Simex SRT-457 User manual

Assisting the automation
industry since 1986
User manual
METER
SRT-457
Firmware: v.5.18 or higher
Input type: Pt100/500/1000
Wall mounting case IP 65 / IP 67
2013.06.06 SRT-457_INSSXEN_v.2.06.001
Microlectra bv.
Read the user's manual carefully before starting to use the unit or software.
Producer reserves the right to implement changes without prior notice.
Microlectra bv.
Augustapolder 12. 2992 SR Barendrecht. The Netherlands.
www.microlectra.nl [email protected]

User manual - METER SRT-457
CONTENTS
1. BASIC REQUIREMENTS AND USER SAFETY........................................................................................3
2. GENERAL CHARACTERISTICS................................................................................................................4
3. TECHNICAL DATA......................................................................................................................................4
4. DEVICE INSTALLATION............................................................................................................................5
4.1. UNPACKING.......................................................................................................................................6
4.2. ASSEMBLY........................................................................................................................................6
4.3. CONNECTION METHOD...................................................................................................................7
4.4. MAINTENANCE................................................................................................................................12
5. FRONT PANEL DESCRIPTION................................................................................................................12
6. PRINCIPLE OF OPERATION...................................................................................................................13
6.1. MEASUREMENT MODE..................................................................................................................13
6.2. DETECTION OF THE PEAK VALUES............................................................................................13
6.3. CONTROL OF THE RELAY OUTPUTS..........................................................................................14
6.3.1. One threshold mode................................................................................................................15
6.3.2. Two thresholds mode..............................................................................................................17
7. DEVICE PROGRAMMING.........................................................................................................................18
7.1. PROGRAMMING MENU..................................................................................................................18
7.2. PARAMETERS EDITION.................................................................................................................19
7.2.1. Numeric parameters (digit change mode)...............................................................................19
7.2.2. Numeric parameters (slide change mode)..............................................................................19
7.2.3. Switch parameters (LIST type).............................................................................................19
7.3. MENU DESCRIPTION.....................................................................................................................20
7.3.1. rEL1 menu.............................................................................................................................20
7.3.2. bEEP menu...........................................................................................................................22
7.3.3. inPt menu..............................................................................................................................23
7.3.4. bri parameter.........................................................................................................................23
7.3.5. HOLd menu...........................................................................................................................23
7.3.6. SECu menu...........................................................................................................................24
7.3.7. rS menu.................................................................................................................................24
7.3.8. Edit parameter......................................................................................................................25
7.3.9. dEFS parameter....................................................................................................................25
7.3.10. SErv menu..........................................................................................................................25
7.4. MENU STRUCTURE........................................................................................................................26
8. THE MODBUS PROTOCOL HANDLING.................................................................................................28
8.1. LIST OF REGISTERS......................................................................................................................28
8.2. TRANSMISSION ERRORS DESCRIPTION....................................................................................31
8.3. EXAMPLES OF QUERY/ANSWER FRAMES.................................................................................31
9. DEFAULT AND USER'S SETTINGS LIST...............................................................................................33
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User manual - METER SRT-457
Explanation of symbols used in the manual:
- This symbol denotes especially important guidelines concerning the installation and
operation of the device. Not complying with the guidelines denoted by this symbol
may cause an accident, damage or equipment destruction.
IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS
RESPONSIBLE FOR POSSIBLE DAMAGES.
- This symbol denotes especially important characteristics of the unit.
Read any information regarding 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.
- GND input of device should be connected to PE wire;
- 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.
- 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.
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User manual - METER SRT-457
- 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).
2. GENERAL CHARACTERISTICS
The SRT-457 meter is equipped with Pt 100/Pt 500/Pt 1000 type input, with automatic
connection recognition ( three or four wire sensor). The measurement range spans from
-100 °C to +600 °C, and input is fully linearised accordingly to PN-EN60751+A2:1999
standard. Result is showed on 4-digit LED display.
The device can be equipped with one relay (or OC type) output. Device SRT-457 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 SRT-457 set
 it is an additional equipment).
Two waterproof, high IP protection ratings, wall mounted types of housing are available
(T-type and F-type), predispose the device to work in hard environment conditions.
3. TECHNICAL DATA
Power supply voltage
(depending on version)
External fuse (required)
Power consumption
85...230...260V AC/DC; 50 ÷ 60 Hz (separated)
19...24...50V DC and 16...24...35V AC (separated)
T - type, max. 2 A
max. 11 VA @ 85 ÷ 260V AC/DC
max. 11 VA @ 16V ÷ 35V AC
max. 8 W @ 19V ÷ 50V DC
Measurement input Pt 100/ Pt 500/Pt 1000 type with automatic
connection recognition ( 3 or 4-wires)
Measurement range -100°C ÷ +600°C
Measurement accuracy ± 0,1% @ 25°C; ± one digit
Measurement wires resistance max. 20 Ω(every wire)
Temperature stability 50 ppm / °C
Outputs
relay:
or OC-type:
sensor power supply UO:
0 or 1 NO, 1A/250V AC (cos ϕ = 1)
0 or 1; 30mA / 30VDC / 100mW
24V ±5% / max. 100 mA, stabilized
Communication interface RS 485, 8N1 and 8N2, Modbus RTU, not separated
Baud rate 1200 bit/s ÷ 115200 bit/s
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User manual - METER SRT-457
Display LED, 4 digit, 57mm height, red
Data memory non-volatile memory, EEPROM type
Protection level F-type casing:IP 65
T-type casing:IP 67
Housing type
Housing material
Wall mounted, T-type or F-type
ABS + fibreglass
Housing dimensions F-type casing: 213 x 185 x 118.2 mm
T-type casing: 230 x 140 x 96.5 mm
Operating temperature
(depending on version)
0°C to +50°C
or -20°C to +50°C
Storage temperature
(depending on version)
-10°C to +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 diameter 2,5 mm2
Safety requirements according to: PN-EN 61010-1
installation category: II
pollution degree: 2
voltage in relation to ground: 300V AC
insulation resistance: >20MΩ
insulation strength between power supply and
input/output terminal: 1min. @ 2300V
insulation strength between relays terminal:
1min. @ 1350V
EMC according to: PN-EN 61326-1
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.
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User manual - METER SRT-457
- 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.
Figure 4.1. Device and assembly dimensions of F-type case
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118.2 mm
213 mm
185 mm
69 mm198 mm
137mm
9.6 mm
ø5
ø10
ø5

