Ametek BROOKFIELD JEROME 631-X User manual

700-0037 Revision 1.0
JEROME®631-X
HYDROGEN SULFIDE ANALYZER
USER MANUAL
September 2022
AMETEK BROOKFIELD
3375 N Delaware Street | Chandler, AZ 85225 USA
800.528.7411 | 602.470.1414 | f 602.281.1745
www.brookfieldengineering.com
Email:
Sales –sales.j[email protected]
International –[e-mail]
Customer Service –[e-mail]

Customer Service 800-528-7411 or 602-470-1414 Page 2 of 52
700-0037 Rev 1.0
JEROME®631-X
Hydrogen Sulfide Analyzer
User Manual
PROPRIETARY RIGHTS NOTICE
This manual contains valuable information developed by AMETEK Brookfield for use with
the Jerome®631-X Hydrogen Sulfide Analyzer. No part of this manual can be reproduced
or transmitted in any form or by any means, electronic, mechanical, or otherwise. This
includes photocopying and recording or in connection with any information storage or
retrieval system without the express written permission of
AMETEK Brookfield.
ALL RIGHTS RESERVED
©Copyright 2008-2021 AMETEK Brookfield
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AddSorb®is a registered trademark of Jacobi Carbons.
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Windows®is a registered trademark of Microsoft Corporation in the United
States and other countries.

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700-0037 Rev 1.0
Table of Contents
1. FOR THOSE WHO CAN'T READ THE WHOLE MANUAL NOW..................................................................4
2. INTRODUCTION......................................................................................................................................................6
3. PRINCIPLE OF OPERATION ................................................................................................................................7
Zero Air Filter................................................................................................................................................................8
Gas Flow Schematics ....................................................................................................................................................8
4. INSTRUMENT OPERATION..................................................................................................................................10
LCD Codes....................................................................................................................................................................10
Daily Operations............................................................................................................................................................11
Sensor Regeneration......................................................................................................................................................12
Zero Adjust....................................................................................................................................................................13
Sample Mode.................................................................................................................................................................14
Survey Mode .................................................................................................................................................................15
Operating on AC Power or Generator...........................................................................................................................16
Operating on Internal Battery Power.............................................................................................................................16
External battery power ..................................................................................................................................................16
Charging Batteries.........................................................................................................................................................17
Obtaining Maximum Battery Life.................................................................................................................................17
5. MAINTENANCE........................................................................................................................................................18
Preventive Maintenance Calendar.................................................................................................................................18
Flow System..................................................................................................................................................................19
0.25 inch Fritware Filter........................................................................................................................................19
Internal Filters .......................................................................................................................................................20
Replacing the Battery Pack ...........................................................................................................................................21
Setting the Input Voltage...............................................................................................................................................21
Changing the Fuse.........................................................................................................................................................22
6. CALIBRATION..........................................................................................................................................................23
Verification of Functionality and Quality Control........................................................................................................23
7. 631-X TROUBLESHOOTING..................................................................................................................................24
8. JEROME®631-X TECHNICAL SPECIFICATIONS............................................................................................27
Optional Communications Capability...........................................................................................................................28
Instrument I/O Interface................................................................................................................................................28
Potential Interferences...................................................................................................................................................29
9. ACCESSORIES & MAINTENANCE PARTS........................................................................................................30
Spare Parts.....................................................................................................................................................................32
10. Factory Calibration Service.......................................................................................................................................35
11. APPENDIX A - 631-X FUNCTIONAL TEST MODULE......................................................................................36
Simple Operation...........................................................................................................................................................36
12. APPENDIX B - JEROME®COMMUNICATIONS SOFTWARE .......................................................................37
JCS Kit Contents ...........................................................................................................................................................38
System Requirements....................................................................................................................................................38
Data Logger Option.......................................................................................................................................................38
13. APPENDIX C - INTERNAL DIP SWITCH SETTINGS.......................................................................................39
DIP Switch Settings:......................................................................................................................................................39
14. APPENDIX D - JEROME®631-X OPTION FUNCTIONALITY........................................................................40
Auto-Zero......................................................................................................................................................................40
Instrument Zeroing........................................................................................................................................................41
Timed Regeneration ......................................................................................................................................................42
Auto-Sample..................................................................................................................................................................42
4-20 mA Analog Output................................................................................................................................................43
Connection and Setup:...........................................................................................................................................44
Fresh Air Solenoid.........................................................................................................................................................46
DC Power Operation .....................................................................................................................................................47
DC Power Adaptor Kit, AMETEK BROOKFIELD P/N Y031 0902...................................................................47
15. BROCHURE...............................................................................................................................................................Error!
Bookmark not defined.........................................................................................................................................................
16. WARRANTY………………………..…………………………………………………………………………………52
An up-to-date electronic copy of this manual can be found at:
https://www.brookfieldengineering.com/

