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PCE-SCI-L
USER’S MANUAL
ISOLATED
SIGNAL
CONVERTER
+
Kg
Weight
Load cell mV
-
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PCE Instruments
SIGNAL CONVERTER PCE-SCI-L
Signal converter for load cells and millivolts, isolated, industrial applications
Isolated signal converter for load cell signals and millivolts. Provides +5 Vdc excitation voltage to power the load cell, and ‘sense’ function to compensate for
excitation voltage variations. Accepts direct connection of 1, 2 3 or up to 4 load cells (typical 350 Ohm load cells). Accepts 4 and 6 wire load cells. Accepts
unipolar and bipolar ranges up ±80 mV.
Congurable output in 4/20 mA (active or passive) or 0/10 Vdc. Universal
USER’S MANUAL
INDEX
1. How to order . . . . . . . . . . . . . . . . . . . . . . . . .2
2. Material included . . . . . . . . . . . . . . . . . . . . . . 2
3. Additional information. . . . . . . . . . . . . . . . . . . . 2
4. Installation and start-up . . . . . . . . . . . . . . . . . . . 3
5. SOS mode . . . . . . . . . . . . . . . . . . . . . . . . . . 3
6. Messages . . . . . . . . . . . . . . . . . . . . . . . . . . 3
7. Practical load cell information . . . . . . . . . . . . . . . . 4
7.1 Number and type of cells accepted 4
7.2 Load cell and ‘sense’ wires 4
7.3 Millivolt mode 4
7.4 Load cell with external power 4
7.5 Connecting the cell to the ground 4
7.6 Connections with a junction box 5
7.7 How to calculate the input signal range 5
7.8 Connections with 3 or 4 load cells 5
8. Predened conguration codes . . . . . . . . . . . . . . .6
9. Connections and dimensions (mm (inch)) . . . . . . . . . . 7
10. Input signals . . . . . . . . . . . . . . . . . . . . . . . . 8
10.1 Load cell signals 8
10.2 Millivolts signals 9
11. Technical specications . . . . . . . . . . . . . . . . . 10
12. How to operate the instrument . . . . . . . . . . . . . . 12
12.1 Conguration system 12
12.2 ‘Normal mode’ of operation 12
12.3 How to operate the ‘Conguration menu’ 12
12.4 How to operate the ‘Force’ menu 13
12.5 How to activate the ‘Messages’ function 13
12.6 Fast and advanced congurations 13
13. Conguration menu. . . . . . . . . . . . . . . . . . . . 14
13.1 Function codes 14
13.2 Initial conguration 14
13.3 Output range 14
13.4 Advanced scaling 15
13.5 Field correction 16
13.6 Display information 16
13.7 Key ‘UP’ (‘force’ menu) 17
13.8 Key ‘LE’ (‘messages’ function) 17
13.9 ‘Tools’ menu 18
14. Full conguration menu. . . . . . . . . . . . . . . . . . 20
15. Factory default parameters. . . . . . . . . . . . . . . . 22
16. Error codes . . . . . . . . . . . . . . . . . . . . . . . . 22
17. Precautions on installation. . . . . . . . . . . . . . . . 23
18. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . 23
19. CE declaration of conformity . . . . . . . . . . . . . . . 23
power supply from 18 to 265 Vac/dc. 3 way isolation between input, output
and power circuits. Circuit isolation prevents ground loops and transient
propagation, protecting remote equipment and signal integrity.
Predened conguration codes available for fast and easy conguration.
Advanced conguration menu available to customize input and output
signal ranges to specic values required. ‘Tare’ function accessible from
front keypad. Conguration through front push-button keypad. Front display
available for conguration and system information (tare value, input signal
value, output signal value, congured label, signal percentage, process
value, excitation voltage and excitation current values).
Built-in ‘force’ functions to manually generate low and high output signals,
to validate remote instrumentation during installation. ‘SOS’ mode to help
on critical maintenance and repairs. Congurable power frequency rejection
lter. ‘Password’ function to block non-authorized access to ‘conguration
menu’.
