Schiltknecht MiniAir20 User manual

MiniAir20 with
MiniController MC20
Multi-channel Measuring Instrument
Operating Manual
Schiltknecht Messtechnik AG
Industriestr. 13, CH-8625 Gossau ZH
Tel. [phone], Fax [phone]
http: www.schiltknecht.com
email: [e-mail]

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Table of Contents
1 About This Document.......................................................................................5
1.1 Validity ............................................................................................................. 5
1.2 Notices and Symbols Used..............................................................................5
2 Safety and Foreseeable Misuse.......................................................................6
3 Product Description..........................................................................................7
3.1 Purpose............................................................................................................7
3.2 Scope of Supply...............................................................................................7
3.3 Power Supply...................................................................................................7
3.4 Display and Control Elements..........................................................................8
3.5 Connections and Interfaces .............................................................................8
4 Commissioning .............................................................................................. 10
5 Operation.......................................................................................................11
5.1 Key Functions................................................................................................11
5.2 Connecting Sensors.......................................................................................11
5.2.1 Supported Sensor Types ....................................................................... 12
5.3 Info and Status Bar........................................................................................13
5.4 Start Menu ..................................................................................................... 13
5.4.1 Measuring Profiles ................................................................................. 14
5.4.2 Activating and Exiting Profiles................................................................14
6 Setting the Measuring Instrument.................................................................. 15
6.1 Configuring..................................................................................................... 15
6.1.1 Settings..................................................................................................15
6.2 Memory Card and Functions.......................................................................... 16
6.2.1 Inserting or Removing the Card.............................................................17
6.2.2 Activating the Card.................................................................................17
6.2.3 Managing and Exporting the Card Contents..........................................17
6.2.4 Troubleshooting ..................................................................................... 17
7 Measuring......................................................................................................18
7.1 Activating Volume Measurement ................................................................... 18
7.2 Momentary Value Profile................................................................................ 18
7.2.1 Display of Measured Values ..................................................................18
7.2.2 Hold Function.........................................................................................19
7.2.3 Datalogger ............................................................................................. 19
7.3 Interval Measurement Profile.........................................................................21
7.3.1 Display of Measured Values ..................................................................21
7.3.2 Defined Interval Measurement...............................................................22
7.3.3 Free Interval Measurement.................................................................... 23
8 Processing Measuring Results....................................................................... 24
8.1 Printing...........................................................................................................24
8.2 Save...............................................................................................................25
8.2.1 Saving Measuring Results .....................................................................25
8.2.2 Extended Processing of Saved Data......................................................25
8.2.3 Exporting and Deleting Memory Data ....................................................27
8.3 Editing Logger Data....................................................................................... 28
9 Technical Data...............................................................................................29

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10 Care and Maintenance...................................................................................32
10.1 Cleaning.........................................................................................................32
10.2 Maintenance...................................................................................................33
10.3 Inspection / Revision at the Factory...............................................................33
11 Guarantee......................................................................................................34

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1 About This Document
•This operating manual is part of the product.
•Please read this document through carefully before using the instrument.
•The operating manual must be kept for later use.
Schiltknecht Messtechnik AG, October 2013
1.1 Validity
This manual corresponds to the state of the art at the time of going to print
and applies for the following instrument:
•Schiltknecht MC20
1.2 Notices and Symbols Used
Warning
Warning indicates a safety notice which, if ignored, can lead to material
damage or personal injury.
Information
This notice indicates items of information which are important for trouble-
free operation of the product.
List or step
•This symbol indicates a list or a step in a sequence of actions. If steps are
numbered, pay attention to the fixed order!
Result
•This symbol indicates the result of an action.

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2 Safety and Foreseeable Misuse
•Only use the MC20 as instructed in the operating manual. Any other use
can lead to material damage or personal injury.
•Always use the MC20 out of the vicinity of highly inflammable and/or
explosive materials. Its use in Ex-areas is prohibited!
•Avoid moisture, extreme temperatures, vibrations and shocks as well as
strong electromagnetic interference sources. These can considerably
impair the quality of the measurements or damage the instrument.
•Unauthorised modifications to the instrument can lead to malfunctions and
are prohibited for safety reasons.
•Send the instrument back to Schiltknecht Messtechnik when it has reached
the end of its life. We will arrange for its proper disposal.

