SIKA Type Q User manual

SIKA Dr. Siebert & Kuehn GmbH & Co. KG * Struthweg 7-9 * 34260 Kaufungen * Germany 1/21
Tel [phone] * Fax [phone] * [e-mail] * www.SIKA.net
DIGITAL PRESSURE GAUGE
OPERATING MANUAL
Reference Type Q

1. Product Identification........................................................................................................................ 4
2. Safety Warnings ............................................................................................................................... 4
3. Introduction....................................................................................................................................... 5
3.1. Technical Description .............................................................................................................. 5
4. Technical Data ................................................................................................................................. 6
4.1. Options .................................................................................................................................... 6
5. Standard Full Scale and Resolution................................................................................................. 7
6. Recommended Mechanical Mounting.............................................................................................. 7
6.1. Positioning ............................................................................................................................... 7
6.2. Installation................................................................................................................................ 7
7. Connections ..................................................................................................................................... 8
7.1. RS-232C Serial Output connection ......................................................................................... 8
7.2. Analogue Output connection ................................................................................................... 8
7.3. Relay Output connection ......................................................................................................... 9
7.4. Digital Input connection ........................................................................................................... 9
8. Power Supply ................................................................................................................................. 10
8.1. Power On............................................................................................................................... 10
8.2. Power Off............................................................................................................................... 10
9. Error Messages .............................................................................................................................. 11
10. Keys Description........................................................................................................................ 11
11. Parameter Programming ........................................................................................................... 12
12.Software Version ....................................................................................................................... 12
13. Parameter Settings .................................................................................................................... 13
13.1. How to get access to the MENU............................................................................................ 13
13.2. How to set parameter values................................................................................................. 13
14. Parameter Description ............................................................................................................... 13
14.1. Set point 1.............................................................................................................................. 13
14.2. Hysteresis 1 ........................................................................................................................... 13
14.3. Set Point 2 ............................................................................................................................. 13
14.4. Hysteresis 2 ........................................................................................................................... 14
14.5. Password ............................................................................................................................... 14
15. Parameters Protected by Password 0007................................................................................. 15
15.1. Measurement Resolution....................................................................................................... 15
15.2. Digital Filters .......................................................................................................................... 15
15.3. Serial Communication ........................................................................................................... 15
15.4. Peak....................................................................................................................................... 15
15.5. Analogue Output.................................................................................................................... 16
15.6. Analogue Output Zero Correction.......................................................................................... 16
15.7. Analogue Output Full Scale................................................................................................... 16
15.8. Analogue Output Signal Amplitude ....................................................................................... 16
16. Parameters Protected by Password 4256................................................................................. 17
16.1. Calibartion Cancellation......................................................................................................... 17

17. Parameters Protected by Password 3124................................................................................. 17
17.1. Instrument Calibration ........................................................................................................... 17
17.2. Calibration Procedure............................................................................................................ 18
17.3. Decimal point ......................................................................................................................... 18
18. Zero Function............................................................................................................................. 19
19. Peak Function............................................................................................................................ 19
20. Hold Function............................................................................................................................. 19
21. Serial Communication Commands............................................................................................ 20
22. Maintenance .............................................................................................................................. 21
22.1. Trouble Shooting ................................................................................................................... 21
23. Dimensions ................................................................................................................................ 21

