TESTO 435 User manual

testo 435
Multifunction measuring instrument
Instruction manual en
Contents
General notes ......................................................2
1. Safety instructions ..............................................4
2. Intended purpose ................................................5
3. Product description ............................................6
3.1 Display and control elements ..........................................6
3.2 Interfaces ......................................................................8
3.3 Voltage supply ................................................................8
4. Commissioning ..................................................9
5. Operation ..........................................................10
5.1 Connecting a probe ....................................................10
5.2 Switching on/off ..........................................................10
5.3 Display light ................................................................11
6. Setting the instrument ......................................12
6.1 Configuration menu ......................................................12
6.1.1 Profile ............................................................................12
6.1.2 Units ..............................................................................13
6.1.3 Device ............................................................................13
6.1.4 Probe ............................................................................15
6.1.5 Language ......................................................................18
6.2 Main menu ..................................................................18
6.2.1 Memory (435-2/-4 only) ................................................20
6.2.2 Measuring program (435-2/-4 only) ..............................21
6.2.3 Mean ............................................................................22
6.2.4 P = 0 (435-3/-4 only) ....................................................22
6.2.5 Calculation ....................................................................23
6.2.6 Parameter/Area ............................................................24
6.2.7 Cyclical Print (435-1/-3 only) ..........................................25
7. Measuring ........................................................26
8. Care and maintenance ......................................29
9. Questions and answers ....................................30
10. Technical data ..................................................31
11. Accessories/spare parts ..................................33

General notes2
General notes
This chapter provides important advice on using this documentation.
The documentation contains information that must be applied if the product is
to be used safely and efficiently.
Please read this documentation through carefully and familiarise yourself with
the operation of the product before putting it to use. Keep this document to
hand so that you can refer to it when necessary.
Identification
Representation Meaning Comments
Warning advice: Warning! Read warning advice carefully and take the precautionary measures
indicated! Serious physical injury could occur if you do not take the
precautionary measures indicated.
Warning advice: Caution! Read warning advice carefully and take the precautionary measures
indicated! Slight physical injury or damage to equipment could occur
if you do not take the precautionary measures indicated.
Note Offers helpful tips and information.
, 1, 2 Objective Denotes the objective that is to be achieved via the steps described.
Where steps are numbered, you must always follow the order given!
Condition A condition that must be met if an action is to be carried out as
described.
, 1, 2, ... Step Carry out steps. Where steps are numbered, you must always follow
the order given!
Text Display text Text appears on the instrument display.
Control button Press the button.
Function button Press the button.
- Result Denotes the result of a previous step.
Cross-reference Refers to more extensive or detailed information.
Button

General notes 3
Short form
This document uses a short form for describing operating steps (e.g. calling up
a function).
Example: Calling up the “Instrument data” function
Short form: Device Inst.data .
(1) (2) (3) (4)
Steps required:
1Press / to select the Device function.
2Confirm selection with .
3Press / to select the Inst.data function.
4Confirm selection with .
OK
OK
OKOK
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1. Safety instructions
This chapter gives general rules which must be followed and observed if the
product is to be handled safely.
Avoid personal injury/damage to equipment
Do not use the measuring instrument and probes to measure on or near live
parts.
Never store the measuring instrument/measuring cells together with solvents
and do not use any desiccants.
Product safety/preserving warranty claims
Operate the measuring instrument only within the parameters specified in the
Technical data.
Always use the measuring instrument properly and for its intended purpose.
Do not use force.
Do not expose handles and feed lines to temperatures in excess of 70 °C
unless they are expressly permitted for higher temperatures. Temperatures
given on probes relate only to the measuring range of the sensors.
Open the instrument only when this is expressly described in the
documentation for maintenance or repair purposes.
Carry out only the maintenance and repair work that is described in the
documentation. Follow the prescribed steps when doing so. For safety
reasons, use only original spare parts from Testo.
Ensure correct disposal
Take faulty rechargeable batteries/spent batteries to the collection points
provided for them.
Send the product back to Testo at the end of its useful life. We will ensure
that it is disposed of in an environmentally friendly manner.
1. Safety instructions4