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700-0037 Rev 1.0
1. FOR THOSE WHO CAN'T READ THE WHOLE MANUAL NOW
This manual contains details that will optimize the results and the life of your instrument. Read
and refer to the manual for complete details on operation, maintenance and troubleshooting,
special voltage inputs and data output.
The Jerome®631-X is easy to operate and ready for use upon receipt from the factory.
•Remove the instrument from the packing material.
Retain all packaging materials for any future shipment of the
instrument.
If the instrument is returned to AMETEK BROOKFIELD for any
reason, it must be placed in the original packaging materials that
have been tested and proven to be effective protection during
shipment.
•Call AMETEK BROOKFIELD Customer Service at 800-528-7411 or 602-470-1414 for
Return Material Authorization (RMA) information prior to returning a unit.
•For all shipments, boxes and packing materials are available from AMETEK
BROOKFIELD.
•Pack the Jerome®instrument only in a Jerome®shipping container.
AMETEK BROOKFIELD WILL NOT BE RESPONSIBLE FOR SHIPPING
DAMAGE.
IF YOU RETURN THE INSTRUMENT IMPROPERLY PACKAGED OR
SHIPPED,
YOU SHOULD INSURE IT FOR FULL VALUE.
•Check for any damage and confirm receipt of all parts on
your packing list. Contact Ametek Brookfield Customer
Service at [phone] or [phone] if you have
any questions.
•Press the ON button. The display should read 000 in less
than one second.
➢A LO BAT message appears briefly in the upper left
corner.
➢If the LO BAT light persists, recharge the battery.
See page 17.
•Check the voltage setting (110 or 220 VAC) on the back of the
instrument. Ensure that it is set to the correct voltage. If the
pointer is not aligned to the local voltage, turn the selector to
point to the correct voltage.

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700-0037 Rev 1.0
•Perform a sensor regeneration by following these steps:
➢Connect the line cord between the connector on the back of the 631-X and an AC power
outlet.
➢Press the ON switch and then press the REGEN button.
The instrument will begin a 10-minute regeneration cycle, indicated by .H.H.H flashing
on the display. Do not interrupt this cycle. For a complete description of this process,
see page 12.
If any error message, such as .P.P.P, appears on the display, see the “Troubleshooting”
section beginning on page 24.
•When regeneration is complete, zero the sensor by pressing the ZERO button and turning
the zero adjust screw, located under the handle, until the display reads 0.
•The instrument is now ready to sample.
•To ensure the input to the instrument contains no hydrogen sulfide or mercaptans, use a
Zero Air Filter, AMETEK BROOKFIELD P/N Z2600 3905. The Zero Air Filter cleans the
air sample and should produce sample readings of less than 0.003 ppm. Therefore, use the
filter to:
➢Equilibrate the instrument to temperatures that are higher or lower than the instrument.
Sample with filter installed until the reading is below 0.003 ppm.
➢Identify contamination within the unit.
➢Confirm the presence of hydrogen sulfide when readings are elevated. Install filter and
verify that the readings go down with filter installed.
•When the instrument measures hydrogen sulfide, the zero display will be replaced with a
value.
CAUTION
Do not adjust the ZERO after the instrument has measured hydrogen sulfide
or before the next regeneration. (Occasionally the display may drop to .L.L.L
(indicating low) between the initial zeroing and the first sample. It is OK to
readjust the ZERO if the instrument has not measured hydrogen sulfide.)
•The instrument is designed for ambient air monitoring. DO NOT allow the probe or the
instrument’s intake to be exposed to any liquid.
•The instrument is not explosion proof.
•Press the SAMPLE button to start a 10 second sampling cycle.
•Perform sensor regeneration after each day’s testing.
•Perform another sensor regeneration and re-zero the instrument before each day’s use.
•Perform sensor regeneration after 30 days of storage or inactivity.
Note: There are two different versions of the 631-X, and they can be distinguished by a small
‘SMV’ label located above the serial label on the back of the instrument. In this manual, when it is
necessary to distinguish between the two versions, they are referred to as ‘SMV’ instruments or
‘Non-SMV’ instruments. Check for the ‘SMV’ label on your instrument to determine which steps
apply to your instrument. ‘SMV’ instruments can be purchased with the Option Functionality
and/or the Data Logger Functionality if desired.
Call AMETEK BROOKFIELD Customer Service, at [phone] from the United States
and Canada or [phone] if you have any questions. If you prefer, you may send e-mail
to customerservi[email protected]