1. PRODUCT IDENTIFICATION
On the instrument enclosure, are marked in indelible laser all the information for the
identification, the main configuration data, the symbols of conformity and waste disposal, the
production date.
UNAUTHORIZED USES
Environments with explosive atmosphere.
Environments with inflammable or corrosive gas.
DISPOSAL
The instrument is a professional apparatus compliant to the Directives 2002/95/CE
(RoHS) and 2002/96/CE (WEEE), then it must be disposed separately as electric
and electronic waste. In different countries of European Community, it must be
disposed as waste electric and electronic in accord to the laws of the country where the
device is commercialized. Before to remove the instrument, you disconnect first the power
supply and after the cables.
TRANSPORT
The device is made of electronic components. In case of transport pack it carefully. Pay
attention to both strong shocks and humidity.
DELIVERY
Instrument is tested in any of its parts, it is supplied configured and calibrated.
2. SAFETY WARNINGS
The installation and maintenance of the product should be done only by trained and after
reading this manual. There must also be complied all safety standards set by the law of the
country where you will install it.
The manometer has been designed for measure and display of pressure and should not be
used for different purposes: SIKA otherwise won’t be responsible. In particular should be
noted that the supplied product is not a safety device.
In designing SIKA has taken precautions to minimize risks to user’s safety, but recommends
persons who install it the analysis and removal of any residual risks.
Please note that the safe use of the product requires its complete integrity: for this reason
should be paid attention to the transport and storage.
Throughout this manual are identified sensitive operations and/ or possible sources of
risk to the user or the equipment itself, with the symbol next to.

3. INTRODUCTION
The digital pressure gauge Type Q is a 0.15% precision class programmable digital gauge
realised with a microcontroller, parameters programming can be done through the keyboard
or through the RS232C (on request). Pressure sensor, manufactured on a strain gauge
technology, ensures a long term stability.
Electronic components, based on SMT and mixed traditional technology, make the gauge
resistant to the mechanical stresses and reliable.
The main characteristics of analogue input section are
sensor excitation in AC
sampling speed up to 100Hz (filter 0).
Available outputs
Two relay set-points with programmable thresholds for both positive and negative
field, each set-point has a programmable deactivation threshold.
Analogue output (on request) in tension 0÷10V/±10V or current 0÷20mA/4÷20mA.
Serial output RS232C (on request) with a programmable Baud-rate or data
continuous transmission with a fixed baud-rate.
Available Inputs
4 digital inputs associated to the functions of Zero, Peak, Hold
The indication is based on a red 7-segment display with five digits, Set point and Zero
activation is signalled by red LEDs placed on the front panel. The Instrument can be fed
either at 12 VDC or at 24 VDC depending on the model.
3.1. TECHNICAL DESCRIPTION
Hardware
The Instrument is handled by a microcontroller in flash technology which controls the
peripherals, performs the calculations on the signal sampled by the A/D converter, handle
the indications as well as input and output interfaces. The pressure transducer is fed by a
carrying frequency (5V).
Analogue/digital converter is a component in sigma/delta technology which amplifies and
samples the signal at variable frequency up to 100 Hz according to the selected filter; the
converter works a ratiometric way.
Software
The program handles the measurements, filters the measured signal, calculates the analog
output value and performs the ZERO suppression. Software handling is multitasking.

4. TECHNICAL DATA
RELATIVE PRESSURE
1 - 2.5 - 5 - 10 - 20 bar
50-100-250-350-500-700 bar
1000-1500-2000 bar
LINEARITY and HYSTERESIS
±0.15%
REFERENCE TEMPERATURE
MAX WORKING TEMPERATURE
STORAGE TEMPERATURE
+23C
-10… +70°C
-20… +80°C
EFFECTS ON A 10°C TEMPERATURE VARIATION
a) on zero
b) on full scale
±0.015%
±0.005%
POWER SUPPLY
MAX POWER
EXTERNAL FUSE
12 VDC 10% or 24 VDC 10%
1.2 W or 2.4 W
250 mA (F) 250 V
MAX CONVERSION SPEED
INTERNAL DIVISIONS
DISPLAY
100 Hz (filter = 0)
±99999 div
High efficiency 7 segment red
PROGRAMMABLE SET-POINT
0 ÷ ±99999
PROGRAMMABLE HYSTERESIS
0 ÷ 9999
PROGRAMMABLE RESOLUTION
1, 2, 5, 10, 20, 50, 100
PROGRAMMABLE DIGITAL FILTERS
5
ZERO FUNCTION
100%
PEAK FUNCTION
Positive and Negative
REMOTE INPUTS
Zero, Peak, Hold, Print
OUTPUT RELAYS CHARACTERISTICS (resistive load)
110 VAC, 0.2 A or 48 VDC, 0.2A
MECHANICAL LIMIT VALUES
a) operating pressure
b) limit pressure
c) breaking load
d) highly dynamic pressure
100% FS
150% FS
>300% FS
75% FS
PROCESS COUPLING
TIGHTENING SPANNER
TIGHTENING TORQUE
PROTECTION CLASS - DIN 40050
SENSOR EXECUTION MATERIAL
CASE EXECUTION MATERIAL
ELECTRICAL CONNECTIONS
1/2" BSP male
27 mm
28 Nm
IP 60
INOX 17-4 pH
Aluminium
SUB D 25 pole Female
4.1. OPTIONS
ANALOG OUTPUT
010/10V(*) 020/4÷20mA
SERIAL OUTPUT RS-232C (full duplex)
19200, 9600, 4800 baud
VACUUM (V) range
(-1/+1) (-1/+2.5) (-1/+5) bar

