TSI Alnor VOC Operating Manual

VOLATILE ORGANIC COMPOUND

PROBES

MODELS 984, 985, 986 AND 987

OPERATION AND SERVICE MANUAL

P/N 6007661, REVISION A

FEBRUARY 2014

Copyright
TSI Incorporated / 2014 / All rights reserved.

Address

TSI Incorporated / 500 Cardigan Road / Shoreview, MN 55126 / USA

Fax No.

[phone]
LIMITATION OF WARRANTY AND LIABILITY (effective June 2011)

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Seller warrants the goods sold hereunder, under normal use and service as described in

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limited warranty is subject to the following exclusions and exceptions:

a. Hot-wire or hot-film sensors used with research anemometers, and certain other

components when indicated in specifications, are warranted for 90 days from the date
of shipment;

b. Pumps are warranted for hours of operation as set forth in product or operator’s

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c. Parts repaired or replaced as a result of repair services are warranted to be free from

defects in workmanship and material, under normal use, for 90 days from the date of
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i

Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND
LIABILITY, which contains the complete and exclusive limited warranty of Seller. This
LIMITATION OF WARRANTY AND LIABILITY may not be amended, modified or its terms
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ii

CONTENTS

INTRODUCTION ................................................................................. V

CHAPTER 1 UNPACKING AND PARTS IDENTIFICATION ............ 1

CHAPTER 2 SETTING-UP ................................................................. 3

Connecting the VOC Probe to Instrument ...................................... 3

Using the Probe .............................................................................. 3

Configuring the Probe and Instrument ........................................... 4

DISPLAY SETUP ................................................................................. 4

SETTINGS ......................................................................................... 5

VOC SETUP ....................................................................................... 6

DATA LOGGING ................................................................................. 7

Measurements ........................................................................... 7

CHAPTER 3 RESPONSE FACTORS ................................................ 9

CHAPTER 4 FIELD TESTING AND CALIBRATION ....................... 19

Overview ....................................................................................... 19

Probe Verification ......................................................................... 19

TSI Recommended Accessories for Testing or Calibrating

PID Probes ................................................................................... 20

Example 1 (ppb) ...................................................................... 20

Example 2 (ppm) ..................................................................... 20

PID Probe Calibration ................................................................... 21

Accessing the Calibration Menu ................................................... 21

Calibrate VOC ............................................................................... 22

Calibrate CO2 ................................................................................ 23

Requirements ............................................................................... 23

Calibrate Temp ............................................................................. 25

Calibrate %RH .............................................................................. 26

RESTORE FACTORY CAL ..................................................... 26

CHAPTER 5 PROBE MAINTENANCE ............................................ 27

Removing the Electrode Stack and Lamp .................................... 27

Cleaning the PID Lamp................................................................. 29

PID Lamp Cleaning Kit P/N 801782 ............................................. 30

Hazard identification: .................................................................... 30

Storage: ........................................................................................ 30

Handling: ....................................................................................... 30

Replacing the Lamp ...................................................................... 30

Replacing the Electrode Stack ..................................................... 31

iii

Discarding the Electrode Stack ..................................................... 31

Refitting Electrode Stack and Lamp ............................................. 31

Spare Components ....................................................................... 32

Recalibration ................................................................................. 32

CHAPTER 6 TROUBLESHOOTING ................................................ 33

APPENDIX A SPECIFICATIONS ..................................................... 35

iv

Introduction

TSI measures Volatile Organic Compounds (VOCs) in air by using
Photo-Ionization Detection (PID). A PID sensor uses an ultraviolet
(UV) light source to break down VOCs in the air into positive and
negative ions. The PID sensor then detects or measures the charge
of the ionized gas, with the charge being a function of the
concentration of VOCs in the air.

TSI VOC probes are designed for evaluating or investigating indoor
air quality (IAQ) conditions and are best suited for ambient, non­hazardous conditions. Common passive sensor monitoring
applications include evaluating off-gassing of new building
construction materials, point source location, comparing complaint to
non-complaint areas and sensitization investigations.

The potential for adverse health effects depends on the type of
chemical, concentration in air, time of exposure, and personal
sensitivity to any specific VOC.

v

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vi

Model 984

Low concentration (ppb) VOC and temperature

Model 985

High concentration (ppm) VOC and temperature

Model 986

Low concentration (ppb) VOC, temperature, CO2 and
humidity

Model 987

High concentration (ppm) VOC, temperature, CO2
and humidity

Chapter 1

Unpacking and Parts Identification

Carefully unpack the probe from the shipping container. Check the
individual parts against the list of components below. If anything is
missing or damaged, notify TSI immediately.

1. Probe

2. VOC calibration collar

3. CO2 calibration collar (included with Models 986 and 987)

4. Calibration certificate

5. Manual

1

2

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Chapter 1

“D” Shaped

mini-DIN connector

Chapter 2

Setting-up

Connecting the VOC Probe to Instrument

The VOC probes have a “D” shape overmolding on the mini-DIN
connector which must align with the connector at the base of the
multi-functional instrument models 9565-X, 9565-P, TA465-X,
TA465-P and 7575-X. This will ensure the probe is properly
connected and remains so during use.

Using the Probe

The sensing probe relies on the diffusion of air. For best results, try to
keep the sensing probe surrounded by moving air. Do not breathe on
the probe.

Humans exhale CO2 levels exceeding 10,000 ppm and it may take
time for the probes that measure CO2 to re-stabilize, and high
humidity from your breath can cause condensation on the UV light
source in the PID sensor.

3

Configuring the Probe and Instrument

DISPLAY SETUP

Display Setup menu is where you will setup the desired parameters to

be displayed on the instrument screen. With a parameter highlighted
you can then use the ON soft key to have it show up on the instrument
screen or select the OFF soft key to turn off the parameter. Use
PRIMARY soft key to have a parameter show up on the instrument
screen in a larger display. A total of 5 parameters can be shown on
the display, 1 primary (large font) and 4 secondary. Parameters
shown in the Display Setup screen are dependent on the type of
probe currently connected.

4 Chapter 2

SETTINGS

Settings menu is where you can set the general settings. These

include Language, Beeper, Select Units, Time Constant, Contrast,
Set Time, Set Date, Time Format, Date Format, Number Format,
Backlight, and Auto Off.

Use the or  keys to select an option, and the  or  soft keys to
change the settings for each option. Press the key to accept
settings.

Setting-up 5

VOC SETUP

The Response Factor of a specific gas can be inputted by the user.
 The response Factor is used to calculate the actual concentration

of a specific VOC.