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700-0037 Rev 1.0
2. INTRODUCTION
The Jerome®631-X Hydrogen Sulfide Analyzer is an ambient air analyzer with a range of 0.003
ppm to 50 ppm (parts per million).
CAUTION:
The Jerome®631-X is for vapor use only.
DO NOT allow the probe or the instrument's intake
to be exposed to any liquid, dust
or other foreign material.
The 631-X is designed to be easy to operate for quick and accurate analysis of hydrogen sulfide
vapor levels. It has few maintenance requirements. However, please take a moment to read this
manual before attempting operation. If you have any questions about your application or
operation, please call AMETEK BROOKFIELD Customer Service at [phone] or (602)
470-1414 or e-mail customerservic[email protected] for assistance.
631-X Features
•Accurate analysis of hydrogen sulfide in seconds
•Wide detection range allows multiple applications
•Survey mode for rapid source detection of hydrogen sulfide concentrations
•Rechargeable internal battery pack for portability
•Automatic backlight for LCD during low light conditions
•Microprocessor ensures a linear response throughout the entire range of the sensor
•Inherently stable gold film sensor
Optional Accessories
•Data Logger to record field monitoring information
•Jerome®Communication Software (JCS) Kit for unattended fixed-point sampling and
downloading information from the Data Logger to a computer.
•Option Functionality (factory installed option) for external fresh air solenoid support, auto-
zeroing, DC power operation, timed regeneration, 4-20 mA or 0-2 V analog output, and
timed sampling
•Functional Test Module (FTM) (P/N Z2600 0918 or Z2600 0930) and Accessory Kit
(Y2600 0920), for field verification of instrument functionality.
•Field Carrying Cases, hard sided P/N Y411 0904 or soft P/N 1400 0052, for versatile
handling and additional storage
•Maintenance Kit, P/N Y631 0905 for routine maintenance and upkeep

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700-0037 Rev 1.0
Applications
•Ambient air analysis
•Odor nuisance monitoring
•Regulatory compliance
•Control room corrosion monitoring
•Quality assurance and quality control
•Scrubber efficiency testing
•Accuracy check for other hydrogen sulfide monitors and control systems
•Hydrogen sulfide source detection
•Leak detection
•Portable hydrogen sulfide detection
The Jerome®631-X can be operated from 100-120 or 200-240 VAC. To change the default
voltage range, refer to “Setting the Input Voltage” on page 21.
3. PRINCIPLE OF OPERATION
A thin gold film, in the presence of hydrogen sulfide, undergoes an increase in electrical resistance
proportional to the mass of hydrogen sulfide in the sample.
When the SAMPLE button is pressed, an internal pump pulls ambient air over the gold film sensor
for a precise period. The sensor absorbs the hydrogen sulfide. The instrument determines the
amount absorbed and displays the measured concentration of hydrogen sulfide in ppm. During
normal sampling, the ambient air sample is diluted in the flow system at a ratio of 100:1. When
sampling in Range 0, (where low levels of hydrogen sulfide are expected) undiluted air samples
are drawn across the gold film sensor.
The instrument’s microprocessor automatically re-zeroes the digital meter at the start of each
sample cycle and freezes the meter reading until the next sample cycle is activated, thus
eliminating drift between samples.
During the sample mode cycle, bars on the LCD represent the percentage of sensor saturation.
Depending on the concentrations, 50 to 500 samples may be taken before the sensor reaches
saturation. At that point, a 10-minute heat cycle must be initiated to remove the accumulated
hydrogen sulfide from the sensor. During the sensor regeneration cycle, both solenoids are closed
to cause air to pass through a scrubber filter and provide clean air for the regeneration process. The
flow system’s final scrubber filter prevents contamination of the environment.
The heat generated during the regeneration may cause some low-level thermal drift. To ensure
maximum sample accuracy, wait 30 minutes after regeneration before zeroing and using the
instrument.