5. STANDARD FULL SCALE AND RESOLUTION
Nominal Pressure
Standard Full Scale
Vacuum FS (option)
Standard Resolution
1 bar
1.0000 bar
-1.0000
0.0001 bar
0,1 mbar
2.5 bar
2.5000 bar
-1.0000
0.0005 bar
0,5 mbar
5 bar
5.0000 bar
-1.0000
0.0005 bar
0,5 mbar
10 bar
10.000 bar
/
0.001 bar
1 mbar
20 bar
20.000 bar
/
0.002 bar
2 mbar
50 bar
50.000 bar
/
0.005 bar
5 mbar
100 bar
100.00 bar
/
0.01 bar
10 mbar
250 bar
250.00 bar
/
0.02 bar
20 mbar
350 bar
350.00 bar
/
0.05 bar
50 mbar
500 bar
500.00 bar
/
0.05 bar
50 mbar
700 bar
700.00 bar
/
0.05 bar
50 mbar
1000 bar
1000.0 bar
/
0.1 bar
100 mbar
1500 bar
1500.0 bar
/
0.2 bar
200 mbar
2000 bar
2000.0 bar
/
0.5 bar
500 mbar
6. RECOMMENDED MECHANICAL MOUNTING
O-RING tight
for pressures <1000 bar
USIT RING 12.70X18X1.5
for pressures <1000 bar
Grip cone tight
for pressures 1000 bar
6.1. POSITIONING
Instrument must be connected to the hydraulic structure through a suitable fitting, it is not a
built-in or a desk gauge. Position it a well light place and properly protected against
atmospheric agents.
6.2. INSTALLATION
Installation shall be done by authorized personnel only.
This instrument has been produced in conformity to the norms EMC according to the
Directive 2004/108/CE. In order to have the conformity respected it is necessary to perform
the electrical connections according both to what written in this manual and to the markings
present on the instrument. For the mounting please follow the indications.

7. CONNECTIONS
Description
Terminal
Name
Earth protection
Power supply (-)
Power supply (+)
Power supply (+)
RS-232 Receive
RS-232 Send
RS-232 Common
Tension output
Analogue outputs common
Current output
Relay 1 common
Relay 1 normal open
Relay 1 normal close
Relay 2 common
Relay 2 normal open
Relay 2 normal close
Digital input 1
Digital input 2
Digital input 3
Digital input 4
Digital inputs common
1
4
5
9
2
3
7
6
19, 21
8
11
12
13
24
22
23
14
16
18
20
15,17,19,21
EARTH
0V
+12Vdc
+24Vdc
RX
TX
GND
VOUT
GND
IOUT
CR1
NO1
NC1
CR2
NO2
NC2
PEAK
ZERO
PRT
HOLD
GND
7.1. RS-232C SERIAL OUTPUT CONNECTION
The instrument can be equipped (as an option) with a serial port to communicate with other
devices. The connecting terminals are as follows:
Receive Terminal 2 RX
Send Terminal 3 TX
Common Terminal 7 GND
7.2. ANALOGUE OUTPUT CONNECTION
An analogue output can be either in voltage or in current, connecting terminals are listed
below, for the connection use shielded cable.
Voltage output characteristics
RL min 10 kΩ
resolution referred to FS(bit) 0…10 V = 16 bit
+/-10 V = 15 bit
Current output characteristics
RL max 500 Ω,
resolution referred to FS(bit) 0…20 mA = 15 bit
4…20 mA = 15 bit
The current outputs can indicate higher values than FS, max. up to 24 mA.
4…20 mA output varies from 0…4mA to show negative values.
voltage output Terminal 6 VOUT
voltage output Terminal 19 GND (common)
Current output Terminal 8 IOUT
Current output Terminal 21 GND (common)
DB25 female connector
(front view)

