Simex SRP-N118 User manual

Assisting the automation
industry since 1986
User manual
METER
SRP-N118
•Firmware: v.6.00 or higher
•Input type: 0/4-20 mA, 0/1-5V, 0/2-10V
•all mounting case IP 67
Read the user's manual carefully before starting to use the unit or software.
Producer reserves the right to implement changes without prior notice.
2014.12. 0 SRP-N118_INSSXEN_v.2.10.002

User manual - METER SRP-N118
CONTENTS
1. BASIC REQUIREMENTS AND USER SAFETY........................................................................................3
2. GENERAL CHARACTERISTICS................................................................................................................4
3. TECHNICAL DATA......................................................................................................................................5
4. DEVICE INSTALLATION............................................................................................................................7
4.1. UNPACKING.......................................................................................................................................7
4.2. ASSEMBLY........................................................................................................................................7
4.3. CONNECTION METHOD...................................................................................................................8
4.4. MAINTENANCE................................................................................................................................19
5. FRONT PANEL DESCRIPTION................................................................................................................20
6. PRINCIPLE OF OPERATION...................................................................................................................21
6.1. MEASUREMENT MODE..................................................................................................................21
6.2. DETECTION OF THE PEAK VALUES............................................................................................22
6.3. CONTROL OF THE RELAY OUTPUTS..........................................................................................23
6.3.1. O e threshold mode................................................................................................................24
6.3.2. Two thresholds mode..............................................................................................................25
7. DEVICE PROGRAMMING.........................................................................................................................26
7.1. PROGRAMMING MENU..................................................................................................................26
7.2. PARAMETERS EDITION.................................................................................................................27
7.2.1. Numeric parameters (digit cha ge mode)...............................................................................27
7.2.2. Numeric parameters (slide cha ge mode)..............................................................................27
7.2.3. Switch parameters (“LIST” type).............................................................................................28
7.3. MENU DESCRIPTION.....................................................................................................................28
7.3.1. “rEL1” me u.............................................................................................................................29
7.3.2. “i Pt” me u..............................................................................................................................31
7.3.3. ”OutP” me u............................................................................................................................36
7.3.4. ”bri” parameter.........................................................................................................................38
7.3.5. ”HOLd” me u...........................................................................................................................38
7.3.6. ”SECu” me u...........................................................................................................................39
7.3.7. ”rS” me u.................................................................................................................................39
7.3.8. ”Edit” parameter......................................................................................................................40
7.3.9. ”dEFS” parameter....................................................................................................................40
7.3.10. ”SErv” me u..........................................................................................................................40
7.4. MENU STRUCTURE........................................................................................................................41
. THE ALARM LED......................................................................................................................................43
9. OVER-CURRENT PROTECTION.............................................................................................................43
10. DISPLAYED VALUES CALCULATION..................................................................................................43
10.1. ADDITIONAL CALCULATIONS (USED CONVERSION CHARACTERISTIC).............................43
10.1.1. Li ear characteristic..............................................................................................................44
10.1.2. Square characteristic............................................................................................................44
10.1.3. Square root characteristic.....................................................................................................45
10.1.4. User defi ed characteristic...................................................................................................45
10.1.5. Volume characteristics of a cyli drical ta k..........................................................................46
10.2. EXAMPLES OF CALCULATIONS.................................................................................................47
11. THE MODBUS PROTOCOL HANDLING...............................................................................................52
11.1. LIST OF REGISTERS....................................................................................................................52
11.2. TRANSMISSION ERRORS DESCRIPTION..................................................................................56
11.3. EXAMPLES OF QUERY/ANSWER FRAMES...............................................................................56
12. DEFAULT AND USER'S SETTINGS LIST.............................................................................................59
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User manual - METER SRP-N118
Explanation of symbols used in the manual:
- This symbol de otes especially importa t guideli es co cer i g the i stallatio a d
operatio of the device. Not complyi g with the guideli es de oted by this symbol
may cause a accide t, damage or equipme t destructio .
IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS
RESPONSIBLE FOR POSSIBLE DAMAGES.
- This symbol de otes especially importa t characteristics of the u it.
Read a y i formatio regardi g this symbol carefully
1. BASIC REQUIREMENTS AND USER SAFETY
- The manufacturer is not responsible for any damages caused by
inappropriate installation, not maintaining the proper environmental
conditions and using the unit contrary to its assignment.