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700-0037 Rev 1.0
Zero Air Filter
The Zero Air Filter removes mercury vapor, mercaptans, and hydrogen sulfide from the air
sample. Readings with the filter installed should be near zero.
Because air that is cooler than the instrument will cause low readings and warmer air will cause
higher readings, the Zero Air Filter should be used to equilibrate the unit to ambient air
temperature. Continuous sampling with clean air will not cause saturation of the gold film sensor
but will equalize temperatures faster to allow accurate analysis to begin sooner. For best results, be
sure that the instrument is at the same temperature as the environment before testing.
The Zero Air Filter can also be used to identify contamination within the instrument. If the
readings do not reduce to near zero with the filter installed, contamination should be suspected. If
the readings do drop to near zero with the filter installed but elevate with the filter removed, the
presence of hydrogen sulfide at the sampled location is confirmed.
For more information on the use of the Zero Air Filter, contact customer service at 1-800-528-
7411, 1-602-470-1414, or visit our web site at. https://www.brookfieldengineering.com/
Gas Flow Schematics

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700-0037 Rev 1.0

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700-0037 Rev 1.0
4. INSTRUMENT OPERATION
LCD Codes
LCD CODE
EXPLANATION
000
Ready to sample
.000
No hydrogen sulfide reading
.8.8.8
Sensor saturated-regeneration needed (refer to page 12)
.H.H.H
Sensor regeneration in progress (.H.H.H flashes)
.L.L.L
Re-zero needed (refer to page 13)
.P.P.P
Power cord required or low line power, <100 VAC (or 200 VAC)
(see pages 16 and 17, Changing the Fuse, if .P.P.P remains on after
the cord is connected.)
.LO BAT
Recharge batteries (refer to page 17)
.E.E.E
Same as LO BAT, automatically shuts off
.HL
Very high concentration has been detected. Refer to your safety
policy for additional direction to confirm the concentrations."
DURING SAMPLING
.-
0-25% sensor saturation
.--
25-50% sensor saturation
.---
50-75% sensor saturation
-.---
75-100% sensor saturation
DURING SAMPLING, USING SURVEY MODE
-
Survey sampling (minus sign flashes continuously)
WHEN ZERO IS
DEPRESSED
Adjust to 0 only after sensor regeneration. It is normal for the
display to read H after sampling has started.
0
Zero, ready to sample
H
High, turn Zero potentiometer counterclockwise
L
Low, turn Zero potentiometer clockwise