Instruments with radio module 915.00MHz FSK
Warning: Changes or modifications not expressly approved by the party responsible for compliance could void
the user's authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part
15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following measures:
· Reorient or relocate the receiving antenna.
· Increase the separation between the equipment and receiver.
· Connect the equipment into an outlet on a circuit different from that to which the receiver is needed.
· Consult the dealer or an experienced radio/TV technician for help.
Operation is subject to the following two conditions:
· this device may not cause harmful interference, and
· this device must accept any interference received, including interference that may cause undesired operation.
2. Intended purpose
This chapter gives the areas of application for which the product is intended.
Use the product only for those applications for which it was designed. Ask
Testo if you are in any doubt.
testo 435 is a compact, multifunction measuring instrument for measuring
temperature, humidity and flow rate.
The product was designed for the following tasks/applications:
· Measuring room climate
· Regulating and inspecting ventilation and air-conditioning installations
· Measuring the pressure dew point in compressed air systems
· Assessing the quality of room air with the help of the IAQ probe
The product should not be used in the following areas:
· Areas at risk of explosion.
· Diagnostic measurements for medical purposes.
1. Safety instructions 5
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3. Product description
This chapter provides an overview of the components of the product and their
functions.
3.1 Display and control elements
Overview
Infrared, USB interface
Display (light can be activated)
Control buttons
Rear: Battery and radio module compartment, holding
magnets
Strong magnets
Damage
to other instruments!
Keep a safe distance from products which
could be damaged by magnetism (e.g.
monitors, computers, pacemakers, credit
cards).
Probe socket(s)
Button functions
Button Functions
Function button (3x): The function depends on the button assignment
at the time
Change display of the 1st reading line
In configuration mode: Increase value, select option
Change display of the 2nd reading line
In configuration mode: Decrease value, select option
Print data
435-1/-3 only: If the Cyclical Printing function is activated, the
programmed measuring program is started.
Switch instrument on, switch display light on/off;
switch instrument off (press and hold)
3. Product description6

Function buttons (Function dependant on profile and setting)
Button Functions
Open (main) menu
Enter confirmation
Cancel
/ Hold value/display current measurement value
Reset max./min. values to current measurement value
Open menu item “Multi-point mean calculation“
Open menu item “Measuring program“ (435-2/-4 only) 435>
Start test series (435-2/-4 only)
End test series (435-2/-4 only), End Cyclical Print (435-1/-3 only)
Save values (435-2/-4 only)
Activate “Turb“ test series (435-2/-4 only with attached turbulence probe)
Open menu item “Area”
Zero internal pressure sensor (435-3/-4 only)
Important displays
Display Meaning
Battery capacity (only for operation by battery/rechargeable battery):
· 4 segments in the battery symbol are lit: Instrument battery is fully charged
· No segments in the battery symbol are lit: Instrument battery is almost spent
(flashing) Print function: Data are sent to the printer
435-3/-4 only: Measurement channel differential pressure (internal sensor)
, Measurement channel no.: Channel 1, channel 2.
If a measurement channel is a radio channel, the radio symbol lights up as well as the
measurement channel no.
P=0
Area
Turb
Save
End
Start
Measp
Mean
Reset
ACTHold
ESC
OK
3. Product description 7
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3.2 Interfaces
Infrared interface
Measurement data can be sent to a Testo printer via the infrared interface on
the head of the instrument.
USB interface
The mains unit (accessory part) can be connected to the head of the
instrument via the USB interface to power the instrument.
Instruments with a memory: Measurement/instrument data can be exchanged
with a PC via the USB interface.
Probe socket(s)
Plug-in measuring probes can be connected via the probe socket(s) on the
base of the instrument. The instrument is a HighPower device, possibly an
additional USB-Hub is required!
Radio module (accessory part)
Radio probes may only be used in countries in which they have been Type
Approved (see application information of the radio probe).
Up to three radio probes can be connected via the radio module.
3.3 Voltage supply
Voltage is supplied via three mignon batteries (included in delivery) or
rechargeable batteries or through a mains unit (accessory part). It is not
possible to charge rechargeable batteries in the instrument.
When operating the instrument with the mains unit, insert batteries in order
to avoid switching off the instrument in case of a power interruption.
3. Product description8