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3 Product Description
3.1 Purpose
Applications and tasks:
•Measuring and setting air control systems
•Room climate measurement
•Measurement of air flow under field conditions
•Saving and printing measuring results
Measuring variables:
•Flow velocity
•Volumetric flow
•Temperature
•Relative humidity
3.2 Scope of Supply
MiniAir20 and MC20 were checked at the factory prior to delivery and left our
works in perfect condition. Please check the product for damages upon
receipt. Please contact us immediately if you discover any transport
damages.
The typical scope of supply includes:
•MC20 multi-channel measuring instrument
•MiniAir20 measuring sensor
•HygroAir20 humidity and temperature sensor
•Charger/power supply unit 110/230 V
AC
•microSD card
•Operating manual
•Instrument accessories
3.3 Power Supply
The power is supplied by a built-in battery in the instrument. The power
supply unit/charger for connection to 110/230 V
AC
is included in the scope of
supply.

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3.4 Display and Control Elements
3.5 Connections and Interfaces
display – shows measuring
channels (max. four)
or menu functions
Enter/main menu
navigation down
navigation up
back/dialog menu
on/off
status bar
info bar
protective case with magnetic
holder on the back
3. IR interface/
loudspeaker 4. Mini-USB
port 5. microSD-
slot
1. flow
measurement 2. temperature
/humidity

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1. Flow
Connect the flow sensor to the five-pole socket. Suitable sensor types are
listed in chapter 5.2.1.
2. Temperature/humidity
Connect the temperature/humidity sensor to the eight-pole socket.
3. Infrared (IR) interface
Transfer of measuring results to the log printer. The printer does not belong
to the instrument’s scope of supply.
4. Mini-USB port for power supply unit
For charging the battery or for mains operation of the instrument.
5. Slot for microSD cards
Slot for microSD card for saving and logging measured values. The card is
part of the instrument’s scope of supply.
•Please observe the instructions in chapter 6.2 for trouble-free operation
of the instrument.

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4 Commissioning
•Charging the battery
Only use the enclosed power supply unit and charging cable to charge the
battery. Incompatible power supply units can damage the instrument!
Connect the power supply unit to the MC20 and charge the battery for about
eight hours before using for the first time. The instrument is then ready for
operation and can be used.
•Charging controller
The instrument is equipped with a charging controller.
This detects automatically whether the battery needs
recharging. An acoustic warning signal is sounded if
the battery capacity is too low. The charging process is
displayed graphically. The charging controller ends the
process automatically when the battery is fully
charged.
The battery is built into the MC20 and is designed for
long life.
Please never carry out any unauthorised work on the battery or the
instrument. This could cause irreparable damage to the instrument!

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5 Operation
5.1 Key Functions
Switching on/off
Switch on: press once briefly.
To switch off: Press key briefly: Instrument displays Switch off
mode. Confirm the Switch off instrument menu item with the
Enter key. Switch off automatically after a set time can be
activated optionally. Setting range: 01-99 min.
Functions
The Enter/main menu
key had two functions:
•Confirm inputs and activate menus or menu items (Enter
function).
•Direct selection of main menu (instrument configuration) by
pressing the key in an active measuring profile.
The back/dialog menu key has two functions:
•Cancel or exit selected settings and menu items
(back function).
•Direct access to the dialog menu (configuration and settings)
after instrument start or out of an active measuring profile
(process values, exit measurement).
Navigation
•
Navigate between individual menu items with down and up.
The order of the displayed channels in the active measuring
profile can also be changed.
•Enter values with the keys (numbers 0-9).
5.2 Connecting Sensors
MC20 offers sensor sockets for flow measurement and for humidity and
temperature measurement. The flywheel sensors of the MiniAir20 and
MiniWater20 series are supported for flow measurements in air and water.
These are supplemented by a combined humidity and temperature sensor.
•Connect the sensor plug to the instrument socket.