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700-0037 Rev 1.0
Daily Operations
Before each day's use of the Jerome®631-X, perform the following steps to verify proper
instrument operation:
•Press the power ON button.
➢The digital meter displays 000.
(Disregard the digital meter's initial momentary reading.)
Recharge or replace the battery pack if the LO BAT indicator REMAINS ON. Refer to
“Charging Batteries” on page 17 and/or “Replacing the Battery Pack” on page 21.
To ensure the instrument's electronics have stabilized, allow a 1-minute warm up
before beginning the next step.
•Use the Zero Air Filter to equilibrate the instrument to ambient air temperature.
➢Install the Zero Air Filter in the instrument’s intake.
➢Sample continuously until the readings stabilize.
•Perform sensor regeneration. Refer to page 12 for the procedure.
•Thirty minutes after sensor regeneration is complete, zero the instrument. See page 13.
NOTE: For maximum accuracy, such as when testing with the Functional Test Module,
wait 30 minutes after the sensor regeneration cycle to re-zero the unit. For immediate
use, the unit can be re-zeroed immediately after sensor regeneration. See the notes on
page 13.
•Press the SAMPLE button.
➢During the sample cycle, the digital meter displays
bars (-, --, or ---) to indicate the amount of sensor
saturation.
•At the end of the sampling cycle, read the digital
meter.
➢The number shown on the digital meter is the
hydrogen sulfide concentration in ppm.
➢This value remains on the display until the next
sample is taken.
➢The digital meter automatically zeroes at the start
of each sample.
•At the end of each day's use, perform sensor
regeneration as described in the next section.
DO NOT ALLOW HYDROGEN SULFIDE TO STAY
ON THE GOLD FILM SENSOR OVERNIGHT.

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700-0037 Rev 1.0
Sensor Regeneration
Sensor regeneration is needed to clear the 631-X sensor of any accumulated hydrogen sulfide.
This simple procedure should be done:
•At the beginning of the day on which the instrument is to be used.
•During the day when the sensor becomes saturated.
•At the end of the day before storing the instrument.
CAUTION:
Ensure the voltage selector on the back of the instrument, near the power
cord inlet connector, points to the local AC power value. See “Setting the
Input Voltage” on page 21.
To clean and protect the sensor, the supplied AC power must be 100 to
120 VAC or 220 to 240 VAC, depending on the available power source.
Once sensor regeneration is initiated, DO NOT interrupt the cycle.
•Attach the power cord to the 631-X and plug it into AC power. AC power is required to
thermally regenerate the sensor.
•Press the power ON button.
•Press the REGEN button.
➢The digital meter flashes .H.H.H for the duration of the 10-minute cycle and displays
.0.0.0 when the cycle is completed.
DO NOT INTERRUPT THIS CYCLE.
Wait until the cycle is completed before continuing with the next step.
•A minimum 30-minute wait after the sensor regeneration cycle is complete ensures
maximum sample accuracy. However, the unit can be used immediately following the
sensor regeneration if necessary. When the sensor regeneration is complete, press ZERO
and adjust the ZERO ADJUST pot until 0 appears on the display. Install the zero-air
filter in the intake and take several samples or lock the instrument into survey mode (see
page 15). After approximately one minute, stop sampling and check the ZERO. Adjust to
0. Repeat sampling through the zero-air filter until reading remains on 0.
NOTE: The digital meter will read .P.P.P after REGEN is activated if the power cord is not
plugged in or if the instrument's fuse needs to be replaced. Connect the power cord, or if
necessary, replace the fuse. See “Changing the Fuse” on page 22.

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700-0037 Rev 1.0
Zero Adjust
•To ensure air entering the instrument is clean, install the zero-air filter in the instrument’s
intake and sample until the readings stabilize.
•While pressing the ZERO button, turn the ZERO ADJUST
potentiometer (shown at right) using the trimmer tool until
the digital meter reads 0.
➢If the LCD reads H, turn the ZERO ADJUST counter-
clockwise;
➢If the LCD reads L, turn the ZERO ADJUST clockwise.
NOTE: A minimum 30-minute wait after the sensor regeneration cycle is
complete ensures maximum sample accuracy. The unit can be used immediately
following the sensor regeneration if necessary. When the sensor regeneration is
complete, press ZERO and adjust the ZERO ADJUST pot until 0 appears on the
display. Install the zero-air filter in the intake and take several samples or lock
the instrument into survey mode (see page 15). After approximately one minute,
stop sampling and check the ZERO. Adjust to 0 if necessary. Repeat sampling
through the zero-air filter until sensor remains on 0.
NOTE: When ZERO is pressed, depending upon internal configuration, a
number between 00 and 100 may appear on the display instead of H, L, or O.
See APPENDIX C - INTERNAL DIP SWITCH SETTINGS, on page 39, for
details. If the instrument is configured with Option Functionality, see
APPENDIX D - JEROME®631-X OPTION FUNCTIONALITY beginning on
page 40.
CAUTION:
Do not turn the ZERO ADJUST potentiometer between samples.
Turn the ZERO ADJUST only after a sensor regeneration cycle, otherwise
invalid readings will result.
•Press the power OFF button and disconnect the power cord.
•The Jerome®631-X is ready for sampling.
CAUTION:
The Jerome®631-X is intended for vapor use only. DO NOT
allow the probe or the instrument's intake to be exposed to
liquids, dust, or other foreign material. Moisture or liquids
drawn into the instrument can damage the sensor and flow
system.