 Reset Isobutylene will restore the factory to factory conditions for

Isobutylene (56.11).

6 Chapter 2

DATA LOGGING

Measurements

Measurements to be logged to memory are independent of
measurements on the display, and must therefore be selected under
DATA LOGGING  Measurements.

 When set to ON, measurement will be logged to memory.
 When set to DISPLAY, measurement will be logged to memory if

it is visible on the main running screen.

 When set to OFF, measurement will not be logged to memory
Refer to the instrument manual (Chapter 3: Data Logging →

“LogMode/Log Settings”) for information on the different logging
formats available.

Setting-up 7

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8 Chapter 2

Gas/ VOC

The most common name for the VOC.

CAS No.

Find the VOC using the CAS No.

Formula

To assist in identifying the VOC and to determine
the VOC’s molecular weight.

Response
Factor (RF)

Multiply the displayed concentration by the
Response Factor to calculate the actual
concentration of the VOC.

NOTE: The Response Factor (RF) can be
programmed into the instrument via the VOC
SETUP menu.

Chapter 3

Response Factors

TSI Volatile Organic Compound (VOC) probes are calibrated using
isobutylene, but the sensor’s Photo Ionization Detector (PID) is a
broadband VOC detector with a sensitivity that differs for each VOC
compound.

PID lamps can be created with a number of gasses, each of which
has different photon energy. TSI’s PID probes use Krypton gas, with
photon energy of 10.6 eV (Electron Volt) that offers a long lamp life
and responds to a wide range of gases.

If you know what VOC you are measuring, the table in this section will
allow you to calculate the real concentration for your specific VOC
that responds to a 10.6 eV lamp source.

NOTE: These are approximate values, so for best accuracy, you
should calibrate with the relevant VOC.

NOTE: TSI PID sensors cannot measure all VOCs or gases. VOCs
that have an electron-volt potential greater than or equal (≥) to

10.6 eV will give no response since they cannot be ionized by the

10.6 eV lamp source. Semi-Volatile Organic Compounds (SVOC)
cannot be measured if the vapor pressure is too low (a few ppm at
20°C) to volatize the compound.

The table includes four columns:

9

10 Chapter 3

Gas/VOC

CAS No.

Formula

Response Factor

Acetaldehyde

75-07-0

C2H4O

4.9

Acetic Acid

64-17-7

C2H4O2

36.2

Acetic Anhydride

108-24-7

C4H6O3

4.0

Acetone

67-64-1

C3H6O

0.7

Acrolein

107-02-8

C3H4O

4.0

Acrylic Acid

79-10-7

C3H4O2

2.7

Allyl alcohol

107-18-6

C3H6O

2.1

Allyl chloride

107-05-1

C3H5Cl

4.5

Ammonia

7664-41-7

H3N

8.5

Amyl acetate, n-

628-63-7

C7H14O2

1.8

Amyl alcohol

71-41-0

C5H12O

3.2

Aniline

62-53-3

C6H7N

0.5

Anisole

100-66-3

C7H8O

0.5

Arsine

7784-42-1

AsH3

2.5

Asphalt, petroleum fumes

8052-42-4

C6H6

1.0

Benzaldehyde

100-52-7

C7H6O

0.9

Benzene

71-43-2

C6H6

0.5

Benzenethiol

108-98-5

C6H5SH

0.7

Benzonitrile

100-47-0

C7H5N

0.7

Benzyl alcohol

100-51-6

C7H8O

1.3

Benzyl chloride

100-44-7

C7H7Cl

0.6

Benzyl formate

104-57-4

C8H8O2

0.8

Biphenyl

92-52-4

C12H10

0.4

Bis(2,3-epoxypropyl) ether

2238-07-5

C6H10O3

3.0

Bromine

7726-95-6

Br2

20.0

Bromobenzene

108-86-1

C6H5Br

0.7

Bromoethane

74-96-4

C2H5Br

5.0

Bromoethyl methyl ether, 2-

6482-24-2

C3H7OBr

2.5

Bromoform

75-25-2

CHBr3

2.8

Bromopropane, 1-

106-94-5

C3H7Br

1.3

Butadiene

106-99-0

C4H6

0.8

Butadiene diepoxide,1,3-

1464-53-5

C4H6O2

4.0

Butane, n-

106-97-8

C4H10

46.3

Butanol, 1-

71-36-3

C4H10O

4.0

Buten-3-ol, 1-

598-32-3

C4H8O

1.2

Butene, 1-

106-98-9

C4H8

1.3

Butoxyethanol, 2-

111-76-2

C6H14O2

1.1

Butyl acetate, n-

123-86-4

C6H12O2

2.4

Butyl acrylate, n-

141-32-2

C7H12O2

1.5

Butyl lactate

138-22-7

C7H14O3

2.5

Butyl mercaptan

109-79-5

C4H10S

0.5

Butylamine, 2-

513-49-5

C4H11N

0.9

Butylamine, n-

109-73-9

C4H11N

1.0

Camphene

565-00-4

C10H16

0.5

Carbon disulfide

75-15-0

CS2

1.4

Carbon tetrabromide

558-13-4

CBr4

3.0

Response Factors 11

Gas/VOC

CAS No.

