PKP DB51 User manual

Instruction Manual
DB51
Compact mass thermal flowmeter and
counter for gases
PKP Prozessmesstechnik GmbH
Borsigstraße 24
D-65205 Wiesbaden- ordenstadt
Tel.: ++49-(0)6122-7055-0
Fax: ++49-(0)6122-7055-50
Email: [e-mail] www.pkp.de

Foreword
DB51 EN V1.22 Page 2o 40
I. Foreword
Dear customer,
thank you very much for deciding in favour of the DB51. Please read this
installation and operation manual carefully before mounting and initiating the device
and follow our advice. A riskless operation and a correct functioning of the
DB51 are only guaranteed in case of careful observation of the described
instructions and notes
PKP Prozessmesstechnik
Borsigstraße 24
D-65205 Wiesbaden
Tel.: [phone]
Fax: [phone]
Mail: [e-mail]
Web: www.pkp.de

Table of Content
DB51 English V1.22 Page 3 of 40
II. Table of Contents
I. Foreword ....................................................................................................................... 2
1Intended use.................................................................................................................. 5
2Safety instructions........................................................................................................ 5
3Instruments description ............................................................................................... 6
4Technical data............................................................................................................... 7
5Scope of delivery.......................................................................................................... 7
6Scaling Analogue output Compressed Air............................................................... 8
7Installation Description ................................................................................................ 9
7.1 Pipe/tube requirements ......................................................................................................... 9
7.2 Inlet / outlet runs.................................................................................................................... 9
7.3 Installation of DB51.......................................................................................................... 10
7.4 Display head Position.......................................................................................................... 10
8Flow measuring ranges...............................................................................................11
8.1 Flow for different gases....................................................................................................... 11
9Dimensions ..................................................................................................................12
9.1 With measurement section and screw-in thread.............................................................. 12
9.2 With measurement section and flange (Material stainless steel 1.4404):...................... 13
10 Electrical wiring........................................................................................................14
10.1 Modbus RTU, 4…20mA, Pulse or MBus ............................................................................ 14
10.2 Ethernet (optional PoE) ...................................................................................................... 15

Table of Content
DB51 EN V1.22 Page 4o 40
11 Operation...................................................................................................................16
11.1 Initialization .......................................................................................................................... 17
11.2 Main menu ............................................................................................................................ 17
11.3 Settings................................................................................................................................. 18
11.3.1 Sensor Setup................................................................................................................... 18
11.3.1.1 Input / change tube diameter.................................................................................... 18
11.3.1.2 Input / change consumption counter ........................................................................ 19
11.3.1.3 Definition of the units for flow, velocity, temperature and pressure ......................... 19
11.3.1.4 Definition of the reference conditions....................................................................... 20
11.3.1.5 Setting of Zero point and Low-flow cut off................................................................ 22
11.3.2 Modbus settings............................................................................................................... 23
11.3.2.1 Modbus RTU Setup.................................................................................................. 23
11.3.2.2 Modbus TCP (Optional)............................................................................................ 24
11.3.2.2.1 Network Setup DHCP........................................................................................... 24
11.3.2.2.2 Network Settings static IP..................................................................................... 25
11.3.2.3 Modbus TCP Settings............................................................................................... 26
11.3.2.4 Modbus Settings (2001…2005)............................................................................. 27
11.3.2.5 Values Register (1001 …1500) ................................................................................ 27
11.3.3 Pulse /Alarm..................................................................................................................... 29
11.3.3.1 Pulse output.............................................................................................................. 29
11.3.4 User Setup....................................................................................................................... 30
11.3.4.1 Password.................................................................................................................. 30
11.3.4.2 Language.................................................................................................................. 30
11.3.4.3 Display / Touch......................................................................................................... 31
11.3.5 Advanced......................................................................................................................... 31
11.3.6 4 -20mA ........................................................................................................................... 32
11.3.7 DB51 Info...................................................................................................................... 34
11.4 MBus...................................................................................................................................... 35
11.4.1 Default Settings communication...................................................................................... 35
11.4.2 Default values transmitted ............................................................................................... 35
12 Status / Error messages...........................................................................................36
12.1 Status messages.................................................................................................................. 36
12.2 Error messages.................................................................................................................... 37
13 Maintenance..............................................................................................................38
14 Cleaning of the sensor head....................................................................................38
15 Re-Calibration...........................................................................................................38
16 Spare parts and repair..............................................................................................38
17 Calibration.................................................................................................................38
18 Warranty....................................................................................................................38