4. Commissioning
This chapter describes the steps required to commission the product.
Inserting
batteries/rechargeable batteries and a radio module (accessory
part):
1Undo the two screws on the rear of the instrument and lift off the battery
compartment cover.
2Insert batteries/rechargeable batteries (3x mignon) into the battery
compartment. Observe the polarity!
3Push the radio module (accessory part) into the radio module
compartment until it engages in place. Note the guide groove.
4Replace the battery compartment cover, press down and secure by
tightening the two screws.
4. Commissioning 9
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5. Operation
This chapter describes the steps that are executed frequently when using the
product.
5.1 Connecting a probe
Plug-in probes
Plug-in probes must be connected before the measuring instrument is
switched on so that they are recognised by the instrument.
Insert the connector of the probe into the probe socket of the measuring
instrument.
Radio probes
Radio probes may only be used in countries in which they have been Type
Approved (see application information of the radio probe).
A radio module (accessory part) is required for the use of radio probes. The
radio module must be connected before the measuring instrument is switched
on so that it is recognised by the measuring instrument.
Each radio probe has a probe ID (identification number) which must be set in
configuration mode.
See chapter PROBE, p. 15.
5.2 Switching on/off
Switching
the instrument on:
Press .
- Measurement view is opened: The current reading is displayed, or
---- lights up if no reading is available.
Instruments with a memory: The activated location is displayed
(topmost line).
-oor-
The instrument is switched on for the first time, a reset was carried out or
the power supply was interrupted for a lengthy period of time:
- The Language function is opened.
See the chapter LANGUAGE, p. 18.
5. Operation10

Switching
the instrument off:
Press and hold (for approx. 2s) until the display goes out.
5.3 Display light
Switching
the display light on/off:
The instrument is switched on.
Press .
5. Operation 11
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6. Setting the instrument
This chapter describes the steps that are required in order to adapt the
measuring instrument for specific measuring tasks.
6.1 Configuration menu
The basic settings for the measuring instrument are performed in the
configuration menu.
Opening
the configuration menu:
The instrument is in measurement view.
Press and hold (approx. 2s) until config. is displayed.
Press to go one menu level back. To leave the configuration menu,
press several times until the instrument changes to measurement view.
6.1.1 Profile
The instrument has predefined measurement profiles that are tailored to
specific areas of application.
The profile setting influences the following points in measurement mode:
· Assignment of the function buttons
· Number of predefined functions
· Structure of the main menu
All functions are available in the standard profile. In the application-specific
measurement profiles, the available functions are reduced to only those that are
needed to ensure speedier access.
Setting
a profile:
The configuration menu is open, config. is displayed.
1Profile .
2Select the desired profile with / and confirm with .
OK
OK
ESC
ESC
6. Setting the instrument12

6.1.2 Units
Predefined systems and individual setting options:
Parameter ISO system US system Individual setting options
Temperature °C °F °C, °F
Pressure hPa inchH2O mbar, Pa, hPa, kPa, inchH2O
Velocity m/s fpm m/s, fpm
Volumetric flow rate m³/h ft³/min m³/h, l/s, ft³/min
Length mm inch mm, inch
Power kW BTU/h kW, BTU/h, TONS
Setting
units:
The configuration menu is open, config. is displayed.
1Units .
2Press / ISO/US (to set the system) or a parameter (to set
individually) and confirm with .
3Set the system of units or the desired unit with / and confirm
with .
6.1.3 Device
Instrument data
Displaying
instrument data:
The configuration menu is open, config. is displayed.
1Device Inst.data .
- The firmware version and the serial number of the instrument are
displayed.
Date/ Time
Setting
the date/time:
The configuration menu is open, config. is displayed.
1Device date/time .
2Use / to set the value for year and confirm with .
3Set the other values as described in step 2.
OK
OKOK
OKOK
OK
OK
OK
6. Setting the instrument 13
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Battery type
To ensure that the battery capacity is displayed correctly, the battery type used
must be set.
Setting
the battery type:
The configuration menu is open, config. is displayed.
1Device Bat-type .
2Press / Battery or ReBa and confirm with .
Auto OFF
If Auto OFF is switched on, the instrument switches itself off automatically after
10min if no button is pressed. Exception: Cyclical printing (instruments without
a memory) or a measuring program (instruments with a memory) is active.
Switching
Auto OFF on/off:
The configuration menu is open, config. is displayed.
1Device Auto OFF .
2Press / to select On or Off and confirm with .
Reset
When a reset is carried out, the instrument is reset to the default settings, all
settings/ data are deleted. Exception: Language, Date/Time.
Resetting:
The configuration menu is open, config. is displayed.
1Device reset .
2Reset with or cancel the reset with .
Setting min. / max. printing function
If pr MinMaxAuto is activated, minimum and maximum values are also printed
with the measurement readings.
Switching
off pr MinMax:
The configuration menu is open, Config. is displayed.
1Device pr MinMax .
2Choose On or Off with / and confirm with .
OK
OKOK
ESCOK
OKOK
OK
OKOK
OK
OKOK
6. Setting the instrument14

