Lufft XP201 User manual

Bedienungsanleitung
XA1000 / XP400 / XP201 / XP200
Bedienanleitung / Manual
XA1000 / XP400 / XP201 / XP200
www.lufft.de
www.lufft.com

1Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 GB
Preface
The operating manual only describes the
multifunction measuring meter and its intended use.
Detailed descriptions of the sensors and optional
accessories as well as tips for proper and practical
use of the multifunction measuring meter are not
included in this operating manual.
The current version of the operating manual and the
general catalogue can be found at: www.lufft.de
Symbols
Hazardous electric current!
Warns of hazards from electric current
which can lead to injuries or even death.
Danger!
Warns of a hazard which can lead to
personal injury.
Caution!
Warns of a hazard which can lead to
damage to property.
Definitions
Table of contents
Notes regarding the operating manual ................. 01
Information about the device ............................... 03
Safety.................................................................. 05
Transport and storage ......................................... 07
Operation ............................................................ 08
Calibration........................................................... 27
PC software......................................................... 36
Errors and faults .................................................. 37
Maintenance........................................................ 38
Available digital sensors ...................................... 40
Further accessories (optional) .............................. 40
Disposal .............................................................. 41
Declaration of conformity..................................... 41
Notes................................................................... 42
Notes regarding the operating manual
Concept Meaning
SDI connection
Serial Digital Interface;
digital serial interface for connecting sen-
sors
SmartGraph3 PC software for analysis and visualisation
of measured values
Calibration
Detection of the measurement deviation
of a sensor, see also calibration certifi-
cate
Adjustment Setting of a sensor, approximation of a
measured value to the real value

GB Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 2
Legal notice
This release replaces all previous versions. No part of
this publication may be reproduced without written
permission from Lufft®. The same applies for
electronically processing, duplicating or spreading the
publication. Subject to technical changes. All rights
reserved. Trademarks are used without guarantee
that they may be used freely and primarily following
the spelling of the manufacturer. Product names are
registered.
Changes to construction in the interests of constant
improvements to the product, as well as changes to
the shape and colour are reserved.
The scope of delivery may vary from product images.
This document was created with all due care. Lufft®
accepts no liability whatsoever for possible mistakes
or omissions.
The only party responsible for determining measured
results to be valid, drawing conclusions and deriving
actions is the user! Lufft® accepts no claims of
warranty for correctness of detected measured values
or measured results. Further, Lufft®accepts no
liability whatsoever for possible mistakes or damage
which have been caused by utilising the detected
measured results. © Lufft®
Warranty
The warranty is for 12 months. Damages caused by
incorrect use by untrained people or startup by
unauthorised people are excluded from the warranty.
The device complies with the fundamental health and
safety requirements of the applicable EU regulations
and was tested at the factory for perfect functionality
multiple times. However, if faults in the functionality
occur and cannot be remedied with the measures in
the chapter "Errors and faults", please get in touch
with your dealer or distributor. When making a
warranty claim, supply the device number (see the
rear of the device). The invoice acts as warranty
certificate. When manufacturer's instructions or legal
regulations have not been followed, or after
unauthorised changes to the device are made, the
manufacturer is not responsible for the resulting
damages. Changes to the device or unauthorised
replacement of individual parts can drastically impact
the electrical safety of this product and leads to the
forfeit of the warranty. Liability does not extend to
damages to people or property caused by the device
being used other than as described in the instructions
in this operating manual. Subject to changes to
technical design and model changes as part of
constant development and product improvement
without prior notice.
No liability is accepted for damages resulting from
improper use. In such cases, entitlements to a
warranty are then also forfeited.

3Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 GB
Description of the device
The multifunction measuring meter XA1000 / XP400 /
XP201 / XP200 is used for carrying out accurate
measured value detection. Several sensors can be
connected to the digital interface of the device for this
purpose.
The operating elements are located on the front and
sides of the robust housing. A scratch proof colour
display with touch function (1) allows entering and
selecting values and functions and also displaying
detected results. You can also navigate the device
software by using the cross control (3) and the "OK"
key (5) and select measuring functions.
By pressing the "Back" key (2) you return to the
previous screen of the device software. Pressing the
"Main menu" key (6) directly opens the main menu.
Pressing the "Illumination on/off" key (4) either
switches the background illumination for the colour
display and the keys on or dims them.
Located above the colour display (1) is the connection
for the digital sensors (7). Here connect the
appropriate digital sensor for the corresponding
situation. The universal interface of the digital sensors
allows the multifunction measuring meter to
automatically detect the sensor construction, so that
after switching the device on the corresponding
measuring mode is displayed automatically. If no
sensor is connected, an error code (see chapter
"Status and error codes") is shown in the colour
display (1). Depending on the sensor construction, it is
calibrated to the prevailing ambient conditions after
connection. On the basis of the various basic
measured values, such as temperature and humidity,
the multifunction measuring meter calculates the
desired derived measured values like the dew point
temperature, partial vapour pressure etc.
The measured results of the connected sensor are
shown in the device's colour display (1).
The "On/Off" key (9) and a USB port (10) can be found
on the sides of the device.
You can connect the device to a computer by using the
supplied USB connection cable. Then you can extract
and analyse your measured results with the
SmartGraph3 software.
Device depiction
Information about the device
No. Operating element
1 scratch proof colour display with touch function
2"Back"key
3 cross control with "Up", "Down", "Left", "Right" keys
4 "Illumination on/off" key
5 "OK" key
6 "Main menu" key
7 port for digital sensors (5-pin)
8 battery compartment with battery cover
9 "On/Off" key
10 micro USB port
1
2
3
4
5
6
7
8
910

GB Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 4
Technical data
*Data are subject to change (e.g. new sensors for additional
measurements). As the case may be, using new sensors requires
an update of the device software.
Parameters Values
Multifunction measuring meter, model XA1000 XP200 XP400
Sensors*
Temperature / humidity
(digital sensor)
Temperature / humidity
(digital sensor) -
Air flow / temperature (digi-
tal sensor) -Air flow / temperature
(digital sensor)
Air pressure (integrated air
pressure sensor)
Air pressure (integrated air
pressure sensor)
Air pressure (integrated air
pressure sensor)
CO2sensor
(digital sensor) --
Integrated air pressure sensor
Air pressure measuring range 800 to 1100 mbar (complete accuracy)
Air pressure accuracy at 25 °C, 1013.25 mbar max. ±0.5 mbar
Air pressure long term stability type -1 mbar/year
Air pressure measurement resolution 0.024 mbar
Operating range
Operating temperature 0 °C to +50 °C
Relative air humidity <90%or<20g/m
3(non-condensing)
Height above sea level (NN) max. 4000 m
Storage
Relative air humidity < 90% (non-condensing)
Ambient temperature -20 °C to +60 °C
Energy
Battery 4 x Alkaline LR6 AA, 1.5 V
Optional power supply 5 V USB
Power consumption, active approx. 400 mW
Battery lifespan, passive approx. 1 year
Battery lifespan, active at least 24 h
Sensor supply 5.5 V ±10 % DC, max. 200 mA
Further information
Measured value storage for approx. 200 measuring projects consisting of up to 3 x 3600 (=10,800) measuring
points, that is a total of 200 x 10,800 = 2,160,000 measuring points
Dimensions (L x W x H) approx. 170 x 62 x 34 mm
Weight approx. 205 g
Real time clock with calender programmed to 2099

5Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 GB
Scope of delivery
The scope of delivery includes:
• 1 x Multifunction measuring meter
• 1 x USB connection cable
• 4 x Alkaline LR6 AA, 1.5 V batteries
• 1 x Getting started guide
• 1 x Factory test certificate
Additionally available free of charge is the
SmartGraph3 PC software
(www.smartgraph3.de/download) for archiving and
analysing data.
XP201 (sold separately, order no. 5810.20)
The XP201 set consists of the following components:
• 1 x Multifunction measuring meter XP200
• 1 x Probe 8130.TFF
(temperature/humidity highly accurate)
• 1 x DAkkS calibration certificate
Carefully read the operating manual before using
the device and keep it within reach!
• Do not use the device in atmospheres containing
oil, sulphur, chlorine or salt.
• Ensure that all connection cables are protected
from damages (e.g. from kinks or crushing).
• Protect the device from permanent direct sunlight.
• Observe the storage and operating conditions (see
chapter "Technical data").
Intended use
Use the Multifunction measuring meter XA1000 /
XP400 / XP201 / XP200 only in the field of climate
diagnostics, while adhering to and following the
technical data.
To use the device for its intended use, only connect
and use accessories and spare parts which have been
approved by Lufft®.
Intended use includes e. g.
• the analyses of
– supply and exhaust air flows,
– fluctuations in relative humidity,
– condensate formation,
– heat build-ups and temperature fluctuations and
• the utilization as reference device according to
DIN EN ISO 9001.
Improper use
Do not use the device in potentially explosive
atmospheres, or for measurements in liquids. Lufft®
accepts no liability for damages resulting from
improper use. In such a case, entitlements to a
warranty are forfeited. Any unauthorised
modifications, alterations or structural changes to the
device are forbidden.
Safety

GB Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 6
Personnel qualifications
People who use this device must:
• know and understand the dangers of working near
live parts.
• take measures to protect themselves from direct
contact with live parts.
• have read and understood the operating manual,
especially the "Safety" chapter.
For maintenance or repair work which requires
the housing to be opened, contact Lufft®
customer service. Devices which have been
opened unlawfully are void of any warranty and
warranty claims.
Residual risks
Hazardous electric current!
Work on the electrical components must
only be carried out by an authorised
specialist company.
Hazardous electric current!
Never measure live parts.
Danger!
Do not leave the packaging lying around.
Children may use it as a dangerous toy.
Danger!
The device is not a toy and does not
belong in the hands of children.
Danger!
Dangers can occur at the device when it
is used by untrained people in an
unprofessional or improper way. Observe
the personnel qualifications.
Caution!
To prevent damages to the device, do not
expose it to extreme temperatures,
extreme humidity or moisture.
Caution!
To prevent damages to the device or to a
connected sensor due to overheating,
observe the permissible operating and
measuring ranges of the device and the
connected sensor. The corresponding
specifications are provided in the general
catalogue for industrial measuring
devices or on www.lufft.de under the
"Information material – Industrial
measuring devices" menu.

7Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 GB
Transport
To safely transport the multifunction measuring meter
and accessories, use the transport case (11)
recommended by Lufft®. Otherwise, protect the
device during use and transport with an optional
device bag (12). Contact Lufft®customer service if
you want this alternative version.
The transport case is equipped with special
compartments where the multifunction measuring
meter and accessories can be kept as follows:
Transport and storage
11
12
No. Operating element
13 CO2sensor
14 TFF sensor
15 TFF sensor with handle
16 Flow sensor with handle
17 3x calibration solution
18 Sensor/actuator cable (connection cable)
19 Multifunction measuring meter XA1000
20 Batteries
21 Abridged operating instructions
22 USB power plug
23 USB cable
24 Temperature/humidity sensor
15
24
23
22
21
20 19
18 17
16
14
13

GB Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 8
Storage
When the device is not being used, observe the
following storage conditions:
•dry,
• protected from dust and direct sunlight,
• with a plastic cover to protect it from invasive dust,
if necessary.
• The storage temperature is the same as the range
given in the chapter "Technical data".
• When storing the device for a long time, remove
the batteries.
• To store the device, use the transport case (see
chapter "Transport") wherever possible.
Inserting the batteries
Switching on
1. Press and hold the "On/Off" key for approx. 3
seconds until the device beeps.
2. Release the "On/Off" key.
– The colour display is switched on. The device is
ready for operation as soon as the screen of the
particular measuring mode is displayed
(depends on the connected sensor).
Switching off
1. Press and hold the "On/Off" key for approx. 3
seconds until the device beeps.
2. Release the "On/Off" key.
– The colour display is switched off.
Operation

9Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 GB
Description of screen elements
When using the device, take special note of the
following important operating elements and displays:
• The "Back" key (2) opens the previous menu.
• The "Main menu" key (6) opens the main menu.
• Name of the current screen (26)
• Indication of the current time (27)
• The "padlock" symbol (28) appears when you
press and hold the "On/Off" key for approx. 1
second during a measurement. The touch function
of the colour display is locked. To release the lock,
press and hold the "On/Off" key for
approx. 1 second.
• The "lightbulb" symbol (29) appears when you
have used the "Illumination on/off" key to switch
on background illumination (see chapter
"Information about the device").
• Indication of the battery loading status (30); a plug
symbol is shown when power is supplied via a USB
connection.
All options which can be selected via touch function
can also be selected by using the cross control and
the "OK" key.
For safety reasons, some options can only be selected
and configured by using the cross control and the
"OK" key (e.g. date and time in the "Settings" screen).
30
26
62
292827

GB Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 10
Setting the language
1. Press the "Main menu" key (6) to open the main
menu.
2. Press the "Settings" key in the main menu.
3. Press the language selection key (31) in the
"Settings" screen.
4. Press the key with the desired language from the
following screen.
– The selected screen language is activated
immediately.
5. Press the "Back" key (2) to return to the desired
measuring mode. Alternatively press the "Main
menu" key and then the "Measuring mode" key.
Main menu
You can open the following menus from the main
menu:
6
31
Measuring mode: Perform measurements in compliance with the
connected sensor. If no sensor is connected,
only the values from the integrated air pressure
sensor are available.
Archive: Open archived measured values.
Settings: Make any device settings.
2

11 Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 GB
"Measuring mode – Air pressure" screen (integrated sensor)
Note!
This measuring mode is only displayed when no
digital sensor is connected.
41403938
36
A.
34
B.
37
C.
35
120
34 When using the integrated air pressure sensor, only select the
measured values for air pressure (see fig. B.). The latest
measured value is displayed next to the corresponding key on
the right (also see chapter "Explanation of the measured
values", page 19).
The remaining selection options are disabled. Should you
select one of the disabled entries, "E55" is displayed. If
applicable, deactivate the display by pressing one of the keys
marked with 34 and actuating the selection "Off" at the end of
the list in the pop-up window (see fig. B.).
35 This symbol indicates that the measured values displayed
under 37 are calculated (e.g. minimum/maximum measured
value).
36 Indicates the measurement duration.
37 Displays the calculated measured values according to the
specifications under 34 and 39. The calculation starts when
switching the multifunction measuring meter on. Actuating
key 38 restarts the calculation of measured values.
38 Sets the measured values displayed under 37 and the duration
shown under 36 back to zero.
39 Specifies how the measured values under 37 are shown
(see fig. C.):
Minimum: Always shows the smallest detected measured
value from a measuring period.
Maximum: Always shows the largest detected measured
value from a measuring period.
Average: Shows the average value of all detected
measured values from a measuring period.
Hold: Holds the current detected measured value and
shows it continually (when this option is
selected).
Off: Switches off the measured values indication
under 37.
40 Carries out an automatic measurement for the duration of a
predefined recording interval. The recording interval can be
specified in the following screen (see fig. D. and fig. E.,
page 12).
41 Saves the currently displayed measured value as single
measurement in the archive with date and time stamp.
120 Calls up the calibration menu for the integrated air pressure
sensor (see Calibration chapter).

GB Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 12
"Measuring mode – Automatic measurement" screen (integrated sensor)
D.
474645
44
E.
42
43
42 mmHg: Displays the measured value according to the
specifications under 34 (e.g. in the measuring
unit millimetres of mercury) and under 39 (e.g.
as average value) (see fig. A.,page 11).
43 Indicates the remaining recording duration for the automatic
measurement.
44 Opens a screen for selecting the recording duration for
measuring over a long period (see fig. E.).
45 Starts recording.
The key turns red once recording has started.
Note!
During an active recording it is not possible to switch off the
multifunction measuring meter with the "On/Off" key.
Automatic switch-off is also deactivated. First stop the
recording by pressing key 46 and then turn off the device.
46 Stops the current recording. The detected values are
automatically saved to the current measuring project.
47 Pauses the current recording.
Key 45 flashes.
Press this key again to continue recording.