User manual - METER SRT-457
Figure 4.2. Device and assembly dimensions of T-type case
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.
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230 mm
140mm
96.5 mm
212 mm
122 mm
ø8.4
ø4.4

User manual - METER SRT-457
- 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.
- 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 30m 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 screw connectors mounted inside the housing.
Figure 4.3. Method of cable insulation replacing and cable terminals
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User manual - METER SRT-457
Figure 4.4. Terminals description (relay outputs)
Figure 4.5. Terminals description (OC-type outputs)
All connections must be made while power supply is disconnected !
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1 2 5 6 7 8 9
GNDDATA+
DATA-
RS - 485
3 4
+24V ±5%
Imax = 100mA
10 11 12 13 14 15 16
R1
(optional)
-Uo +
Power
supply
(depending on version)
n.c.
Pt100/500/1000
Pt100/500/1000
+ -
1 2 5 6 7 8 9
GNDDATA+
DATA-
RS - 485
3 4 10 11 12 13 14 15 16
(optional)
OC1
OC1: Umax = 30V DC,
Imax = 30mA, Pmax = 100mW
+24V ±5%
Imax = 100mA
-Uo +
Power
supply
(depending on version)
n.c.
Pt100/500/1000
Pt100/500/1000

User manual - METER SRT-457
Depending on version:
85...230...260V AC/DC or
19...24...50V DC; 16...24...35V AC
Figure 4.6. Connection of power supply and 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.
a) b)
Figure 4.7. Examples of suppression circuit connection:
a) to relay terminals; b) to the inductive load
10
FUSE
1 2
L N
L N
3 4
FUSE
R1
!
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N
3 4 3 4
LL
N
!

