Bacharach 2825 Operation and maintenance manual

CO2Analyzer
2825/2830/2835
Instruction 19-9320
Operation & Maintenance
Rev. 2 – April 2004
Product Leadership • Training • Service • Reliability
Model 2835 Shown
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AInstruction 19-9320
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
alicable secications. 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 one (1) year 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 FOREGOING WARRANTIESARE EXCLUSIVEANDARE GIVENANDACCEPTED
IN LIEU OF (I) ANY AND ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUD-
ING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITYAND
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,ACTUALOR 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 ofcer of Bacharach.
Notice:
Product imrovements and enhancements are continuous, therefore the secications and information
contained in this document may change without notice.
Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequential damages 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.
BACHARACH®is a registered trademark of Bacharach, Inc.
All other trademarks are the property of their respective owners.
Copyright © 2001–2004, Bacharach, Inc., all rights reserved.
Register Your Warranty by Visiting
www.bacharach-inc.com

CO2Analyzer 2825/2830/2835
Instruction 19-9320 i
CO2Analyzer 2825/2830/2835
Contents
1.0 INTRODUCTION................................................................................1
1.1 General .......................................................................................1
1.2 Features......................................................................................1
1.3 Applications................................................................................2
1.4 Instruction Manual....................................................................2
1.5 Measuring Ranges ..................................................................... 2
2.0 OPERATION .......................................................................................3
2.1 Important Note .......................................................................... 3
2.2 Switching Analyzer ON/OFF ....................................................3
2.3 Probe Installation (2830 / 2835)................................................4
2.3.1 Temperature Probe Installation (2830)......................... 4
2.3.2 Temperature & Humidity Probe Installation (2835).... 4
2.4 Pump Operation......................................................................... 5
2.5 Pump Contamination.................................................................5
2.6 Selecting the Measurement to be Displayed ............................6
2.7 Current / Peak Gas Reading Mode ...........................................7
2.8 Storing Readings........................................................................7
2.9 Battery Low Display ..................................................................8
2.10 Battery Charge Display.............................................................8
2.11 Fault Condition Warning ..........................................................8
2.12 Powering Analyzer from Charger .............................................9
2.13 High Humidity Gas Sampling (2825 / 2830) ............................9
2.14 Testing Incubators (2825 / 2830)............................................. 10
3.0 MAINTENANCE ...............................................................................11
3.1 Cleaning ...................................................................................11
3.2 Sunlight ....................................................................................11
3.3 Servicing...................................................................................11
3.4 Software Version / Serial Number ..........................................11
3.5 Factory Settings.......................................................................11
3.6 Battery Charging ..................................................................... 12
3.7 Air Calibration .......................................................................... 13
4.0 PARTS & SERVICE .........................................................................14
4.1 Replacement Parts and Accessories........................................14
4.2 Bacharach Service Centers .....................................................15

CO2Analyzer 2825/2830/2835
ii Instruction 19-9320
CO2Analyzer 2825/2830/2835
Notes

CO2Analyzer 2825/2830/2835
Instruction 19-9320 1
1.0 INTRODUCTION
1.1 General
Bacharach’s line of CO2analyzers are easy to use, but it is essential that
this instruction manual be read, understood, and followed by all operators
and maintenance personnel prior to using or servicing the analyzer.
CO2analyzer models 2825, 2830 and 2835 are all compact and light-
weight instruments that principally measure and display CO2concentra-
tions, with each of the various models offering the ability to also measure
barometric pressure, O2, temperature, and relative humidity.
• 2825 – CO2(0–60%), Pressure, and O2
• 2830 – CO2(0–60%), Pressure, O2, and Temperature
• 2835 – CO2(0–10,000 ppm), Pressure, Temperature,
and Relative Humidity
Each reading is displayed separately on a backlit LCD, with an operator
being able to quickly scroll through all the readings by pressing the f3
button. A peak-gas-reading mode enables an operator to view the highest
gas reading that was taken since the analyzer was switched ON.
Each analyzer can store all measured readings in memory, which can
later be downloaded to a personal computer via its integral IrDA commu-
nications link and the optional BACH-COM software.
1.2 Features
•Normal and peak reading modes
•Up to 10 hours of operation on one charge
•Convenient zero function for all gas sensors
• Internal pump for remote gas sampling
•Long-life sensors (CO2- 10 years; O2- 2 years)
•Infrared CO2sensor and electrochemical O2sensor
•Battery capacity display
•Manual (snapshot) and continuous data logging of readings
with time and date stamp
•Memory capacity for storing 200 sets of data
•IrDA link for downloading stored data to a personal computer
•Charge-and-run capability for long-term monitoring
•Weight: 12 oz
•Dimensions: 5.5"H x 2.5"W x 1.5"D

CO2Analyzer 2825/2830/2835
2Instruction 19-9320
1.3 Applications
• Incubators • Food Packing
• Mushroom Farms • Brewing
• Fruit/Vegetable Storage • Carbonated Drink Dispensing
• Greenhouses • Blended Beer Gases
1.4 Instruction Manual
Unless otherwise noted, all sections in this instruction manual describe
the operation and maintenance of all three CO2analyzer models (2825 /
2830 / 2835).
If a section is relevant to only one or more analyzer models, then the
section heading will contain the name(s) of those models. For example,
section heading 2.3 Probe Installation (2830/2835) indicates that the
information under this heading pertains only to analyzer models 2830
and 2835.
1.5 Measuring Ranges
Measurement Range / Resolution
CO2– High Range (2825 / 2830).................................................0 to 60% / 1%
CO2– Low Range (2835)......................................... 0 to 10,000 ppm / 10 ppm
O2(2825 / 2830) ..........................................................................0 to 30% / 1 %
Barometric Pressure (2825 / 2830 / 2835).................. 21 to 36" Hg / 0.01" Hg
Temperature (2830 / 2835) ..................................................0 to 104°F / 0.1°F
Relative Humidity (2835) ........................................................0 to 99.9% / 1%