Designed for industrial use, with potential integration into a wide range of
applications, reduced cost, excellent quality and available customization.
When the marks ‘Attention’ or ‘Risk of electrical shock’
appear, read the documentation for information about the
nature of the risk.
1. How to order
Reference Description
PCE-SCI-L Signal converter for load cells
2. Material included
The instrument is provided with the following elements:
• 1 x instrument PCE-SCI-L
• 4 x plug-in screw terminals
• 1 x quick installation guide
3. Additional information
User’s Manual
Datasheet
Quick installation guide
CE declaration
Warranty
Web www.pce-instruments.com
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PCE Instruments | www.pce-instruments.com
4. Installation and start-up
If this is the rst time you are conguring the instrument, below
are the steps to follow during a rst installation. Read all the
manual sections in order to have a full and clear view of the
characteristics of the instrument. Do not forget to read the installation
precautions at section 17.
1. Install the instrument at the DIN rail
2. Read how to operate the instrument (see section 12)
3. Read the ‘practical load cell information’ (see section 7)
4. Connect the input, the output and the power terminals (see section 9).
• error messages may appear in the process of connection (see
section 16), for example, if ‘sense’ is not yet connected, or there is
no current owing to the cell, because the cell is still not connected.
5. Congure the input and output signals
• choose a predened conguration code (see section 8)
• introduce the code at the instrument (see section 13.1)
6. If
needed, customize the input and output signal ranges (see section 13.4)
• if needed, correct the slope of the load cell using the ‘eld correction’
functions (see section 13.5) or manually operating the ‘input signal
low’ and ‘input signal high’ parameters (see section 13.4)
• if needed, apply a ‘tare’ to the system (see section 13.4)
7. If needed, congure the display reading (see section 13.6), the key ‘UP’
(5) ‘force’ menu (see section 13.7), and the key ‘LE’ (3) ‘messages’ function
(see section 13.8)
8. If needed, block access to the ‘conguration menu’ (see section 13.9)
5. SOS mode
The instrument includes a congurable ‘SOS mode’ function that provides
a way to manually congure a xed output signal. This output signal
remains xed, independent of the input signal value or sensor state.
This function allows to perform urgent maintenance or repair tasks at
the input section of the system, for example replacing damaged sensors,
while the instrument still provides a controlled signal that allows the
process to continue its activity, under human surveillance. When the
maintenance or repair task has been performed, the instrument can be
taken back to the standard working mode, where the output signal is
proportional to the input.
When manually activated, the ‘SOS mode’ generates the output signal
congured, and the front display remains ashing with the message
‘SoS’. All other systems are disabled, which means that :
• no error messages will be shown on display
• no key ‘UP’ (5) ‘fast access’ menu is accessible
• no key ‘LE’ (3) ‘messages’ function is accessible
• no ‘Eco’ mode activates
Only key ‘SQ’ (<) is accessible, to access the ‘conguration menu’
(eventually this access can be password locked) in order to deactivate
the ‘SOS mode’. Deactivation of ‘SOS mode’ must be performed manually
by conguring the function to ‘oFF’.
To congure the ‘SOS mode’ function, see section 13.9.
6. Messages
The instrument includes a congurable ‘messages’ function that provides
advanced information about the system, available to the operator with a
single click at the front key ‘LE’ (3).
This information is helpful during start-up, installation, system
verication, routine maintenance and troubleshooting, as messages and
values provide information on the actual input and output signal value,
actual percentage of the input signal compared to the full scale, scaled
process values and excitation voltage and excitation current provided to
the load cell.
This information is available at any time, and is displayed sequentially
when requested (except while on ‘SOS mode’). Access to this information
reduces maintenance time, improves time invested in failure location,
and helps for an easy resolution of the problem.
Additionally, each instrument can be assigned a custom label code of up
to 8 characters (see 4), that can be displayed at the front display or at the
messages sequence, making system identication of each instrument
an easy task.
To congure the ‘messages’ function, see section 13.8.
