BRUEL & KJAER 1213 User manual

InstructionManual
Indoor Climate Analyzer Type 1213
On
Off
..
$Wei& K}ller
Indoor {;limate Analyzer
Type 1213
A precision instrument for measuring the indi-
vidual physical parameters which influence
the indoor climate and affect a person's com-
fort. It measures air temperature, air velocity,
surface temperature, radiant temperature and
humidity.
In addition to these measurement
capabilities, the Type 1213 can store up to 60
measurements of each parameter in a non-
volatile memory. The measurement period
can be set from 1 to 120 hours. Results can be
presented digitallyon the brightalphanumeric
display,
or graphically via a level recorder or
X - Y recorder.
+ Brliel &Kja!r

1213
+ Briiel & Kjaer DK-2aso NIEAUM, DENMARK . Telephone: +45 2 soo5oo · Tele" 37316 bruka dk
Pri nt ed in Den ma rk by N rerum Off set
English DK BE 0865-12
InstructionManual
Indoor Climate Analyzer Type 1213
On
Off
•
Briiel&K J,flllr
In door Climate Al'la lyzer
Type 1213
A precision instrument for measuring the indi-
vidual physical parameters which Influence
the indoor climate and affect a person's com-
fort. It measures air temperature, air velocity,
surface temperature, radiant temperature and
humidity.
In addition to these measurement
capabilities, the Type 1213 can store up to 60
measurements of each parameter in a non-
volatile memory. The measurement period
can be set from 1to 120 hours. Results can be
presented digitallyon the brightalphanumeric
display,
or graphically via a level recorder or
X - Y recorder.
+ Briiel & Kjaer

INDOOR CLIMATE ANALYZER
TYPE 1213
From serial no. 1167965
Revision January 1990

SAFETY CONSIDERATIONS
This apparatus has been designed and tested according to IEC Publication 348, Safety
Requirements
for Electronic Measuring Apparatus, and has been supplied in safe condi-
tion. The present Instruction Manual contains information and warnings which should be
followed by the user to ensure safe operation and to retain the apparatus in safe condi-
tion. Special note should be made
of the following:
SAFETY SYMBOLS
6 The apparatus will be marked with this symbol when it is important that the user
refer
to the associated warning statements given in the Instruction Manual.
.L Chassis terminal ! Safety earth terminal
,r' Hazardous voltage.
WARNINGS
Set all instruments to power off before connecting or disconnecting interface cables.
Whenever it is likely that the correct function or operating safety of the apparatus has
been impaired, the apparatus must be made inoperative and be secured against unin-
tended operation.
Any adjustment, maintenance and repair
of the open apparatus under voltage must be
avoided as far as possible and,
if unavoidable, must be carried out only by trained
service personnel.

CONTENTS
1. INTRODUCTION AND SPECIFICATIONS (PRODUCT DATA) ................................................................................1
2. CONTROLS.....................................................................................................................................................................9
2.1. FRONT PANEL...................................................................................................................... 9
Power Switch......................................................................................................................... 9
Transducer Selection ........................................................................................................ 10
Mode Controls .................................................................................................................... 11
Recording Time Controls ................................................................................................. 12
Display ................................................................................................................................. 13
2.2. REAR PANEL ...................................................................................................................... 13
3. OPERATION ................................................................................................................................................................. 16
3.1. PRELIMINARY..................................................................................................................... 16
Environment and Handling............................................................................................... 16
Mounting .............................................................................................................................. 16
3.2. POWER SUPPLY................................................................................................................. 17
Batteries ............................................................................................................................... 17
Installation of Batteries ..................................................................................................... 17
Battery Charger ZG 0283.................................................................................................. 19
Mains Power
Supply ZG 0199.......................................................................................... 19
External DC.............................................................................................. .... ....................... 20
3.3. CALIBRATION OF THE INDOOR CLIMATE ANALYZER AND TRANSDUCERS...... 21
3.4. OPERATION OF THE INDOOR CLIMATE ANALYZER................................................. 21
Setting up the Transducers ............................................................................................. 21
The Self- Test Routine....................................................................................................... 23
Selection of Measurement Units..................................................................................... 23
3.5. OPERATING MODES......................................................................................................... 24
Display .................................................................................................................................24
Record.................................................................................................................................. 26
Replay /Plot ..........................................................................................................................29
4. MEASUREMENTS USING THE INDOOR CLIMATE ANALYZER ........................................................................30
4.1. INTRODUCTION.................................................................................................................. 30
4.2. AIR TEMPERATURE MEASUREMENTS......................................................................... 30
Use of the Air Temperature Transducer ........................................................................ 30
Vertical
Air Temperature Difference Measurements................................................... 30
4.3. SURFACE TEMPERATURE MEASUREMENTS.............................................................. 32
Use
of the Surface Temperature Transducer ............................................................... 32

4.4. AIR VELOCITY MEASUREMENTS.................................................................................. 33
Use
of the Air Velocity Transducer................................................................................ 33
Influence of Air Pressure.................................................................................................. 35
4.5. HUMIDITY MEASUREMENTS .......................................................................................... 36
Definition
of Humidity Terms........................................................................................... 36
Use
of the Humidity Transducer..................................................................................... 36
Accuracy
of Humidity Measurements............................................................................ 37
4.6. RADIANT TEMPERATURE MEASUREMENTS ..............................................................
38
Definition of Radiant Temperature Terms..................................................................... 39
Use
of the Radiant Temperature Asymmetry Transducer........................................ .. 39
Range of Radiant Temperature Measurements............................................................ 40
Calculation of Mean Radiant Temperature ................................................................... 40
5. USE OF ANALYZER WITH OTHER BRUEL& KJJER INSTRUMENTS................................................................ 42
5.1. LEVEL RECORDER TYPE 2317....................................................................................... 42
Connection.......................................................................................................................... 42
Calibration........................................................................................................................... 43
Real- Time Recordings Using Type 2317....................................................................... 44
Replaying Data from the Memory ................................................................................... 45
5.2. X- Y RECORDER TYPE 2308............................................................................................ 45
Connection..........................................................................................................................46
Calibration........................................................................................................................... 47
Replaying Data from the Memory ................................................................................... 48
Instantaneous Air Velocity Recordings.......................................................................... 49
5.3. TYPE 1213/WH 1791 MODIFICATION ............................................................................ 49
Graphics Printer Type 2318/ZI 0054 ............................................................................... 50
Alphanumeric Printer Type 2312..................................................................................... 50
6. SERVICE AND REPAIR...... ... ..................................................................................................................................... 51

