Service Center.

1.2.9 Cleaning

USE a dry cloth to clean the outside of the case. DO NOT use soap and water.

2 Instruction 3015-4342

H25-IR Introduction

1.3 Ordering Information

The H25-IR instrument along with its Probe type and Hose length are ordered by specifying 3 codes. The codes
must be listed in the following sequence:

Code A – Model Name
Code B – Gas Type
Code C – Probe Type and Hose Length

Table 1-1. H25-IR Instrument, Probe Type & Hose Length Ordering Information

Code A
Code B

Code C

For example: To order an H25-IR that detects CFC type refrigerants; a Standard Probe with LED & Button; and
a 6 foot hose, you would order an H25IR-1-3

Code Description

H25IR Infrared Gas Leak Detector

-1

-2

-3

-4

-5

-1

-2

-3

-4

-5

-6

CFC, HFC, HCFC & Halogen Gases
R600a
SF

6

2

CO
R227
Standard Probe, 6 foot Hose
Standard Probe, 12 foot Hose
Standard Probe, LED & Button, 6 foot Hose
Standard Probe, LED & Button, 12 foot Hose
Smart Probe, 6 foot Hose
Smart Probe, 12 foot Hose

1.4 Unpacking and Initial Checks

Your H25-IR Refrigerant Gas Leak Detector and all accessories were carefully inspected at the factory before
shipment, and packed so as to be highly resistant to damage while in transport.

When you receive the instrument, please unpack it promptly and make a visual inspection to make sure that no
damage has occurred during shipment and that all ordered items have been received. Your order should
consists of:

 H25-IR instrument
 Probe and Hose Assembly
 Both an 8 and 15 inch Flexible Probe Tube
 AC Power Cord or Battery (dependent on model type)
 Instruction Manual.
 Carrying case (with battery powered units)

If damage was found, immediately file a claim with the carrier. If an item is missing, please contact Bacharach’s
Service Department for assistance (refer to Section 5.6 Service Centers).

Instruction 3015-4342 3

Introduction H25-IR

1.5 Features and Capabilities

 Detects and measures (depending on instrument’s part number):

o CFCs, HCFCs, HFCs and halogens
o R600a
o SF
o CO

 Infrared detector
 Internal calibration leak standard
 Provision for external calibration on other types of gases
 User selectable leak rate measurement in either Oz/yr, g/yr, mL/s, PaM
 Easy to read Vacuum Fluorescent Display (VFD)
 Excellent background gas rejection
 420 mA current loop output
 Relay outputs for external equipment control
 On screen menu system for system setup, diagnostics, calibration, and data logging
 Assortment of probe and hose assemblies, available in either 6 or 12 foot

(1.8 or 3.7 m) hose lengths

 Assortment of flexible probe tubes, available in either 8 or 15 inch

(200 or 381 mm) lengths

6

2

3

/s, or ppm

4 Instruction 3015-4342

H25-IR Introduction

1.6 Functional Overview

The H25-IR is an industrial gas leak analyzer for the detection of CFCs, HCFCs, HFCs and halog en gas
compounds, R600a, SF
log and totalize a group of leaks in a system.

The H25-IR’s front panel contains 7 membrane pushbuttons, probe connector, calibration ga s port, an d a 3­¼ x ¾ inch VFD (Vacuum Fluorescent Display) that provides a bright, high-contrast display for easy viewing.
The plug-in instrument is housed in an all-metal case with adjustable handle. The battery operated instrument
version includes a padded carrying case.

The instrument has two modes of operation: Search and Measure. The Search mode is used to locate the
source of a leak. While the Measure mode is used to quantify the size of the leak. A hand-held probe is used to
draw in a gas sample from the area under inspection.

With the instrument in its Search mode, the location of a leak is pinpointed by means of visual and audio
indicators positioned on both the instrument and probe*. As the probe tip approaches the leak source the length
of a bar graph at the bottom of the instrument’s front panel display, the blink rate of an LED on the probe, and
the frequency of an audible tone are all affected in a positive manner (bar graph becomes longer, LED flashes
faster, and the audio tone increases in frequency). There are three search sensitivities available: SM, MED and
LG, indicating the size of the leak being searched for. This feature is useful in avoiding being bothered with
small leaks when searching for larger ones.