Formula

Response Factor

Carvone, R-

6485-40-1

C10H14O

1.0

Chlorine dioxide

10049-04-4

ClO2

1.0

Chloro-1,3-butadiene, 2-

126-99-8

C4H5Cl

3.2

Chlorobenzene

108-90-7

C6H5Cl

0.5

Chloroethanol, 2-

107-07-3

C2H5ClO

10.0

Chloroethyl methyl ether, 2-

627-42-9

C3H7ClO

2.6

Chlorotoluene, o-

95-49-8

C7H7Cl

0.5

Chlorotoluene, p-

108-41-8

C7H7Cl

0.5

Chlorotrifluoroethylene

79-38-9

C2ClF3

1.0

Citral

5392-40-5

C10H16O

1.0

Citronellol

26489-01-0

C10H20O

1.0

Cresol, m-

108-39-4

C7H8O

1.1

Cresol, o-

95-48-7

C7H8O

1.1

Cresol, p-

106-44-5

C7H8O

1.1

Crotonaldehyde

4170-30-3

C4H6O

1.0

Cumene

98-82-8

C9H12

0.6

Cyclohexane

110-82-7

C6H12

1.3

Cyclohexanol

108-93-0

C6H12O

2.9

Cyclohexanone

108-94-1

C6H10O

1.1

Cyclohexene

110-83-8

C6H10

0.8

Cyclohexylamine

108-91-8

C6H13N

1.0

Cyclopentane

287-92-3

C5H10

4.0

Decane, n-

124-18-5

C10H22

1.0

Diacetone alcohol

123-42-2

C6H12O2

0.8

Dibenzoyl peroxide

94-36-0

C14H10O4

0.8

Dibromochloromethane

124-48-1

CHBr2Cl

10.0

Dibromoethane 1,2-

106-93-4

C2H4Br2

2.0

Dibutyl hydrogen phosphate

107-66-4

HC8H18PO4

4.0

Dichloro-1-propene, 2,3-

78-88-6

C3H4Cl2

1.4

Dichloroacetylene

7572-29-4

C2Cl2

5.0

Dichlorobenzene o-

95-50-1

C6H4Cl2

0.5

Dichloroethene, 1,1-

75-35-4

C2H2Cl2

1.0

Dichloroethene, cis-1,2-

156-59-2

C2H2Cl2

0.8

Dichloroethene, trans-1,2-

540-59-0

C2H2Cl2

0.7

Dichloroethylene 1,2-

540-59-0

C2H2Cl2

0.8

Dichloromethane

75-09-2

CH2Cl2

39.0

Dicyclopentadiene

77-73-6

C10H12

0.9

Diesel Fuel

68334-30-5 0.8

Diethyl ether

60-29-7

C4H10O

0.9

Diethyl maleate

141-05-9

C8H12O4

2.0

Diethyl phthalate

84-66-2

C12H14O4

1.0

Diethyl sulphate

64-67-5

C4H10SO4

3.0

Diethyl sulphide

352-93-2

C4H10S

0.6

Diethylamine

109-89-7

C4H11N

1.0

Diethylaminoethanol, 2-

100-37-8

C6H15ON

2.7

Diethylaminopropylamine, 3-

104-78-9

C7H18N2

1.0

Gas/VOC

CAS No.

Formula

Response Factor

Dihydrogen selenide

7783-07-5

H2Se

1.0

Dihydroxybenzene, 1,2

120-80-9

C6H6O2

1.0

Dihydroxybenzene, 1,3

108-46-3

C6H6O2

1.0

Diisobutylene

107-39-1

C8H16

0.6

Diisopropyl ether

108-20-3

C6H14O

0.7

Diisopropylamine

108-18-9

C6H15N

0.7

Diketene

674-82-8

C4H4O2

2.2

Dimethoxymethane

109-87-5

C3H8O2

1.4

Dimethyl cyclohexane, 1,2-

583-57-3

C8H16

1.1

Dimethyl disulphide

624-92-0

C2H6S2

0.2

Dimethyl ether

115-10-6

C2H6O

1.3

Dimethyl phthalate

131-11-3

C10H10O4

1.0

Dimethyl sulphide

75-18-3

C2H6S

0.5

Dimethylacetamide N,N-

127-19-5

C4H9NO

1.3

Dimethylamine

124-40-3

C2H7N

1.4

Dimethylaminoethanol

108-01-0

C4H11NO

1.5

Dimethylaniline, NN-

121-69-7

C8H11N

0.6

Dimethylbutyl acetate

108-84-9

C8H16O2

1.6

Dimethylethylamine, NN-

598-56-1

C4H11N

0.8

Dimethylformamide

68-12-2

C3H7NO

0.9

Dimethylheptan-4-one, 2,6-

108-83-8

C9H18O

0.8

Dimethylhydrazine, 1,1-

57-14-7

C2H8N2

1.0

Dinitrobenzene, m-

99-65-0

C6H4N2O4

3.0

Dinitrobenzene, p-

100-25-4

C6H4N2O4

5.0

Dinonyl phthalate

84-76-4

C26H42O4

1.0

Dioxane 1,2-

C4H8O2

1.5

Dioxane 1,4-

123-91-1

C4H8O2

1.5

Dipentene

138-86-3

C10H16

0.9

Diphenyl ether

101-84-8

C12H10O

0.8

Disulphur dichloride

10025-67-9

S2Cl2

3.0

Di-tert-butyl-p-cresol

2409-55-4

C11H16O

1.0

Divinylbenzene

1321-74-0

C10H10

0.4

Dodecanol

112-53-8

C12H26O

0.9

Epichlorohydrin

106-89-8

C3H5ClO

8.0

Epoxypropyl isopropyl ether,
2,3-

4016-14-2

C6H12O2

1.1

Ethanol

64-17-5

C2H6O

8.7

Ethanolamine

141-43-5

C2H7NO

3.0

Ethoxy-2-propanol, 1-

1569-02-4

C5H10O2

2.0

Ethoxyethanol, 2-

110-80-5

C4H10O2

29.8

Ethoxyethyl acetate, 2-

111-15-9

C6H12O3

3.0

Ethyl(S)-(-)-lactate

97-64-3

C5H10O3

3.0

Ethyl acetate

141-78-6

C4H8O2

3.6

Ethyl acrylate

140-88-5

C5H8O2

2.0

Ethyl amine

75-04-7

C2H7N

1.0

Ethyl benzene

100-41-4

C8H10

0.5

12 Chapter 3

Gas/VOC

CAS No.