- Installation should be conducted by qualified personnel . During installation all
available safety requirements should be considered. The fitter is responsible for
executing the installation according to this manual, local safety and EMC
regulations.
- If the device is equipped with PE connector, it should be connected to PE wire.
Otherwise PE wire should be connected to GND connector.
- The unit must be properly set-up, according to the application. Incorrect
configuration can cause defective operation, which can lead to unit damage or
an accident.
- If in the case of a unit malfunction there is a risk of a serious threat to the
safety of people or property additional, independent systems and
solutions to prevent such a threat must be used.
- The unit uses dangerous voltage that can cause a lethal accident. The unit
must be switched off and disconnected from the power supply prior to
starting installation of troubleshooting (in the case of malfunction).
- Neighbouring and connected equipment must meet the appropriate standards
and regulations concerning safety and be equipped with adequate overvoltage
and interference filters.
- Do not attempt to disassemble, repair or modify the unit yourself. The unit
has no user serviceable parts. Defective units must be disconnected and
submitted for repairs at an authorized service centre.
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User manual - METER SRP-N118
- Do not use the unit in areas threatened with excessive shocks, vibrations, dust,
humidity, corrosive gasses and oils.
- Do not use the unit in areas where there is risk of explosions.
- Do not use the unit in areas with significant temperature variations, exposure to
condensation or ice.
- Do not use the unit in areas exposed to direct sunlight.
- Make sure that the ambient temperature (e.g. inside the control box) does not
exceed the recommended values. In such cases forced cooling of the unit must
be considered (e.g. by using a ventilator).
The unit is designed for operation in an industrial environment and must
not be used in a household environment or similar.
2. GENERAL CHARACTERISTICS
The RP-N118 meter is equipped with one current input 0-20 / 4-20mA and one voltage
input 0-5 / 1-5 / 0-10 / 2-10V. Current input has additionally overcurrent protection circuit,
which protects standard resistor. The selection of active input is realised by software, and
selected input can be changed at any time. Additionally the RP-N118 allows user to select a
conversion characteristic of several kinds: linear, square, square root, user defined (max.20
points length) and volume characteristics of a cylindrical tank in the vertical and horizontal
position. Result is showed on 4-digit LED display. Displayed values range can be selected by
user, from -999 to 9999, plus decimal point.
The device can be equipped with two relay (or OC type) outputs. Optionally RP-N118
with one relay (or OC type) output can be equipped with active current output, passive isolated
current output or active voltage output. Device RP-N118 is equipped with RS-485 / Modbus
RTU communication interface and sensor supply output. The meter can be ordered in two
power supply versions.
The device has 4 buttons being used for main presets programming. To get high
protection level, the keyboard is mounted under transparent cover. To allow user to change
presets without opening the cover, an IR sensor is mounted. Remote controller keyboard is
equivalent to the device keyboard (Note, that remote controller is not a part of the RP-N118
set – it is an additional equipment).
RP-N118 can be used for controlling and regulation of processes need proportional and
threshold control like: temperature processes (heating or cooling), valves controlling or other.