Safety instructions
DB51 English V1.22 Page 5 of 40
1 Intended use
The DB51 consumption sensor is used for continuous flow measurements.
The DB51 consumption sensor is designed and constructed exclusively for the intended purpose
described here and may only be used accordingly.
The user must check whether the instrument is suitable for the selected application. It must be
ensured that the medium is compatible with the wetted parts. The technical data listed in the data
sheet are binding.
Improper handling or operation outside the technical specifications is not permitted. Claims of any kind
based on improper use are excluded.
2Safety instructions
Please read carefully before starting the device!
Warning: Do not exceed the pressure range of 16 bar!
Observe the measuring range of the sensor!
Always observe the direction of flow when positioning the sensor!
The screwed fixture must be pressure tight.
It is absolutely necessary to avoid condensation on the sensor element or water drops in the
measuring air as they may cause faulty measuring results.
The manufacturer cannot be held liable for any damage which occurs as a result of non-observance or
non-compliance with these instructions. Should the device be tampered with in any manner other than
a procedure which is described and specified in the manual, the warranty is cancelled and the
manufacturer is exempt from liability.
The device is destined exclusively for the described application.
We offer no guarantee for the suitability for any other purpose and are not liable for errors which may
have slipped into this operation manual. We are also not liable for consequential damage resulting
from the delivery, capability or use of this device.
We offer you to take back the instruments of the instruments family DB51 which you would like to
dispose of.
Qualified employees from the measurement and control technology branch should only carry out
adjustments and calibrations.
The consumption sensor DB51 works according to the calorimetric measuring procedure.
Flammable gases
If this consumption sensor is used for measurement of flammable gases (e. g. natural gas and so on)
we expressly would like to point out that the sensor has no DVGW admission, however, it can be used
for measurements in natural gas. A DVGW admission is not mandatory.
The consumption sensor corresponds with the current state of technology and basically it can be used
in any flammable and non-flammable gases.
If the sensor is used e.g. in the medium natural gas, the sensor will be adjusted for natural gas. The
calibration protocol (inspection certificate) will be included in the scope of delivery.
The area outside the pipeline (ambient area of the sensor) must not be an explosive area.
The installation has to be carried out by authorized professionals.

Instruments decription
DB51 English V1.22 Page 6 of 40
3Instruments description
The DB51 is a compact consumption counter for compressed air and gases.
Special features:
- Optimum accuracy due to compact design
- Integrated Display showing Flow, consumption, velocity and temperature
- Input inner tube diameter via display keys
- Units free selectable. m³/h, m³/min, l/min, l/s, kg/h, kg/min, kg/s, cfm
- Modbus RTU (RS485) Interface
- Analogue output 4..20mA
- Pulse output galv. isolated.

Technische Daten
DB51 English V1.22 Page 7 of 40
4Technical data
Measurement: Flow and consumption
Reference Standard: Standard settings ex works:
DIN 1945, ISO 1217 at 20°C and 1000 mbar
Selectable Units m³/h (Standard settings ex works)
m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min, kg/s
Measuring principle: calorimetric measurement
Sensor: Pt45, Pt1000
Measuring medium: Air, gases
Operating temperature: -30 ... 80°C probe tube
-20 ... 70°C housing
Rel. humidity of the
measuring medium: < 95 % r.H. (no condensation allowed on the sensor element)
Operating pressure: up to 16 bar, special version PN 40 (40 bar)
Power supply: 18 to 36 VDC
Power consumption: max. 5W
Digital output: RS 485 (Modbus RTU)
Analog output: 4...20 mA (see chapter 4), max. burden < 500 Ohm
Pulse output: pulse output potential free (dry contact)
passive: max. 48Vdc, 150mA
1 pulse pro m³ resp. pro l,
Valency adjustable with the display keys
Accuracy: ± 1,5 % m.v., ± 0,3 % f. s.*
Display: TFT 1.8 Resolution 220 x 176
Mounting thread: R 1/4", R1/2", R3/4", R1", R 1 1/4" R1 1/2", R 2” DIN EN
10226 (ISO 7-1)
Material: Stainless steel 1.4301 / 1.4404
Version with flange DIN EN 1092-1: Stainless steel 1.4404
Protection class: IP65
* m.v. = measured values
f.s. = full scale
5 Scope of delivery
1x Flow sensor DB51 with measuring section
1x Calibration certificate
1x Instruction manual