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•Turn on the instrument. The probes must not be connected or
disconnected when instrument is powered on.
The MiniAir/Water20 sensors are recognised automatically and the sensor
type is displayed in the Start menu (chapter 5.4).
5.2.1 Supported Sensor Types
Sensor type and measuring range Brief display in the Start menu
MiniAir20 Micro Air 0-20m/s Micro 20m/s Air
MiniAir20 Micro Air 0-40m/s Micro 40m/s Air
MiniWater20 Micro Water 0-5m/s Micro 5m/s Water
MiniWater20 Micro Water 0-10m/s Micro 10m/s Water
MiniAir20 Mini Air 0-20m/s Mini 20m/s Air
MiniAir20 Mini Air 0-40m/s Mini 40m/s Air
MiniWater20 Mini Water 0-5m/s Mini 5m/s Water
MiniWater20 Mini Water 0-10m/s Mini 10m/s Water
MiniAir20 Macro Air 0-20m/s Macro 20m/s Air
MiniAir20 Macro Air 0-40m/s Macro 40m/s Air
MiniAir20 Micro Air 0-20m/s Steel 140°C Micro 20m/s Air 140°C
MiniAir20 Micro Air 0-40m/s Steel 140°C Micro 40m/s Air 140°C
MiniAir20 Mini Air 0-20m/s Steel 140°C Mini 20m/s Air 140°C
MiniAir20 Mini Air 0-40m/s Steel 140°C Mini 40m/s Air 140°C
MiniAir20 Macro Air 0-20m/s Steel 140°C Macro 20m/s Air 140°C
MiniAir20 Macro Air 0-40m/s Steel 140°C Macro 40m/s Air 140°C
MiniAir20 Micro Air 0-20m/s Steel 250°C Micro 20m/s Air 250°C
MiniAir20 Micro Air 0-40m/s Steel 250°C Micro 40m/s Air 250°C
MiniAir20 Mini Air 0-20m/s Steel 250°C Mini 20m/s Air 250°C
MiniAir20 Mini Air 0-40m/s Steel 250°C Mini 40m/s Air 250°C
Humidity/temperature sensor ---
The humidity and temperature sensor is recognised automatically and
delivers measured values immediately. There is no status display here
because only one suitable sensor type can be used.

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5.3 Info and Status Bar
The info bar is at the top of the display and is
displayed constantly after the instrument has been
started. Displays:
•Battery capacity – battery icon full --- depleted
•Battery charging – battery icon flashes
•SD card icon when microSD card is inserted
•Hold display when function is activated
•Printer icon when a log measurement is being
printed
The status bar is at the bottom of the display and is
shown when a measuring profile or menu is activated.
Displays:
•Date/time in all profiles/menus
•Info configuration settings in the dialog menu
•Actual value or Interval measurement – active measuring profile
•Log ACTIVE or Log STOP – datalogger on/off
•File icon and name when searching and displaying saved measuring
results
5.4 Start Menu
The Start menu is the central selection area for instrument functions and
instrument information. The Start menu is displayed with the following menu
items on starting the instrument:
display sensor type
Info bar
measuring profile Actual value
measuring profile Interval
me
asurement

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•Display sensor type:Supported sensors (Table 5.2.1) are displayed
graphically and with their abbreviated name. The message Sensor type
not recognised is displayed for incompatible sensors.
5.4.1 Measuring Profiles
Two profiles are set up for different measuring requirements:
•Actual value:Continuous measurement and display of the recorded
measuring variables (chapter 7.2).
•Interval measurement:Recording of average values over predefined
or free intervals of time (chapter 7.3).
5.4.2 Activating and Exiting Profiles
Status: Start menu
Open the desired profile with and activate it with .
Exit a menu with Exit measurement
and confirm with .
Start menu is displayed.

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6 Setting the Measuring Instrument
Instruments settings can be made or changed on the MC20 from the Start
menu.
6.1 Configuring
The instrument is configured in the Dialog menu.
Activating and exiting the Dialog menu
Status: Start menu
Press Dialog menu
Back to the Start menu with
Menu items
•Info – display instrument data and serial numbers.
•Settings – see chapter 6.1.1.
•Diagnose – display instrument-internal statistical values.
•Scan – Manage saved measuring results: Display,
print and delete individual data records.
•Recreate memory – create memory locations on microSD card.
Warning! Saved data are deleted (details in chapter 6.2.).
•Import file – import text file as header for saving and printing
6.1.1 Settings
Set units, volume measurement, time/date and other parameters.
Status: Dialog menu
Open and activate Settings.
Sub-menus
•Units – change dimension of measuring
variables.
Measuring variable Dimensions
Temperature (air) °C, °F
Volume (flow) m
3
/h, l/s, m
3
/s
Air-flow m/s, km/h

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•Volume meas. – Volume measurement to determine the flow in
ventilation systems or pipes. This function must be adapted manually.
Data for the Shape and Diameter are required.
Status: Volume meas.
1. Define Shape: circular or rectangle.
2. Enter Diam. or Height/width, setting range 000-
999 mm.
Make inputs and confirm with . The
cursor automatically jumps to the next digit.
Deactivate channel
Set Diam. to 000 mm and confirm.
•Set Time/Date.
•Language – select German or English.
•Sound – activate alarm and key tones.
•Display – set energy saving settings and zoom (large display
measured values.
•Bluetooth SMART – factory-internal function
•Factory Settings – Attention!
This command deletes all manually made settings and restores the as-
delivered state of the instrument!
6.2 Memory Card and Functions
The Datalogger and Save instrument functions are only available in
connection with an inserted microSD card. The card serves the purpose of
an internal memory medium. Please observe the following instructions for
trouble-free operation:
•We recommend the use of microSD (HC) cards with up to 4 GB memory
capacity. These are fully supported by the instrument.
•No guarantee is given for the trouble-free use of memory sizes 8 to
16 GB. There may be some incompatibility here depending on the
manufacturers. However, this will not damage the instrument.
•The use of cards with 32 GB memory size is prohibited. These are not
supported by the instrument.