In the Measure mode, the probe tip is held over the leak source until the displayed value of the leak rate
stabilizes. Leak rates can be displayed in units of Oz/yr, g/yr, mL/s, PaM
be used to display the quantity of gas contained in a confined space with the instrument set up in its ppm mode.

The leak rate is measured by first capturing all the gas leaking from the component under test. Then by
accurately measuring the flow rate of the sampling stream and the gas concentration within that stream, the
leak rate can be calculated using Equation 1-1. The instrument then converts this data into the desired leak rate
units of measure and displays the leak rate on the instrument’s front panel.

Eq. 1-1
Leak Rate = Flow Rate x Gas Concentration
where:
Leak Rate = rate of gas leak from component under test
Flow Rate = sample flow rate
Gas Concentration = concentration of gas in the sample (ppm)

A leak measurement can be logged in memory with a time/date stamp. Up to 50 leaks can be logged and
totalized. This feature is useful in testing an installation that has a maximum permissible leak rate. Logged data
can be recalled for viewing on the display.

There are four user-defined setups that allow the operator to quickly switch between frequently used
combinations of Gas Type, Range, Feedback Mode, Setpoint, and the Auto Zero Off condition.

Extensive diagnostics keep track of several system parameters. When a fault is detected, the word “FAULT”
blinks on the display and an audible beep is heard every 2 seconds. Text descriptions of all current fault
conditions can be displayed from the instrument’s Diagnostics menu.

Four SPDT relays provide control over a variety of external equipment (e.g., horns, bells, strobe lights) that can
be automatically triggered when their associated relays are energized by any one of 11 different operating
conditions.

A 420 mA current loop output can be used for the connection of external monitoring equipment (e.g., chart
recorder). An RS232 serial port can output leak rate data as ASCII text at 10 times per second.

,, or CO2. This instrument can be used to locate and then quantify gas leaks, as well as

6

3

/s. The Measure mode can also

* The Standard Probe does not contain an LED.

Instruction 3015-4342 5

Introduction H25-IR

1.7 Names and Functions of Components

1.7.1 Front View

Front Panel Buttons

ENT

(Enter)
ESC

(Escape)
VOL

(Volume)

SETUP

MODE
RANGE
ZERO
LOG

MENU
CAL

(Calibration)

• Selects a highlighted menu item.

• Saves a selection or manually entered data (e.g. date and time).

• Displays a previously viewed menu or data screen.

• Cancels a data entry function; retains old data; and displays previous screen.
Volume adjustment. The Up and Down buttons slowly raise and lower the volume; the Left

button sets volume to minimum; and the Right button set volume to maximum.
Selects one of four user-defined setups consisting of: Range, Gas Type, Feedback Mode,

and the Auto Zero OFF condition.
Toggles the operating mode between Search and Measure.
Selects one of three sensitivity ranges (small, medium, or large leak).
Zeros the gas reading.
Logs the currently displayed gas measurement in memory when in the Measure mode,

where it can later be reviewed using the Main menu’s LOG function.
Press both the ENT and ESC buttons at the same time to display the Main menu.
Starts the calibration process where the instrument is calibrated to a known le ak source

using either the instrument’s front panel Calibration Port, or a customer supplied external
leak source.

Menu selection and data entry buttons:
Up  Moves selected (highlighted) menu item up through screen, or increments an

alphanumerical value when entering data.
Down  Moves selected (highlighted) menu item down through screen, or decrements an
alphanumerical value when entering data.

Left  Moves cursor left across screen.
Right  Moves cursor right across screen.