Scaling Analogue output
DB51 English V1.22 Page 8 of 40
6Scaling Analogue output Compressed Air
Reference DIN1945/ ISO 1217: 20°C, 1000 mbar (Reference during calibration)
Description
Version
Analogue output
DB51 with integrated 1/4" meas. section
Low Speed
4… 20 mA =
0...25 l/min
Standard
0...50 l/min
Max
0...105 l/min
High Speed
0...130 l/min
DB51 with integrated 1/2" meas. section
Low Speed
4… 20 mA =
0...20 m³/h
Standard
0...45 m³/h
Max
0...90 m³/h
High Speed
0...110 m³/h
DB51 with integrated 3/4" meas. section
Low Speed
4… 20 mA =
0...45 m³/h
Standard
0...85 m³/h
Max
0...175 m³/h
High Speed
0...215 m³/h
DB51 with integrated 1" meas. section
Low Speed
4… 20 mA =
0...75 m³/h
Standard
0...145 m³/h
Max
0...290 m³/h
High Speed
0...355 m³/h
DB51 with integrated 1 1/4" meas.
section
Low Speed
4… 20 mA =
0...140 m³/h
Standard
0...265 m³/h
Max
0...530 m³/h
High Speed
0...640 m³/h
DB51 with integrated 1 1/2" meas.
section
Low Speed
4… 20 mA =
0...195 m³/h
Standard
0...365 m³/h
Max
0...730 m³/h
High Speed
0...885 m³/h
DB51 with integrated 2" meas. section
Low Speed
4… 20 mA =
0...320 m³/h
Standard
0...600 m³/h
Max
0…1195m³/h
High Speed
0...1450 m³/h
DB51 with integrated 2 1/2" meas.
section
Low Speed
4… 20 mA =
0...550 m³/h
Standard
0...1025 m³/h
Max
0…2050m³/h
High Speed
0...2480 m³/h
DB51 with integrated 3" meas. section
Low Speed
4… 20 mA =
0...765 m³/h
Standard
0...1420 m³/h
Max
0…2840m³/h
High Speed
0...3440 m³/h

Installation
DB51 English V1.22 Page 9 of 40
7Installation Description
7.1 Pipe/tube requirements
•Correctly sized gaskets
•Correct aligned flanges and gaskets
•Diameter mismatch at the pipe junctions should be avoided but must be less than 1mm. For
further information see ISO 14511
•Ensure clean pipes after installation
7.2 Inlet / outlet runs
The principle of thermal Mass flow measurement is very sensitive against disturbances. Therefore, it is
necessary to ensure the recommended inlet and outlet runs.
Table of additionally required inlet sections
Flow obstruction in front of the
measuring section
Minimum length inlet
section (L1)
Minimum length
outlet section (L2)
Slight curve
(bend < 90°)
12 x D
5 x D
Reduction
(pipe narrows towards the meas. section)
15 x D
5 x D
Expansion
(pipe expands towards the meas. section)
15 x D
5 x D
90° bend
or T-piece
15 x D
5 x D
2 bends á 90°
on one level
20 x D
5 x D
2 bends á 90°
3-dimensional change of direction
35 x D
5 x D
Shut-off valve
45 x D
5 x D
15 x D 5 x D
15 x D 5 x D15 x D
15 x D 5 x D
20 x D 5 x D
35 x D 5 x D
5 x D45 x D
The respective minimum values required are indicated here. If it is not possible to observe the
stipulated equalising sections, considerable deviations in the measuring results must be expected.
Attention:
The dimensions of the DB51 consumption counter measuring sections do not fullfill the required
minimum lengths of the input and outlet runs.
Please ensure recommended in - and outlet distances, dimensions for measuring sections see page
12 and 13.

