Testo 420 Operating Manual
testo 420 · Flow Hood
Instruction manual
2
1 Contents
1 Contents
1 Contents ................................................................................................... 3
2 Safety and the environment .................................................................... 4
2.1. About this document ........................................................................ 4
2.2. Ensure safety................................................................................... 5
2.3. Protecting the environment .............................................................. 5
3 Specifications .......................................................................................... 5
3.1. Use .................................................................................................. 6
3.2. Technical data ................................................................................. 6
3.2.1. Bluetooth module ................................................................................................ 6
3.2.2. General technical data ........................................................................................ 7
4 Product description ............................................................................... 10
4.1. Overview ....................................................................................... 10
4.1.1. Measurement setup ..........................................................................................10
4.1.2. Overview of testo 420 .......................................................................................11
5 First steps .............................................................................................. 12
6 Using the product .................................................................................. 14
6.1. Switching Bluetooth® on and off.................................................... 14
6.2. Settings for the measurement........................................................ 15
6.2.1. Damping (Gliding Average) ..............................................................................15
6.2.2. Hood Calibration ...............................................................................................15
6.2.3. Zeroing Interval (Automatic Zeroing) ................................................................16
6.3. Volume flow measurement setup .................................................. 16
6.4. Measuring ...................................................................................... 19
6.4.1. Volume flow measurement ...............................................................................19
6.4.2. Pitot tube measurement ....................................................................................19
6.4.3. Differential pressure measurement...................................................................19
6.5. Saving ........................................................................................... 20
6.6. Transferring measurement data to the PC .................................... 21
7 Maintaining the product ........................................................................ 22
7.1. Cleaning the instrument ................................................................. 22
8 Tips and assistance............................................................................... 22
8.1. Questions and answers ................................................................. 22
8.2. Accessories and spare parts ......................................................... 23
9 EC Declaration of Conformity ............................................................... 24
3
2 Safety and the environment
Representation
Explanation
Menu
2 Safety and the environment
2.1. About this document
Use
> Please read this documentation through carefully and
familiarize yourself with the product before putting it to use. Pay
particular attention to the safety instructions and warning advice
in order to prevent injuries and damage to the products.
> Keep this document to hand so that you can refer to it when
necessary.
> Hand this documentation on to any subsequent users of the
product.
Symbols and writing standards
Warning advice, risk level according to the
signal word:
Warning! Serious physical injury may occur.
Caution! Slight physical injury or damage to
the equipment may occur.
> Implement the specified precautionary
measures.
Note: Basic or further information.
1. ...
2. ...
Action: more steps, the sequence must be
followed.
> ... Action: a step or an optional step.
- ... Result of an action.
Elements of the instrument, the instrument
display or the program interface.
[OK]
Control keys of the instrument or buttons of
the program interface.
... | ... Functions/paths within a menu.
“...” Example entries
4
2.2. Ensure safety
> Do not operate the instrument if there are signs of damage at
the housing, mains unit or feed lines.
> Do not perform contact measurements on non-insulated, live
parts.
> Do not store the product together with solvents. Do not use any
desiccants.
> Carry out only the maintenance and repair work on this
instrument that is described in the documentation. Follow the
prescribed steps exactly. Use only original spare parts
from Testo.
> Dangers may also arise from the systems being measured or
the measuring environment: Note the safety regulations valid in
2.3. Protecting the environment
your area when performing the measurements.
> Dispose of faulty rechargeable batteries/spent batteries in
accordance with the valid legal specifications.
> At the end of its useful life, send the product to the separate
collection for electric and electronic devices (observe local
regulations) or return the product to Testo for disposal.
3 Specifications
3 Specifications
The testo 420 is used for volume flow measurements (main
application), Pitot tube measurements and pressure measurements
for air conditioning and ventilation systems. Thanks to its
interchangeable flow hoods, the testo 420 can be used for air inlets
and outlets of various sizes.
With the additional App (Android/iOS), the readings can be
conveniently displayed on a tablet or smartphone, and in addition a
measurement can be started, stopped and saved via the App.
5
3 Specifications
3.1. Use
3.2. Technical data
The use of the wireless module is subject to the regulations and
stipulations of the respective country of use, and the module may only
be used in countries for which a country certification has been granted.