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700-0037 Rev 1.0
Sample Mode
This is the standard operation mode and is used for optimum accuracy.
•Press the power ON button.
➢The LCD displays 000.
➢Disregard the LCD's initial momentary readings.
➢Recharge or replace the battery pack if the LO BAT indicator REMAINS ON, see page 17
and/or page 21 if necessary.
•Allow a 1-minute warm up before beginning the next step to ensure the instrument's
electronics have stabilized.
•Press the SAMPLE button.
➢During the sampling cycle, the bar (or bars) shown on the LCD indicates the current
percentage of sensor saturation. (Refer to “LCD Codes” on page 10 for code
descriptions.)
➢The length of the sample cycle depends on the concentration of hydrogen sulfide.
RANGE
CONCENTRATION
RESPONSE TIME
ACCURACY at MID-RANGE
0
0.001 to 0 .099 ppm
30 Seconds
± 0.003ppm at 0.050ppm
1
0.10 to 0.99 ppm
25 Seconds
± 0.03ppm at 0.50ppm
2
1.0 to 9.9 ppm
16 Seconds
± 0.3ppm at 5.0ppm
3
10 to 50 ppm
13 Seconds
± 2ppm at 25ppm
•At the end of the sampling cycle, read the LCD.
➢The number shown on the digital meter is the hydrogen sulfide concentration in ppm.
➢As the instrument auto-ranges, the decimal point moves to the correct position to show the
concentration.
➢The value remains displayed until the next sample is taken. The digital meter will then
automatically zero before displaying the next sample value.
➢When elevated readings are detected:
Confirm the reading by taking an additional sample.
Install the zero-air filter and verify that the readings reduce to zero or very near zero.
Remove the filter and sample the location again to verify that elevated readings do
exist.
➢When the sensor is completely saturated, the LCD displays .8.8.8 instead of a value. No
further operation is possible until sensor regeneration is performed. (Refer to “Sensor
Regeneration” on page 12.)
•Press the power OFF button when not in use.
Note: The Jerome®631-X operates approximately six (6) hours on a fully charged battery.

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Survey Mode
The survey mode takes samples every 3 to 20 seconds automatically. The length of time varies
with the hydrogen sulfide concentration. Use this mode to locate the source of hydrogen sulfide,
such as a leak, a hot spot, or to assess areas of potentially high hydrogen sulfide concentrations.
After the survey mode is activated, the 631-X samples continuously.
•Press the power ON button.
➢The digital meter displays 000.
➢Disregard the LCD’s initial momentary readings.
➢Recharge or replace the battery pack if the LO BAT indicator REMAINS ON, see page 17
and/or page 21 if necessary.
•Allow a 1-minute warm up before beginning the next step to ensure the instrument's
electronics have stabilized.
•Lock the instrument in the survey mode:
➢Hold the SAMPLE button down until the sensor status indicator bar(s) begin flashing on
the display.
➢Press the ZERO button, then release the SAMPLE button.
➢The pump should continue to run, and the display should update every survey cycle.
•The instrument remains in the survey mode until one of the following occurs:
➢The sensor is saturated.
➢A LO BAT (low battery) signal is encountered.
➢An HL (high hydrogen sulfide level) is encountered.
➢The instrument is turned OFF.
•Press the power OFF button to end the survey mode.
RANGE
CONCENTRATION
RESPONSE TIME
0
0.001 to 0 .099 ppm
20 Seconds
1
0.10 to 0.99 ppm
15 Seconds
2
1.0 to 9.9 ppm
6 Seconds
3
10 to 50 ppm
3 Seconds
NOTE: Approximately 100 samples at 0.5 ppm may be taken before the sensor saturates and
regeneration is required.