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User manual - METER SRP-N118
3. TECHNICAL DATA
Power supply voltage
(depending on version)
External fuse (required)
Power consumption
85...230...260V AC/DC; 50 ÷ 60 Hz (separated)
or 19...24...50V DC and 16...24... 5V AC (separated)
T - type, max. 2 A
max. 5 VA @ 85 ÷ 260V AC/DC
max. 5 VA @ 16V ÷ 5V AC
max. 5 W @ 19V ÷ 50V DC
Current input 0÷20 mA, 4÷20 mA overload protected,
maximum input current about 40 mA
Current measurement accuracy ± 0,1% @ 25°C; ± one digit (for 0÷20 mA range)
Current input resistance < 65 Ω (typical 55 Ω)
Accepted prolonged input overload: 20%
Voltage input 0÷5 V, 1÷5 V, 0÷10 V, 2÷10 V
Voltage measurement accuracy ± 0,1% @ 25°C; ± one digit (for 0÷10 V range)
Voltage input resistance > 50 kΩ
Accepted prolonged input overload: 20%
ensor power supply output 24V +5%, -10% / max. 100 mA, stabilized
Relay output 0, 1 or 2 NO, 1A/250V AC (cos ϕ = 1)
OC-type output 0, 1 or 2; 0mA / 0VDC / 100mW
Active current output
(optional, for one relay or one
OC-type output version only)
range max. 0 ÷ 24 mA
Load resistance max. 700 Ω
Passive isolated current output
(optional, for one relay or one
OC-type output version only)
range max. 2.8 ÷ 24 mA
Supply voltage Us = 9.5 ÷ 6V
Load resistance max. (Us – 9.5V) / 24mA [kΩ]
5

User manual - METER SRP-N118
Active voltage output
(optional, for one relay or one
OC-type output version only)
range max. 0 ÷ 11V
Load resistance min. 2000 Ω
Temperature stability 50 ppm / °C
Display range -999 ÷ 9999, plus decimal point
Communication interface RS 485, 8N1 and 8N2, Modbus RTU, not separated
Baud rate 1200 bit/s ÷ 115200 bit/s
Display
(depending on version)
LED, 4 digit, 20mm height, red or
LED, 4 digit, 20mm height, green
Data memory non-volatile memory, EEPROM type
Protection level IP 67
Housing type
Housing material
Housing dimensions
without glands:
with glands:
wall mounted
ABS + fibreglass
110 x 80 x 67 mm
110 x 105 x 67 mm
Operating temperature 0°C do +50°C
or -20°C to +50°C
Storage temperature -10°C do +70°C
or -20°C to +70°C
Humidity
Altitude
5 to 90% no condensation
up to 2000 meters above sea level
Screws tightening max. torque 0,5 Nm
Max. connection leads cross section mm2 (for connectors 1÷6) or
2 mm2 (for connectors 7÷16)
Safety requirements according to: PN-EN 61010-1
installation category: II
pollution degree: 2
voltage in relation to ground: 00V AC
insulation resistance: >20MΩ
insulation strength between power supply and
input/output terminal: 1min. @ 2 00V
insulation strength between relays terminal:
1min. @ 1 50V
EMC according to: PN-EN 61 26-1
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User manual - METER SRP-N118
This is a class A unit. In a residential or a similar area it can cause radio
frequency interference. In such cases the user can be requested to use
appropriate preventive measures.
4. DEVICE INSTALLATION
The unit has been designed and manufactured in a way assuring a high level of user
safety and resistance to interference occurring in a typical industrial environment. In order to
take full advantage of these characteristics installation of the unit must be conducted correctly
and according to the local regulations.
- Read the basic safety requirements on page 3 prior to starting the installation.
- Ensure that the power supply network voltage corresponds to the nominal
voltage stated on the unit’s identification label.
- The load must correspond to the requirements listed in the technical data.
- All installation works must be conducted with a disconnected power supply.
- Protecting the power supply connections against unauthorized persons must be
taken into consideration.
4.1. UNPACKING
After removing the unit from the protective packaging, check for transportation damage. Any
transportation damage must be immediately reported to the carrier. Also, write down the unit
serial number located on the housing and report the damage to the manufacturer.
Attached with the unit please find:
- user’s manual,
- warranty,
4.2. ASSEMBLY
- Disconnect the power supply prior to starting assembly.
- Check the connections are wired correctly prior to switching the unit on.
To install device on the wall, a pinholes should be made. Figure 4.1 presents
dimensions of the device and distances between holes. The back side of the device
has four mounting holes. This part of the case should be mounted to a wall by
screws.
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User manual - METER SRP-N118
Figure 4.1. Device a d assembly dime sio s
4.3. CONNECTION METHOD
Caution
- Installation should be conducted by qualified personnel . During installation all
available safety requirements should be considered. The fitter is responsible for
executing the installation according to this manual, local safety and EMC
regulations.
- The unit is not equipped with an internal fuse or power supply circuit breaker.
Because of this an external time-delay cut-out fuse with a small nominal current
value must be used (recommended bipolar, max. 2A) and a power supply circuit-
breaker located near the unit. In the case of using a monopolar fuse it must be
mounted on the phase cable (L).
- The power supply network cable diameter must be selected in such a way that in
the case of a short circuit of the cable from the side of the unit the cable shall be
protected against destruction with an electrical installation fuse.
- Wiring must meet appropriate standards and local regulations and laws.
- In order to secure against accidental short circuit the connection cables must be
terminated with appropriate insulated cable tips.