7.3. RELAY OUTPUT CONNECTION
Max contacts rate (resistive load) 115 VAC, 0.2 A
48 VDC, 0.2 A
Operations number at specified rating 100’000
Relay outputs are not protected. It is necessary to externally protect the contacts against the
transients which generate in commutation on inductive loads in AC with varistors or RC
modules, in DC with varistors or diodes.
Relay 1 common Terminal 11 CR1
Relay 1 normal open/close Terminals 12/13 NO1/NC1
Relay 2 common Terminal 24 CR2
Relay 2 normal open/close Terminals 22/23 NO2/NC2
7.4. DIGITAL INPUT CONNECTION
The Digital input performs the functions listed below; to activate the functions, close the
corresponding terminals.
The outputs associated to PEAK and HOLD functions, are sensitive to the logic status
closed = enabled function
open = disabled function
The output associated to ZERO is sensitive to logic status and to closing time
closed 50…1000 msec. = enabled function
closed >3000 msec. = disabled function
Digital Input 1 Terminals 14-15 PEAK
Digital Input 2 Terminals 16-17 ZERO
Digital Input 4 Terminals 20-21 HOLD

8. POWER SUPPLY
WARNING
To ensure the safety rules and the instrument integrity, the feeding input must be protected
with a F type 250 mA / 250 V fuse.
The electric safety norms referred to the appliances permanently connected to the feeding
require:
A switch or dis-connector which shall be incorporated in the building electric plant.
Such switch or dis-connector must be placed close to the appliance and be easily
reachable by the operator.
Such switch or dis-connector shall be marked as the interruption device of the
appliance.
8.1. POWER ON
Instrument does not have any switch. Connect the instrument through the DB25 connector
placed on the back side, to a 12 VDC or 24 VDC power supply.
Connect input/output signal to DB25 connector, as showed, fix the connector to the
instruments through the screws. Feed the instrument.
At instrument power on all outputs are activated later to enable the instrument to stabilize
itself.
Power must be done by authorized personnel only.
For a better reading accuracy it is advisable that the instrument reach his thermal
stability (~15 minutes).
8.2. POWER OFF
Disconnect the electric net.
5
Output +12Vdc
or
Output +24Vdc
GND
EARTH
4
9
1
+12Vdc
oppure / or
+24Vdc
0V
EARTH
Cable length max 3m
Fuse
Fuse
External feeder
Pressure gauge