13 Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 GB
"Measuring mode – Flowrate" screen
575554
48
53
A.
49
50
B.
51
56
52
48 Shows the measured flow rate as a numerical value in the
selected unit (e.g. m/s).
In order to display and select the available units, touch "Flow
speed" (see chapter "Explanation of the measured values",
page 19).
49 Shows the measured flow rate as visual bars.
50 In order to display and select the available measured values,
touch "Temperature" (see chapter "Explanation of the
measured values", page 19).
Select "Off" to switch the display off.
51 Sets the measured values displayed under 53 and the duration
back to zero.
52 This symbol indicates that the displayed measured values
under 53 are calculated (e.g. minimum/maximum measured
value).
53 Displays the calculated measured values according to the
specifications under 48, 50 and 54:
Time: Duration of the interval
m/s: Shows the flow rate as a numerical value in the
selected unit (e.g. m/s).
°C: Displays the temperature value (e.g. in °C).
54 Specifies how the measured values under 53 are shown
(see fig. B.):
Minimum: Always shows the smallest detected measured
value from a measuring period.
Maximum: Always shows the largest detected measured
value from a measuring period.
Average: Shows the average value of all measured
values which have been detected so far from a
measuring period.
Hold: Holds the current detected measured value and
shows it continually (when this option is
selected).
Off: Switches 53 display off.
55 Carries out an automatic measurement for the duration of a
predefined recording interval. The recording interval can be
specified in the following screen (see fig. C. and fig. D.,
page 14).
56 Opens fig. E.,page 15, where you can specify parameters for
the volumetric flow measurement (e.g. the form of the object
to be measured).
57 Saves the currently displayed measured value as single
measurement in the archive with date and time stamp.

GB Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 14
"Measuring mode – Flowrate – Automatic measurement" screen
C.
58
60
656463
62
D.
59
61
58 Shows the measured flow rate as a numerical value in the
selected unit (e.g. m/s).
You can select the unit under 48 in fig. A., page 13.
59 Shows the measured flow rate as visual bars.
Note!
This display is only available when measuring flow values.
The representations in fig. C. can slightly deviate depending
on the previous setting.
60 Shows the measured temperature value.
61 Shows the remaining time until the automatic measurement
finishes.
62 Opens a screen for selecting the recording duration (see fig.
D.).
63 Starts recording.
The key turns red once recording has started.
Note!
During an active recording it is not possible to switch off the
multifunction measuring meter with the "On/Off" key.
Automatic switch-off is also deactivated. First stop the
recording by pressing key 64 and then turn off the device.
64 Stops the current recording. The detected values are
automatically saved to the current measuring project.
65 Pauses the current recording.
Key 63 flashes.
Press this key again to continue recording.

15 Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 GB
"Measuring mode – Flowrate – Measuring range" screen
69
65
E.
66
67
68
F.
65 Selects the form of the object to be measured. The following
options are available (see fig. F. ):
1. Square (volumetric flow measurement)
2. Round (volumetric flow measurement)
3. Off (no volumetric flow measurement)
Depending on the selected form, a different equation is used
to calculate the measured values.
The presentation of measured values under 48 in fig. A.,
page 13 depends on the settings selected here.
66 Determines the diameter of the object to be measured (with
selection "Round" under 65).
67 Determines the height of the object to be measured (with
selection "Square" under 65).
68 Determines the width of the object to be measured (with
selection "Square" under 65).
69 Saves the settings and returns to fig. A., page 13.
The measured values for the volumetric flow can only be
displayed under 48 in fig. A., page 13.
During volumetric flow measurement, further measured
values, such as the flow rate, can be displayed under 50 in
fig. A., page 13.
Note!
The settings saved here are also used for all following
measurements, unless they are deactivated (in the
corresponding menu item)!