USES:
• Measurement of all physical parameters
necessary for the evaluation of indoor thermal
environments
• Measurement of air temperature and velocity,
surface temperature, plane radiant temperature,
radiant temperature asymmetry and humidity
• To establish acceptable working environments in
offices, light industry, hospitals, etc.
• Evaluation of thermal comfort in aircraft, trains,
buses and other transport environments
• Evaluation of complaints concerning indoor
thermal environments
• Assessment of the effectiveness of changes to air
conditioning and ventilation systems inside
buildings and vehicles
• Assessment of the effectiveness of changes to
heating and cooling systems inside buildings
• Research into indoor thermal environments
The Indoor Climate Analyzer Type
1213 is a unique, compact, direct-read-
ing
instrument for measurement of all
the essential physical parameters need-
ed to assess indoor thermal environ-
ments.
It is extremely simple to operate
and may be used in buildings and also
vehicles which have
their own enclosed
thermal environments. Results can ei-
ther be obtained directly from the easy-
to-read
20 character alphanumeric dis-
play,
or stored in the non-volatile mem-
ory for
subsequent display and/or
plotting.
The Type 1213 conforms to the re-
quirements of ISO 7726 "Thermal envi-
ronments -
Instruments and methods
for measuring physical quantities."
Introduction
On
Off
type 1213
Indoor Climate Analyzer
FEATURES:
• Easy operation -Type 1213 tells you what to do
• Self-test routines check correct functioning of
instrument
• Rapid response time for all measurements
• One small portable unit enables measurement of
all important thermal environmental parameters
• No recalibration when transducers are changed
• Data recording of up to 120 h in non-volatile
memory
• Stores 60 measurements of each parameter
throughout pre-selected measurement period
• Large 20 character alphanumeric display
• Linearized analogue outputs
• Digital, parallel, and serial interface (1213/WH 1791)
• Several power options available; internal battery,
mains or DC supply
• Display and output
in either S.l. or Imperial units
On
11\ ... 241\ 120h
lu..ts
B ril ei & Kjaer
Indoor Climate A nalyzer
Type 1213
The measurement of several physi-
cal
parameters is required in order to
adequately describe the indoor ther-
mal climate. Amongst the most impor-
tant of these parameters are air veloci-
ty, air
temperature , humidity and ra-
diant temperature asymmetry. The
Indoor Climate Analyzer Type 1213
and its Transducers measures these
and other parameters.
ducers are connected by cables to the
Type 1213 and four of the Transduc-
ers can be mounted on a light-weight,
photographic-type tripod.
The fifth
Transducer is for measurement of sur-
face
temperature and is hand-held in
contact with the surface(s) under -i n-
vestigation.
BP0424-13
The Type 1213 Analyzer consists of
a portable,
battery or mains powered
instrument which simultaneously
senses
environmental conditions via
five
separate Transducers. The Trans-

A Delta Arm and 4 Tripod Mount-
ing Adaptors are included with the
Type 1213 and five Transducers when
the Indoor Climate Analyzer Measur-
ing Set Type 3532 is ordered (Fig. 1).
A
Tripod can also be supplied as an
optional ·accessory. ···
Measurements obtained using the
Indoor Climate Analyzer can be read
directly from the Display, or stored in
the non-volatile memory and subse-
quently
plotted on an X - Y Recorder
such as B & K
Type 2308. Level Re-
corders,
such as B & K Type 2317, and
the Graphics Printer Type 2318 (if
1213/WH 1791 is ordered) may also be
used.
Description
Air Temperature Transducer
The Air Temperature Transducer
(MM 0034) shown in Fig. 2 is based on
an extremely accurate, platinum
(PtlOO) resistance temperature sensing
element.
This resistor is surrounded by
an open-ended radiation shield, which
reduces
the thermal radiation effects
of the environment. Since platinum
has a well defined temperature coeffi-
cient,
air temperature can be accurate-
ly
measured by a change in resistance.
Surface Temperature
Transducer
The Surface Temperature Trans-
ducer (MM 0035) shown in Fig. 3 is
also
based on a PtlOO resistor at-
tached to a thin diaphragm. The dia-
phragm is simply placed in contact
with the surface whose temperature is
to be measured. The diaphragm is at-
tached to a conical housing which pro-
tects the temperature sensing ele-
ment. Additional protection is also
provided by a
spring loaded attach-
ment between the sensor and the
transducer handle. This spring system
also enables surface temperature mea-
surements to be obtained from sur-
Pt 100 Temperature Sensing Element
Shield Support
/
Thermal Racfiation Shield
Fig. 1 The Indoor Climate Measuring Set Type 3532 and optional Tripod
faces which are not perpendicular to
the transducer handle.
Radiant Temperature
Asymmetry Transducer
The Radiant Temperature Asym-
metry Transducer (MM 0036) consists
of two identical faces (A and B) which
independently measure incident radi-
ation on each plane surface (Fig. 4).
Radiant temperature asymmetry
(~t pr ) is defined as the difference be-
tween the plane radiant temperature
(tpr) on two opposite sides of a small
black element.
The parameter tpr de-
scribes
the heat radiation in one direc-
tion.
It is defined as the uniform sur-
face
temperature of a half room that
produces the same incident radiation
on a black surface as the actual envi-
ronment. In addition to measuring t pr
and ~t p n the MM 0036 also measures
incident power which is the gross
amount of radiation that a black sur-
face receives from
the environment.
The net amount of received radiation
is significantly less than the incident
power because the surface itself radi-
ates as it is above OK (-273°C). By
measuring tpr in several directions the
mean radiant temperature can also be
calculated.
Each face of the Transducer con-
sists
of a reflective gold-plated ele-
ment and a black painted element of
the same size. Both elements are con-
nected to a centreblock via thermo-
piles. When either heated or cooled by
the environment, the gold-plated ele-
ment gains or looses heat entirely by
convection whereas
the black element
looses or gains heat both by convec-
tion
and radiation. Thus, as both ele-
ments have essentially the same tem-
perature, the resultant difference volt-
age
produced across the thermopiles is
a function
of the heat transfer by radi-
ation between the black element and
the environment. The tpr is calculated
from
this measurement and from the
temperature inside the centreblock
which is measured using a PtlOO tem-
perature sensitive resistor.
Humidity Transducer
The Humidity Transducer
(MM 0037) is a dew-point transducer
(Fig. 5). When a humidity measure-
ment is selected, a cooling element be-
low a conical
mirror in the Transducer
840793
Fig. 2 Air Temperature Transducer (MM 0034)
2