9. ERROR MESSAGES
UPPER
Positive overload. Manometer measures a pressure higher than its nominal rate.
LOWER
Negative overload. Manometer measures a depression (vacuum) higher than a -1 bar.
WARNING
After high overloads occurs, check whether calibration has not been changed.
Error 1 / Error 2 / Error 4
Error on internal peripheral.
Error 3
Calibration error
Error 5 / Error 6
The instrument detects a positive/negative analogue signal too heigh that it can’t manages.
10. KEYS DESCRIPTION
SET
ENTER
This key has two functions
1) From main page (pressure indication) it enters into setting parameters
MENU.
2) In Menu it performs ENTER function, confirms the data and show next
parameter.
By pressing SET - the string SP1 P appears.
By pressing ENTER - it go a step forward, the data associated to SETP1 P
appears, by pressing repeatedly ENTER, it enters the next parameters, after
the last parameter, it exits from Menu and pressure is showed.
ZERO
⇩
This key has two functions
1) In the main page (pressure indication) it activates/deactivates the ZERO
function.
2) In the Menu ⇩decreases the number or change the character on the
display. If kept pressed it rapidly decreases the number on the display.
By pressing ZERO - the instrument display is set to zero and the
corresponding LED on the display switches on
By pressing ZERO key for about 3 sec. - ZERO function is disabled and the
LED is switches off.
PEAK
⇧
This key has two functions
1) In the main page (pressure indication) it activates/deactivates the PEAK
function;
When the PEAK function is enabled, then the display flashes.
2) In the Menu ⇧increases the number or changes the character on the
display. If kept pressed it rapidly increases the number on the display.
By pressing PEAK –the peak function is either enabled or disabled. The PEAK
function stores the max. value reached either in pressure or in vacuum.

11. PARAMETER PROGRAMMING
The instrument can be programmed through the parameter MENU:
Set point 1 or
Hysteresis 1
Set point 2 or
Hysteresis 2
Password
oProtected parameters - password
Measurement resolution
Digital Filters
Serial communication
Peak or
Analogue output
Analogue output zero
Analogue output FS
oAnalogue output amplitude
oCalibration suppression - password
oCalibration parameters - password
P0…P6 …
Decimal Point
12. SOFTWARE VERSION
At starting the instrument displays the software version, e.g. “rel. 1.0”. This indication takes
approx. three seconds then the instrument shows the pressure and it is ready to perform
operator instructions/commands.
If something, different form above described procedures happens, please check error
messages and troubleshooting section.
Measurement display is performed through 5 digit, red 7-segmant display, 14 mm height
placed on instrument front part; data are displayed in a numeric way while messages use
mixed characters.

13. PARAMETER SETTINGS
13.1. HOW TO GET ACCESS TO THE MENU
In the main page (pressure indication) press MENU key - on the display the string
“SP1 P” appears, this is the first parameter in the menu.
Press ENTER to display the parameter value associated to “SP1 P”.
Press ENTER to step to the next parameter.
To exit from the MENU repeat to press ENTER, after the last parameter the instrument
shows again the main page and indicates the pressure.
13.2. HOW TO SET PARAMETER VALUES
Press ⇧to increase the number or the character on the display,
if kept pressed, after one second a rapidly increases of the value will happen.
Press ⇩to decrease the number or the character on the display,
if kept pressed, after one second a rapidly decreases of the value will happen.
Press ENTER to store the desired value and the next parameter will show.
14. PARAMETER DESCRIPTION
14.1. SET POINT 1
When the measuring value reaches the set point, then relay R1 and the LED corresponding
to SP1 are activated. Set-point can be programmed either in positive or in negative field.
Setting of set point utilization field P = positive field
n = negative field
Selectable values (NNNNN) -99999…+99999
14.2. HYSTERESIS 1
Calculate the set point deactivation value.
Deactivation value = (SP1 value - Hysteresis1 value).
Relay R1 and the LED corresponding to SP1 are disabled.
Selectable values (NNNN) 0000…9999
14.3. SET POINT 2
When the measuring value reaches the set point, then relay R2 and the LED corresponding
to SP2 are activated. Set-point can be programmed either in positive or in negative field.
Setting of set point utilization field P = positive field
n = negative field
Selectable value (NNNNN) -99999…+99999

14.4. HYSTERESIS 2
Calculate the set point deactivation value.
Deactivation value = (SP2 value –Hysteresis2 value).
Relay R2 and the LED corresponding to SP2 are disabled.
Selectable values (NNNN) 0000…9999
14.5. PASSWORD
A Password is required to get access to the following MENU
Protected parameters (0007)
Calibration suppression (4256)
Calibration parameters (3124)
WARNING
Before entering gauge calibration or calibration suppression, please check the user manual.