- Tighten the clamping screws. The recommended tightening torque is 0.5 Nm.
Loose screws can cause fire or defective operation. Over tightening can lead to
damaging the connections inside the units and breaking the thread.
- In the case of the unit being fitted with separable clamps they should be inserted
into appropriate connectors in the unit, even if they are not used for any
connections.
- Unused terminals (marked as n.c.) must not be used for connecting any
connecting cables (e.g. as bridges), because this can cause damage to the
equipment or electric shock.
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110 mm
80 mm
67 mm
90 mm
60 mm
ø8.4
ø4.4

User manual - METER SRP-N118
- If the unit is equipped with housing, covers and sealing to, protecting against
water intrusion, pay special attention to their correct tightening or clamping. In the
case of any doubt consider using additional preventive measures (covers, roofing,
seals, etc.). Carelessly executed assembly can increase the risk of electric shock.
- After the installation is completed do not touch the unit’s connections when it is
switched on, because it carries the risk of electrical shock.
Due to possible significant interference in industrial installations appropriate measures
assuring correct operation of the unit must be applied. To avoid the unit of improper
indications keep recommendations listed below.
–Avoid running signal cables and transmission cables together with power supply cables
and cables controlling inductive loads (e.g. contactors). Such cables should cross at
a right angle.
–Contactor coils and inductive loads should be equipped with interference protection
systems, e.g. RC-type.
–Use of screened signal cables is recommended. Signal cable screens should be
connected to the earthing only at one of the ends of the screened cable.
–In the case of magnetically induced interference the use of twisted pair of signal cables is
recommended. Twisted pair (best if shielded) must be used with RS-485 serial
transmission connections.
–In the case of measurement or control signals are longer than 0m or go outside of the
building then additional safety circuits are required.
–In the case of interference from the power supply side the use of appropriate interference
filters is recommended. Bear in mind that the connection between the filter and the unit
should be as short as possible and the metal housing of the filter must be connected to
the earth with the largest possible surface. The cables connected to the filter output must
not be run with cables with interference (e.g. circuits controlling relays or contactors).
Connection of the power supply, and the measurement and controlling signals should be
made by clamping connectors mounted inside the housing.
a) b)
Figure 4.2. Recomme ded dime sio s of cable strippi g
a) for big co ectors (1 to 6), b) for small co ectors (7 to 16)
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5 mm
max. 1.6 mm
6 mm
max. 2 mm

User manual - METER SRP-N118
Figure 4.3. Method of co ecti g cables to the clamping co ectors
All connections must be made while power supply is disconnected !
Figure 4.4. Termi als descriptio (relay outputs)
10
!
Power supply
(depending
on version)
(option)
R2
(option)
R1
24V (+5%, -10%)
Imax = 100 mA
+ Uo -
DATA+
DATA-
GND
R - 485
PE
0/1 - 5V
0/2 - 10V
GND +
GND +
0/4 - 20mA
n.c. n.c.
34 12
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User manual - METER SRP-N118
Figure 4.5. Termi als descriptio (OC-type outputs)
Figure 4.6. Termi als descriptio (relay a d active curre t outputs)
11
24V (+5%, -10%)
Imax = 100 mA
+ Uo -
DATA+
DATA-
GND
R - 485
PE
0/1 - 5V
0/2 - 10V
GND +
GND +
0/4 - 20mA
n.c. n.c.
OC1, OC2: Umax = 0V DC,
Imax = 0mA, Pmax = 100mW
- +- +
(option)
OC1
(option)
OC2
Power supply
(depending
on version)
34 12
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(option)
R1
24V (+5%, -10%)
Imax = 100 mA
+ Uo -
DATA+
DATA-
GND
R - 485
PE
0/1 - 5V
0/2 - 10V
GND +
GND +
0/4 - 20mA
n.c. n.c.
ACTIVE
current output
(option)
- +
Power supply
(depending
on version)
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User manual - METER SRP-N118
Figure 4.7. Termi als descriptio (OC-type a d active curre t outputs)
Figure 4.8. Termi als descriptio (relay a d passive curre t outputs)
12
24V (+5%, -10%)
Imax = 100 mA
+ Uo -
DATA+
DATA-
GND
R - 485
PE
0/1 - 5V
0/2 - 10V
GND +
GND +
0/4 - 20mA
n.c. n.c.