Installation
DB51 EN V1.22 Page 10 o 40
7.3 Installation of DB51
The sensor DB51 is pre-supplied with the measuring section.
•An installation at customer site is only allowed in the unpressurized state of
the system
•It has to be checked whether the VA520 is correctly installed in the
measuring section, the flow direction arrows must point in the same
direction.
>>> Flow >>> >>> Flow >>>
•The connecting nut is tightened to a torque of 25 -30 Nm.
•Tightness of the connection must be checked and ensured
7.4 Display head Position
Fastening screws
The Position of the Display head is twistable by 180 e.g. in
case of reverse flow direction.
For this purpose the 6 fastening screws are to be released
and the display head rotated 180°.
Caution:
It must be ensured that the connection plugs are still plugged
and the gasket is installed correctly.

Measuring ranges
DB51 English V1.22 Page 11 of 40
8Flow measuring ranges
8.1 Flow for different gases
1/4"
1/2"
3/4"
1"
1 ¼"
1 ½"
2"
2 ½"
3"
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
l/min
[m³/h]
[m³/h]
[m³/h]
[m³/h]
[m³/h]
[m³/h]
[m³/h]
[m³/h]
Reference DIN1945/ ISO 1217: 20°C, 1000 mbar (Reference during calibration)
Air
Low Speed
25
20
45
75
140
195
320
550
765
Standard
50
45
85
145
265
365
600
1025
1420
Max
105
90
175
290
530
730
1195
2050
2840
High Speed
130
110
215
355
640
885
1450
2480
3440
Adjustment to DIN 1343: 0°C, 1013,25 mbar
Air
Low Speed
25
20
40
70
130
180
295
505
705
Standard
50
40
80
135
240
335
550
945
1305
Max
100
80
160
270
485
670
1100
1885
2610
High Speed
120
100
195
325
590
815
1330
2280
3165
Argon
(Ar)
Low Speed
45
35
75
120
220
305
505
865
1200
Standard
85
70
135
230
415
570
935
1605
2225
Max
170
140
275
460
830
1140
1870
3205
4440
High Speed
205
170
335
555
1005
1385
2265
3880
5380
Carbon dioxide
(CO2)
Low Speed
25
20
45
75
140
195
320
545
760
Standard
50
45
85
145
260
360
590
1015
1405
Max
105
90
175
290
525
720
1185
2030
2810
High Speed
130
105
210
350
635
875
1430
2455
3405
Nitrogen
(N2)
Low Speed
25
20
40
70
130
180
295
505
705
Standard
50
40
80
135
240
335
550
945
1305
Max
100
80
160
270
485
670
1100
1885
2610
High Speed
120
100
195
325
590
815
1330
2280
3165
Oxygen f
(O2)
Low Speed
25
20
45
75
135
185
305
525
730
Standard
50
40
80
140
250
345
570
980
1355
Max
100
85
165
280
505
695
1140
1955
2710
High Speed
125
105
205
340
610
845
1380
2365
3280
Nitrous oxide
(N2O)
Low Speed
25
20
45
75
140
190
315
540
750
Standard
50
40
85
140
260
355
585
1005
1395
Max
105
85
170
285
520
715
1170
2010
2785
High Speed
125
105
210
345
630
865
1420
2435
3375
Natural gas
(NG)
Low Speed
15
15
25
45
85
115
190
325
450
Standard
30
25
50
85
155
215
355
605
840
Max
60
50
105
170
310
430
705
1210
1680
High Speed
75
65
125
210
380
520
855
1465
2035
Other gases on request
Please note:
The consumption sensor corresponds with the current state of technology and basically it can be used
in any flammable and non-flammable gases.
If this consumption sensor is used for measurement of flammable gases (e.g. natural gas and so on)
we expressly would like to point out that the sensor has no DVGW admission, however, it can be used
for measurements in natural gas. A DVGW admission is not mandatory.
The area outside the pipeline (ambient area of the sensor) must not be an explosive area.

Dimension
DB51 English V1.22 Page 12 of 40
9Dimensions
9.1 With measurement section and screw-in thread
Pipe size
AD / ID
(mm)
L
(mm)
L1
(mm)
H
(mm)
H1
(mm)
R
A
(mm)
DB51 1/4"
DN 8
13,7 / 8,5
194
137
176,6
166,3
R 1/4"
15
DB51 1/2“
DN 15
21,3 / 16,1
300
210
177,0
166,3
R 1/2“
20
DB51 3/4“
DN 20
26,9 / 21,7
475
275
179,8
166,3
R 3/4“
20
DB51 1“
DN 25
33,7 / 27,3
475
275
183,2
166,3
R 1“
25
DB51 1 1/4"
DN 32
42,4 / 36,0
475
275
187,5
166,3
R 1 1/4"
25
DB51 1 1/2“
DN 40
48,3 / 41,9
475
275
190,5
166,3
R 1 1/2“
25
DB51 2“
DN 50
60,3 / 53,1
475
275
196,5
166,3
R 2“
30