Formula

Response Factor

Ethyl butyrate

105-54-4

C6H12O2

1.0

Ethyl chloroformate

541-41-3

C3H5O2Cl

80.0

Ethyl cyanoacrylate

7085-85-0

C6H7O2N

1.5

Ethyl decanoate

110-38-3

C12H24O2

1.8

Ethyl formate

109-94-4

C3H6O2

30.0

Ethyl hexanoate

123-66-0

C8H16O2

2.6

Ethyl hexanol, 2-

105-76-7

C8H18O

1.5

Ethyl hexyl acrylate, 2-

103-11-7

C11H20O2

1.0

Ethyl mercaptan

75-08-1

C2H6S

0.7

Ethyl octanoate

106-32-1

C10H20O2

2.3

Ethylene

74-85-1

C2H4

8.0

Ethylene glycol

107-21-1

C2H6O2

20.0

Ethylene oxide

75-21-8

C2H4O

15.0

Ferrocene

102-54-5

C10H10Fe

0.8

Formamide

75-12-7

CH3ON

2.0

Furfural

98-01-1

C5H4O2

1.4

Furfuryl alcohol

98-00-0

C5H6O2

2.0

Gasoline vapors

8006-61-9 1.1

Gasoline vapors92 octane

8006-61-9 0.8

Germane

7782-65-2

GeH4

10.0

Glutaraldehyde

111-30-8

C5H8O2

0.9

Heptan-2-one

110-43-0

C7H14O

0.7

Heptan-3-one

106-35-4

C7H14O

0.8

Heptane n-

142-82-5

C7H16

2.1

Hexamethyldisilazane,
1,1,1,3,3,3-

999-97-3

C6H19NSi2

1.0

Hexamethyldisiloxane

107-46-0

C6H18OSi2

0.3

Hexan-2-one

591-78-6

C6H12O

0.8

Hexane n-

110-54-3

C6H14

4.2

Hexene, 1-

592-41-6

C6H12

0.9

Hydrazine

302-01-2

H4N2

3.0

Hydrogen peroxide

7722-84-1

H2O2

4.0

Hydrogen sulfide

7783-06-4

H2S

4.0

Hydroquinone

123-31-9

C6H6O2

0.8

Hydroxypropyl acrylate 2-

999-61-1

C6H10O3

1.5

Iminodi(ethylamine) 2,2-

111-40-0

C4H13N3

0.9

Iminodiethanol 2,2'-

111-42-2

C4H11NO2

1.6

Indene

95-13-6

C9H8

0.5

Iodine

7553-56-2

I2

0.2

Iodoform

75-47-8

CHI3

1.5

Iodomethane

74-88-4

CH3I

0.4

Isoamyl acetate

123-92-2

C7H14O2

1.6

Isobutane

75-28-5

C4H10

8.0

Isobutanol

78-83-1

C4H10O

3.5

Isobutyl acetate

110-19-0

C6H12O2

2.3

Isobutyl acrylate

106-63-8

C7H12O2

1.3

Response Factors 13

Gas/VOC

CAS No.

Formula

Response Factor

Isobutylene

115-11-7

C4H8

1.0

Isobutyraldehyde

78-84-2

C4H8O

1.2

Isodecanol

25339-17-7

C10H22O

0.9

Isononanol

2452-97-9

C9H20O

1.5

Isooctane

565-75-3

C8H18

1.1

Isooctanol

26952-21-6

C8H18O

1.7

Isopentane

78-78-4

C5H12

6.0

Isophorone

78-59-1

C9H14O

0.8

Isoprene

78-79-5

C5H8

0.7

Isopropanol

67-63-0

C3H8O

4.4

Isopropyl acetate

108-21-4

C5H10O2

2.2

Isopropyl chloroformate

108-23-6

C4H7O2Cl

1.6

Jet Fuel JP-4

0.8

Jet Fuel JP-5

0.7

Jet Fuel JP-8

0.7

Ketene

463-51-4

C2H2O

3.0

Maleic anhydride

108-31-6

C4H2O3

2.0

Mercaptoacetic acid

68-11-1

C2H4O2S

1.0

Mesitylene

108-67-8

C9H12

0.3

Methacrylic acid

79-41-4

C4H6O2

2.3

Methacrylonitrile

126-98-7

C4H5N

5.0

Methanol

67-56-1

CH4O

200.0

Methoxyethanol, 2-

109-86-4

C3H8O2

2.7

Methoxyethoxyethanol, 2-

111-77-3

C5H12O3

1.4

Methoxymethylethoxy-2­propanol

34590-94-8

C7H16O3

1.3

Methoxypropan-2-ol

107-98-2

C4H10O2

3.0

Methoxypropyl acetate

108-65-6

C6H12O3

1.2

Methyl acetate

79-20-9

C3H6O2

5.2

Methyl acrylate

96-33-3

C4H6O2

3.4

Methyl bromide

74-83-9

CH3Br

1.9

Methyl cyanoacrylate

137-05-3

C5H5O2N

5.0

Methyl ethyl ketone

78-93-3

C4H8O

0.8

Methyl ethyl ketone
peroxides

1338-23-4

C8H18O2

0.8

Methyl isobutyl ketone

108-10-1

C6H12O

0.8

Methyl isothiocyanate

556-61-6

C2H3NS

0.6

Methyl mercaptan

74-93-1

CH4S

0.7

Methyl methacrylate

80-62-6

C5H8O2

1.6

Methyl propyl ketone

107-87-9

C5H10O

0.8

Methyl salicylate

119-36-8

C8H8O3

1.2

Methyl sulphide

75-18-3

C2H6S

0.5

Methyl t-butyl ether

1634-04-4

C5H12O

0.8

Methyl-2-propen-1-ol, 2-

51-42-8

C4H8O

1.1

Methyl-2-pyrrolidinone, N-

872-50-4

C5H9NO

0.9

Methyl-4,6-dinitrophenol, 2-

534-52-1

C7H6N2O5

3.0

14 Chapter 3

Gas/VOC

CAS No.