Pt 100 Temperature Sensing Element
connected to diaphragm
Diaphragm
Fig. 3 Surface Temperature Transducer (MM 0035)
PT 100 Temperature Sensing Element
Polyethylene shield
Thermopiles
Fig. 4 Radiant Temperature As y mmetry Transducer (MM 0036)
Light Emitting Diode Conical
Mirror
Cooling Element
Pt 100 Temperature Sensing Element
Light Sensitive Transistor
Fig. 5 Hum idity Tran sducer (MM 0037)
Three heated coils. For improved
frequency response, temperature and
heat loss is only measured on the
centre coil
Solid
plastic sphere provides protection
and correction for directional sensitivity
Fig. 6 Air Velocity Transducer (MM 0038)
Unheated coil of nickel wire
Plastic foam elipsoids coated with
· white enamel paint
Shaft containing circuit board with
preamplifier
\
Shaft containing circuit board with
measuring
bridge
!
840791
840789
840790 11
.840792
3

is activated, reducing the mirror tem-
perature until condensation of atmo-
spheric water vapour occurs. The tem-
perature at which this water vapour
condenses on the mirror surface is
known as
the dew-point.
Above
the mirror there is a Light
Emitting Diode (LED) and a light
sensitive transistor (receiver). These
are arranged so that light from the
LED is not normally detected by the
receiver. However, when condensation
· occurs, a film of dew coats the mirror.
Light from
the LED is then scattered
by the dew, some of it being detected
by the receiver. An electronic circuit
regulates
the cooling of the mirror so
as to
maintain a stable film of dew.
When the temperature has stabilized
the dew is assumed to be stable and
the mirror temperature is measured
by a PtlOO
temperature sensing ele-
ment below the mirror.
To conserve power, a dew-point
measurement is taken only every third
minute. The presence of bodies capa-
ble of
emitting water vapour may
cause
the dew-point to vary slightly.
When the measured dew-point is un-
stable, a message to that effect is dis-
played.
Air Velocity Transducer
The Air Velocity Transducer
(MM 0038) is based on the constant
temperature anemometer principle.
Air velocity is
measured as a function
of
the heat loss from a heated body, by
measuring
the power input required to
maintain a constant temperature dif-
ference between
the two sensor ele-
ments (Fig. 6).
The heat loss is, however, also a
function of
the temperature and direc-
tion of the airflow, and the radiative
exchange with
the surroundings. The
errors associated with these effects are
eliminated
through the design and
construction of the MM 0038 which
uses two identical
temperature sensi-
tive ellipsoidally
shaped bodies, one of
which is
heated and the other unheat-
ed. The eccentricity of the ellipsoids
and the length of the heating coils are
optimised
to give the smallest possible
variation
in directional sensitivity.
The controlled electrical heating
maintains a constant temperature dif-
ference
of l5°C (27°F), independent
of the ambient temperature, between
the two bodies.
Inputs
The five different types of Trans-
4
Fig. 7 Four Transducers mounted on the Delta Arm and Tripod
ducer can be simultaneously connect-
ed to the Analyzer. (Tripod mounting
of four of the Transducers is shown in
Fig. 7).
With the exception of the Air
and Surface Temperature Transduc-
ers, the Transducers have different in-
put plugs, which eliminates the possi-
bility of incorrect connections.
The
Air and Surface Temperature Trans-
ducers have identical inputs enabling
either two Air or two Surface Tem-
perature Transducers to be used at
the same time.
A system configuration of
the In-
door Climate Analyzer Type 1213 is
shown in Fig.
9. Signals from the
2 B: 146 Btu/ft
2h
F.TEMP.
TEMP. 21 . 0 o C 0.04 m/s
--- TEST! HG ---
Transducers are fed into analogue cir-
cuits which provide signal condition-
ing.
The analogue signals are then
converted to digital data via a twelve
bit AID Converter.
Microcomputer
Contained within the Microcomput-
er are a real time digital clock, a ROM
(Read Only Memory) for program and
algorithm storage and a RAM (Ran-
dom Access Memory) for storage
of
the measured data. The Type 1213
also incorporates a
D/ A Converter
which provides linearized analogue
signals
to the analogue outputs on the
rear panel of the Type 1213.
47.3 ° F II
VAP. PRES.
.921
kPa II
0. 03 m/sl l
II REL.HUMIDITY
36 X II
MEASURIHG
II
COHHECT TRAHSDUCER II
II
SELECT RECORD-TIME
DISPLAY DR PLOT ?
II ELAPSED TIME
o. osll
GAIH CALIBRATIOH ~
REPLAYIHG
SELECT REPLAY DATA II SAMPLE
HO.
II 840941
Fig. 8 Examples of some of the Indoor Climate Analyzer Type 1213 Displays