Table 1 | Available label codes
Letters Numbers
A
b o 1 _
c P 2 .
d q 3 º
E r 4 (blank)
F S 5
G t 6
h u 7
I V 8
J W 9
K X
L Y
M Z
Labeling examples: an application measures weight from ve different
load cells, at the four corners of a platform and the center. All signals are
converted to 4/20 mA for retransmission to PLC or SCADA. Each PCESCI-L can be congured the following label for easy identication :
• Label for instrument 1: cornEr1
• Label for instrument 2: cornEr2
• Label for instrument 3: cornEr3
• Label for instrument 4: cornEr4
• Label for instrument 5: cEntEr
n 0
Special
-
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PCE Instruments
7. Practical load cell information
7.1 Number and type of cells accepted
The instrument accepts up to 4 standard 350 Ohms load cells. The
instrument provides 5 Vdc excitation voltage. For load cells with different
impedance, calculate the current consumption for each cell, and the
total must not exceed the maximum current the instrument can provide
(see section 11).
In case of problems with the signal provided by the load cell, the
instrument provides information for troubleshooting purposes. Congure
the ‘messages’ function (see section 13.8) to access the actual values
for the input signal (expressed in mV), the excitation voltage measured
at the ‘sense’ terminals (expressed in Vdc) and the current provided to
the cell (expressed in mA). The operator can use these values to identify
the cause of the problem. See section 6 for more information on how to
access these values in real time.
7.2 Load cell and ‘sense’ wires
The instrument is designed to measure load cell signals. The instrument
provides 5 Vdc excitation voltage to power the load cell, and reads the
millivolt signal generated by the load cell. The instrument also reads the
actual excitation voltage connected to the load cell, and compensates
the read signal for changes at the excitation voltage.
The actual value of the excitation voltage is detected by using the
‘sense’ wires. Connect the ‘sense +’ and ‘sense -’ (terminals 5 and 2) to
the load cell, to provide the instrument with an accurate value of the
excitation voltage received by the cell. Deviations and errors from the
standard excitation value (5 Vdc) are automatically compensated by the
instrument, increasing the accuracy and reliability of the measure.
If you can not connect the ‘sense’ wires to the load cell, place a
shortcircuit between terminals ‘sense +’ and ‘Vexc +’ (terminals 5 and 4),
and between terminals ‘sense -’ and ‘Vexc -’ (terminals 2 and 1).
For applications with multiple load cells (2, 3 or 4 cells) connect the
‘sense ’ wires to the ‘electrical middle point’ of the power wires of all the
cells (see section 7.8).
7.3 Millivolt mode
The instrument can be congured to measure millivolts in differential
mode. Activating any millivolt measurement mode, disables de
excitation voltage and disables the ‘sense’ compensation for changes
at the excitation voltage. The instrument works as a pure differential
millivolt signal converter.
Table 3 | Millivolt mode connection
123 456PCE-SCI-L
terminals
mV - mV +
7.4 Load cell with external power
The instrument can be congured to read signals from load cells which
are externally powered up to 10 Vdc, and not use the power provided by
the instrument.
Congure the instrument to read in ‘load cell’ mode and set the excitation
voltage parameter to ‘off’. Connect the ‘sense’ wires to the excitation
voltage terminals of the load cell. With the ‘sense’ wires, the instrument
will compensate for variations of the power supply.
With this conguration, values indicated in mV’ units (see section 10.1),
are scaled to a theoretical power value of 5 Vdc, therefor values may not
be directly interpretable.
Table 4 | Load cell connection with external power
Table 2 | Typical load cell connection
123 456
signal - signal +
sense -
Vexc -
The ‘sense’ terminals must be always connected. If you do not
4
use the ‘sense’ wires, shortcircuit with ‘Vexc’ terminals
PCE-SCI-L
terminals
Vexc +
sense +
123 456
signal - signal +
PCE-SCI-L
terminals
Vexc +
sense -
sense +
Vexc -
7.5 Connecting the cell to the ground
Measuring with load cells requires an electrically clean installation.
When connecting the ground to the cell system, assure that the load
cell connection to ground is performed in such a way that the current to
ground does not ow through the cell.
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7. Practical information (cont.)