User manual - METER SRT-457
Figure 4.8. Example of OC-type outputs connection
Temperature sensor can be connected to the device in typical 4-wire circuit (Figure 4.9a) or
3-wire circuit (Figure 4.9b). Due to precision of measurement 4-wire circuit is recommended.
If 2 wire circuit is used it is recommended to connect sensor accordingly to Figure
4.9c.(4-wires circuit with shorted pins 12+13 and 14+15). In this case, the
resistance of wires should be as small as possible, to avoid of measurement errors.
Measured value can be corrected (constant correction) using toFS parameter from
menu inPt. Due to low precision 2-wire connection is not recommended.
When 4-wires or 2-wires connection is used, the resistance of particular wires (Ra ÷ Rd)
CAN BE DIFFERENT. When 3-wires connection is used, the resistance of particular wires
(Ra ÷ Rd) MUST BE IDENTICAL to enable proper compensation of it's resistance. The
resistance of particular wire should not be greater than 20 ΩΩ.
a) b) c)
Figure 4.9. Connection of sensors:
a) 4-wires circuit; b) 3-wires circuit; c) 2-wires circuit;
The connection circuit should not be changed while unit is powered. Every change
of connection while the unit is powered causes measurement errors by several
seconds after change.
11
+ -
10 11
Uo
3 4
OC1
- +
+ -
voltage input
24 V
Logic controller
10 11
Uo
3 4
OC1
- +
+ -
R
2k2
LED 10 mA
Pt100
Ra Rb Rc Rd
Ra, Rb, Rc, Rd can be different
12 13 14 15
Pt100
Rb Rc Rd
13 151412
Rb = Rc = Rd
n.c.
Pt100
Rb Rc
13 1412 15
Rb, Rc can be different
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User manual - METER SRT-457
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.
5. FRONT PANEL DESCRIPTION
Symbols and functions of push-buttons:
Symbol used in the manual: [ESC/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.
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MENU
ESC
ENTER
MENU
ESC ENTER
R3 R4R1 R2
infrared
receiver
Thresholds exceeding
LED indicators (R)
display
programming
pushbuttons