6 Instruction 3015-4342

H25-IR Introduction

1.7.2 Rear View

O

BATTERY POWER
SWITCH (on dual

only)

power

CONNECTOR for
battery cable (on
dual power only)

1.7.3 Interior

Instruction 3015-4342 7

Introduction H25-IR

1.7.4 Standard Probe

HOSE
6 or 12 foot
(1.8 or 3.7 m)

PROBE CONNECTOR
(Align with red dot on
instrument’s front panel
PROBE receptacle)

FLEXIBLE PROBE TUBE
8 inches
(203 mm)

PROBE TIP with FILTER

1.7.5 Standard Probe with LED and Programmable Pushbutton

HOSE
6 or 12 foot
(1.8 or 3.7 m)

PROGRAMMABLE PUSHBUTTON
(Can be programmed to either zero
the instrument, or switch between
the Search and Measure mode of
operation)

PROBE CONNECTOR
(Align with red dot on
instrument’s front panel
PROBE receptacle)

FLEXIBLE PROBE TUBE
8 inches
(203 mm)

PROBE TIP with FILTER

LED
(Flash rate increases as
the detected gas level
increases, or lights
steady when a user
selected leak rate is
detected.)

8 Instruction 3015-4342

H25-IR Introduction

1.7.6 Smart Probe

1.7.7 Smart Probe Keylock Function

The Smart Probe’s keypad can be locked to
prevent accidental key presses when working in
tight spaces.

Instruction 3015-4342 9

Introduction H25-IR

1.8 Menu System

Press the ENT and ESC keys at the same time to access the Main menu. The menu system enables the
operator to perform such functions as setting up the instrument, viewing logged readings, configurin g the four
user-defined setups, entering calibration data, and viewing the instrument’s diagnostic readings. The buttons
on the instrument’s front panel and probe are mapped the same and can be used inter-changeably, with
exception of the CAL button.

Select a menu item by first using the Up and Down buttons to highlight the desired item, and then pressing
ENT to select that item and display its data screen. After an item has been selected, use the Left, Right, Up,
and Down buttons to highlight or change data within a screen. Pressing the ENT button saves the new data,
while pressing the ESC button aborts the operation and displays the previous screen.

Main Menu:

SYSTEM System Menu:

LOG GAS TYPE ........................Gas being monitored

SETUPS LEAK UNITS ..................... Leak rate units of measure

CAL DATA RELAYS ............................Relay set up for activating external equipment

DIAGNOSTICS LOOP ................................420 mA signal’s mA per ppm loop factor

FACTORY* BRIGHTNESS ...................Brightness level of display

CLOCK ..............................Date and time

PCHK MODE .....................Determines when a pressure check is performed

PROBE BUTTON ..............Selects function of button on the Standard Probe

RESET DEFAULTS...........Resets user programmable parameters to factory defaults

(Calibration data is not changed)
Log Menu:

VIEW LOG.........................View individual logged measurements

CLEAR LOG ......................Clear total contents of log

LOG TOTAL.......................View a numerical total of all measurements stored in log (up to 50)

LOG LIMIT .........................Total accumulated leak setpoint

Setup Menu: SETUP NAME..................Text name given to the SETUP selection

SETUP NO.1 RANGE.............................Sensitivity of instrument (small, medium, large)

SETUP NO.2 GAS TYPE .......................Gas being monitored

SETUP NO.3 FEEDBACK MODE ..........Gas-level feedback (continuous, setpoint, H25C)

SETUP NO.4 SETPOINT........................Gas value for the Feedback Mode & Search Auto

SEARCH AUTO ZERO....Sets condition when auto zero is turned OFF

Calibration Data Menu:

CAL TYPE............................Internal or external leak source

EXT RATE............................Leak rate of external leak source

EXT GAS TYPE...................Type of gas in external leak source

CAL FACTOR ......................Calibration factor

RESTORE FACTORY CAL.....Restores factory leak rate calibration (internal leak source only)

CAL INTERVAL ...................Allows user to select amount of time between required calibrations

ENFORCE CAL INTERVAL.Allows user to call for calibration at programmed interval

LAST CAL DATE .................Displays date and time of last calibration cycle performed

Diagnostic Menu:

SENSOR DATA.................Raw data from all sensors

LAST FAULT......................List of all current faults, or last fault

IR EMITTER.......................Infrared emitter’s voltage, amperage, wattage, & resistance

PRESSURE .......................All measured pressures

LOOP TEST.......................Set the 4–20 mA loop output to 0, 4, 10, or 20 mA

CLR LAST FAULT .............Clear fault list of all faults

Factory Menu:

AUTO GAIN .......................Automatically set digital potentiometer (zero gas applied)

DIGIPOT ............................Manually set digital potentiometer (zero gas applied)

LEAK RATE .......................Leak rate of internal leak source

LEAK GAS .........................Gas type used in internal leak source

LEAK TEMP.......................Specified temperature for internal leak source in °C

LEAK TEMPCO .................Temperature coefficient for internal leak source in % per °C

SENSOR CAL....................Pressure, temperature, and flow calibration settings

MODEL SELECT ...............Selects model of unit according to part number

PROBE TYPE....................Selects type of probe connected to instrument

FIRMWARE........................Date firmware was compiled

* The Factory Menu appears only when activated by service technicians who know the correct activation procedure.

SERIAL OUTPUT.............Configures serial data format for RS232 output

AUTO GAIN........ ........Automatically set digital potentiometer (zero gas applied)

10 Instruction 3015-4342

H25-IR Preparing for Operation

2 Preparing for Operation

2.1 Connecting the Probe

Plug the probe connector into the front panel PROBE receptacle
by aligning the red dots on both the connector and receptacle. Screw the
desired flexible probe tube (8 or 15 inches) onto the probe assembly.

2.2 Connecting the AC Power Cord

Dependent on the instrument model the H25-IR may use an AC power cord or a
battery pack. Reference your model number to obtain this information.
Disregard any information that does not apply to your model.

The H25-IR is supplied with a 6 foot grounded AC power cord. Make sure that
an AC power receptacle (socket) compatible with this plug is available nearby.

The instrument uses a universal AC power supply that accepts inputs of 100 to
240 VAC, 50/60 Hz. Power consumption is approximately 15 Watts.

Before connecting the AC power cord, first make sure the instrument’s power switch is OFF. Next, connect the
power cord to the instrument’s rear panel AC power receptacle, and then plug the power cord into a nearby AC
power receptacle.

2.3 Battery Pack

The H25-IR can be ordered as a battery powered instrument. This will allow the user to work in areas where a
receptacle is not easily accessible. This battery powered instrument can also operate on AC power when
battery operation is not needed. The battery powered H25-IR comes with a padded carrying case with th e
following features:

 Inside pocket to hold the battery pack (included with battery pack kit)
 Side pocket to hold the charger (included with battery pack kit)
 Front outside pocket to hold the probe and power cord

2.4 Turning ON the Instrument

WARNING! Explosion Hazard. Do not operate this instrument in the presence of flammable liquids,

vapors or aerosols. Operation of this instrument in such an environment constitutes a safety hazard.
Turn ON the instrument by setting its power switch, located on the rear panel, to ON.

BACHARACH

VERSION x.xx

Immediately afterwards, the instrument enters its warm-up mode and a countdown from 120 seconds is started.
In addition, a graphical display of the countdown period is provided by a bar graph that moves down the screen
during warm-up.

Instruction 3015-4342 11

WARM UP

120

When power is first applied, the instrument produces one short beep and
then performs a self-diagnostic check while displaying the instrument’s
firmware version number (approx. 15 seconds).

Remaining Warm Up Time in Seconds
Graphical Display of Warm Up Time

Preparing for Operation H25-IR

At the end of warm-up the Data Display screen appears. This screen shows the current gas measurement, leak
units, gas type, setup name, range, and mode of operation. In addition, a graphical display of the relative gas
level is provided by a bar graph that moves up the screen with increasing gas levels. Note that the sensitivity of
the bar graph is dependent on the Range setting.

Oz/yr

R134A

SETUP
SM SRCH

Gas Measurement
Leak Units
Gas Type
Setup Name (first 8 characters)
Range and Mode
Graphical Display of Relative Gas Level

2.5 System Setup

When shipped from the factory, the H25-IR has been configured according to its part number as described in
Appendix “A”. To change any of the instrument’s system parameters, first enter System Setup by pressing both
the ENT and ESC buttons on either the instrument’s front panel or Smart probe at the same time to display the
Main menu. Next, use the Up and Down buttons to highlight “SYSTEM”, and then press ENT to display the
System Setup menu.