K-factor
The querying of the K-factor (correction factor for areas) when entering the
parameter „Area“.can be switched on/off.
See chapter PARAMETER /AREA, p. 24.
Switching
K-ffactor on/off:
The configuration menu is open, config. is displayed.
1Device K-factor .
2With / , select On or Off and confirm with .
Num holes
The querying of the number of holes (number of measurement points) in the
calculation of a multi-point mean value can be switched on/off. The number of
holes is required to allocate the readings to the number of measurement points
for later evaluation via the PC software.
See Chapter MEAN, p. 22 and MEASURING, p. 26.
Switching
number of holes on/off:
The configuration menu is open, config. is displayed.
1Device Num holes .
2With / , select On or Off and confirm with .
6.1.4 Probe
RadioC
Radio probes may only be used in countries in which they have been Type
Approved (see application information of the radio probe).
A radio module (accessory part) is required for the use of radio probes. The
instrument can establish a connection with a maximum of three radio probes.
Each radio probe has a probe ID (RF ID). This consists of the last 3 digits of the
serial no. and the position of the slide switch (Hor L) in the radio probe.
Setting
up a radio probe:
A radio module (accessory part) is inserted in the instrument.
See chapter COMMISSIONING, p. 9.
The configuration menu is open, config. is displayed.
The radio probe is switched on and the transfer rate is set to 2 readings
per second (see the advice on using the radio probe).
OK
OKOK
OK
OKOK
6. Setting the instrument 15
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1Probe RadioC .
2Press / to select the desired channel no. for the radio probe (P. 1 ,
P. 2 or P. 3 ) and confirm with .
- The instrument searches for switched-on radio probes in the receiving
range.
- The probe IDs of the radio probes found are displayed.
If no radio probes were found, this may be because of the following:
· The radio probe is not switched on or the battery of the radio probe is
spent.
· The radio probe is outside the range of the measuring instrument.
· Sources of interference are influencing the radio transmission (e.g.
reinforced concrete, metal objects, walls or other barriers between
transmitter and receiver, other transmitters of the same frequency,
strong electromagnetic fields).
If necessary, rectify the possible causes of the fault in radio
transmission.
Alternatively, the probe ID can also be entered manually.
Press / to enter the probe ID.
3Press / to select the probe that is to be assigned to the chosen
channel no.
4Assign the radio probe to the chosen channel no. with or exit the
function with , without changing the probe configuration.
Humidity probe calibration (435-2/-4 only)
This function is only available if a humidity probe is plugged in.
The calibration values can be reset to the default settings (Reset). A 2-point
calibration can be performed.
Resetting
the calibration values:
The configuration menu is open, config. is displayed.
1Probe Calibr. .
2Press / to select Reset and confirm by pressing twice.
- The calibration values are reset to the default settings.
OK
OKOK
ESC
OK
MAN
OK
OKOK
6. Setting the instrument16