User manual - METER SRT-457
6. PRINCIPLE OF OPERATION
After turning the power supply on, device ID and software version are showed on the
display, next the controller goes to the measurement mode.
6.1. MEASUREMENT MODE
In the measure mode, the measurement results, are displayed on the display. If the result
of measurement exceeds the permissible measurement range, warning -Hi- or -Lo- is
displayed rather than calculated result, depends on exceeded value. The warning can be
effect of measurement circuit malfunction. In that case -Lo- means shortcut and -Hi-
means break of measurement circuit.
In the measurement mode user can check main thresholds values. After pressing [^] or
[v] button, name of the threshold (e.g. rEL1) and his value will be displayed on the display
in alternating mode. If [^] or [v] will be pressed in 5 sec again, the next threshold will be
displayed, else the device comes back to the measurement mode. If a free access is enabled
(see description of SECu menu), user can change the value of particular threshold pressing
button [ENTER] (see: PARAMETERS EDITION).
All accessible parameters can be changed by entering the menu (see: DEVICE
PROGRAMMING). Use the local keyboard or the remote controller to do it. (Note: all
parameters can be remote changed via RS-485 interface).
Configuration of the device (via menu or RS-485 interface) do not stops measures.
6.2. DETECTION OF THE PEAK VALUES
The SRT-457 controller is equipped with peaks detection function. It can detect a peaks
of the input signal and display their values. Presets connected with this function are placed in
HOLd menu (see description of HOLd menu). The detection of the peak can be done if
the measured signal raises and drops of value at least equal to parameter PEA. Detected
peaks are displayed during the time defined by parameter timE. If a new peak will be
detected while one is displayed, this new peak will be displayed and display time counter will
be cleared (Figure 6.1). If no peaks are detected while time timE elapses,device starts to
show the current value of input signal again. If HdiS=HOLD then setting parameter
"timE"=0.0 causes holding peak value until [ESC] button is pressed. If HdiS=rEAL then
value "timE"=0.0 means no holding. Displaying peak value is signalized by flashing most right
decimal point.
The relays/LEDs can be controlled depend on the current value of input signal or the
peak value (see HOLd menu).
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User manual - METER SRT-457
Figure 6.1. Process of peaks detection
6.3. CONTROL OF THE RELAY OUTPUTS
The control of the object (measured signal) is realized via relay outputs. Front panel
LEDs named R indicates the state of particular relay output.
If device is not equipped with one or more relay outputs, menus refer to this relays
are available, but apply to LED indicators only. In such case LEDs indicates
exceeding of particular thresholds.
Modes of the control can be changed depend on the values of parameters SEtP, SEt2,
HYSt, modE, t on, toFF, unit and AL. Depend on modE parameter, relays
can be not used or controlled over one or two thresholds values.
If one threshold is used (Figure 6.2) the relay can be turned on (modE = on) or off
(modE = oFF) when the input signal value is contained in zone A. If two thresholds are
used (Figure 6.3) the relay will be turned on when value of input signal is contained in zone A
(modE = in) or zone B (modE = out) and turned off if the signal is contained in the
second one.
Figure 6.2. One threshold control of the relay/LED outputs
14
timE
measure
time
timE
PEA
PEA
real measurement result
display value
zone A
zone B
measure
SEtP parameter
HYSt parameter
state of
relay/LED
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User manual - METER SRT-457
Figure 6.3. Two threshold control of the relay/LED outputs
The relay outputs and LEDs (named R) can be controlled depend on both - the
current value and the peak value (when peak detection is active) of the input signal.
6.3.1. One threshold mode
Figure 6.4 presents the principle of relay outputs operation for one threshold mode, and
an example values of other parameters.
Description:
A, B, C, D - points where measured signal exceeds border values (expected value ± allowed deviation)
BON ,BOFF ,DON ,DOFF - relays state changes moments: (for t on > 0, toFF > 0)
tA,tB,tC,tD- time periods while input signal is in zone A or zone B
Figure 6.4. Principle of LED/relay output operation for one threshold mode
15
SEtP parameter
(expected signal value)
HYSt parameter
(allowed signal
deviation)
measured
signal
displayed value
time
time
time
AB
CD
relay state
(modE = on
t on = 0
toFF = 0)
relay state
(modE = on
t on > 0
toFF > 0)
tAtBtCtD
BON
DOFF
relay state
(modE = oFF
t on = 0
toFF = 0)
relay state
(modE = oFF
t on > 0
toFF > 0)
toFF
parameter
t on
parameter
BOFF
DON
time
time
closed
open
a)
b)
c)
d)
e)
open
closed
open
open
closed
closed
t on
parameter
toFF
parameter
zone A
zone B
zone B
zone A
zone B
measure
SEtP or SEt2 parameter
HYSt parameter
state of
relay/LED
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User manual - METER SRT-457
Parameter SEtP sets a threshold of the relay, and parameter HYSt sets a
hysteresis of the relay (Figure 6.4 a). The relay can change his state only when input value
exceeds (over or under) border value and tA,tB,tC,tD times (Figure 6.4) are bigger than the
time defined by parameters t on, toFF and unit.Border values means values equal
threshold+hysteresis and threshold-hysteresis respectively.
If t on and toFF parameters are set to 0, then the relay state will be changed
as soon as input value exceeds any of the border values (see points A and C, Figure 6.4 a,
b, c).
If values of t on or/and toFF are positive, then relay state will be turned on if the
input value exceeds the border values and stay bigger (or lower) during at least
t on (see points BON, DON, Figure 6.4 a, d, e). Similarly, the relay will be turned off if time
toFF elapse since the input signal value exceeds any of the border values (see points
BOFF, DOFF, Figure 6.4 a, d, e).
If tA,tB,tCor tD (when input signal stay in zone A or zone B) are lower than parameters t on
or toFF, the relay will not change his state (see points A and C, Figure 6.4 a, d, e).
The state of relay output while the input value exceeds the border values (points A, B, C,
D) is described by parameter modE. The relay can be turned on (modE = on), or
turned off (modE = oFF) when input signal value is contained in zone A (Figure 6.4 a).
The parameter AL allow user to set the relay output behaviour in critical situations (e.
g. Input values exceeds permissible measurement range). User can select that the relays
will be turned on, turned off,or not changed in critical situations.
All parameters connected with relay outputs are described in paragraph rEL1 menu.
16