Formula

Response Factor

Methyl-5-hepten-2-one, 6-

110-93-0

C8H14O

0.8

Methylamine

74-89-5

CH5N

1.4

Methylbutan-1-ol, 3-

123-51-3

C5H12O

3.4

Methylcyclohexane

108-87-2

C7H14

1.1

Methylcyclohexanol, 4-

589-91-3

C7H14O

2.4

Methylcyclohexanone 2-

583-60-8

C7H12O

1.0

Methylheptan-3-one, 5-

541-85-5

C8H16O

0.8

Methylhexan-2-one, 5-

110-12-3

C7H14O

0.8

Methylhydrazine

60-34-4

CH6N2

1.3

Methyl-N-2,4,6­tetranitroaniline, N-

479-45-8

C7H5N5O8

3.0

Methylpent-3-en-2-one, 4-

141-79-7

C6H10O

0.7

Methylpentan-2-ol, 4-

108-11-2

C6H14O

2.8

Methylpentane-2,4-diol, 2-

107-41-5

C6H14O2

4.0

Methylpropan-2-ol, 2-

75-65-0

C4H10O

3.5

Methylstyrene

25013-15-4

C9H10

0.5

Mineral oil

8042-47-5 0.8

Mineral spirits

64475-85-0 0.8

Naphthalene

91-20-3

C10H8

0.4

Nitric oxide

10102-43-9

NO

8.0

Nitroaniline 4-

100-01-6

C6H6N2O2

0.8

Nitrobenzene

98-95-3

C6H5NO2

1.7

Nitrogen dioxide

10102-44-0

NO2

10.0

Nitrogen trichloride

10025-85-1

NCl3

1.0

Nonane, n-

111-84-2

C9H20

1.3

Norbornadiene, 2,5-

121-46-0

C7H8

0.6

Octachloronaphthalene

2234-13-1

C10Cl8

1.0

Octane, n-

111-65-9

C8H18

1.6

Octene, 1-

111-66-0

C8H16

0.7

Oxydiethanol 2,2-

111-46-6

C4H10O3

4.0

Paraffin wax, fume

8002-74-2 1.0

Paraffins, normal

64771-72-8 1.0

Pentacarbonyl iron

13463-40-6

FeC5O5

1.0

Pentan-2-one

107-87-9

C5H10O

0.8

Pentan-3-one

96-22-0

C5H10O

0.8

Pentandione, 2,4-

123-54-6

C5H8O2

0.8

Pentane, n-

109-66-0

C5H12

7.9

Peracetic acid

79-21-0

C2H4O3

2.0

Petroleum ether

64742-82-1

C6H14

0.9

Phenol

108-95-2

C6H6O

1.2

Phenyl propene, 2-

98-83-9

C9H10

0.4

Phenyl-2,3-epoxypropyl
ether

122-60-1

C9H10O2

0.8

Phenylenediamine, p-

106-50-3

C6H8N2

0.6

Phosphine

7803-51-2

PH3

2.0

Picoline, 3-

108-99-6

C6H7N

0.9

Response Factors 15

Gas/VOC

CAS No.

Formula

Response Factor

Pinene, alpha

80-56-8

C10H16

0.3

Pinene, beta

127-91-3

C10H16

0.3

Piperidine

110-89-4

C5H11N

0.9

Piperylene

504-60-9

C5H8

0.7

Prop-2-yn-1-ol

107-19-7

C3H4O

1.3

Propan-1-ol

71-23-8

C3H8O

4.8

Propane-1,2-diol, total

57-55-6

C3H8O2

10.0

Propene

115-07-1

C3H6

1.4

Propionaldehyde

123-38-6

C3H6O

1.7

Propionic acid

79-09-4

C3H6O2

8.0

Propyl acetate, n-

109-60-4

C5H10O2

2.5

Propylene oxide

75-56-9

C3H6O

7.0

Propyleneimine

75-55-8

C3H7N

1.3

Pyridine

110-86-1

C5H5N

0.8

Pyridylamine 2-

504-29-0

C5H6N2

0.8

Styrene

100-42-5

C8H8

0.4

Terphenyls

C18H14

0.6

Terpinolene

586-62-9

C10H16

0.5

Tert-butanol

75-65-0

C4H10O

2.6

Tetrabromoethane, 1,1,2,2-

79-27-6

C2H2Br4

2.0

Tetracarbonylnickel

13463-39-3

NiC4O4

1.0

Tetrachloroethylene

127-18-4

C2Cl4

0.7

Tetrachloronaphthalenes,all
isomers

20020-02-4

C10H4Cl4

1.0

Tetraethyl orthosilicate

78-10-4

C8H20O4Si

2.0

Tetrafluoroethylene

116-14-3

C2F4

1.0

Tetrahydrofuran

109-99-9

C4H8O

1.6

Tetramethyl succinonitrile

3333-52-6

C8H12N2

1.0

Therminol

1.0

Toluene

108-88-3

C7H8

0.5

Toluene-2,4-diisocyanate

584-84-9

C9H6N2O2

1.6

Toluenesulphonylchloride, p-

98-59-9

C7H7SO2C
l

3.0

Toluidine, o-

95-53-4

C7H9N

0.5

Tributyl phosphate

126-73-8

C12H27O4
P

5.0

Tributylamine

102-82-9

C12H27N

1.0

Trichlorobenzene 1,2,4-

120-82-1

C6H3Cl3

0.6

Trichloroethylene

79-01-6

C2HCl3

0.7

Trichlorophenoxyacetic acid,
2,4,5-

93-76-5

C8H5O3Cl3

1.0

Triethylamine

121-44-8

C6H15N

0.9

Trimethylamine

53-50-3

C3H9N

0.5

Trimethylbenzene, 1,3,5-

108-67-8

C9H12

0.3

Turpentine

8006-64-2

C10H16

0.6

TVOC

1.0

16 Chapter 3

Gas/VOC

CAS No.

Formula

Response Factor

Undecane, n-

1120-21-4

C11H24

0.9

Vinyl acetate

108-05-2

C4H6O2

1.1

Vinyl bromide

593-60-2

C2H3Br

1.0

Vinyl chloride

75-01-4

C2H3Cl

2.1

Vinyl-2-pyrrolidinone, 1-

88-12-0

C6H9NO

0.9

Xylene mixed isomers

1330-20-7

C8H10

0.4

Xylene, m-

108-38-3

C8H10

0.4

Xylene, o-

95-47-6

C8H10

0.6

Xylene, p-

106-42-3

C8H10

0.6

Xylidine, all

1300-73-8

C8H11N

0.7

Response Factors 17

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18 Chapter 3

Chapter 4

Field Testing and Calibration

Overview

Due to the nature of the PID sensor and the presence of VOCs in air
along with other environmental factors such as altitude, temperature
and relative humidity, the zero value of the VOC probe will shift over
time. TSI recommends testing the probe performance each time
the instrument is used to make measurements. This is a common
practice within the gas measurement community which includes IAQ
consultants and industrial hygienists.

Probe Verification

Verifying the probe performance
can easily be accomplished in
the field by comparing it to
certified zero and span
calibration gases. To do this,
attach the probe with the
calibration collar to a bottle of
Zero Gas and compare to the
instrument readings (also

referred to as a “Bump Test”). If

the probe reads any number
other than 0, the PID sensor has
drifted and needs to be
re-calibrated.

NOTE: With probe attached, power on the instrument for 10 minutes
before verifying performance. This allows the instrument and probe
electronics to stabilize to produce best results.

19

TSI Recommended Accessories for Testing or Calibrating PID Probes

 Zero Gas—80% Nitrogen/20% Oxygen
 Span Gas—1 ppm Isobutylene in balance Nitrogen—use with

ppb probe

 Span Gas—10 ppm Isobutylene in balance Nitrogen—use with

ppb probe

 Span Gas—20 ppm Isobutylene in balance Nitrogen—use with

ppm probe

 Span Gas—100 ppm Isobutylene in balance Nitrogen—use with

ppm probe

 0.3 to 0.5 L/min flow rate Continuous Flow Regulator
 Tygon® tubing 0.250 in. (6.35 mm) OD, 0.125 in. (3.175 mm) ID
 VOC probe calibration collar (included with probe)

When spanning with an isobutylene gas, select a concentration value
that is closest to the desired measurement range. This will result in
maximum accuracy of the PID sensors readings.