PCE Instruments | www.pce-instruments.com
7.6 Connections with a junction box
A ‘junction box’ is a connections box where several load cells can be
connected. The ‘junction box’ then offers a single set of output terminals,
that will be connected to the instrument.
The ‘junction box’ provides 4 or 6 terminals, like a normal load cell: two
terminals for millivolt signal, two terminals for excitation voltage, and
eventually two additional terminals for ‘sense’ wires. If ‘sense’ terminals
are not present, you can connect the ‘sense’ wires to the excitation
voltage terminals of the ‘junction box’ or directly to the ‘electrical middle
point’ of the power wires of the load cells. Last option is to short circuit
the ‘sense’ terminals to the excitation voltage terminals as indicated at
section 7.2.
If the ‘junction box’ provides an output signal that is the addition of
each of the millivolt load cell signals, congure the instrument for the
appropriate input signal range.
Example : four load cell signals of 2 mV/V, powered at 5 Vdc, each load cell
provides a maximum of 10 mV signal. The output of the ‘junction box‘ will
be 40 mV maximum, so select the 0/40 mV input signal range.
If the ‘junction box’ provides the mean value of the four load cell signals,
then the input signal range must be selected to 0/10 mV.
Table 5 | Connections with a junction box
7.8 Connections with 3 or 4 load cells
Using 3 load cells is the optimal way to distribute the weight on a plane,
although it is common to work with 4 load cells in applications with
tanks, hoppers and similar.
When working with multiple load cells, the optimal connection is the
one that makes the wires of the load cell converge in the same central
area, so that all the cells are at the same ‘electrical distance’ from the
instrument.
Use the same type load cell and connect the wires to the central area as
indicated below. Congure the instrument as indicated in this manual,
assuming that :
•
the nominal weight of the system is the addition of the nominal
weight of each cell (3 x 100 Kg = 300 Kg for 3 cells, or 4 x 100 Kg = 400 Kg
for 4 cells)
•
the ‘sense’ wires are carried to the central area together with the Vexc
wires, but are not propagated to each individual cell. If you do not want
to use the ‘sense’ wires, see section 7.2.
Table 6 | Direct connection to 3 load cells
PCE-SCI-L terminals
123 456
123 456
sense -
Vexc -
PCE-SCI-L
terminals
signal - Vexc +
sense +
signal +
Junction box
(connections box)
7.7 How to calculate the input signal range
The input signal range selected at the instrument must be able
to accept the whole range of signal that the load cell can provide.
This value is obtained by multiplying the sensitivity of the load cell
(expressed in mV/V) with the excitation voltage value, which is 5 Vdc
for this instrument.
• Load cell sensitivity = 2 mV/V
• Excitation voltage = 5 Vdc
• Maximum signal = 2 mV/V x 5 Vdc = 10 mV
• Select ‘Input signal range’ = 0/10 mV
• Code 011 for 4/20 mA output or code 110 for 0/10 Vdc output
Signal+
Sense+
Vexc+
Signal-
Sense-
Vexc-
Table 7 | Direct connection to 4 load cells
PCE-SCI-L terminals
123 456
Signal+
Sense+
Vexc+
Signal-
Sense-
Vexc-
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PCE Instruments
8. Predened conguration codes
Select the desired code for your application, and check the following
sections for more information:
• for information on how to activate a code, see section 13.1
• to customize the input and output signals, see section 13.4
The instrument accepts up to 4 standard 350 Ohms load cells. The
instrument provides 5 Vdc excitation voltage. Calculate the maximum
output signal generated by your load cell, and select the ‘Predened
conguration code’ accordingly (see Table 8).
To calculate the optimal input signal range for your load cell,
see section 7.7.
Table 8 | Predened conguration codes for load cells - Input / Output
Input signal
range
0/5 mVdc
0/10 mVdc 011 111
Type of signal Output 4/20 mA
Code
load cell
010 110
signal
Output 0/10 Vdc
Code
See section
...
