TESTO 312-4 User manual
testo 312-4 · Pressure measuring instrument
Instruction manual
2
1 Contents
3
1Contents
1Contents ...................................................................................................3
2Safety and the environment....................................................................5
2.1. About this document ........................................................................5
2.2. Ensure safety...................................................................................6
2.3. Protecting the environment..............................................................6
3Specifications ..........................................................................................7
3.1. Use ..............................................................................................7
3.2. Technical data .................................................................................8
4Product description.................................................................................9
4.1. Overview..........................................................................................9
4.1.1. Control elements and connections...................................................................9
4.1.2. Display .........................................................................................................10
4.1.3. Menu overview...............................................................................................12
4.2. Basic properties.............................................................................13
5First steps ..............................................................................................14
6Using the product ..................................................................................15
6.1. Performing settings........................................................................15
6.1.1. Location .........................................................................................................16
6.1.2. Memory .........................................................................................................16
6.1.3. Instrument......................................................................................................18
6.1.4. Service .........................................................................................................19
6.1.5. Input .........................................................................................................21
6.1.6. Gas type ........................................................................................................23
6.2. Measuring......................................................................................23
6.2.1. Important information for pressure measurement...........................................23
6.2.2. Connection variations ....................................................................................24
6.2.3. Zeroing the display ........................................................................................26
6.2.4. Save readings/implement measurement program..........................................27
6.2.5. Print readings.................................................................................................28
6.2.6. Activate measuring functions .........................................................................28
6.3. Perform measurement procedures ................................................29
6.3.1. Pretest/main test, high pressure at water pipes .............................................29
6.3.2. Leak rate/usability after pressure drop ...........................................................31
1 Contents
4
7Maintaining the product ....................................................................... 33
8Tips and assistance .............................................................................. 34
8.1. Questions and answers ................................................................ 34
8.2. Accessories and spare parts......................................................... 34
2 Safety and the environment
5
2Safety 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
Representation Explanation
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.
Menu 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
2 Safety and the environment
6
2.2. Ensure safety
> Only operate the product properly, for its intended purpose and
within the parameters specified in the technical data. Do not
use any force.
> The objects to be measured or the measurement environment
may also pose risks: Note the safety regulations valid in your
area when performing the measurements.
> 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.
> Temperatures given on probes/sensors relate only to the
measuring range of the sensors. Do not expose handles and
feed lines to any temperatures in excess of 70 °C unless they
are expressly permitted for higher temperatures.
2.3. Protecting the environment
> 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
7
3Specifications
3.1. Use
The testo 312-4 is a handy pressure measuring instrument that was
developed specifically for use in heating system installations.
The main areas of use and measuring tasks are:
Gas pipes
• Performance of the pretest in acc. with DVGW-TRGI 2008
• Performance of the main test in acc. with
DVGW-TRGI 2008
• Determining the usability by means of pressure drop method
• Pressure regulation testing incl. recording readings up to 24 h
• Monitoring of gas connection pressure at gas meter
• Monitoring of gas flow pressure at gas meter
• Setting the nozzle pressure for setting gas burners/heaters
Water pipes
• Leak test of wastewater disposal lines in acc. with DIN EN 1610
• Performance of load tests up to 25 bar at drinking water
systems
Data transfer
• Printout via testo IR standard printer
• Data transfer to Easyheat PC software
The instrument offers the following characteristics:
• Measurement location management
• Data management via Easyheat software
• "On-site" printout of the measurement results via the testo
protocol printer
• Temperature measurement
• Wide range of probes and sensors can be connected so that
one instrument covers as many measuring tasks as possible
3 Specifications
8
3.2. Technical data
Characteristic Values
Measuring ranges and
accuracies
0 to 3 hPa: ±0.03 hPa
3 to 40 hPa: ±1.5 % of m.v.
41 to 200 hPa: ±2 hPa
Intrinsic leakage 0.3 % pressure drop from test
pressure over a period of 1 minute
Permissible media Air, non-aggressive gases
Voltage supply 9 V monobloc (6LR61), alkaline
manganese or 12 V DC mains unit
Sensor interface Round 8-pin plug
PC interface Serial, connection line 0409 0178
Printer interface Infrared
Measurement data
memory
approx. 25000 readings
Battery running time in
continuous operation
with internal pressure
sensor
30 h with alkali manganese at 25 °C /
77 °F
Sensor piezoresistive
Storage/transport
temperature
-20 to 70 °C/-4 to 158 °F
Operating temperature 0 to 50 °C/32 to 122 °F
Weight (incl. TopSafe
and battery)
approx. 600 g/1 lb 5 oz
Housing material ABS
Dimensions (L x W x H) 219 x 68 x 50 mm/8.5" x 2.5" x 2"
Measuring rate Auto: 1 sec to 24 h, quick: 0.04 sec
Adaption time 10 min
Refresh rate of display 2/sec, with rapid measurement: 4/sec
Warranty 24 months, warranty conditions: See
web page www.testo.com/warranty
EC Directive 2014/30/EC
4 Product description
9
4Product description
4.1. Overview
4.1.1. Control elements and connections
1IR interface for protocol printer
2Keyboard
Key Function
Print
Select reading 1 (top line), select menu item
Switching on/off
Saving data
Open menu level, confirm selection, execute
function
Zero pressure probes
Cancel process, menu level back
Select reading 2 (bottom line), select menu item
4 Product description
10
Key Function
Keep reading, display maximum/minimum/mean
value
3 Battery compartment (on rear)
4 Connections
Connection Function
1 Socket 1: Thermocouple probe
(type K), NTC probe, pressure probe
2 Socket 2: Thermocouple probe
(type K), NTC probe, pressure probe
RS 232 PC connection
12 V DC 12 V DC mains unit (0554 0088)
+ Pressure nipple with quick-release connection
- Pressure nipple with quick-release connection
4.1.2. Display
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