Example 1 (ppb)

If you have a ppb PID probe and want to measure VOCs in the low
ppb range, span calibrating with a 1 ppm isobutylene gas will give
more accurate results than span calibrating with a 10 ppm
isobutylene gas. If you would like to measure VOCs in the mid to
upper range of the PID sensor, calibrating with 10 ppm isobutylene
span gas would be appropriate.

Example 2 (ppm)

If you have a ppm PID probe and want to measure VOCs in the low
ppm range, span calibration with a 20 ppm isobutylene gas will give
more accurate results, than span calibrating with 100 ppm
isobutylene gas will. If you would like to measure VOCs in the mid to
upper range of the PID sensor, calibrating with 100 ppm isobutylene
span gas would be appropriate.

Zero, Span gasses and regulators that meet TSI’s requirements are

available internationally from PortaGas at www.portagas.com in 103
liter bottle configurations.

20 Chapter 4

PID Probe Calibration

NOTES

 With probe attached power on the instrument for 10 minutes

before calibrating the probe. This allows the instrument and
probe electronics to stabilize to produce best results.

 Field calibration is required if a new replacement PID sensor is

installed on the probe.

 Restore to Factory Calibration before performing field

calibration.

 After restoring Factory Calibration, try the “Bump Test” again at

0 ppm and/or at a known concentration of Isobutylene in balance
Nitrogen gas. If readings are still out of tolerance, then proceed
with field calibration procedure.

MENU
Zero Press
Display Setup
Settings
Flow Setup

VOC Setup

Actual/Std Setup
Data Logging

Zero CO

Applications

Calibration

Bluetooth Functions

CALIBRATION
Calibrate Temp
Calibrate Vel
Calibrate %RH
Calibrate B.P.
Calibrate CO2
Calibrate CO
Calibrate VOC
Restore Factory Cal

If the probe reads any number other than 0 when tested against a
zero gas, the PID sensor has drifted and needs to be re-calibrated
using the following instructions. These instructions are also applicable
if the PID sensor has been replaced in the field.

Accessing the Calibration Menu

To access the CALIBRATION menu, press the MENU key and scroll
down to CALIBRATION and press ENTER. Highlight Calibrate VOC
and then press ENTER.

Field Testing and Calibration 21

NOTE

The measurement capabilities of the instrument and probe will
determine what appears in the main MENU and CALIBRATION
menu. Instrument models using detachable probes must have the
probe attached to perform field calibrations. This screen display
above is from the 9565-P VelociCalc® Multi-Function Ventilation
Meter with VOC probe attached.

Calibrate VOC

Step 3—Zero Calibration.

After pressing ENTER with the zero
calibration gas connected, the instrument
begins to take data. A bar graph will
appear showing the time remaining. The

time allocated by the instruments
firmware for zero is sufficient for zeroing.

CALIBRATE VOC
Connect zero gas

then press

ENTER

CALIBRATE VOC

0.00 ppm

A probe calibration collar (included with probe), zero calibration gas,
span calibration gas, gas regulator and tubing are required to perform
the calibration. The gas regulator used to control the flow should be
capable of providing 0.3 L/min. Follow the on-screen instructions to
complete the calibration.

Step 1—Grasp probe handle and pull PID sensor protective cap off.

Step 2—Slide calibration collar onto probe and attach to gas cylinder

using tubing.

22 Chapter 4

Step 4—Span Calibration.
For best results, run the span gas with

the probe attached for 60 seconds before
pressing the ENTER button to conduct
the span calibration.

After pressing ENTER with the span
calibration gas connected, the instrument
begins to take data. A bar graph will
appear showing the time remaining.

CALIBRATE VOC
Connect span gas

then press

ENTER

CALIBRATE VOC

9.41 ppm

Step 5—Span Adjustment
Once the countdown is complete, the

VOC concentration as measured by the
probe is displayed along with the percent
of adjustment.

In this example, the span gas is rated at
10 ppm. Use the UP or DOWN arrow
keys to adjust offset to match the span
gas concentration. Press ENTER to
accept and to return to the
CALIBRATION menu.

CALIBRATE VOC

9.41 ppm

0.0 % Adjustment

CALIBRATE VOC

10.00 ppm

6.3 % Adjustment

Calibrate CO2

This calibration option applies to meters and probes capable of
measuring CO2. A probe calibration collar, zero calibration gas, span
calibration gas, gas regulator and tubing are required to perform the
calibration. The gas regulator used to control the flow should be
capable of providing 0.3 L/min. Follow the on-screen instructions to
complete the calibration.

Requirements

 Probe calibration collar (included

with IAQ and VOC probes)

 Span calibration gas, 5000 ppm

maximum

 Zero Gas – 80% Nitrogen /

20% Oxygen

 0.3 L/min flow rate Continuous

Flow Regulator

 Tygon tubing 0.250 in. (6.35 mm) OD, 0.125 in. (3.175 mm) ID

Field Testing and Calibration 23

NOTE

If probe measures VOC gasses, remove VOC sensor first.









Step 2— Bump Test

Measure concentration with 0 ppm calibration gas flowing through the
calibration collar. Do the same with the Span Gas. If readings are out
of tolerance, Restore CO2 Factory Calibration (see RESTORE

FACTORY CAL) and then perform the Bump Test again at 0 ppm and

Span. If readings are still OOT, proceed with Field Calibration.

Step 3—Zero Calibration.
After pressing ENTER with the zero

calibration gas connected, the instrument
will begin to take data. A bar graph will
appear showing the time remaining.

Step 4—Span Calibration.
After pressing ENTER with the span

calibration gas connected, the instrument
will begin to take data. A bar graph will
appear showing the time remaining.

 Pull PID sensor protective cap off 
 Remove PID sensor 
 Unscrew collar 
 Gently remove small PCB 

Step 1—Slide calibration collar onto probe and attach to gas cylinder
using tubing.

24 Chapter 4

Step 5—Span Adjustment.
Once the countdown is complete, the

CO2 concentration as measured by the
probe is displayed along with the percent
of adjustment.

In this example, the span gas is rated at
1000 ppm. Use the UP or DOWN arrow
keys to adjust offset to match the span
gas concentration. Press ENTER to
accept and to return to the
CALIBRATION menu.

Calibrate Temp

This calibration option applies to all meters and probes capable of
measuring temperature. The temperature calibration can be adjusted
±6.0°F (±3.3°C). Compare the instruments temperature reading to a
reference standard and make changes as required.

Step 1—Use the UP or DOWN arrow keys to adjust offset.
Step 2—Press ENTER to accept and to return to CALIBRATION

menu.