Radiant Temperature Asymmetry Air Temperature
Transducer Transducer Surface Temperature
Transducer Humidity
Transducer
Air Velocity
Transducer
r---
I
I
I
Analogue Thermal
Radiation
circuit
L _ ______ _
A/D Converter
Microcomputer
Analogue Temperature
Circuit
Analogue Regulation
of Mirror Cooling
Zero & gain
calibration !)ignals
Front Panel
Fig. 9 Sy stem configuration for the Indoor Climate Anal yzer Type 1213
Memory
The RAM is powered by a small
built-in
lithium battery. This internal
battery ensures that the data are re-
tained (for more than 5 years) even
when
the Analyzer is switched off or
the main power supply is disconnect-
ed. A series of
up to sixty measure-
ments of each parameter can be re-
tained in the Memory. The selected
measurement duration over which the
recording was obtained is also stored.
Display
The Type 1213 has a bright 20 char-
acter alphanumeric Display. As well as
providing numerical
data, this Display
provides easy-to-understand guidance
on
the Analyzer's use. Some informa-
tion and data that can be obtained on
the Display is shown in Fig. 8.
The Indoor Climate Analyzer incor-
porates a
number of self-test func-
tions.
When these tests find a fault an
appropriate error message appears on
the Display.
Controls
All pushkeys are situated on the
front panel of the instrument and are
grouped into three sections: transduc-
er controls, operating mode selection
and recording time selection (see Fig-
ure on
front page).
The transducer selection controls on
the left hand side of the Analyzer are
in turn divided into four groups;
"Temperature", "Radiation", "Air Ve-
locity" and "Humidity".
------,
Analogue Air Velocity
Circuit
D/A
Converter
I
I
I
I
I
X Output
Re~ote
Control
I
Y Output
I
I
-- ------------- _j
840692
Temperature
The "Temperature" section consists
of two pushkeys which are used
to
select either the "Air" or the "Surface"
Temperature Transducer.
Radiation
The "Radiation" section has three
pushkeys which select the way in
which
the signal from the Radiant
Temperature Asymmetry Transducer
is presented. Incident thermal radia-
tion on the two opposing faces of the
Transducer can be displayed either in
temperature units or in terms of the
incident power. Alternatively, the dif-
ference in
incident thermal radiation,
known as
the radiant temperature
asymmetry (6tpr), between the two
faces of
the Transducer can be dis-
played using
the "Asymmetry" push-
5

key. The asymmetry data can be dis-
played
either in numerical form, or as
a
bargraph (by pressing "Asymmetry"
twice). This latter display is particu-
larly useful when finding
the direction
of
maximum temperature asymmetry.
Air Velocity
Th~?. "Air Velocity" section has two
pushkeys;
"Mean Value" and
"Std. Dev". When "Mean Value" is se-
lected two values are
obtained on the
Display. The left-hand value is the air
velocity
measured with a 5 second
time constant, while the right-hand
value is a linear three-minute-mean
air velocity. The displayed three-min-
ute value is updated every 10 seconds.
The "Std. Dev." pushkey also provides
two values on
the Display. These are
the standard deviations for the 5 sec-
ond and three minute measurements.
Humidity
The "Humidity" section consists of
three pushkeys; "Rel. Hum.",
"Vap. Pres."
and "Dewpoint". Mea-
surements of relative humidity can
only be
obtained if both the Air Tem-
perature and Humidity Transducers
are connected to the Analyzer. The
atmospheric partial water vapour
pressure (measured
in kPa.) can be
displayed using
the "Vap. Pres." push-
key, while
the dew-point temperature
is obtained using the "Dew-point"
pushkey.
Mode
Three pushkeys ("Display", "Re-
cord"
and "Replay /Plot") determine
the operating mode of the Indoor Cli-
mate Analyzer. These pushkeys are
grouped in
the centre of the front pan-
el
and their operation is described in
the "Operation" section below.
Recording Time
The "Recording Time" pushkeys on
the right- hand side of the front panel
are normally only
activated in the
"Record" mode, when they are used to
select
the measurement period over
which
the data are to be recorded. A
choice of four periods (1,
6, 24 and 120
hours) is available. However, in either
"Display" or "Replay /Plot" mode, the
"120 h/Units" pushkey converts the
displayed data from S.l. to Imperial
units or vice versa.
Outputs
The Indoor Climate Analyzer has
three output sockets on the rear panel
(2 BNC and one 8--pin "Recorder").
The output obtained is dependent
upon the operating mode of the Type
1213 (see "Operation" section).
6
Fig. 10 Output of recorded data from Type 1213 to Type 2308 X-Y Recorder
In "Replay" mode, data stored in
the Memory can be obtained via the
outputs. In "Display" and "Record"
modes, the current data which is on
the Display is available. The output
can thus be determined by the param-
eter pushkey selected. When air veloc-
ity
measurements are selected, a lin-
earized voltage proportional to
the in-
stantaneous air velocity is obtained on
the X-output and one proportional to
the 5s measurement on the Y -output.
The outputs can be connected to an
X- Y Recorder such as B & K
Type 2308 as shown in Fig. 10, or one
of the B & K range of Level Recorders
may be used. Special recording
paper
(in either S.l. or Imperial units) is
available for use with
the Chart Re-
corder
Type 2308. An example of a re-
BrOel &Kjrer
!r~~:~~~~;etJ'ewpoint I Plane Radiant Temp.
100 50
Measurement Object:
80 40
Open-plan
office
Location
12 60 30
(see map)
40 20
SI-Unita
20 10
Dewpoint Zero
Cat.....,.
Vapour Pressure 0 0
Rei. Hum.
Asym. (A-B)
-40 -20
Pl . Rad. Temp.(A)
1Jl Std. Dev. -60 -30
6 h Air Velocity
24 h Surf. Temp.
-80 -40
120 h - ~ir _ T _ ernP. :.
-100 -50 0
10
1
4
20
0
Date~ Time..!!.:§_ 0
0
Sign. M.M.
I. Ill,,,,,,,, I I
1 Sampleno . 10
QP 3571
20
2
8
40
.. I,
20
cording is shown in Fig. 11.
If the Type 1213/WH 1791 has been
ordered, output to instruments with
serial, parallel or digital interfaces will
be possible.
Printout of measurements
can, for example, be obtained from the
Graphics Printer Type 2318/ZI 0054.
Power Supply
The Analyzer is supplied with 6 al-
kaline
batteries (QB 0004), contained
in a detachable Battery Box. Re-
chargeable
NiCd cells (optional acces-
sories)
can also be used. If the battery
supply runs down, the warning "BAT-
TERY LOW" appears on the Display.
Rechargeable cells
can be charged
in-situ using Battery Charger ZG 0283
(also available) or
any other suitable
30
3
12
60
I !I
30
40 50
4 5
16 20
80 100
''""""'I"
40 50·
9 90 650
8 80 600
7 70 550
6 60 500
5 50 450
4 40 400
3 30 350
2 20 300
1 10 250
0
SO min
6h
24h
120h
0 200
'"""
60 840878
Fig. 11 Graph obtained from a Type 2308 X-Y Recorder connected to Type 1213