CO2Analyzer 2825/2830/2835
Instruction 19-9320 3
2.0 OPERATION
2.1 Important Note
Always ensure that the analyzer’s gas inlet connector (Figure 1, Item A)
and gas exhaust (Figure 1, Item B) are unobstructed and open to the at-
mosphere. Be careful not to breath directly on the analyzer while taking
a measurement; otherwise, inaccurate readings will result.
2.2 Switching Analyzer ON/OFF
Switch ON the analyzer by pressing the button. Switch the analyzer
OFF by pressing the button down for at least 3 seconds, or until the
display goes blank. When rst switched on, there is an approximate
60 second warm-up period before the CO2level is displayed, and 3 min-
utes before the O2level is displayed. Note that normal fresh air back-
ground readings are 340 ppm CO2and 21% O2.
Figure 1. Components of the CO2Analyzer
A - Gas inlet tting
B - Gas outlet tting
C - LCD display
D - Temperature and humidity
sensor probe (Model 2835)
E - IrDA link
F - Pump ON light
G - Press once to switch analyzer
ON; press once to start and stop
pump; hold 3 seconds to switch
analyzer OFF ( )
H - Battery charging socket
I - Press once to store data; hold to
start and stop data-logging (f1)
J - Press once for battery level; hold
to start Air Calibration (f2)
K - Press once to scroll through
measurement channels; hold for
peak gas reading (f3)
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CO2Analyzer 2825/2830/2835
4Instruction 19-9320
2.3 Probe Installation (2830 / 2835)
Figure 3. Temperature &
Humidity Probe Installation
Figure 2. Temperature
Probe Installation
2.3.1 Temperature Probe
Installation (2830)
The 2030 Analyzer’s temperature sensor
is mounted in a hand-held probe assem-
bly that plugs into a separate socket on
top of the analyzer (Figure 2).
Before installing the probe, turn the an-
alyzer OFF. Align the slot on the probe
connector with the tab on the analyzer’s
mating socket; then push the probe con-
nector onto its socket until it bottoms.
Remove the probe connector by pulling
it straight up.
2.3.2 Temperature & Humidity
Probe Installation (2835)
The 2835 Analyzer’s temperature and
humidity sensors are mounted in a rigid
probe assembly that attaches to a sepa-
rate connector on top of the analyzer
(Figure 3).
Before installing the probe, turn the
analyzer OFF. Turn the probe’s locking
collar on the analyzer so that all dots
line up. Align the dot on the probe with
the dots on the locking collar; then push
the probe into its socket until it bottoms.
Now lock the probe into place by turning
the locking collar to its locked position.
To remove the probe, rst turn the locking collar to its unlocked position;
then pull the probe straight up.

CO2Analyzer 2825/2830/2835
Instruction 19-9320 5
2.4 Pump Operation
With the analyzer already switched ON, momentarily pressing the
button will start and stop the internal pump. The optional Extended
Probe Assembly with in-line lter (P/N 19-3310) can be connected to the
gas inlet tting (Figure 1, Item A) on the top of the analyzer for drawing
gas samples from hard-to-reach areas. If desired, a section of 1/8" I.D.
tubing can be connected to the gas outlet tting (Figure 1, Item B) to
exhaust the gas being sampled to an outside area.
Note that the combined sampling hose and probe length should not
exceed 6 feet (1.8 m). Also note that the internal pump is intended for
use only at normal atmospheric pressure, and is not designed to draw
in gas samples against a vacuum or an obstruction such as a kink in the
sampling hose. If an obstruction or negative-pressure gradient is present,
then gas will not be drawn into the analyzer. Please consult the factory
for applications where longer sampling lengths are required, or where it
is necessary to draw against a vacuum.
2.5 Pump Contamination
Over time the pump can become contaminated, leading to a slower
response time and lower readings. To check for pump contamination,
turn the pump ON and hold your index nger over the inlet tting. The
pump should normally stall. If the pump, however, continues to run, then
the pump is contaminated and the analyzer needs to be returned to a
Bacharach Service Center for repair (refer to Section 4.2).

CO2Analyzer 2825/2830/2835
6Instruction 19-9320
2.6 Selecting the Measurement to be Displayed
Depending upon the analyzer model, several different gases and environ-
mental measurements can be taken as described in Section 1.1 General.
Important! For the 2830/2835 analyzer to display accurate
temperature readings, the temperature probe must be in-
stalled per Section 2.3. Note that if the temperature probe is
removed, the analyzer will continue to provide accurate read-
ings for all other measurements.
Each measurement is displayed separately on the analyzer’s LCD (Fig-
ure 1, Item C). The measurement displayed is selected by pressing the f3
button.
Each time the f3button is pressed, the display scrolls through the follow-
ing measurements:
CO2 ppm
340
Baro"Hg
28.79
O2%
21
Temp F
72.4
RH %
45
Carbon Dioxide
(2825 / 2830 / 2835)
Oxygen
(2825 / 2830)
Temperature
(2830 / 2835)
Barometric Pressure
(2825 / 2830 / 2835)
Relative Humidity
(2835)
‘Please Wait’ will be displayed
if the O2cell is still warming up
(approx. 3 min.)