0/15 mVdc 012 112
0/20 mVdc 013 113
0/25 mVdc 014 114
0/30 mVdc 015 115
0/40 mVdc 016 116
0/50 mVdc 017 117
0/60 mVdc 018 118
0/70 mVdc 019 119
10.1
0/80 mVdc 020 120
±5 mVdc 021 121
±10 mVdc 022 122
±20 mVdc 023 123
±30 mVdc 024 124
±40 mVdc 025 125
±50 mVdc 026 126
±60 mVdc 027 127
±70 mVdc 028 128
±80 mVdc 029 129
Reserved 030 to 049 130 to 149
The instrument can be congured to measure millivolt in differential
mode. Activating the millivolt mode disables de excitation voltage and
disables the ‘sense’ compensation for changes at the excitation voltage.
The instrument works as a pure differential millivolt signal converter.
Select the ‘Predened conguration code’ according to your maximum
millivolt signal (see Table 9).
Table 9 | Predened conguration codes for millivolt signals - Input / Output
Input signal
range
0/5 mVdc
0/10 mVdc 051 151
Type of signal Output 4/20 mA
Code
millivolt
050 150
signal
Output 0/10 Vdc
Code
See section
...
0/15 mVdc 052 152
0/20 mVdc 053 153
0/25 mVdc 054 154
0/30 mVdc 055 155
0/40 mVdc 056 156
0/50 mVdc 057 157
0/60 mVdc 058 158
0/70 mVdc 059 159
0/80 mVdc 060 160
10.2
±5 mVdc 061 161
±10 mVdc 062 162
±20 mVdc 063 163
±30 mVdc 064 164
±40 mVdc 065 165
±50 mVdc 066 166
±60 mVdc 067 167
±70 mVdc 068 168
±80 mVdc 069 169
Reserved 070 to 099 170 to 199
(End of list) ‘----’ (see notes below)
(Custom selection)
‘uSEr’ (see notes below)
6
Notes
• Code ‘uSEr’ indicates that a user custom conguration is active, and it does not
match any of the listed codes This code is non-selectable, for information only.
Example: select code ‘013’ for 0/20 mVdc=4/20 mA, the instrument reads code
‘013’. Later, congure the input to 0/17 mVdc=4/20 mA, this does not match a listed
code, and the instrument reads ‘uSEr’. Or change the output to 0/20 mVdc=1/5 Vdc,
this does not match a listed code, and the instrument reads ‘uSEr’.
• Code ‘----’ identies the end of the list, it follows code ‘199’ and the list
continues with code ‘010’. Select ‘----’ to exit the list without applying changes.
Page 7
9. Connections and dimensions (mm (inch))
PCE Instruments | www.pce-instruments.com
108 mm
(4.25’’)
Standard (35 mm) DIN
rail mount
A B C
1 2 3
~ +
~ -
106 mm
(4.17’’)
signal sense Vexc -
fuse
POWER (ABC)
18 to 265 Vac/dc isolated
OUTPUT SIGNAL (789)
see ‘Table 11’
INPUT SIGNAL (123 456)
see
‘Table 10’
22.5 mm
(0.89’’)
7 8 9
SIGNAL CONVERTER
4 5 6
common (0 Vdc or passive mA current out)
signal 4/20 mA (mA current in)
signal 0/10 Vdc (or active mA current out)
Fuse - This instrument does not
include internal protection fuse.
According to security regulation
EN 61010-1, add a protection fuse to
the power line to act as a disconnection
element, easily accessible to the operator
PCE-SCI series
and identied as a protection device. Use
time-lag fuse, with value :
• 250 mA for voltages > 50 Vac/dc
• 400 mA for voltages < 50 Vac/dc
signal +
sense +
Vexc +
Table 10 | INPUT signal connections
INPUT
signal
load cell Vexc - sense - signal - Vexc + sense + signal +
millivolts mV - mV +
1 2 3 4 5 6
Input terminals Section
...