DC power supply. An optional Mains
Power Supply (ZG 0199) enables the
Type 1213 to be powered continuously
from the mains and can be used as a
battery charger.
Operation
The Indoor Climate Analyzer has
three operating modes: "Display",
"Record" and "Replay /Plot".
Display Mode
Each time the instrument is
switched on, it automatically enters
the "Display" mode. Immediately af-
ter switching on, the Type 1213 un-
dergoes a short internal self-testing
routine in which the basic functions
such as the AID conversion, validity of
the program in the ROM and the
functioning of the RAM are checked.
Thereafter, data can be read directly
from the Display by selecting the de-
sired pushkey.
The selection of measurement data
for display depends upon the pushkey
selected. In most cases the measure-
ments are displayed instantly. Howev-
er, if either "Air Velocity" or "Humid-
ity" parameters are selected as soon as
the instrument is switched on, a delay
occurs during which the first measure-
ment takes place. During this initial
delay period the Display indicates
that the instrument is "MEASUR-
ING". Subsequent selections of either
"Air Velocity" or "Humidity" mea-
surements provide instantaneous dis-
plays of the last measured value.
In the "Display" mode it is also pos-
sible to obtain instantaneous air veloc-
ity measurements via the X-output on
the rear panel of the Type 1213.
Record Mode
The "Record" mode of the Type
1213 is used to select, automatically
measure and record data. The user
can choose between the four different
measurement periods by using the
"Recording Time" pushkeys. The
Type 1213 automatically spaces the
measurements equally throughout the
pre-selected measurement period.
Provided that all five different
transducers are connected to the In-
door Climate Analyzer, simultaneous
recording of all measurement data is
possible. If a measurement is selected
for recording when the relevant trans-
ducer(s) are not connected, "CON-
NECT TRANSDUCER" appears on
the Display. Thus, the operator can
ensure that the required transducers
are connected, before the recording
takes place.
Once the recording period has com-
menced the Indoor Climate Analyzer
automatically switches to a low power
mode
extending battery life. In this
low power mode the Display remains
blank and all LEDs with the exception
of the "Record" pushkey LED are ex-
tinguished.
It is possible to obtain data on the
Display whilst still recording, by
pressing the "Display" pushkey. The
requisite measurement can then be
obtained on the Display by selecting
the appropriate pushkey. In addition
to the data being measured, it is also
possible to obtain a read-out of the
elapsed measurement period.
If left in the activated state for of
four minutes without any pushkeys
being operated, the Analyzer automat-
ically reverts to the low power mode.
When the full recording period has
been completed the Indoor Climate
Analyzer remains in the low power
mode. However,
the LED on the "Re-
cord"
pushkey flashes to indicate that
recording and storage of data have
been completed.
Replay/Plot Mode
The third operating mode of the
Type 1213 is "Replay /Plot", which is
used to recall data stored in the Ana-
lyzer Memory. Stored data can either
be replayed on the Display, or output
to a graphic recorder via the rear pan-
el sockets on the Analyzer.
When replaying data on the Dis-
play, the user can either step through
all recorded data for a single parame-
ter, or alternatively, look at all data
recorded at one measurement interval.
Stored data are labelled with a "SAM-
PLE NO." and the Display automati-
cally alternates between sample num-
ber and recorded data.
When plotting data, the Type 1213
provides both zero and gain calibra-
tion signals. Plotting data from the
Type 1213 is particularly easy with
the B & K X-Y Chart Recorder, for
which special graph papers (QP 3571
and QP 3572) are available. However,
other X - Y Recorders and Level Re-
corders may also be used.
Applications
In workplaces, such as offices or
electronic assembly halls, where activ-
ity is predominantly sedentary, the
thermal environment often plays a
Fig. 12 Application of the Indoor Climate Analyzer Type 1213 in a museum
7