The user and every owner has the obligation to adhere to these
regulations and prerequisites for use, and acknowledges that the resale, export, import etc. in particular in countries without wireless
permits, is his responsibility.
3.2.1. Bluetooth module
Feature Values
Bluetooth Range >20 m (free field)
Bluetooth type LSD Science & Technology Co., Ltd
L Series BLE module (08 May 2013) based
on TI CC254X chip
Qualified Design ID B016552
Bluetooth radio
class
Bluetooth company 10274
Class 3
Certification
Belgium (BE), Bulgaria (BG), Denmark (DK), Germany (DE),
Estonia (EE), Finland (FI), France (FR), Greece (GR), Ireland (IE),
Italy (IT), Croatia (HR), Latvia (LV), Lithuania (LT), Luxembourg
(LU), Malta (MT), Netherlands (NL), Austria (AT), Poland (PL),
Portugal (PT), Romania (RO), Sweden (SE), Slovakia (SK),
Slovenia (SI), Spain (ES), Czech Republic (CZ), Hungary (HU),
United Kingdom (GB), Republic of Cyprus (CY).
EFTA countries
Norway
Other countries
USA, Turkey, India and Hong Kong
6
Information from the FCC (Federal Communications Commission)
This instrument complies with part 15 of the FCC Rules. Its
commissioning is subject to the following two conditions: (1) This
instrument may not cause harmful interference and (2) this
instrument must be able to accept interference, even if this could
have undesired effects on the operation.
Changes
The FCC demands that the user be informed that any changes or
modifications to the instrument that are not explicitly approved by
Testo AG may void the user's right to use this instrument.
3.2.2. General technical data
Feature Values
Measurement
parameters
Measuring cycle 1/sec
Interfaces Probe interface Mini DIN
Measuring ranges Temperature: -20 to +60 °C / -4 to 140 °F
Temperature: °C / °F
Humidity: %RH / %rF / td°C / WB°C
Flow velocity : m/s / ft/min
Volume flow: m³/h / cfm / l/s
Pressure (absolute pressure): hPa / mbar / kPa
Pressure (differential pressure): Pa / hPa /
mbar / mmH
Micro USB
Humidity: 0 to 100% RH
Flow velocity: 0 to 14 m/s /
0 to 2750 ft/min
Volume flow: 40 to 4000 m³/h /
25 to 2300 cfm / 11 to 1100 l/s
Pressure (absolute pressure):
700 to 1100 hPa
Pressure (differential pressure): 120 to +120 Pa
O / inH2O
2
3 Specifications
7
3 Specifications
since
Feature Values
Resolution Temperature: 0.1 °C / 0.1°F
Humidity: 0.1% RH
Flow velocity: 0.01 m/s
Volume flow: 1 m³/h / 1 cfm
Pressure (absolute pressure): 0.1 hPa /
0.1 mbar / 0.01 kPa
Pressure (differential pressure): 0.001 Pa /
0.00001 hPa / 0.00001 mbar / 0.0001 mm
H2O / 0.000001 inH2O
Accuracy
(nominal temperatur
e 22°C/71.6°F)
Temperature: ±0.5 °C (0 to +70 °C) / ±0.8 °C
(-20 to 0 °C)
Humidity: ±1.8% RH +3% of m.v. at +22 °C
(5 to 80% RH) (longer high humidity application
can result in a temporary sensor drift)
Flow velocity: no accuracy specification
calculated variable
Volume flow 1: ±3% of m.v. +12 m³/h at
+22 °C, 1013 hPa (85 to 3500 m³/h)
±3% +7 cfm (50 to 2,100 cfm)
Error absolute pressure compensation:
±0.04% of m.v. / hPa deviating from 1013 hPa
Pressure (absolute pressure): ± 3 hPa
Pressure (differential pressure): ±2% of m.v.
+ 0.5 Pa (at 22°C, 1013 hPa)
Error absolute pressure compensation:
±0.04% of m.v. / hPa deviating from 1013 hPa
1
All accuracy specifications apply under laboratory conditions or with necessary
compensation (correction factor) with the standard hood 610x610 mm. Minimum
outlet size of 360x360 mm.
8
Loading...