GB Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 16
"Measuring mode – Humidity" screen
A.
70
B.
77767574
72
73
71
70 Specifies how measured values and the corresponding units
are shown (see chapter "Explanation of the measured values",
page 19). The latest measured value is displayed next to the
corresponding key on the right.
Select "Off" to switch the respective display off.
71 This symbol indicates that the displayed measured values
under 73 are calculated (e.g. minimum/maximum measured
value).
72 Indicates the measurement duration.
73 Displays the measured values according to the
specifications under 70 and 75:
°C: Displays the temperature according to the
specifications under 70 (e.g. in degrees
Celsius) and under 75 (e.g. as average value):
g/m3:Displays the humidity according to the
specifications under 70 (e.g. in gram per cubic
metre) and under 75 (e.g. as average value):
mmHg: Displays the air pressure according to the
specifications under 70 (e.g. in the measuring
unit millimetres of mercury) and under 75 (e.g.
as average value):
74 Sets the measured values shown under 73 back to zero.
75 Specifies how the measured values under 73 are shown
(see fig. B.):
Minimum: Always shows the smallest detected measured
value from a measuring period.
Maximum: Always shows the largest detected measured
value from a measuring period.
Average: Shows the average value of all detected
measured values from a measuring period.
Hold: Holds the current detected measured value and
shows it continually (when this option is
selected).
Off: Switches off the measured values indication
under 73.
76 Carries out an automatic measurement for the duration of a
predefined recording interval. The recording interval can be
specified in the following screen (see fig. C. and fig. D.,
page 17).
77 Saves the currently displayed measured value as single
measurement in the archive with date and time stamp.

17 Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 GB
"Measuring mode – Humidity – Automatic measurement" screen
C.
838281
80
D.
78
79
78 Displays the measured values according to the
specifications under 70 and 75 in fig. A.:
°C: Displays the temperature according to the
specifications under 70 (e.g. in degrees
Celsius) and under 75 (e.g. as average value):
g/m3:Displays the humidity according to the
specifications under 70 (e.g. in gram per cubic
metre) and under 75 (e.g. as average value):
mmHg: Displays the air pressure according to the
specifications under 70 (e.g. in the measuring
unit millimetres of mercury) and under 75 (e.g.
as average value):
79 Indicates the remaining recording duration for the automatic
measurement.
80 Opens a screen for selecting the recording duration for
measuring over a long period (see fig. D.).
81 Starts recording.
The key turns red once recording has started.
Note!
During an active recording it is not possible to switch off the
multifunction measuring meter with the "On/Off" key.
Automatic switch-off is also deactivated. First stop the
recording by pressing key 82 and then turn off the device.
82 Stops the current recording. The detected values are
automatically saved to the current measuring project.
83 Pauses the current recording.
Key 81 flashes.
Press this key again to continue recording.

GB Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 18
"Measuring mode – CO2sensor" screen
A.
200
B.
207206205204
202
203
201
200 Specifies how measured values and the corresponding units
are shown (see chapter "Explanation of the measured values",
page 19). The latest measured value is displayed next to the
corresponding key on the right.
Select "Off" to switch the respective display off.
201 This symbol indicates that the displayed measured values
under 203 are calculated (e.g. minimum/maximum measured
value).
202 Indicates the measurement duration.
203 Shows the measured values according to the
specifications under 200:
ppm
(non-average
d):
Displays the current CO2measured value in
ppm (parts per million).
ppm
(averaged):
Displays the median of the last 11 CO2
measured values in ppm (parts per million).
hPA: Displays the air pressure according to the
specifications under 200 (e.g. in the measuring
unit hectopascal) and under 205 (e.g. as
average value).
204 Sets the measured values shown under 203 back to zero.
205 Specifies how the measured values under 203 are shown:
Minimum: Always shows the smallest detected measured
value from a measuring period.
Maximum: Always shows the largest detected measured
value from a measuring period.
Average: Shows the average value of all detected
measured values from a measuring period.
Hold: Holds the current detected measured value and
shows it continually (when this option is
selected).
Off: Switches off the measured values indication
under 203.
206 Carries out an automatic measurement for the duration of a
predefined recording interval.
207 Saves the currently displayed measured value as single
measurement in the archive with date and time stamp.