r
major role in creating satisfactory con-
ditions.
Thus, the Indoor Climate An-
alyzer has widespread applications in
the heating and air-conditioning
fields,
both in buildings and vehicles.
The Analyzer can be used in con-
junction with the Thermal Comfort
Meter Type 1212 to help in the provi-
sion of more acceptable working, trav-
elling or leisure conditions. Using
the
Type 1213, measurements can be con-
ducted to see if an existing environ-
ment is satisfactory, or to determine
the type and size of any improvements
to heating and air conditioning plant
that are required. Once changes have
been made,
the Analyzer can be used
to assess
whether the improvements
are effective.
It can also be used to
investigate complaints from
staff and
provide quantitative data to help
overcome
the problems encountered.
Fig. 13 Application of the Indoor Climate Analyzer Type 1213 in a production hall
Specifications Type 1213 and Transducers
Stated measurement ranges and accuracies
are
for the combination of Type 1213 and
transducer
AIR TEMP. TRANSDUCER (MM 0034):
Measurement Range: -20 to 50°C
(- 4 to122°
F)
Response Time: 20 s to 50% of step change,
50 s to 90 % in still air
Accuracy: 5 to 40 °C range: ± 0,2°C
(41 to 104°F range: ± 0,4° F)
- 20 to 50 °C range: ± 0,5°C
(- 4 to 122°F range: ± 0,9° F)
SURFACE TEMPERATURE TRANSDUCER
(MM 0035):
Measurement Range:- 20 to 100°C
(-4 to 212° F)
Response Time: 2 s to 50%, 7 s to 90%
Accuracy: 5 to 40 °C range: ± 0,5°C
(41 to 104°F range: ± 0,9° F)
-20 to 100°C range: ± 1,0°C
(- 4 to 212°F range: ± 1 ,8 ° F)
RADIANT TEMPERATURE ASYMMETRY
TRANSDUCER . (MM 0036):
Measurement Range: ta ± 50 °C (± 90° F)
Response Time: 15 s (50%), 60s (90%)
Accuracy:
Error t. = air temp.
in
~ [K] tp, = pl. rad. temp.
tpr-ta [K]
HUMIDITY TRANSDUCER (~M 0037):
Dew Point Range: ta- td < 25°C (45° F)
Accuracy: ta- td < 10 K: ± 0,5 K
10K < t8 -tct < 25K : ± 1, 0K
Measuring Time: Typically 1 minute
Measuring Interval: 2 minutes
AIR VELOCITY TRANSDUCER (MM 0038):
Measurement Range: 0,05 to 1 m/s
(1 0 to 200 ft/minute)
Response Time: 0,2 s to 90% of step change
Accuracy: Laminar and turbulent air flows,
± 5% ± 0,05 m/s (10ft/min) for any flow di-
rection greater than 15° from rear of trans-
ducer axis
DATA RECORDING:
Recording Periods: 1, 6, 24 and 120 hours
Storage: 60 values of each pre-selected pa-
rameter evenly spaced over selected mea-
surement period
DISPLAY:
20
character alphanumeric Display for push-
key selectable
data read-out. User guidance
is also provided on Display
RECORDER OUTPUTS:
2 BNC sockets accept JP 0035 plugs. Provide
X & Y analogue outputs for X-Y Recorder
Voltage Range: - 5 V to + 5 V
Output Impedance: < 50 Q
Minimum Load Impedance: 10 kQ
POWER SUPPLY:
Internal Power Supply: Plug-in battery pack
with 6 IEC R20 alkaline batteries (supplied) or
6 NiCd rechargeable cells.
External Power Supply: Standard DIN sock-
et for connection to external 6 to 15 V DC
supply (safety class
3) or Battery/Mains Pow-
er Supply (safety class 2)
ENVIRONMENT:
Operating Temp: 5 to 40°C (41 to 104°F)
Storage Temp: (1213 and Transducers)
-25
to 70°C (-13 to 158°F).
Humidity: 90% non-condensing
Electromagnetic: Complies with U.S. FCC
requirements, Class B
WEIGHT:
3,1 kg inc. batteries (6,8 lbs)
DIMENSIONS:
Height: 133 mm (5,2 in)
Width: 210 mm (8,3 in)
Depth: 200 mm (7,9 in)
ACCESSORIES INCLUDED WITH 1213:
Battery Box.... .... ... ..... ... ..... ..... .. ... ........... ZG 0146
6 Alkaline Batteries (lEG LR20) .......... QB 0004
7 -pin DIN plug for ext. power
supply......... .. .................................. ... .. .. .... JP 0703
2 4-pin DIN plugs for MM 0034
and MM 0035 ..... ............ .. ............... .. . ... ... JP 0402
6-pin DIN plug for MM 0038 ... ... .. ... ... ... JP 0600
8-pin DIN plug for MM 0037 .. ........... .. ..JP 0808
12-pin DIN plug for MM 0036 .. ....... .... .. JP 1205
2 BNC Coaxial Plugs ................... ... .. ..... JP 0035
2 2A stow-blow fuses .. ......... ...... . .... .. .... VF 001 0
Recording Paper for 2308 (metric) .... QP 3571
Recording Paper for 2308 (imp.)........ QP 3572
Instruction Manual
ACCESSORIES INCLUDED WITH INDOOR
CLIMATE ANALYZER MEASURING SET
TYPE 3532:
Indoor Climate Analyzer ...................Type 1213
Air Temperature Transducer ..............MM 0034
Surface Temperature Transducer.....MM 0035
Radiant Temperature Asymmetry
Transducer*...........................................MM 0036
Humidity Transducer .. ..................... ... . MM 0037
Air Velocity Transducer....................... MM 0038
Transducer Carrying Case .................. KE 0234
Delta Arm for Tripod UA 0587............DH 0492
Tripod Mounting Adaptor (x4) ........... UA 0588
ADDITIONAL ACCESSORIES AVAILABLE:
Rechargeable
NiCd Cell IEC R20
(6 required) ... .... .. .... ... ... ..... .. ...................QB 0008
Battery Charger ............. .. .... .. ... ..... ... ..... ZG 0283
Mains Power Supply............................. ZG 0199
Set
of 16 Radiation Transparent
Windshields UA 0796 ... ......................... UA 0851
Tripod .......................................................UA 0587
Serial and parallel interface . ..... .. .......WH 1791
Interface Cable for use with
Graphics Printer Type2318/ZI 0054
...... AO 0299
BNC Coaxial Cable for use with
recorders Type 2308 and 2317 ...........
AO 0087
Remote Control Cable for use
with recorder Type 2308 ............ .. ........ AQ 0034
Recording Paper for 2308 (metric) .. .. QP 3571
Recording Paper for 2308 (imp.) .... ... . QP 3572
Recording Paper
for 2317.................... QP 0102
Service Manual
* Includes set
of 16 Radiation
Transparent Windshields ............
.. .......UA 0851