Dimension
DB51 EN V1.22 Page 13 o 40
9.2 With measurement section and flange (Material stainless steel 1.4404):
Flange DIN EN 1092-1
Pipe size
AD/ID
(mm)
L
(mm)
L1
(mm)
H
(mm)
H1
(mm)
Ø D
in mm
Ø K
in mm
nxØL
in mm
DB51 1/2“
DN 15
21,3 / 16,1
300
210
213,8
166,3
95
65
4 x 14
DB51 3/4“
DN 20
26,9 / 21,7
475
275
218,8
166,3
105
75
4 x 14
DB51 1“
DN 25
33,7 / 27,3
475
275
223,8
166,3
115
85
4 x 14
DB51 1 1/4"
DN 32
42,4 / 36,0
475
275
263,3
166,3
140
100
4 x 18
DB51 1 1/2“
DN 40
48,3 / 41,9
475
275
2 40,7
166,3
150
110
4 x 18
DB51 2“
DN 50
60,3 / 53,1
475
275
248,2
166,3
165
125
4 x 18
DB51 2 1/2“
DN 65
76,1 / 68,9
475
275
268,2
175,7
185
145
8 x 18
DB51 3“
DN 80
88,9 / 80,9
475
275
275,7
175,7
200
160
8 x 18

Electrical wiring
DB51 English V1.22 Page 14 of 40
10 Electrical wiring
10.1 Modbus RTU, 4…20mA, Pulse or MBus
Attention: Not required connections NC must not be connected to a voltage and/or to protection
earth. Cut and insulate cables.
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Connector plug A
+VB
RS 485 (A)
RS 485 (+)
-VB
RS 485 (B)
RS 485 (-)
I+
4..20 mA
Connector plug B
Pulse output (standard)
NC
GND
DIR
Pulse
galv. isolated
Pulse
gavl. isolated
Connector plug B
Option MBus
NC
GND
DIR
MBus
MBus
Colours pulse cables
0553 0106 (5 m)
0553.0107 (10 m)
brown
white
blue
black
grey
Legend:
-VB
Negative supply voltage 0 V
Pulse
Pulse for consumption
+VB
Positive supply voltage 18...36 VDC smoothed
NC
Must not be connected to a voltage
and/or to protection earth. Please cut
and isolate cables.
I +
Current signal 4...20 mA –selected measured
signal
RS 485 (A)
RS 485 (B)
Modbus RTU A / Modbus RTU (+)
Modbus RTU B / Modbus RTU (-)
MBus
MBus (reverse polarity protected)
If no connection cable/ pulse
cable is ordered the sensor will
be supplied with a M12
connector plug. The user can
connect the supply and signal
cables as indicated in the
connection diagram.
.
M12 Connector plug
View from back side
(terminal side)
Connector plug A (M12 - A-coding) Connector plug B (M12 - A-coding)
3
4
5
1
2
+ VB
- VB
4 … 20mA
+ -
Grau / Grey
Blau / Blue
Weiss / White
Schwarz / Black
Modbus (B)
Modbus (A)
Braun / Brown
3
4
5
1
2
Grau / Grey
Schwarz / Black
Impulsausgang / Pulse output
Remark: If the sensor is placed at the end of the Modbus system a termination is required. The sensors have an
internal switchable termination, therefore the 6 fastening screws from the lid are to be released and set
the internal DIP Switch to “On”. It must be ensured that the connection plugs are still plugged and the
gasket is installed correctly, see also chapter 4.1.
Alternatively, a 120R resistor can be installed in the plug between pin 2 and pin 4.
- Connector plug A
- Connector plug B

Dimension
DB51 EN V1.22 Page 15 o 40
10.2 Ethernet (optional PoE)
Connector plug B Connection cable
M12 x-coded 8 pole M12 x-coded to RJ45
Data LINES: 1,2 und 3,4
PoE LINES: 5,6 und 7,8
2
81
3
54
6
7
M12 x 1
Connection cable: Cat 6. Shield connected
Remark:
VA520 Power Classification acc. IEEE 802.3af: Class 2 (3,84W –6,49W)
*PoE: Power over Ethernet
- Connector plug A
- Connector plug B( M12 X coded 8 pole

