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Operating Manual 

Digital pressure gauge 3319 and 3320 

SUKU Druck und Temperaturmesstechnik GmbH 

Garnsdorfer Hauptstraße 109 
09244 Lichtenau OT Garnsdorf 
Germany 
Phone 

+49 (0) 3 72 08 / 27 17 

Fax 

+49 (0) 3 72 08 / 6 17 – 13 

Email [email protected] 
Homepage www.suku.de 
 

It is possible to download data sheets and certificates  at 
our homepage. 

1. General information 

1.1 Information on the operating manual 

This operating manual contains important information on 
proper usage of the device. Read this operating manual 
carefully before installing and starting up the pressure 
measuring device. 

Adhere to the safety notes and operating instructions which 
are given in the operating manual. Additionally applicable 
regulations regarding occupational safety, accident 
prevention as well as national installation standards and 
engineering rules must be complied with! 

This operating manual is part of the device and must be 
kept at a, for the personnel always accessible location, 
close to the installation position of the device. 

This operating manual is copyrighted. The contents of this 
operating manual reflect the version available at the time of 
printing. It has been issued to our best knowledge and 
belief. However, errors may have occurred. For incorrect 
statements and their consequences, liability cannot be 
assumed by SUKU. 

– Technical modifications reserved – 

1.2 Symbols used 

 

DANGER! – Dangerous situation, which may result in 
serious or fatal injuries 

 

WARNING! – Potentially dangerous situation, which 
may result in fatal or serious injuries 

 

CAUTION! – Potentially dangerous situation, which 
may result in minor injuries 

!

 

CAUTION! – Potentially dangerous situation, which 
may result in damage of objects 

 

NOTE – Tips and information for the user to ensure 
good conditions for the operation. 

1.3 Target group 

 

WARNING! To avoid hazards for the operator and 
damages of the device, following described instructions 
have to be worked out by qualified technical personnel. 

1.4 Limitation of liability 

No liability is assumed and warranty claims are excluded in 
case of non-observance of the operating manual, improper 
application, modification of or damage to the device. 

1.5 Intended use 

- The battery powered digital pressure gauge has been 

exclusively designed for applications in hydraulics and 

pneumatics as well as for mechanical engineering. It 
can be easily and quickly installed in situ. 

-  It is in the responsibility of the user to verify whether the 

chosen device is suitable for the intended application. 
In case of any doubts, contact our sales department to 
eliminate any indistinctness. SUKU does not assume 
any liability for an incorrect selection and its 
consequences! 

-  Permissible media are gases or liquids, specified in the 

data sheet. Additionally the operator has to ensure that 
the medium is compatible with the media wetted parts, 
for the intended application. 

-  The technical data listed in the current data sheet are 

engaging and must be complied with. If the data sheet 
is not available, please order or download it from our 
homepage. (

http://www.suku.de

 ) 

 

WARNING! – Danger through improper usage!  

1.6 Package contents 

Please verify that all listed parts are undamaged included in 
the delivery and check for consistency specified in your 
order: 

-  digital pressure gauge  

-  this operating manual  

2. Product identification 

The device can be identified by its manufacturing label. It 
provides the most important data. By the ordering code, the 
product can be clearly identified. For identification of the 
firmware the program version will appear for about 1 second 
in the display after starting up the device. Please hold it 
ready for inquiry calls.

 

!

 

The manufacturing label must not be removed from the 
device! 

 

3. Installation 

3.1 Mounting and safety instructions 

 

WARNING!

 

Install the device only when depressurized 

and currentless! 

 

WARNING!

 

This device may only be installed by 

qualified technical personnel who has read and 
understood the operating manual! 

!

 

Handle this electronic precision measuring device 
carefully in packed as well as in unpacked condition! 

!

 

The device must not be subject to any changes or 
modifications. 

!

 

The device may not be thrown! 

!

 

To avoid damaging the diaphragm, remove packaging 
and protective cap only directly before starting up the 
device. A delivered protective cap must be stored!

 

 

!

 

Place the protective cap on the pressure port again 
immediately after disassembling. 

!

 

Handle the unprotected diaphragm very carefully - it is 
very sensitive and may be easily damaged. 

!

 

Do not use any force when installing the device to 
prevent damage of the device and the plant! 

!

 

The display and the plastic housing are equipped with 
rotational limiters. Please do only rotate the display or 
the housing within the limit. 

 

Take care that no mechanical stresses occur at the 
pressure port as a result of the installation, since this 
may cause a shifting of the characteristic curve. 

 

In hydraulic systems, position the device in such a way 
that the pressure port points upward (venting). 

 

Provide a cooling line when using the device in steam 
lines. 

3.2 General installation steps 

-  Carefully remove the pressure measuring device from 

the package and dispose of the package properly. 

-  Then go ahead as detailed in the specific instructions 

below.  

3.3 Installation steps for EN 837 

-  Use a suitable seal, corresponding to the medium and 

the pressure input (e. g. a cooper gasket). 

-  Ensure that the sealing surface of the taking part is 

perfectly smooth and clean. 

-  Screw the device into the corresponding thread by 

hand. 

-  Tighten it with a SW 27 wrench  

(for G1/4": approx. 20 Nm; for G1/2": approx. 50 Nm). 

3.4 Installation steps for NPT connections 

-  Use a suitable seal, corresponding to the medium and 

the pressure input (e. g. a PTFE-strip). 

-  Screw the device into the corresponding thread by 

hand. 

-  Tighten it with a SW 27 wrench (for 1/4" NPT: approx. 

30 Nm; for 1/2" NPT: approx. 70 Nm). 

3.5 Positioning of the display module 

The display module of the pressure gauge is rotatable so 
that clear readability is guaranteed even on unusual 
installation positions. 

Fig. 2 display module 

4. Initial start-up 

 

WARNING! Before start-up, the user has to check for 
proper installation and for any visible defects. 

 

WARNING! The device can be started and operated by 
authorized personnel only, who have read and under-
stood the operating manual! 

 

WARNING! The device has to be used within the 
technical specifications, only (compare the data in the 
data sheet)! 

5. Operation 

5.1 Operating and display elements 

Fig. 3 LC-display 

The indication of the measured value as well as the 
configuration of the individual parameters occurs menu-
driven via the LC display. The individual functions can be 
set with the help of three miniature push buttons located in 
the front. 
The menu system is a closed system allowing you to scroll 
both forward and backward through the individual set-up 
menus to navigate to the desired setting item. All settings 
are permanently stored in an EEPROM and therefore 
available again even after a battery change. 

 

limit exeeding 

 

neg. / pos. 

symbol for

indicate low 

batteries

unit 

measured value 

 

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