OC1: Umax = 0V DC,
Imax = 0mA, Pmax = 100mW
- +
(option)
OC1 ACTIVE
current output
(option)
- +
Power supply
(depending
on version)
34 12
141516 56 12 11 10 9 8 713
(option)
R1
24V (+5%, -10%)
Imax = 100 mA
+ Uo -
DATA+
DATA-
GND
R - 485
PE
0/1 - 5V
0/2 - 10V
GND +
GND +
0/4 - 20mA
n.c. n.c.
Passive, isolated
current output
4÷20mA
(option)
Power supply
(depending
on version)
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User manual - METER SRP-N118
Figure 4.9. Termi als descriptio (OC-type a d passive curre t outputs)
Figure 4.10. Termi als descriptio (relay a d active voltage outputs)
13
24V (+5%, -10%)
Imax = 100 mA
+ Uo -
DATA+
DATA-
GND
R - 485
PE
0/1 - 5V
0/2 - 10V
GND +
GND +
0/4 - 20mA
n.c. n.c.
OC1: Umax = 0V DC,
Imax = 0mA, Pmax = 100mW
- +
(option)
OC1
Passive, isolated
current output
4÷20mA
(option)
Power supply
(depending
on version)
34 12
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(option)
R1
24V (+5%, -10%)
Imax = 100 mA
+ Uo -
DATA+
DATA-
GND
R - 485
PE
0/1 - 5V
0/2 - 10V
GND +
GND +
0/4 - 20mA
n.c. n.c.
ACTIVE
voltage output
(option)
- +
Power supply
(depending
on version)
34 12
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User manual - METER SRP-N118
Figure 4.11. Termi als descriptio (OC-type a d active voltage outputs)
Figure 4.12. Co ectio of 2-wire curre t co verters
Figure 4.13. Co ectio of 3-wire curre t co verters
14
13 12 11 10 9 8 7
24V DC
+ -
+
-
-
+
13 12 11 10 9 8 7
internally connected
+ -
13 12 11 10 9 8 7
24V DC
+ -
+
-
-
+
13 12 11 10 9 8 7
internally connected
+ -
24V (+5%, -10%)
Imax = 100 mA
+ Uo -
DATA+
DATA-
GND
R - 485
PE
0/1 - 5V
0/2 - 10V
GND +
GND +
0/4 - 20mA
n.c. n.c.
OC1: Umax = 0V DC,
Imax = 0mA, Pmax = 100mW
- +
(option)
OC1 ACTIVE
voltage output
(option)
- +
Power supply
(depending
on version)
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User manual - METER SRP-N118
Figure 4.14. Co ectio of voltage co verters
Depe di g o versio :
85...230...260V AC/DC; 50 ÷ 60 Hz or
19...24...50V DC a d 16...24...35V AC
Figure 4.15. Co ectio of power supply a d relays
Contacts of relay outputs are not equipped with spark suppressors. While use
the relay outputs for switching of inductive loads (coils, contactors, power
relays, electromagnets, motors etc.) it is required to use additional
suppression circuit (typically capacitor 47nF/ min. 250VAC in series with
100R/5W resistor), connected in parallel to relay terminals or (better) directly
on the load. In consequence of using the suppression circuit, the level of
generated electromagnetic disturbances is lower, and the life of relay contacts
rises.
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13 12 11 10 9 8 7
24V DC
+ -
-
+
13 12 11 10 9 8 7
+
-
+
+
internally connected
+ -
FU E
R1 R2
5 4 36
N L
FU E
N L
12

User manual - METER SRP-N118
a) b)
Figure 4.16. Examples of suppressio circuit co ectio :
a) to relay termi als; b) to the i ductive load
Figure 4.17. Example of OC-type outputs co ectio
Figure 4.18. Example of active curre t outputs co ectio
(for device with active curre t output o ly)
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N
6 5 6 5
LL
N
!
6 5
8 7
+ - - +
OC1Uo
- +
voltage input
24V
Logic controller
6 5
8 7
R
2k2 LED 10 mA
+ -
Uo OC1
- +
+
Current input
0-20 mA
-
Logic controller
4 3
- +
ACTIVE
current output

User manual - METER SRP-N118
Figure 4.19. Example of passive curre t outputs co ectio
(for device with passive curre t output o ly)
Figure 4.20. Example of active voltage outputs co ectio
(for device with active voltage output o ly)
a) b)
Figure 4.21. Co ectio s of 2-wire se sor:
a) active b) passive ( eeds additio al supply)
17
12 11
+
-
Current source
0 - 20mA or
4 - 20mA
12 11 10 9 8 7
+
-
Connected internally
4 3
8 7
PA IVE
Current output
Uo
+ -
Isolation loss
!