User manual - METER SRT-457
6.3.2. Two thresholds mode
Objanienie:
A, B, C, D, E - points where measured signal exceeds border values (expected value ± allowed deviation)
BON ,BOFF ,CON ,COFF ,EON ,EOFF - relays state changes moments: (for t on > 0, toFF > 0)
tA,tB,tC,tD, tE- time periods while input signal is in zone A or zone B
Figure 6.5. Principle of LED/relay output operation for two thresholds mode
Figure 6.5 presents the principle of relay outputs operation for two thresholds mode, and an
example values of other parameters. In this mode parameter SEt2 is accessible in common
with SEtP, this parameter describes a second threshold of the relay output. The parameters
HYSt, modE, t on, toFF, unit and AL are connected with both SEtP and
SEt2 thresholds. While the controlling process, the relay output changes his state depends
of both SEtP and SEt2 thresholds in similar way as it was described in one threshold
mode.
If two threshold mode is used, modE parameter defines state of the relay output when
the input value occurs in a particular zone defined by border values of both thresholds. The
relay can be turned on if the input value is contained in zone A (modE = in) or zone B
(modE = out) and turned off if it is contained in the second one (Figure 6.5).
17
EOFF SEtP or SEt2
parameter
HYSt parameter
measure
d signal
displayed value
time
time
time
AB
C
D
relay state
(modE = in
t on = 0
toFF = 0)
relay state
(modE = in
t on > 0
toFF > 0)
tAtCtD
BON
relay state
(modE = out
t on = 0
toFF = 0)
relay state
(modE = out
t on > 0
toFF > 0)
toFF parameter
t on parameter
BOFF
EON
time
time
closed
open
a)
b)
c)
d)
e)
open
closed
open
open
closed
closed
t on parameter
toFF parameter
zone A
zone B
HYSt parameter
zone B COFF CON
E
t on parameter
toFF parameter
tBtE

User manual - METER SRT-457
The sequence of thresholds SEtP and SEt2 can be set in any order, due to the
control of relay outputs is done depend on difference between thresholds values
(zone A ) and outside of threshold values (zone B).
7. DEVICE PROGRAMMING
The device menu allow user to set all parameters connected to operation of
measurement input, control modes, critical situations behaviour, communication via RS-485
and access settings. The meaning of the particular parameters is described in paragraph
MENU DESCRIPTION.
Some of the parameters can be accessed without menu entering (quick view mode).
After pressing [^] or [v] button, name of the threshold (e.g.rEL1) and his value will be
displayed on the display in alternating mode. If [^] or [v] will be pressed in 5 sec again, the
next threshold will be displayed, else the device comes back to the measurement mode. If a
free access is enabled (see description of SECu menu), user can change the value of
particular threshold pressing button [ENTER] (see: PARAMETERS EDITION).
If particular parameter has been changed and confirmed in quick view mode, its
new value is displayed in alternating mode with parameter name by few seconds.
Confirmed changes may be checked or user can switch viewed parameter pressing
[^] or [v] button.
7.1. PROGRAMMING MENU
To enter main menu (being in the measurement mode) operator must to press and hold
at least 2 sec. [ESC/MENU] button.
If the user password is defined (see parameter Scod, menu SECU), operator have
to enter correct one before proceeding to menu options . Entering of the passwords is similar
to the edition of numeric parameters (see: PARAMETERS EDITION ),however presently editing
digit is showed only on the display, other digits are replaced by “-” sign.
After entering of last digit of the password first menu position will be displayed (if the password
is correct) or warning ”Err” in other case.
Pay attention when device parameters are being changed. If it is possible, turn off
controlled installation (machine).
Functions of the buttons while sub-menu and parameters choice:
Selection of sub-menu or parameter for editing. Name of selected item (sub-
menu or parameter) is displayed.
Operation of [ENTER] button depend on present menu position:
• if the name of some sub-menu is displayed - enter this sub-menu; name
of the first parameter (or next level sub-menu) is displayed,
• if the name of some parameter is displayed - enter the edition of this
parameter; present value of the parameter is displayed,
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ENTER
!