2.1. FRONT PANEL
2.1.1. Power Switch
On-Off:
2. CONTROLS
On
6rilei&KIB&r
Indoor Climate Analyzer
Type 1213
Fig. 2. 1. Front panel of Indoor Climate Analyzer Type 1213
The front panel controls of the Type 1213 can be grouped into five
sections:
1. Power switch
2. Transducer selection
3. Mode controls
4. Recording Time controls
5. Display
With the exception of the power switch, all controls have green LEOs
which are either lit,
or flash when activated. However, to conserve
battery
power when recording, the Type 1213 also has a low power
mode, in which only the "Record" LED is lit. Several operations require
the use
of combinations of controls.
Switch for turning the instrument on and off. When in the "Off" posi-
tion the memory remains unaffected and data is retained.
9

2.1.2. Transducer Selection
TEMPERATURE:
Air:
Surface:
RADIATION:
Pl. Rad.Temp:
Asymmetry:
Incident Power:
10
The transducer selection section consists of ten pushkeys which are divided into four
groups.
Mean Std.
Rei. Vap. O.W·
Value Dev .
Hum . Pres. point
Fig. 2.2. Transducer selection controls of the Indoor Climate Analyzer
Type 1213
Two pushkeys with LEOs for selecting either air or surface
temperature.
Selects input from the Air Temperature Transducer for measuring, dis-
playing and recording.
Selects input from the Surface Temperature Transducer for measuring,
displaying and recording.
Three pushkeys with LEOs
for selecting plane radiant temperature, ra-
diant temperature asymmetry and incident radiant power measure-
ments from the Radiant Temperature Asymmetry Transducer input.
Selects plane radiant temperature measurement. The Radiant Tem-
perature Asymmetry Transducer has two identical measuring faces,
one labelled
"A" and the other "B". Both values of plane radiant tem-
perature are simultaneously measured and displayed.
Pushkey to calculate the difference between the two measured values
of plane radiant temperature providing a measurement of the radiant
temperature asymmetry. The displayed value is
A- B. The difference
between the incident radiant power (the incident power asymmetry) is
also displayed.
Note: Pressing the pushkey a second time causes this difference to be
displayed as a bar-graph. See Fig. 2.5.
Pushkey
to calculate the incident radiant power on each face of the
Radiant Temperature Asymmetry Transducer.

AIR VELOCITY:
Mean Value:
Std.Dev.:
HUMIDITY:
Dewpoint:
Vap.Pres.:
Rei. Hum.:
Two pushkeys with LEOs for selecting mean air velocity and standard
deviation measurements.
Two
time-averaged air velocity values are calculated and displayed. A
5s exponential average air velocity is shown on the left
of the Display
and a linear 3-minute mean value on the right of the Display. The
displayed 3-minute mean value is updated every 10 seconds.
A standard deviation
for each of the two mean values is calculated.
Three pushkeys with LEOs for selecting dewpoint, vapour pressure and
relative humidity measurements.
Dewpoint is measured with the Humidity Transducer. The dewpoint is
measured every third minute in order
to conserve battery power and
avoid a continuous film
of dew on the mirror. The last measured value
is always displayed.
Vapour pressure is calculated from the latest dewpoint measurement
and is measured in kPa.
The relative humidity is calculated from the dewpoint and air tempera-
ture measurements.
To obtain this measurement both the Humidity
Transducer and the
Air Temperature Transducer must be connected to
the Type 1213.
2.1.3. Mode Controls
Display:
The Type 1213 has three possible operating modes, these are; "Display", "Record" and
"Replay/Plot". A flashing LED indicates that the appropriate pushkey should be acti-
vated
in order to continue the desired sequence (e.g. the "Record" sequence).
Fig. 2.3. Mode controls
of the Indoor Climate Analyzer Type 1213
The "Display" mode is automatically selected whenever the Analyzer is
switched on. Data is displayed when the appropriate transducer push-
key is selected. The "Display" function can also be used
to obtain
current data, when the Type 1213 is in the "Record" mode. If the "Dis-
play" pushkey is pressed three times in succession while the Type
1213 is in the "Record" mode, recording
of data will be terminated.
11