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6.2.1 Inserting or Removing the Card
Before inserting or removing the card, switch off the instrument! This
ensures that the card is recognised correctly or that all data are saved:
6.2.2 Activating the Card
microSD cards must be activated before using for the first time. To do this,
open the Create new memory function in the Dialog menu and confirm
the Warning: All measurements will be deleted with Yes. 100 fixed
memory locations for measuring results are created on the card. The card
icon appears in the info bar.
Attention:
Existing memory contents are deleted when the function is selected.
If the card has already been activated, only use this function if the memory
contents are to be deleted completely!
6.2.3 Managing and Exporting the Card Contents
Select the Scan function in the Dialog menu. This manages saved
measuring results: display, print and delete individual data records.
microSD cards with 1 GB capacity accommodate at least 1,000,000 logger
data records and max. 100 memory measurements. A card size of 1-2 GB
is sufficient for standard applications.
For Data export, switch off the instrument, remove the card and connect to
a notebook or PC with a card reader. Copy the log data into the target
directory.
6.2.4 Troubleshooting
If card errors occur (instrument hangs up), remove the card and restart the
instrument. Take the incompatible card out of use!

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7 Measuring
There is a choice of two profiles for measuring tasks:
Actual value: For ad-hoc measurements or rapid and overview measurements
under field conditions. For logging processes in which peaks are also to be
recorded.
Interval measurement: For average value measurements over a defined time
period, series measurements, log measurements.
7.1 Activating Volume Measurement
Volume measurement is deactivated at the factory and must be activated
and/or adapted manually in the Dialog menu before starting a measuring
job. Volume measurement is required to determine the flow in ventilation
systems or pipes. See chapter 6.1.1 for instructions for activation or
adaptation.
7.2 Actual Value Profile
In the Actual value profile, the recorded measuring variables are measured
continuously. The Datalogger, Save and Print functions are available for
processing and visualising the values (chapter 8 Processing Measured
Values).
Prerequisites:
1 Connect sensor - chapter 5.2.
2 Activate profile - chapter 5.4.2.
7.2.1 Display of Measured Values
Measured values and units are displayed continuously in black.
flow velocity
eingestellte Zeitbasis
humidity
temperature
deactivated field (volume measurement, chapter 7.1)
min./max. values

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If no sensor is connected for one/several channels, the corresponding
fields remain grey.
The desired order can be set by pressing the keys in
repeatedly. The measured value shown at the top is the
control variable. This is always displayed also in the main menu or
context menu for continuous visual control.
7.2.2 Hold Function
The Hold function can be used for situational holding of measured values.
Setting
Status: Profile Actual value
1. Set sorting of the channels (see chapter 7.2.1) so
that the control variable is at the top of the
display for faster recording.
2. Press to go to the Shortcut menu.
3. With call Hold and activate at the right
moment with . Hold display flashes in the
info bar, measured values are held.
Delete values
1. Press to go to the Shortcut menu.
2. Select Hold and deactivate with . Instrument switches back to
profile, the display in the info bar goes out.
Save values
See chapter 8.2.1.
7.2.3 Datalogger
Datalogger enables the recording of momentary values in start-stop
measurement with adjustable interval (time span between two recordings).
At least 1,000,000 data records can be logged (card memory with 1 GB).

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Measuring variables
Datalogger records all measuring variables for which
•a suitable sensor is plugged in (chapter 5.2.1)
•an optional channel is activated (volume measurement, chapter 7.1)
Prerequisites:
•microSD card inserted and activated (chapter 6.2).
•Actual value profile activated (chapter 7.2).
Setting
Status: Profile Actual value
1. Press in profile
2. Select Datalogger menu item, confirm with .
3. Call Interval function and use keys to
enter the desired time span between two
recordings. Setting range 1-999 s
Start/end recording
1. Select Start Logger and activate with . The
status bar shows Log ACTIVE and the continuous
time. The menu can be closed after starting the
logger. The measured values are still recorded
until the datalogger is ended.
2. To end, call Stop Logger and confirm with .
Then Log STOP and the measured time are
displayed in the status bar.
If the logger is not stopped manually, recording takes place continuously
until the instrument is switched off or the battery is depleted. Log data are
retained in this case.
Main Menu