Main Menu:

SYSTEM

LOG
SETUPS
CAL DATA
DIAGNOSTICS

From the System Setup menu, use the Up and Down buttons to highlight the desired function. Press ENT to
select that function and display its setup screen. Then perform the appropriate system setup procedure as
described in Sections 2.5.1 thru 2.5.9.

System Setup Menu:

GAS TYPE

LEAK UNITS
RELAYS
LOOP
BRIGHTNESS
CLOCK
PCHK MODE
PROBE BUTTON
RESET DEFAULTS

2.5.1 Gas Type

GAS TYPE < R134A
R401A
R402A
< R402B

The GAS TYPE function displays a list of gases that the instrument is programmed to monitor. Refer to Section
6 for a complete list of these gases.

Use the Up and Down buttons to highlight the desired gas. Press ENT to save the selection.

2.5.2 Leak Units

LEAK UNITS Oz/yr

g/yr

mL/s
PaM/s
ppm

The LEAK UNITS function displays a list of leak rate units of measure that the instrument is capable of
displaying. Leak rates can be displayed in units of ounces/year (Oz/yr), grams/year (g/yr), milliliters/second
(mL/s), Pascal Meters

Use the Up and Down buttons to highlight the desired leak units. Press ENT to save the selection.

12 Instruction 3015-4342

3

/second (PaM/s), or parts per million (ppm).

H25-IR Preparing for Operation

2.5.3 Relays

1 = NOT USED

2 = NOT USED
3 = NOT USED
4 = NOT USED

Four SPDT relays (rated 2 A, 250 VAC – inductive / 5 A, 250 VAC - resistive) can be individually programmed
to energize under any one of 11 different operating conditions. The contacts of these relays can be connected
to an external device that will activate when the designated operating condition is met. Refer to Section 2.7
External Relay Connections.

Use the Up and Down buttons to highlight the relay to be programmed. Press ENT to make the selection and
display that relay’s assignment screen.

Use the Up and Down buttons to highlight the desired operating condition for the selected relay. Press ENT to
save the selection.

RELAY 1 ASSIGNED TO
NOT USED
CLOSE >= SETPOINT
CLOSE < SETPOINT
CLOSE ON FAULT
CLOSE DURING CAL
CLOSE IN MEASURE
CLOSE AT LOG LIMIT
CLOSE IN SETUP 1
CLOSE IN SETUP 2
CLOSE IN SETUP 3
CLOSE IN SETUP 4
CLOSE WHEN TESTING

NOTE: SETPOINT is the gas value as entered per Section “2.6.5 Setpoint.”
LOG LIMIT is the total accumulated leak value as entered p er Section “4. 2.10.4 Settin g the Log Limit.”

For example: If Relay 1 is programmed to “CLOSE AT LOG LIMIT,” its N.O. contacts can be connected to an
external alarm device (e.g. strobe light or buzzer) that will activate when the total accumulated leak value in the
data log has reached its programmed limit.

TIP: When measuring the total leak-rate of a system, it’s important to clear the log per Section “4.2.10.2
Clearing the Log” before starting a new series of leak-rate measurements.

2.5.4 4–20 mA Loop

EDIT LOOP FACTOR

0.016ppm

Selecting the 4–20 mA LOOP function allows the current loop factor to be changed from its factory default of

0.016 ppm (corresponds to 0.016 mA per ppm), which provides an output range of 0 ppm (4 mA) to 1,000 ppm
(20 mA). Refer to Equation 3.1.

Use the Left and Right buttons to move the bl inking cursor ac ross the screen to high light the digit to be modif ied,
and then use the Up and Down buttons to modify that digit. P ress ENT to save the new loop factor.

Loop Output in mA = (Loop Factor x ppm) + 4 mA Eq. 3.1
TIP: The loop output can be checked per Section “5.1.5 Loop Test”.

Instruction 3015-4342 13

Preparing for Operation H25-IR

A

2.5.5 Brightness

BRIGHTNESS

PRESS ARROW KEYS TO
ADJUST

The BRIGHTNESS function changes the brightness level of the instrument’s front panel display.
Use the Up, Down, Left, or Right button to change the brightness to any one of four levels. Press ENT to save

the selected brightness level.