+
Current input
4-20mA
-
Logic controller
+
voltage input
0 - 10V
-
Logic controller
4 3
- +
ACTIVE
voltage output

User manual - METER SRP-N118
RP-N118 meter has no galvanic separation between measurement input and RS-
485 interface. If serial connection of multiple units is made or serial connection with
other device, without galvanic separation of RS-485 interface, is made then RS-485
interface separators must to be used certainly (Figure 4.22, 4.23). If RS-485
interfaces are isolated or not used then the separators are not necessary.
Figure 4.22. Serial co ectio of active 2-wire se sor with RP-N118 u it
a d other curre t measureme t device (e.g. PLC co troller).
Figure 4.23. Serial co ectio of passive 2-wire se sor with RP-N118 u it
a d other curre t measureme t device (e.g. PLC co troller).
If device B (Figure 4.22, 4.23) is equipped with galvanic separated input or if
different potentials between A and B devices signal grounds are allowed (e.g. if RS-
485 interface is separated or unused), current loop can be closed without separator
G.
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!
-
+
Current source
0 - 20mA or
4 - 20mA
12 11 10 9 8 7
Connected internally
G
galvanic
isolation
+
-
A
B
+
-
RB
-
+
12 11 10 9 8 7
Connected internally
G
galvanic
isolation
+
-
A
B
+
-
RB

User manual - METER SRP-N118
Calculation of maximal allowable resistance of separator's input
Maximal resistance of the input (RG max.) and wires (RW max.) are calculated for circuit from
Figure 4.23. Used symbols are described below.
US min. - minimal sensor supply voltage (given in technical data of sensor),
Ug- voltage drop on galvanic separator input (constant for 4-20 mA range of
current),
Imax. = 20 mA - maximal current of current loop,
UO= 24V - sensor supply output voltage of device A,
RO= 0 Ω- sensor supply output resistance of device A,
RINP. = 50 Ω- measurement input resistance of device A,
RG max.Rmax.=UO−US min.−Ug
Imax
−RINP.−RO
Let US min.=12V and Ug=5V then:
RG max.Rmax.=24−12−3,5
0,02 −50−30=270
If current loop is closed without the separator G, then sum of measurement input resistance
(RB max.) of device B (Figure 4.23) and connections resistance (RW max.) should be not grater
than result of given below formula:
RB max.Rmax.=UO−US min.
Imax
−RINP.−RO
For example if US min.=12V then:
RB max.Rmax.=24−12
0,02 −50−30=520 
4.4. MAINTENANCE
The unit does not have any internal replaceable or adjustable components available to
the user. Pay attention to the ambient temperature in the room where the unit is operating.
Excessively high temperatures cause faster ageing of the internal components and shorten the
fault-free time of the unit's operation.
In cases where the unit gets dirty do not clean with solvents. For cleaning use warm water with
small amount of detergent or in the case of more significant contamination ethyl or isopropyl
alcohol.
Using any other agents can cause permanent damage to the housing.
Product marked with this symbol should not be placed in municipal waste. Please
check local regulations for disposal of electronic products.
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User manual - METER SRP-N118
5. FRONT PANEL DESCRIPTION
Symbols and functions of push-buttons:
Symbol used in the manual: [E C/MENU]
Functions:
• Enter to main menu ( press and hold by at least 2 sec.)
• Exit the current level and Enter to previous menu (or measure mode)
• Cancel the changes made in parameter being edited
Symbol used in the manual: [ENTER]
Functions :
• Start to edit the parameter
• Enter to the sub-menu,
• Confirmation of changes made in parameter being edited
Symbol used in the manual: [^] [v]
Functions :
• Change of the present menu,
• Modification of the parameter value,
• Change of the display mode.
20
MENU
E C
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AL R1 R2
i frared
receiver
alarm LED i dicator (AL)Thresholds exceedi g
LED i dicators (R)
display
programmi g pushbutto s