In this example, the temperature measured by the probe is 75.3°F
and the reference temperature is 73.6°F. Adjusting the offset by

-1.7°F allows the probe to match the reference standard.

Field Testing and Calibration 25

Calibrate %RH

RESTORE FACTORY CAL
Restore Temp
Restore Vel
Restore %RH
Restore Press

Restore B.P.

Restore CO2
Restore CO
Restore VOC

RESTORE VOC

Are you Sure?

YES NO

This calibration option applies to meters and probes capable of
measuring relative humidity. Compare the instruments relative
humidity reading to a reference standard and make changes as
required. The Offset can be adjusted ±12.0% RH.

Step 1—Use the UP or DOWN arrow keys to adjust offset.
Step 2—Press ENTER to accept and to return to CALIBRATION

menu.
In this example, the relative humidity measured by the probe is

30.5 %RH and the reference humidity is 31.6 %RH. Adjusting the
offset by 1.1% allows the probe match the reference standard.

RESTORE FACTORY CAL

This option resets the field calibration for any measurement
parameter back to the last factory calibration. To restore the last
factory calibration for any measurement parameter, the probe must
be attached to the meter on models with detachable probe.

26 Chapter 4

Condition

Recommended Action

Sensitivity has dropped too much (note the
change required when checking calibration)

Clean lamp
The baseline is climbing after you zero the PID

Replace electrode stack

The PID becomes sensitive to humidity

Replace electrode stack

The baseline is unstable or shifts when the PID
is moved

Replace electrode stack

Chapter 5

Probe Maintenance

The electronics in the PID sensor in the VOC probes are not
accessible. However, periodic sensor maintenance of the electrode
stack and lamp may be needed for optimal performance.

The PID lamp will need cleaning from time to time. How often
depends on the environment you are measuring in. If you are
measuring indoor air quality where the VOC concentrations are low
and there are few particulates, then a monthly or even less frequent
cleaning may be adequate. However, if you are measuring high VOC
concentrations and particulates are present in high concentrations,
check calibration frequently and clean the lamp. When the PID has
lost sensitivity, change the stack as explained below in the sections

entitled “Removing Electrode Stack and Lamp” and “Refitting

Electrode Stack and Lamp”.

The PID needs maintenance if:

Removing the Electrode Stack and Lamp

CAUTION: Always use the Electrode Stack Removal Tool (included

with replacement stack); any other tools may damage your PID and
void the warranty.

1. Remove cap and PID sensor from VOC probe, as shown in
Figure 1.

2. Gently pull the sensor from the probe.

3. Place the PID, top side down, onto a clean surface.

4. Insert electrode stack removal tool into the two slots on the sides
of the PID (as shown in Figure 2) and squeeze together until
electrode stack and lamp are released.

27

CAUTION: Electrode stack and lamp may jump off sensor and
become lost if removed when the PID is right-side up.

5. Carefully lift the PID body away from the electrode stack and
lamp.

Figure 1. Removing Cap and PID Sensor from VOC Probe

NOTES:

 If the lamp lodges in the sensor, use tweezers to carefully

remove it.

 If the spring behind the lamp also comes out, replace it in the

sensor housing.

Figure 2. Using Electrode Stack Removal Tool

28 Chapter 5

Cleaning the PID Lamp

Cleaning the PID lamp is recommended as a first step for PIDs
needing service. Use the procedure described below. Recalibrate the
sensor after cleaning the lamp.

To check for a lamp that needs cleaning, hold it in front of a light
source and look across the window surface as shown in Figure 3. A
dirty lamp will have a “blue hue” on the detection window.

Figure 3. Checking Lamp for Contamination

Only clean the lamp using the lamp cleaning kit (P/N 801782) while
following the instructions below. To avoid contaminating the sensor
and affecting accuracy, do not touch the lamp window with bare
fingers. You may touch the body of the lamp with clean fingers.

1. Remove Electrode Stack and Lamp from sensor and probe.

2. Open the container of alumina polishing compound. With a clean
cotton swab, collect a small amount of the powder.

3. Use this cotton swab to polish the PID lamp window. Use a
circular action, applying light pressure to clean the lamp window,
as shown in Figure 4. Do not touch the lamp window with fingers.

4. Continue polishing until an audible “squeaking” is made by the
cotton swab moving over the window surface. Squeaking usually
occurs within 15 seconds.

Probe Maintenance 29

Remove the residual powder from the
lamp window with a clean cotton swab.
Care must be taken not to touch the
tips of cotton swab that are to be used
to clean the lamps as this may
contaminate them with finger oil.

Ensure the lamp is completely dry and
any visible signs of contamination are
removed before replacing.

Figure 4. Cleaning Lamp
Window

PID Lamp Cleaning Kit P/N 801782

The vial of cleaning compound contains alumina (CAS Number
1344-28-1) as a very fine powder. Key safety issues are identified
below.

Hazard identification:

May cause irritation of respiratory tract and eyes.

Storage:

Keep container closed to prevent water adsorption and
contamination.

Handling:

• Do not breathe in the powder. Avoid contact with skin, eyes and
clothing.

• Wear suitable protective clothing.

• Follow industrial hygiene practices: Wash face and hands

thoroughly with soap and water after use and before eating,
drinking, smoking or applying cosmetics.

• The powder carries a TVL (TWA) limit of 10 mg/m3.

Replacing the Lamp

A PID lamp will last a long time, typically a few thousand hours.
However, the sensitivity of the PID sensor is approximately
proportional to the lamp light intensity. As the bulb ages and loses
intensity, the response to a gas concentration decreases and may
become noisier. If cleaning the window does not restore sensitivity,
replace the lamp. Recalibrate the sensor after replacing the lamp.

30 Chapter 5

Replacing the Electrode Stack

1. Place the lamp inside the
O-ring seal in the electrode
stack as shown in Figure 5.
Twisting the lamp slightly
during insertion will help to
ensure the lamp window is

snug against the pellet’s

front electrode. The lamp
should be freely supported
by the O-ring.

Figure 5. Inserting Lamp into
Electrode Stack

While the PID electrode stack can last the lifetime of the PID if used
in clean environments, it may only last a month if used in heavily
contaminated sites. Therefore, TSI recommends having a
replacement electrode stack if you are working in dirty environments.

Replace the electrode stack if the sensor shows signs of
contamination after the lamp window has been cleaned or is known to
have been subjected to severe contamination. Recalibrate the sensor
after replacing the electrode stack.