10.1
10.2
Table 11 | OUTPUT signal connections
OUTPUT
signal
4/20 mA
active output
4/20 mA
passive output
(*external loop
power needed)
Output terminals Connections
7 8 9
mA-
(in)
*
mA+
(out)
mA-
(in)
mAmA+
mA+
(out)
789
mA+
mA-
789
common
0/10 Vdc
common
+Vdc
+Vdc
789
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PCE Instruments
10. Input signals
10.1 Load cell signals
MEASURING LOAD CELL SIGNALS
The instrument can be congured to measure load cell
Load cell
signals, with pre-congured ranges from 0/5 mV up to
0/80 mV. The instrument provides excitation voltage of
+5 Vdc to power the load cell, with a maximum of 70 mA
(this is 4 standard load cells of 350 Ohms). Bipolar ranges from ±5 mV
up to ±80 mV can also be congured.
‘SENSE’ FUNCTION
The instrument reads the actual excitation voltage received by the load
cell, and compensates the signal read for any variations of the excitation
voltage. The applied voltage is read through the ‘sense’ wires and the
‘sense’ wires must be connected to the load cell. If it is not possible to
connect the ‘sense’ wires to the load cell, apply a shortcircuit between
terminals ‘sense +’ and ‘Vexc +’ (terminals 5 and 4), and between terminals
‘sense -’ and ‘Vexc -’ (terminals 2 and 1). (see section 7.2).
PREDEFINED CONFIGURATION CODES
See ‘Table 13’ for a list of predened input-output conguration codes.
To activate a code see section 13.1.
CUSTOMIZED SIGNAL RANGES
To customize the input and / or output signal ranges, access the
‘Advanced scaling’ menu (see section 13.4).
MAXIMUM OVERSIGNAL AND PROTECTIONS
‘Maximum oversignal’ is the maximum signal accepted by the instrument.
Higher signal values may damage the instrument. Lower signal values
are non destructive but may be out of accuracy specications. Do not
connect active signals to the excitation voltage terminals.
OUTPUT SIGNAL
The output signal is congurable to 4/20 mA (active and passive) and
0/10 Vdc.
Table 13 | Input signal ranges for load cell signals
Input
range
0/5 mV
0/10 mV 011 111 <0.10 % ±12 Vdc 20 MOhm
0/15 mV 012 112 <0.10 % ±12 Vdc 20 MOhm
0/20 mV 013 113 <0.10 % ±12 Vdc 20 MOhm
0/25 mV 014 114 <0.10 % ±12 Vdc 20 MOhm
0/30 mV 015 115 <0.10 % ±12 Vdc 20 MOhm
0/40 mV 016 116 <0.10 % ±12 Vdc 20 MOhm
0/50 mV 017 117 <0.07 % ±12 Vdc 20 MOhm
0/60 mV 018 118 <0.07 % ±12 Vdc 20 MOhm
0/70 mV 019 119 <0.07 % ±12 Vdc 20 MOhm
0/80 mV 020 120 <0.07 % ±12 Vdc 20 MOhm
±5 mV 021 121 <0.15 % ±12 Vdc 20 MOhm
±10 mV 022 122 <0.10 % ±12 Vdc 20 MOhm
±20 mV 023 123 <0.10 % ±12 Vdc 20 MOhm
±30 mV 024 124 <0.10 % ±12 Vdc 20 MOhm
±40 mV 025 125 <0.10 % ±12 Vdc 20 MOhm
±50 mV 026 126 <0.07 % ±12 Vdc 20 MOhm
±60 mV 027 127 <0.07 % ±12 Vdc 20 MOhm
Code for
4/20 mA output
010 110 <0.15 % ±12 Vdc 20 MOhm
Code for
0/10 Vdc output
Accuracy
(% FS)
Max.
oversignal
Zin
Table 12 | Connection example for load cell signals
123
mV sense Vexc -
456
mV +
sense +
Vexc +
±70 mV 028 128 <0.07 % ±12 Vdc 20 MOhm
±80 mV
029 129 <0.07 % ±12 Vdc 20 MOhm
CORRECTED MILLIVOLT SIGNAL
Throughout this document, the ‘Input signal low’ (In.Lo), ‘Input signal high’ (In.hI) and ‘Tare’ (tArE) parameters and the ‘Input signal value’
(InP.S), are expressed in ‘corrected millivolt’ units, and are indicated with a ( ’ ) symbol. The millivolt values of these parameters may not be the same
as the millivolt values directly measured at the input signal terminals. The parameter values are corrected to a theoretical excitation voltage scale
of ‘5 Vdc’. The instrument reads the real value of the excitation voltage at the load cell, and compensates for any variations away from the ‘5 Vdc’
theoretical value.