User manual - METER SRT-457
[ESC/MENU] button allow user to exit present menu level and goes to upper
level menu (or measurement mode).
After about 1 min. since last use of the buttons, device exits the menu mode and
returns to the measurement mode (only if no parameters are in editing mode).
7.2. PARAMETERS EDITION
To start edition of any parameter user should select name of desired one using [^] [v]
buttons and then press [ENTER].
7.2.1. Numeric parameters (digit change mode)
Numerical parameters are displayed as decimal numbers. The mode of its new value
entering depends on chosen edit method ( see parameter „Edit”).
In mode “by digit” („Edit”=”dig”) pressing one of the keys [^] or [v] causes change of
current position (flashing digit) or the sign (+/-). Short pressing of the [ENTER] button causes
change of the position (digit).
Press [ENTER] at least 2 seconds to accept the changes, after that question SEt? is
displayed, and user must to confirm (or cancel) the changes. To conform changes (and story it
in EEPROM) press [ENTER] button shortly after SEt? is displayed. To cancel the changes
press [ESC] button shortly after SEt? is displayed. After that device returns to the menu.
7.2.2. Numeric parameters (slide change mode)
In “slide change” mode („Edit”=”Slid”), buttons [^] and [v] has different functions.
To increase edited value press (or press and hold) [^] button only, the increasing
became quickest as long as button [^] is pressed. To slow down the increasing, button [v] can
be used. If [v] is pressed shortly (and button [^] is still pressed), increasing slow down for
a moment only, if [v] is pressed and held while button [^] is still pressed the increasing slow
down and will be kept on lower speed.
To decrease edited value press (or press and hold ) [v] button only. The decreasing
became quickest as long as button [v] is pressed. To slow down the decreasing, button [^]
can be used. If [^] is pressed shortly (and button [v] is still pressed), decreasing slow down for
a moment only, if [^] is pressed and held while button [v] is still pressed the decreasing slow
down and will be kept on lower speed.
Press [ENTER] at least 2 seconds to accept the changes, after that question Set? is
displayed, and user must to confirm (or cancel) the changes. To conform changes (and story it
in EEPROM) press [ENTER] button shortly after SEt? is displayed. To cancel the changes
press [ESC] button shortly after SEt? is displayed. After that device returns to the menu.
7.2.3. Switch parameters (LIST type)
Switch parameters can be described as a sets of values (a lists) out of which only one of
the options available on the list can be selected for the given parameter. Options of switching
parameter are selected using [^], [v] keys.
Short pressing of [ENTER] causes in displaying of the acknowledge question (SEt?). If
key [ENTER] is pressed again, the changes are accepted, stored in EEPROM end the edition
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ESC

User manual - METER SRT-457
process finished. Pressing the key [ESC] after SEt? causes in cancelling of made changes
and returning to menu.
Functions of buttons when editing numeric and switching parameters:
While editing numeric parameter:
• change of current (flashing) digit
• slide change of value (acceleration, deceleration, direction change)
While editing switch parameter - selection of switch parameter.
If numerical parameter is being edited, a short press of [ENTER] button
change edited position. A long press of [ENTER] button (at lest 2 sec.)
causes of display a SEt? ask, which allow user to make sure if change of
the parameter value is correct. If switch parameter is being edited, a short
press of [ENTER] button causes of display a SEt? ask. When [ENTER]
button is pressed again (while SEt? is displayed) the new value of the
parameter is stored in EEPROM memory.
Pressing this button operator can cancel the changes done up to now (if they
were not approved by [ENTER] button after the SEt? ask) and come back
to menu
7.3. MENU DESCRIPTION
- - - - - password checking. If some password different from „0000” is set, then every
enter to main menu follows the entering of password. If entered password is
correct then first menu position will be displayed else warning ”Err”, and unit
returns to measurement mode.
Due to problem with direct displaying of “m” and “K” letters, they are exchanged
with special signs “ “ for “m” and “ “ for K respectively. However, in user manual
letters „m” and “K” are used to make it more readable (example: modE, tc K).
7.3.1. rEL1 menu
This menu allows to configure the operation mode of relays and LEDs marked „R” (e.g. „R1”).
If there are few relay outputs available, then every output has its own configuration menu
(e.g. menu „rEL2” for relay (LED) „R2”). Principle of the relays operation is described in
paragraph CONTROL OF THE RELAY OUTPUTS.
• The relay outputs and LEDs (named R) can be controlled depend on both - the
current value and the peak value (when peak detection is active) of the input
signal.
•If device is not equipped with one or more relay outputs, menus refer to this
relays are available, but apply to LED indicators only. In such case LEDs
indicates exceeding of particular thresholds.
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MENU
ESC
ENTER