Calibrating:
The configuration menu is open, config. is displayed.
1Probe Calibr. .
2Press / to select calibration point P1 or P2 and confirm by
pressing twice.
3Put the humidity probe into the reference medium and wait for the
equalisation period to elapse.
- The current humidity reading and the calibration point (nominal value) are
displayed.
4Start the calibration menu with .
5Save calibration with or cancel calibration with .
P internal (435-3/-4 only)
The internal pressure sensor can be switched on/off.
Switching
the internal pressure sensor on/off:
The configuration menu is open, config. is displayed.
1Probe P intern .
2Press / On or Off and confirm with .
Te-Type
The probe characteristic curves stored in the instrument can be set for the
probe type used.
Setting
probe type:
The configuration menu is open, Config. is displayed.
1Probe Te-Type .
2Select the desired probe type with / and confirm with .
Adjustment
The function is only available when an absolute pressure probe is attached.
The display value for the measurement of abolute pressure.
Carrying
out adjustment:
The configuration menu is open, config. is displayed.
1Probe Adjustm. .
2With / , set the adjusted value and confirm with .
OK
OKOK
OK
OKOK
OK
OKOK
ESCOK
OK
OK
OKOK
6. Setting the instrument 17
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6. Setting the instrument18
Pressure
The function is only available when an absolute pressure probe is attached.
You can set whether the absolute air pressure (measured with an absolute
pressure probe) or the barometric air pressure (calculated from the measured
absolute pressure and the input of the altitude above sea level).
For the input of abs alt. for the calculation of the barometric air pressure, see
chapter PARAMETER /AREA, p. 24.
Setting measurement parameter:
The configuration menu is open, config. is displayed.
1Probe Pres. .
2With / , select the desired measurement parameter and confirm
with .
6.1.5 Language
Setting
the language:
The configuration menu is open, config. is displayed.
1Language .
2Select the desired language with / and confirm with .
6.2 Main menu
Settings by which the measuring instrument can be adapted to the particular
measuring task are performed in the main menu.
The instrument has predefined measurement profiles that are tailored to
specific areas of application.
See the chapter PROFILE, p. 12.
The profile setting influences the number of available functions and the
structure of the main menu.
The method described in this chapter for calling up the functions in the main
menu relates to the Standard profile setting. If a different profile is set, the
method for calling up individual functions may change or the function may
not be available in that particular profile. Some functions are only available
when a probe is connected or a wireless probe is switched on and
registered.
OK
OK
OK
OKOK

6. Setting the instrument 19
Menu overview testo 435-1/-3
Profile menu items Function
Standard P = 0 (nur 435-3) Zero internal pressure sensor
Area Set form, cross-section area, K-factor
Calc. De/activate volume flow, differential temperature, dewpoint
temperature, psychrometric temperature calculation;
435-3 additionally; De/activate flow calculation
Parameter Set reference pressure, abs. altitude;
435-3 additionally; Set reference temperature/humidity.
cyc. Print De/activate cycle printing
Ductm. P = 0 (nur 435-3) Zero internal pressure sensor
Velocity (nur 435-3) De/activate flow calculation
Vol. De/activate volume flow calculation
Parameter (nur 435-3) Set reference pressure, abs. altitude, P-factor, Set reference
temperature/humidity.
Pres. (nur 435-1) Set reference pressure
cyc. Print De/activate cycle printing
Menu overview testo 435-2/-4
Profile menu items Function
Standard Memory Info, Activate/set measurement locality, print report, delete store
Meas. Prog Set/ de/activate measurement program
Mean Time/point mean calculation
Calc. De/activate volume flow, differential temperature, dewpoint tempera-
ture, psychrometric temperature, Enthalpy calculation; Set heat
transfer coefficient alpha
435-3 additionally; De/activate flow calculation
P = 0 (nur 435-4) Zero internal pressure sensor
Parameter Set reference pressure, abs. altitude, Set area form/cross-section;
435-4 additionally: Set reference temperature/humidity.
Ductm. P = 0 (nur 435-4) Zero internal pressure sensor
Memory Info, Activate/set measurement locality, print report, delete store
Velocity (nur 435-4) De/activate flow calculation
Vol. De/activate volume flow calculation
Parameter Set reference pressure, abs. altitude
435-4 additionally: Set reference temperature/humidity.
IAQ Mean Time mean calculation
Pres. Set reference pressure
Memory Info, Activate/set measurement locality, print report, delete store
abs alt. Set abs. altitude
P = 0 (nur 435-4) Zero internal pressure sensor
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Opening
the main menu:
The instrument is in measurement view.
Press .
-Menu is displayed.
Press to go one menu level back. To leave the main menu, press
several times until the instrument changes to measurement view.
6.2.1 Memory (435-2/-4 only)
Info
The free memory space is displayed
Location
The active location can be changed. Up to 99 locations can be created. The
numerical location designations (01-99) can be changed into any text (max.
10 characters) using the PC software.
Changing
an active location:
The main menu is open, Menu is displayed.
1Memory Location .
2Press / to select the location to be activated and confirm with
.
Protocol
Saved measurement protocols can be printed out on a Testo printer (accessory
part) via the infrared interface.
Printing
a measurement protocol:
The main menu is open, Menu is displayed.
1Memory Protocol .
2Press / to select the measurement protocol that is to be printed.
3Press to start printing out the measurement protocol.
Delete
The entire memory with all measurement protocols can be cleared.
OKOK
OK
OKOK
ESC
ESC
6. Setting the instrument20