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700-0037 Rev 1.0
Operating on AC Power or Generator
•For stationary use, the 631-X may be operated on AC power.
➢Operating the instrument on AC power at all times eliminates the need for the battery
pack and its necessary maintenance.
➢The battery may be unplugged or removed completely whenever the instrument is
operating on AC power.
•When a generator is used to power the Jerome®631-X, a high-quality line conditioner or
voltage regulator is required to ensure a pure sine wave and regulated voltage is applied to
the instrument. The gold film sensor may be damaged by voltage that varies in amplitude or
by surges, spikes, and/or noise on the power line.
Operating on Internal Battery Power
•For portable use, the 631-X may be operated on Battery power.
➢When you operate the instrument on battery power, please be aware of the following:
A fully charged battery pack, AMETEK BROOKFIELD P/N Z4000 0907 (115V) or
Z4000 0908 (230V), provides power for a minimum of six (6) hours of operation.
For operating more than six (6) hours, an extra fully charged battery pack is needed.
Complete battery recharging takes 14 hours. Refer to Charging Batteries on page 17.
The 631-X uses a rechargeable Nickel Cadmium (NiCad) battery. Dispose of worn-out
batteries properly when you are replacing the battery pack.
External battery power
A special version of the Jerome®631-X and a DC Power Kit are available to operate the
instrument from a secondary DC source. The source may be a car/truck battery, or a storage cell
used in conjunction with solar panels.
Call AMETEK BROOKFIELD Customer Service at 800-528-7411, 602-470-1414, or e-mail
custome[email protected]m for additional information.

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700-0037 Rev 1.0
Charging Batteries
•Press the power OFF button.
•Connect the AC power cord between the 631-X power receptacle and an AC power source.
➢Complete battery recharging takes 14 hours.
➢The 631-X contains a trickle charger so it may be continually plugged into an AC power
source without damaging the battery pack.
•The battery pack may be charged outside the instrument with an optional AMETEK
BROOKFIELD IDC Battery Charger. (AMETEK BROOKFIELD P/N 4000-1011, for 115
VAC, P/N 4000-1012, for 230 VAC)
Obtaining Maximum Battery Life
There are certain inherent limitations to NiCad batteries. The primary limitation is a memory
effect that occurs when the batteries are partially discharged and then recharged, repeatedly. This
memory leads to a drastic reduction in the usable battery life. To prevent this memory effect,
periodically allow the battery pack to discharge completely, and then recharge the battery pack.
•To obtain maximum battery life, follow these three (3) steps:
➢At least once a month wait until LO BAT appears on the digital meter before recharging
the battery pack.
➢Charge the battery pack when the LO BAT indicator comes on. Excessive discharge can
damage the battery pack.
➢Before storing the instrument verify the power is OFF.
•When the batteries fail to hold a charge, the battery pack should be replaced.
➢Battery life under normal usage is approximately 1 year, depending on the number of
charge and discharge cycles.

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5. MAINTENANCE
Preventive Maintenance Calendar
To keep the Jerome®631-X operating at peak performance, follow the maintenance schedule
below as a guide. Since maintenance is more a function of application and amount of use rather
than time, your requirements may be different from the listed schedule. Call AMETEK
BROOKFIELD Customer Service at 800-528-7411, 602-470-1414, or e-mail
custome[email protected] for additional guidance for your environment and
operation.
PART/COMPONENT
MAINTENANCE CYCLE
REFER TO
PAGE
Charge batteries
At least once per month, after 1 month's storage,
or when LO BAT appears
Page 17
Change 0.25-inch fritware
Weekly or as needed
Page 19
Change internal filters and
tubing
After 6 months of use or as needed
Page 20
Replace zero air filter1
Annually
Factory calibration
Annually
Page 23
Calibration check
Monthly or as needed
Appendix
A, Page 36
Replace batteries
Annually or as needed.
The battery pack contains NiCad batteries.
Dispose of properly.
Page 21
NOTE: Install the zero-air filter into the instrument's intake during storage.
1
Zero air filters, LFS and LFD scrubber filters contain Resisorb®or AddSorb®VA13. Call AMETEK BROOKFIELD
Customer Service at 800-528-7411, 602-470-1414, or e-mail customerse[email protected] for a copy of the
Safety Data Sheet (SDS). Dispose of all filters properly.