15. PARAMETERS PROTECTED BY PASSWORD 0007
15.1. MEASUREMENT RESOLUTION
This function enables the operator to define the variation of the last two digits.
This system is implemented to increase measurement stability in dynamic application at the
expense of reading accuracy.
Selectable values 1 / 2 / 5 / 10 / 20 / 50 / 100
15.2. DIGITAL FILTERS
A digital filter can be inserted by selecting a value different from zero (look at the table).
Digital Filter
0
1
2
3
4
5
Time Table
10ms
20ms
50ms
100ms
200ms
280ms
Measurement Frequency
100Hz
50Hz
10Hz
5Hz
2.5Hz
1.8Hz
Display Frequency
25Hz
25Hz
12.5Hz
10Hz
5Hz
3.1Hz
Integration Time
10ms
20ms
100ms
200ms
400ms
560ms
Selectable filter values 0= off, 1…5
15.3. SERIAL COMMUNICATION
The Pressure gauge can be equipped with a serial port (on request) for remote
communication with a PC/PLC, communication can be performed in two ways:
Master-Slave mode
By programming one of the three available baud-rate, the pressure gauge works as Slave,
instrument reacts only to the serial commands coming from the external master.
Master-mode (or data logger)
By programming the instrument to cyclic transmission of the measured value.
Selections 0 = Serial Disabled
1 = 4800 baud
2 = 9600 baud
3 = 19200 baud
t = Continuous transmission of the value
Master-Slave communication protocol (4800, 9600, 19200) N 8 1
Continuous transmission protocol 9600 N 8 1
15.4. PEAK
To select the type of Peak type
Selectable values P = positive Peak
n = negative Peak

15.5. ANALOGUE OUTPUT
Selecting Y+ENTER operator accesses to analogue output parameters.
Selecting n+ENTER, the operator jumps to the next parameter.
Selectable outputs Disab = disabled (about 0 V)
P 10 = +10 V
Pn 10 =+/-10 V
0-20 = 0…20 mA
4-20 = 4…20 mA
Notes: The analogue output varies proportionally to analogue output full scale, the maximum
resolution is 15 bits for all outputs; the operator can change output signal amplitude from
000.00…109.00% by setting the desired value in dACA parameter.
15.6. ANALOGUE OUTPUT ZERO CORRECTION
This parameter is used to adjust analogue output zero, the change of such parameter
updates in real time analogue output.
Connect a multimeter to analogue output, to get the wanted value, go nearer with the quick
increase/decrease, then continue step by step for fine regulation.
Selecting Y+ENTER operator accesses to parameter change.
Selecting n+ENTER, the operator jumps to the next parameter.
Selectable values 0000…30000
15.7. ANALOGUE OUTPUT FULL SCALE
This is the analogue output full scale value.
Instrument calculates analogue output value according to set value. Analogue output full
scale value can be different from instrument full scale value.
Selecting Y+ENTER operator accesses to parameter change.
Selecting n+ENTER, the operator jumps to the next parameter.
Selectable values 00000…+99999
15.8. ANALOGUE OUTPUT SIGNAL AMPLITUDE
This parameter changes the analogue output amplitude.
100.00 value coincides with analogue output standard amplitude (9.7V((±3%) F.S.),
varying such value operator can amplify or attenuate analogue output signal.
The analogue output changes in real time with the change of this value, to get wanted value,
go nearer with the quick increase/decrease then continue step by step for fine regulation.
E.g.: changing the value from 000.00% to 109.00% operator gets values of signal included
between 0.00…10.4 V or between 0…24 mA.
Selecting Y+ENTER operator accesses to parameter change.
Selecting n+ENTER, the operator jumps to the next parameter.
Selectable values 000.00…109.00%