2.5.6 Clock

The CLOCK function sets the instrument’s date (MM/DD/YY) and time (24 hour format, where 1:00 PM is
displayed as 13:00). The clock allows measured values to be logged with a date/time stamp (refer to Section

4.2.9 Logging Measured Readings).
Use the Left and Right buttons to move the blinking cursor across the screen to highlight the digits to be

modified, and then use the Up and Down buttons to modify those digits. Press ENT to save the new date and
time values.

SET DATE & TIME

07/16/04 13:13

2.5.7 PCHK Mode

PCHK MODE
AT CAL

The PCHK Mode setting determines when the instrument performs an ambient pressure check a s follo ws:

AUTO – A pressure check is performed once every 60 minutes.
AT CAL – A pressure check is performed at the end of every calibration.

Note that a pressure check is always performed when the instrument is first turned ON just before the warm-up
period begins, regardless of the PCHK Mode setting.

Use the Up and Down buttons to highlight the desired setting. Press ENT to save the selection.

UTO

2.5.8 Probe Button

PROBE BUTTON
DISABLED
MODE KEY
ENTER KEY

The PROBE BUTTON function selects what action is performed by the pushbutton on the Standard Probe with
LED and Pushbutton.

DISABLED – No action performed.
MODE KEY – Toggles the instrument between its Search and Measure mode.
ENTER KEY – Performs the same function as the ENT / ZERO key on the instrument’s front panel.

Use the Up and Down buttons to highlight the desired setting. Press ENT to save the selection.

2.5.9 Reset Defaults

CONFIRM RESET TO
DEFAULTS BY PRESSING
THE UP ARROW

The RESET DEFAULTS function returns the instrument to its factory default settings per Appendix “A”.
This operation requires a three key press. Simultaneously press the ENTER+ESCAPE+VOL buttons to reset

defaults.

14 Instruction 3015-4342

H25-IR Preparing for Operation

2.6 Configuring the SETUPS Function

There are four user-defined Setups that allow the operator to quickly switch between frequently used
combinations of Gas Type, Range, Feedback Mode, Setpoint, and the Auto Zero Off condition. Program the
four Setup configurations as follows:

First enter the Setups menu by pressing both the ENT and ESC buttons on either the instrument’s front panel or
Smart probe at the same time to display the Main menu. Next, use the Up and Down buttons to highlight
“SETUPS”, and then press ENT to display the Setups menu.

Main Menu:

SYSTEM

LOG
SETUPS
CAL DATA
DIAGNOSTICS

NOTE: The names listed in the Setups menu are user defined, and may vary from what is shown above.

From the Setups menu, use the Up and Down buttons to highlight the desired Setup. Press ENT to select that
Setup and display its Configuration menu.

From the Configuration menu, use the Up and Down buttons to highlight the desired function. Press ENT to
select that function and display its setup screen. Perform the appropriate setup procedure as described in
Sections 2.6.1 thru 2.6.6.

Setups Menu:

SETUP NO.1

SETUP NO.2
SETUP NO.3
SETUP NO.4

Configuration Menu:

SETUP NAME
RANGE
GAS TYPE
FEEDBACK MODE
SETPOINT
SEARCH AUTO ZERO

2.6.1 Setup Name

SETUP NAME #1
SETUP NO. 1

The SETUP NAME function allows the operator to give each Setup a unique name that will appear on the Data
Display screen. Use the Left and Right buttons to move the blinking cursor across the screen to highlight the
character to be modified, and then use the Up and Down buttons to modify that character. When finished
entering the desired characters, press ENT to save the new name.

2.6.2 Range

RANGE LG
SETUP NO. 1 MED
SM

The RANGE function sets the sensitivity of the gas-level graphical display (bar graph located at the bottom of
the display), audible tone frequency, and the hand-held probe’s LED blink rate in relation to the detected gas
level. Use the Up and Down buttons to highlight the desired sensitivity. Press ENT to save the selection.

NOTE: The range setting has no affect on the accuracy of the gas reading as displayed on the instrument when
making a leak-rate measurement.

Instruction 3015-4342 15