Customer Service 800-528-7411 or 602-470-1414 Page 19 of 52
700-0037 Rev 1.0
Flow System
The Jerome®631-X's flow system is the crucial link between the sensor and the sample. For the
instrument to perform correctly, the flow system must be properly maintained. The user
maintainable components of this system are the intake filter (0.25-inch fritware), two scrubber
filters and connecting tubing.
Check the Preventive Maintenance Calendar on page 18, for a suggested schedule for changing
fritware and scrubber filters. The Tygon®tubing in the system must be free of crimps for proper
flow.
Part
Part Number
Scrubber Filter
Z2600 3930
LFS Scrubber Filter
Z2600 3933
LFD Scrubber Filter
Z2600 3934
0.25-inch Fritware Filter
2600 3039
Tygon®Tubing (clear) 1/8" I.D. (1')
345-0050
Tygon®Tubing (clear) 1/16" I.D. (1')
345-0244
Tygon®Fluran Tubing (black) 1/16” I.D. (6”)
345-0257
0.25-inch Fritware Filter
Replace the 0.25-inch fritware filter once each week or as needed. In dusty environments, the
fritware filter may need to be replaced as often as once a day. Replacement 0.25-inch fritware
filters are available from AMETEK BROOKFIELD, Consumable Sales at 800-528-7411 or
602-470-1414.
•Unscrew and remove the intake.
•Push the old fritware filter disc out of the intake with your
trimmer tool.
•Avoid touching the new fritware disc with fingers. Use
tweezers to insert the new fritware.
•Use the blunt end of the trimmer tool to seat the fritware disc
firmly against the inner ledge of the intake.
•Screw the intake back on the Jerome®631-X.
CAUTION:
The stem coming from the instrument onto which the outer intake housing is
attached must be securely held in place. If loose, the tubing inside the
instrument can become twisted when the intake housing is replaced. It may
be necessary to open the instrument and tighten the hold-down nuts inside
the instrument. Call AMETEK BROOKFIELD Customer Service at 800-
528-7411, 601-470-1414, or e-mail c[email protected] if
you have any questions

Customer Service 800-528-7411 or 602-470-1414 Page 20 of 52
700-0037 Rev 1.0
Internal Filters
•Replace the internal filters after six (6) months of use, or as needed.
•Press the power OFF button and unplug the power cord.
•Remove the two (2) side screws from the intake end of the instrument and open the case.
•Carefully disconnect the Tygon®tubing from both ends of the filters and discard the old
filters.
CAUTION:
Scrubber filters contain Resisorb®or AddSorb®VA13. Used filters,
especially the scrubber filter may contain hydrogen sulfide also. Use
proper methods when disposing of used filters. Call AMETEK
BROOKFIELD Customer Service at 800-528-7411, 601-470-1414, or e-
mail [e-mail] a copy of the Resisorb®or
AddSorb®VA13 SDS or for other questions.
•Connect the new filters to the Tygon®tubing, ensuring all straight hose barbs point toward
the intake/pump corner of the case and elbow hose barbs point toward the sensor housing as
shown in the illustration.
➢Push the Tygon®as far as it will go onto the filter fittings.
•Push the filters into the mounting clips.
•Remove any crimps or twists in the tubing and ensure that tubing connections are secure. If
the tubing is loose, readings may not be accurate. Replace any tubing that has deteriorated
due to heat and/or age.
•Close the case and replace the screws.
•Dispose of all filters in accordance with state and federal environmental regulations.