16. PARAMETERS PROTECTED BY PASSWORD 4256
16.1. CALIBARTION CANCELLATION
WARNING
This function enables to delete the manometer calibration. After having activated this function
the manometer shall be re-calibrated.
To delete the calibration, press ⇧key and select “Y”character, then press Enter to confirm
the selection.
17. PARAMETERS PROTECTED BY PASSWORD 3124
17.1. INSTRUMENT CALIBRATION
WARNING
This procedure must be performed by authorized Calibration Center only and in case of real
need only. SIKA declines any responsibility for measurements errors or bad functioning
caused by calibrations performed not correctly which make lose certification on manometer
as well.
Calibration allows to correct at max. +/-30% of full scale.
Full scale adjustment is performed through a calibration per points which allows to linearize
the pressure sensor too.
Regarding the positive scale (pressure) it is necessary that the manometer learns all the full
scale points: P0=0%, P1=20%, P2=40%, P3=60%, P4=80%, P5=100%.
Regarding the negative scale (vacuum) it is necessary that the manometer learns P6 only
which equals to -1 bar (vacuum scale is handled as an option).
Example: manometer having full scale 5 bar
P6
P0
P1
P2
P3
P4
P5
-1
0
1
2
3
4
5
bar

17.2. CALIBRATION PROCEDURE
Enter into the protected menu by pressing SET, then press ENTER until “PASSW” is shown,
press ENTER to get access to the password setting, set “3124” to enable the manometer
calibration, press ENTER to confirm. “P0”parameter will appear.
P0 (zero point)
Set the manometer at zero pressure by opening the hydraulic circuit, confirm through
ENTER, the manometer shows an internal offset value, set to zero by pressing ZERO,
confirm with ENTER. “P1” parameter appears.
P1 (20%)
Set the manometer in pressure up to 20% of full scale, confirm through ENTER, a value
appears, adjust the value through ⇧⇩keys, confirm with ENTER. “P2” parameter appears.
P2 (40%)
Set the manometer in pressure up to 40% of full scale, confirm through ENTER, a value
appears, adjust the value through ⇧⇩keys, confirm with ENTER. “P3” parameter appears.
P3 (60%)
Set the manometer in pressure up to 60% of full scale, confirm through ENTER, a value
appears, adjust the value through ⇧⇩keys, confirm with ENTER. “P4” parameter appears.
P4 (80%)
Set the manometer in pressure up to 80% of full scale, confirm through ENTER, a value
appears, adjust the value through ⇧⇩keys, confirm with ENTER. “P5” parameter appears.
P5 (F.S.)
Set the manometer in pressure up to 100% of full scale, confirm through ENTER, a value
appears, adjust the value through ⇧⇩keys, confirm with ENTER. “P6” parameter appears.
P6 (vacuum)
Set the manometer in vacuum at -1 bar, confirm through ENTER, a value appears, adjust the
value through ⇧⇩keys, confirm with ENTER. “dp” parameter appears.
17.3. DECIMAL POINT
Selectable values 0…4
Set decimal point through ⇧⇩keys, confirm with ENTER. Instrument exits from calibration
and comes back to main page to show the pressure.

18. ZERO FUNCTION
The ZERO function is used to set the instrument indication to zero.
The displayed value of the instrument, before function activation, will be deducted from
measured value, the result (0) is showed on the display. The function acts on the entire
measurement range (100%).
The function status is stored permanently. At instrument start the function comes back to the
status stored before switching off. When the ZERO function is activated, then the ZERO LED
placed on the front panel is switched on.
To activate the ZERO function, keep pressed ZERO for about 5 seconds. To deactivate the
function keep pressed ZERO for about 10 seconds.
The ZERO function is also available as a remote digital input.
19. PEAK FUNCTION
The PEAK function detects the minimum and maximum value of a measurement. To enable
the function press PEAK, when the function is activated, the display lights. The reading
speed is proportional to the used filter value. In order to work at max speed, set filter = 0
(10 msec).
When the instrument will be switched off, then the PEAK function will deactivated.
The PEAK function is also available as remote digital input (terminals 14-15).
20. HOLD FUNCTION
The HOLD function locks the instrument display. The HOLD function is associated to remote
digital inputs only.
The HOLD function activation/deactivation is got by opening/closing the remote digital input
associated to terminals 20-21.