Discarding the Electrode Stack

Discard the contaminated electrode stack. The electrode stack does
not have any toxic components unless contaminated in the field by
toxic materials.

Refitting Electrode Stack and Lamp

WARNING: Do not refit a damaged lamp.

2. Continuing to hold the electrode stack between forefinger and
thumb, carefully insert the lamp into recess in the sensor
ensuring that the lamp remains in position. Press the electrode
firmly, to ensure that the wing clips are engaged, and the top
faces of the electrode stack and sensor housing are flush.

3. Refit the sensor into the VOC probe and replace the sensor
cover.

4. Re-calibrate the gas detector.

Probe Maintenance 31

Spare Components

800706

10 ppm Cal Gas (for ppb probe)

800707

100 ppm Cal Gas (for ppm probe)

801780

Replacement Lamp

801781

Replacement Electrode Stack (for ppm Sensor) and Tool

801786

Replacement Electrode Stack (for ppb Sensor) and Tool

801782

Lamp Cleaning Kit with Spring

801783

Replacement ppm sensor

801784

Replacement ppb sensor

U.S.

International

TSI Incorporated

TSI GmbH

500 Cardigan Road

Neuköllner Strasse 4

Shoreview MN 55126-3996

52068 Aachen GERMANY

Tel: [phone] (USA)

Tel: [phone]

[phone]

Fax: [phone]

Fax: [phone]

E-mail: [e-mail]

E-mail: [e-mail]

Web: www.tsiinc.de

Web: www.tsi.com

TSI Instruments Ltd.

Stirling Road

Cressex Business Park

High Wycombe, Bucks

HP12 3ST UNITED KINGDOM

Tel: [phone]

Fax: [phone]

E-mail: [e-mail]

Web: www.tsiinc.co.uk

If you need spare components, then order the necessary parts listed
below:

Recalibration

To maintain a high degree of accuracy in your measurements, TSI
recommends that you return your VOC probe to TSI for annual

recalibration. Please contact one of TSI’s offices or your local

distributor to make service arrangements and to receive a Return
Material Authorization (RMA) number. To fill out an online RMA form,

visit TSI’s website at http://service.tsi.com.

32 Chapter 5

Symptom

Possible Causes

Corrective Action

No Display

Unit not turned on

Switch unit on.

Low or dead batteries

Replace batteries or plug
in AC adapter.

Dirty battery contacts

Clean the battery
contacts.

No measurements
shown on display

DISPLAY SETUP
measurement parameters
set to OFF

Set measurement
parameters to ON.

No response to
keypad

Keypad locked out

Unlock keypad by
pressing  keys
simultaneously.

Instrument Error
message appears

Memory is full

Download data if desired,
then DELETE ALL memory.

Fault in instrument

Factory service required
on instrument.

Probe Error
message appears

Fault in probe

Factory service required
on probe.

Probe is plugged in,
but the instrument
does not recognize
it

Probe was plugged in
when the instrument was
ON

Turn instrument OFF and
then turn it back ON.

Chapter 6

Troubleshooting

Table 6-1 lists the symptoms, possible causes, and recommended
solutions for common problems encountered with the instrumentation.
If your symptom is not listed, or if none of the solutions solves your
problem, please contact TSI.

Table 6-1: Troubleshooting instrument and VOC probes

Remove the probe from excessive temperature immediately:
excessive heat can damage the sensor. Operating temperature limits
can be found in Appendix A, Specifications.

W A R N I N G !

33

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34 Chapter 6

Appendix A

Specifications

Specifications are subject to change without notice.

Model 984 Low Concentration (ppb) VOC and Temperature

Range 10 to 20,000 ppb,

14 to 140°F (-10 to 60°C)
Accuracy ±1.0°F (±0.5°C)1
Resolution Up to 10 ppb, 0.1°F (0.1°C)

Model 985 High Concentration (ppm) VOC and Temperature

Range 1 to 2,000 ppm,

14 to 140°F (-10 to 60°C)
Accuracy ±1.0°F (±0.5°C)
Resolution Up to 10 ppm, 0.1°F (0.1°C)

Model 986 Low Concentration (ppb) VOC, Temperature, CO2, and
Humidity

Range 10 to 20,000 ppb VOC, 0 to 5,000 ppm CO2

14 to 140°F (-10 to 60°C), 5 to 95% RH
Accuracy ±3% of reading or 50 ppm CO22, whichever is greater

±1.0°F (±0.5°C)1, ±3% RH3
Resolution Up to 10 ppb VOC, 0.1 ppm CO

0.1°F (0.1°C), 0.1% RH

Model 987 High Concentration (ppm) VOC, Temperature, CO2,
and Humidity

Range 1 to 2,000 ppm VOC, 0 to 5,000 ppm CO2

14 to 140°F (-10 to 60°C), 5 to 95% RH
Accuracy ±3% of reading or 50 ppm CO

±1.0°F (±0.5°C)1, ±3% RH3
Resolution Up to 10 ppm VOC, 0.1 ppm CO2,

0.1°F (0.1°C), 0.1% RH

1

2

,

2

2

, whichever is greater

2

Temperature Range:

Operating (Electronics): 40 to 113°F (5 to 45°C)
Operating (Probe): 14 to 140°F (-10 to 60°C)
Storage: -4 to 140°F (-20 to 60°C)

35

Probe Dimensions

Length 7.0 in. (17.8 cm)
(excluding handle)
Base Diameter 0.75 in. (1.9 cm)

Tip Diameter 1.0 in. (2.54 cm)

Note: The 984 and 986 probes are designed to measure ppb concentrations of VOCs.
The 10 to 20,000 ppb range corresponds to 0.01 to 20 ppm.

1

Accuracy with instrument case at 77°F (25°C), add uncertainty of 0.05°F/°F

(0.05°C/°C) for change in instrument temperature.

2

Accuracy with probe at 77°F (25°C). Add uncertainty of ±0.2%/°F (±0.36%/°C) away

from calibrated temperature

3

Accuracy with probe at 77°F (25°C). Add uncertainty of 0.1% RH/°F (0.2% RH/°C) for

change in probe temperature. Includes 1% hysteresis.

TSI, the TSI logo and VelociCalc are registered trademarks of TSI Incorporated.

36 Appendix A

USA Tel: [phone]
UK Tel: [phone]
France Tel: [phone]
Germany Tel: [phone]

India Tel: [phone]
China Tel: [phone]
Singapore Tel: [phone]

TSI Incorporated – Visit our website www.tsi.com for more information.

P/N 6007661 Rev. A ©2014 TSI Incorporated Printed in U.S.A.