TESTO 312, 312-2, 312-3 Instruction Manual
testo 312 - 2/3
Instruction manual
www. .com
information@itm.com1.800.561.8187
Introduction2
Initial operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Diagram of instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Operating the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Measurement example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Switching on instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Differential pressure measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Fine pressure/Draught measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Connection options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pre-test / Main test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Service ability test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Setting alarm limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Setting date/time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Setting timer for printout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Setting number of printouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Changing the units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Changing rechargeable battery or battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Ordering data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Pressure transducer (Accessories). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Dear Customer
You have made the right decision by purchasing testo 312.
testo 312 is designed to adjust and maintain gas heating systems.
Thousands of customers buy our high standard products every year. There are at least 7 good
reasons for doing so.
1) Cost-performance ratio. Reliable quality at a fair price.
2) Extended warranty times of up to 3 years - depending on instrument!
3) We have the ideal solutions for your measuring tasks based on our expert experience gained
over 40 years.
4) Our high quality standard is confirmed by the ISO 9001 certificate.
5) Of course, our instruments carry the CE symbol required by the EU.
6) Calibration certificates for all relevant parameters. Seminars, advice and calibration on location.
7) Our after-sales service. Contact us for more information.
Contents
Introduction
2
Instrument conforms with 2004/108/EEC
www. .com
information@itm.com1.800.561.8187
No reading in display?
Send instrument for service.
Function test
for both pressure nipples
Warnings
Safety instructions
Initial operation
3
Capacity display
Voltage >7.2 V
Life of rechargeable battery: approx. 5 h
Life of battery: approx. 15 h
(at an ambient temperature of 20°C)
Flashing symbol, voltage: <7.2 V
Life of rechargeable battery: approx. 15 min.
Life of battery: approx. 45 min.
If the rechargeable battery voltage drops below
6.7 V automatic switch-off follows as protection
against total discharge.
Low Bat
++
Function check/Leak check
Prior the commencing any testing the complete
measuring system (intrument, probe and hoses) should
be checked for leaks
Temperature influence on the leak test
During any leak tests the ambient temperature must
remain constant to obtain valid data.
Instrument should only be used by trained personnel.
Always adhere to any system safety instructions and
never use the equipment in an explosive environment.
Under normal operating conditions gas will not escape
from the instrument when connected to the gas pipe /
system under test.
The instrument is not designed to operate while wet, or
in an environment of condensing humidity
The instrument should only be used in the conditions
and for the purposes for which it was constructed.
Please take particular note of the safety instructions
and the technical data.
The instrument should only be used in the operation and
measurement ranges specified in the technical data.
www. .com
information@itm.com1.800.561.8187
Initial operation
4
Symbol for alarm
On/Off
Print
Battery capacity
Start
measurement/
Freeze readings
Print button
Cancel/Restore
Audible alarm
On/Off button
Alarm levels
Parameters
Parameters
Measuring units
Measuring units
Date/Time
On/Off button
OK button
Scroll buttons
Time
Pressure
connection
Freeze readings
Parameters
Readings
Diagram of instrument
www. .com
information@itm.com1.800.561.8187
Initial operation
5
Operating the instrument
Keypad
- Scrolling buttons
Using the arrow buttons / you can scroll
between the parameters, digits in date/time and the alarm
limits can be set.
- Selection button
In the date/time and alarm limits menu, access to the
variable parameters is via the arrow button pointing to the
right .
The units can also be changed. The parameters are set
using the up and down buttons.
- Printing
All of the saved readings can be printed on the printer by
pressing Print .
- I/O button
The instrument is switched on or off via the I/O button
. The display switches off automatically after 5
seconds once the instrument is switched off. This can be
prevented by pressing any button. The instrument then
goes to the Δp measurement menu.
The readings in the display are usually lost when the
instrument is switched off.
- Cancel button
The Cancel button is used to cancel a selected
process or to leave a sub-menu.
- OK button
The changed parameters are saved by pressing .
- START/HOLD button
Start measurement by pressing . The displayed
readings are frozen by pressing again
.
- Alarm on/off button
Switches audible signal on or off.
www. .com
information@itm.com1.800.561.8187
Self-test
Press button. Displays all segments for
approx. 3 seconds.
Battery capacity / Instrument version (2 digit)
Displays battery/rechargeable battery voltage
and instrument version for approx. 3 seconds.
Instrument version (3 digit)
If the button is pressed within 3 seconds
the version number is shown in 3 digits. You then
go to the measurement menu.
Instrument switches off
6
9.0
08:38
--------
1.0
Self-test
Measurement menu
Display for
battery
capacity /
instrument version
9.0
1.00
Instrument
version
Connect hose.
3 s
3 s
5 s
3 s
Measurement example: testo 312-2/-3
Switching on instrument
www. .com
information@itm.com1.800.561.8187
7
08:38
2
09:15
13.0
08:38
-----
Measurement
menu
Switch on
instrument
Wait on calibration
phase (5 s)
Save reading.
HOLD appears in
display.
The saved readings can
be printed.
Position pressure
measurement hose. The
reading appears in the
display.
Start measurement
- Segment test (3 s)
- Voltage display (3 s)
(see page 6)
8
7
09:15
13.0
6
5
3
2
4
9
Measurement example: testo 312-2/-3
Differential pressure measurement
Connect
pressure
measuring
hose
testo 312-2: Range: 0 to 200 hPa. Resolution: 0.1 hPa
testo 312-3: Range: 0 to 6000 hPa. Resolution: 1 hPa
1
www. .com
information@itm.com1.800.561.8187
Loading...