21. SERIAL COMMUNICATION COMMANDS
The serial communication is made through reading and writing commands in ASCII codes.
When a command is recognized, then the instrument answers with the string:
$ II ACK <cr>
$ASCII CHAR $(36 ) String beginning
II 00 ASCII CHAR $(48)$(48) Identification Number
ACK ASCII CHAR $(6) Recognized command
<cr> ASCII CHAR $(13) String Terminator
Communication protocol : Baud, N, 8, 1
Baud = 4800, 9600, 19200
WRITING COMMANDS
MESSAGE
ANSWER
VALUE
ZERO ENABLED
$ZEII<cr>
$IIACK<cr>
ZERO DISABLED
$ZDII<cr>
$IIACK<cr>
PEAK ENABLED
$PEII<cr>
$IIACK<cr>
PEAK DISABLED
$PDII<cr>
$IIACK<cr>
PEAK TYPE
$PSIIN<cr>
$IIACK<cr>
N=0=Peak+
N=1=Peak-
DIGITAL FILTER
$FDIIN<cr>
$IIACK<cr>
RESOLUTION
$RDIINNN<cr>
$IIACK<cr>
NNN=1 2 5 10 20 50 100
SET-POINT 1
$P1IISNNNNN<cr>
$IIACK<cr>
NNNNN = 0÷99999
SET-POINT 2
$P2IISNNNNN<cr>
$IIACK<cr>
NNNNN = 0÷99999
HYSTERESIS 1
$D1IINNNN<cr>
$IIACK<cr>
NNNN = 0÷9999
HYSTERESIS 2
$D2IINNNN<cr>
$IIACK<cr>
NNNN = 0÷9999
ANALOG OUTPUT FS
$OAIISNNNNN<cr>
$IIACK<cr>
NNNNN = 0÷99999
CALIBRATION RESET
$CRII<cr>
$IIACK<cr>
FIELD 1
$I1IINNNNNNNNNNNNNNNN<cr>
$IIACK<cr>
N = ASCII char
FIELD 2
$I2IINNNNNNNNNNNNNNNN<cr>
$IIACK<cr>
N = ASCII char
FIELD 3
$I3IINNNNNNNNNNNNNNNN<cr>
$IIACK<cr>
N = ASCII char
DECIMAL POINT
$DPIIN<cr>
$IIACK<cr>
N = 05
READING COMMANDS
MESSAGE
ANSWER
MEASUREMENT VALUE
$DAII?<cr>
$IISNNNNNNUUU<cr>
DIGITAL FILTER
$FDII?<cr>
$IIN<cr>
RESOLUTION
$RDII?<cr>
$IINNN<cr>
PEAK TYPE
$PSII?<cr>
$IIPEAK+<cr> or $IIPEAK-<cr>
SET-POINT 1
$P1II?<cr>
$IISNNNNN<cr>
SET-POINT 2
$P2II?<cr>
$IISNNNNN<cr>
HYSTERESIS 1
$D1II?<cr>
$IINNNN<cr>
HYSTERESIS 2
$D2II?<cr>
$IINNNN<cr>
ANALOG OUTPUT F.S.
$OAII?<cr>
$IISNNNNN<cr>
FIELD 1
$I1II?<cr>
$IINNNNNNNNNNNNNNNN<cr>
FIELD 2
$I2II?<cr>
$IINNNNNNNNNNNNNNNN<cr>
FIELD 3
$I3II?<cr>
$IINNNNNNNNNNNNNNNN<cr>
DECIMAL POINT
$DPII?<cr>
$IIN<cr>