19 Bedienungsanleitung – Multifunktionsmessgerät XA1000 / XP400 / XP201 / XP200 • 11_2019 GB
Explanation of the measured values
Depending on the measuring mode and used sensor,
the following measured values can be selected to be
displayed in the corresponding measurement units:
[Unit] Measured
value Meaning
[g/m3]
Abs
humidity
Indicates the mass of water vapour in
relation to the volume, in which the humid
gas is contained, in:
• grams per cubic metre
• grains per cubic foot
[gr/ft3]
[hPa]
Abs
pressure
Indicates the barometric air pressure. This
is the currently present pressure, based on
an absolute vacuum of "0" and thus
termed absolute pressure. Possible units
are:
• hectopascal
• millimetres of mercury
• pounds per square inch
[mmHg]
[psi]
[°C]
Ice bulb
temp
Indicates the temperature setting in at the
interface of an icy surface and a gas
gushing past in:
• degrees Celsius
• degrees Fahrenheit
[°F]
[°C]
Wet bulb
temp
Indicates the temperature setting in at the
interface of a wet surface and a gas
gushing past in:
• degrees Celsius
• degrees Fahrenheit
[°F]
[°C]
Frost point
temp
Indicates the temperature at which the
current partial water vapour pressure
equals the saturated vapour pressure and
ice starts to form in:
• degrees Celsius
• degrees Fahrenheit
[°F]
[kg/m3]
Air density
Indicates the mass of air in proportion to a
certain volume in:
• kilograms per cubic metre
• pounds per cubic foot
[lb/ft3]
[g/kg]
Saturation
ratio
Indicates the relative mass ratio of
ambient air saturated with humidity in the
total mass in:
• grams per kilogram
• grains per pound
• parts per million
[gr/lb]
[ppm]
[g/kg]
Mixing ratio
Indicates the mass of water vapour in
proportion to the mass of dry gas in:
• grams per kilogram
• grains per pound
• parts per million
[gr/lb]
[ppm]
[g/kg]
Mass frac
w-vapour
Indicates the mass of water vapour in
proportion to the mass of humid gas in:
• grams per kilogram
• grains per pound
• parts per million
[gr/lb]
[ppm]
[ft3/h]
Norm vol
flow
Converts the measured volumetric flow
employing the ideal gas law to standard
conditions (temperature and pressure).
The following standard conditions can be
set:
• DIN 1343: 0 °C/1013.25 mbar
• DIN ISO 2533: 25 °C/1013.25 mbar
• DIN 1945-1: 20 °C/1013.25 mbar
The following units can be selected:
• cubic feet per hour
• cubic feet per minute
• cubic feet per second
• cubic inches per hour
• cubic inches per minute
• cubic inches per second
• litres per minute
• cubic metres per hour
• cubic metres per minute
• cubic metres per second
[ft3/min]
[ft3/s]
[in3/h]
[in3/min]
[in3/s]
[l/min]
[m3/h]
[m3/min]
[m3/s]
[hPa]
Partial vap
pressure
Indicates the partial pressure of water in
its gaseous phase in a given volume of a
gas or gas mixture in:
• hectopascal
• pounds per square inch
[psi]
[%] Rel
humidity
Indicates the relative humidity as the ratio
of the partial water vapour pressure to the
saturated vapour pressure under
saturation conditions above water in per
cent.
[%]
Rel
humidity
techn.
Indicates the relative humidity as the ratio
of the partial water vapour pressure to the
saturated vapour pressure under
saturation conditions above ice in per cent
(only with temperatures below 0 °C).
[Unit] Measured
value Meaning