Operation
DB51 English V1.22 Page 16 of 40
11 Operation
Remark: Only for version with display
“Up“ ( ) “OK“ ( )
The operation of the DB51 is done by the two capacitive key buttons Up () and Enter (↵)

Operation
DB51 EN V1.22 Page 17 o 40
11.1 Initialization
11.2 Main menu
Switching to pages 2-5 or back by pressing key „“
AV-Time (Period for average value calculation) could be changed under Sensor Setup.-Advanced–AV-Time
HW Version Page-No.
Gas /
Status Info
SW Version Modbus ID
391.23
391
1 minutes
410,34
1 minute
91,3282.46
After switching on the DB51, the initialized
screen is displayed followed by the main
menu.

Operation
DB51 EN V1.22 Page 18 o 40
11.3 Settings
The settings menu could accessed by pressing the key „OK“.
But the access to the settings menu is password protected.
11.3.1 Sensor Setup
Setup →Sensor Setup
11.3.1.1 Input / change tube diameter
For DB51 not adjustable (suspended) as voted on included measuring section with corresponding pipe
diameter.
53.1 mm
For changes, first select the menu item
with key „“and then confirm it with
“OK“.
Selection of a menu item or to change a value
is done with the key „“,a final move to the
chosen menu item or takeover of the value
change needs the confirmation by pressing the
key „OK“
Factory settings for password at the time of
delivery: 0000 (4 times zero).
If required the password could be changed at
Setup–User setup-Password.
.

Operation
DB51 EN V1.22 Page 19 o 40
11.3.1.2 Input / change consumption counter
Setup →Sensor Setup→Total Counter → Unit button
Important!
When the counter reach 100000000 m³ the counter will be reset to zero.
11.3.1.3 Definition of the units for flow, velocity, temperature and pressure
Setup →Sensor Setup→Units
In order to change, e.g. the unit, first select by
pressing key „“the button “Unit” and then
key “OK”.
Select with the key „“the correct unit and
then confirm selection by pressing 2x „OK“.
Entering / changing the consumption counter
via button „“, select the respective position
and activate the position with the "OK"
button.
By pressing „“ the position value is
incremented by 1. Complete with "OK" and
activate next number position.
Confirm entry by pressing „OK“.
To make changes to the unit for the respective
measurement value, first select by pressing
„“ the field of the „measurement value“ and
activate „it with „OK“ .
Selection of the new unit with „“
In case the quantity of units selectable are not
presentable on one page, pleas move to next
page by pressing „<<“ .
Confirm selection by pressing 2x „OK“.
Procedure for all 4 measurement variables is
analogous.

Operation
DB51 EN V1.22 Page 20 o 40
11.3.1.4 Definition of the reference conditions
Here can be defined the desired measured media reference conditions for pressure and temperature
and times for the filter and averaging.
•Factory pre-setting for reference temperature and reference pressure are 20 °C, 1000 hPa
•All volume flow values (m³/h) and consumption values indicated in the display are
related to 20 °C and 1000 hPa (according to ISO 1217 intake condition)
•Alternatively 0 °C and 1013 hPa (=standard cubic meter) can also be entered as a reference.
•Do not enter the operation pressure or the operation temperature under reference conditions!
Setup →Sensor Setup→Advanced
Setup →Sensor Setup →Advanced →Ref.Pref
Setup →Sensor Setup→Advanced →
Ref.Temp
To make changes, first select a menu with
button „“and confirm selection by pressing
„OK“ .
In order to change, e.g. the unit, first select by
pressing key „“the field “Units” and then
key “OK”.
Select with the key „“the correct unit and
then confirm selection by pressing 2x „OK“.
Input / change of the value by selecting the
respective position with button „“and
entering by pressing button „OK“ .
By pressing „“ the position value is
incremented by 1. Complete with "OK" and
activate next number position.
Procedure for changing the reference
temperature is the same.
Under point "Filtertime" together with the
appropriate "Filter Grade" an attenuation can
be defined.
Input values of 0 -10000 in [ms] are possible.