Record:
Replay/Plot:
The "Display" pushkey can also be used to obtain a displayed read-out
of data stored in the Memory.
Initiates a programming sequence for selecting parameters to be mea-
sured and recorded. The Type 1213 automatically divides the selected
measurement period into 60 equal intervals. Measurements are made
and stored at each interval. For air velocity measurements a
60s lin-
ear average is recorded if a 1 hr recording period is selected, but for
all other recording periods the 3-minute linear average is recorded.
When in the "Record" mode, the "Record" pushkey may be used either
to put the Type 1213 into a
low-power mode where most LEOs are
extinguished, or
it can be used to display the elapsed measurement
time. These functions alternate each time the "Record" pushkey is ac-
tivated. The Analyzer automatically reverts to the
low-power mode if
no pushkey has been activated for 4 minutes.
Is used to recover stored data from the Type 1213 memory. When
pressed, the user can replay stored data, either on the Display
or via
the outputs on the Rear Panel. If the Display is selected, the
"Replay/Plot" pushkey is used to step through the data stored in the
memory. If the Rear Panel outputs are selected, "Replay/Plot" is used
to obtain "Zero" and "Gain" calibration signals for the
X-Y Recorder
and also to initiate data plotting once the parameters have been
selected.
2.1.4. Recording Time Controls
1h:
6h:
24h:
12
Four pushkeys for the selection of the recording time. One pushkey has the additional
function of changing the measurement units from Sl to Imperial and vice versa.
Fig. 2.4. Recording Time
controls of the Indoor Climate Analyzer Type
1213
Used to select a one-hour recording period. When selected, measure-
ments are made every minute.
In the "Display" and "Replay/Plot"
modes this pushkey cannot be used.
Used to select a
six-hour recording period. When selected, measure-
ments are made every six minutes.
In the "Display" and "Replay/Plot"
modes this pushkey cannot be used.
Used to select a 24-hour recording period. When selected, measure-
ments are made every twenty four minutes.
In the "Display" and
"Replay/Plot" modes this pushkey cannot be used.

120h/Units:
2.1.5. Display
2.2. REAR PANEL
TRANSDUCERS:
Used
to select a 120-hour recording period. When selected, measure-
ments are made every
two hours. In either the "Display" or
"Replay/Plot" modes this pushkey can be used to change the dis-
played data measurement units from Sl
to Imperial or vice versa.
---------------------------------------------- ··
-··· -· -- -·-· -- -~· -- -· _ .. -
+ 1 2 3 Lt ~ .:; { ~: ~ tO !
"""~~- -- --------~ -~
Fig. 2.5. Display of the Indoor Climate Analyzer Type 1213
Twenty-character alphanumeric Display displays measurement data in real-time. It can
also be used for replaying data stored in the Analyzer Memory. Temperature (°C) mea-
surements are displayed
to one decimal place; velocity measurements to two decimal
places (for metric units); degrees Farenheit
to the nearest integer. All measurements are
clearly annotated. Information for using the instrument is also displayed.
Fig. 2.6. Rear Panel of Indoor Climate Analyzer Type 1213
Five input sockets for connection of Transducers to the Type 1213.
The sockets are different (except
for the MM 0034 and MM 0035) to
ensure the Transducers are properly connected.
Air Temp. MM0034: 4-pin socket
for connection of the Air Temperature Transducer
MM 0034. A MM 0035 Surface Temperature Transducer can be con-
nected
to this socket in place of the Air Temperature Transducer.
13

Surf. Temp. MM 0035:
Air Vel. MM0038:
Radiation MM 0036:
Humidity MM 0037:
ANALOG OUTPUT:
Analog
Output
X-Out
X-Out
X-Out
Y-Out
Y-Out
Y-Out
Y-Out
Y-Out
Y-Out
Y-Out
Y-Out
Y-Out
4-pin socket for connection of the Surface Temperature Transducer
MM 0035. The electrical connections for this socket are similar to Air
Temp. MM 0034 and thus this socket can also be used to connect a
second
Air Temperature Transducer in place of the Surface Tempera-
ture Transducer. This enables simultaneous measurement
of air tem-
perature in two places to be obtained (for example at two different
heights).
6-pin
socket for connection of the Air Velocity Transducer MM 0038 to
the Type 1213.
12-pin
socket for connection of the Radiant Temperature Asymmetry
Transducer MM 0036 to the Type 1213.
8-pin socket for connection of the Humidity Transducer MM 0037 to
the Type 1213.
Two BNC
sockets accepting plug JP 0035 for connection of an X-Y
Recorder, Level Recorder, etc. The outputs and voltage scalings are
given in Table 2.1.
Parameter
Output Voltage
5.1. Units Imperial Units
Ramp
0- 4,8V 0- 4,8V
Pl. Radiant
100mV/°C
50mV/°F
Temperature (B)
Instantaneous
10V/(m/s) 50 mV /(ft/min.)
Air Velocityc
Surface
50mV/°C 25mV/°F
Temperature
Air temperature
100mV/°C 50mVJOF
Dew Point 100mV/°C 50mV/°F
Incident Power
20 mV /(W/m
2
)a mV /(Btu/ft
2h)b
Plane Radiant
100mV/°C
50mV/°F
Temperature (A)
Vapour Pressurec 1
V/kPa 1 V/kPa
Relative
100mV/%
100mV/%
Humidityc
Air Velocityc
10V/(m/s) 50 mV /(ft/min.)
Standard
10V/(m/s) 50 mV /(ft/min)
Deviation
a) -9 V offset b) -7,5 V offset c) -5 V offset
T00635GBO
RECORDER:
14
Table 2.1. Voltage outputs for the different parameters measured by
the Indoor Climate Analyzer (in DISPLAY mode)
8-pin socket accepting plug JP 0802 or Control Cable AQ 0034 for
connection to X- Y Recorder Type 2308. Electrical connections are
shown in Fig
2. 7.