For troubleshooting purposes, the ‘Measure’ function displays the real millivolt signal at terminals (see section 13.5). This value can be compared
with the value provided by a handheld millivolt meter connected at the input terminals.
8
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10. Input signals (cont.)
10.2 Millivolts signals
MEASURING MILLIVOLT SIGNALS
+
The instrument can be congured to measure millivolt
-
mV
ranges from ±5 mV up to ±80 mV can also be congured.
signals from any source, with pre-congured ranges from
0/5 mV up to 80 mV. See connections at ‘Table 14’. Bipolar
PCE Instruments | www.pce-instruments.com
Table 15 | Input signal ranges for millivolt signals
Input
range
0/5 mV
Code for
4/20 mA output
050 150 <0.10 % ±12 Vdc 10 MOhm
Code for
0/10 Vdc output
Accuracy
(% FS)
Max.
oversignal
Zin
PREDEFINED CONFIGURATION CODES
See ‘Table 15’ for a list of predened input-output conguration codes.
To activate a code see section 13.1.
CUSTOMIZED SIGNAL RANGES
To customize the input and / or output signal ranges, access the
‘Advanced scaling’ menu (see section 13.4).
MAXIMUM OVERSIGNAL AND PROTECTIONS
‘Maximum oversignal’ is the maximum signal accepted by the instrument.
Higher signal values may damage the instrument. Lower signal values
are non destructive but may be out of accuracy specications.
OUTPUT SIGNAL
The output signal is congurable to 4/20 mA (active and passive) and
0/10 Vdc.
0/10 mV 051 151 <0.07 % ±12 Vdc 10 MOhm
0/15 mV 052 152 <0.07 % ±12 Vdc 10 MOhm
0/20 mV 053 153 <0.07 % ±12 Vdc 10 MOhm
0/25 mV 054 154 <0.07 % ±12 Vdc 10 MOhm
0/30 mV 055 155 <0.07 % ±12 Vdc 10 MOhm
0/40 mV 056 156 <0.05 % ±12 Vdc 10 MOhm
0/50 mV 057 157 <0.05 % ±12 Vdc 10 MOhm
0/60 mV 058 158 <0.05 % ±12 Vdc 10 MOhm
0/70 mV 059 159 <0.05 % ±12 Vdc 10 MOhm
0/80 mV 060 160 <0.05 % ±12 Vdc 10 MOhm
±5 mV 061 161 <0.10 % ±12 Vdc 10 MOhm
±10 mV 062 162 <0.07 % ±12 Vdc 10 MOhm
±20 mV 063 163 <0.07 % ±12 Vdc 10 MOhm
±30 mV 064 164 <0.07 % ±12 Vdc 10 MOhm
±40 mV 065 165 <0.05 % ±12 Vdc 10 MOhm
Table 14 | Connection examples for millivolt signals
123
456
mV -
not connected
not connected
mV +
not connected
not connected
±50 mV 066 166 <0.05 % ±12 Vdc 10 MOhm
±60 mV 067 167 <0.05 % ±12 Vdc 10 MOhm
±70 mV 068 168 <0.05 % ±12 Vdc 10 MOhm
±80 mV
069 169 <0.05 % ±12 Vdc 10 MOhm
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PCE Instruments
11. Technical specications
INPUT SIGNAL RANGES FOR LOAD CELLS
signal ranges from 0/5 mV up to 0/80 mV (see section 10.1)
bipolar signal ranges from ±5 mV up to ±80 mV (see section 13.4)
excitation voltage +5 Vdc
excitation voltage variations automatic compensation (see section 7.2)
excitation current max. 70 mA
INPUT SIGNAL RANGES FOR MILLIVOLTS
signal ranges from 0/5 mV up to 0/80 mV (see section 10.2)
bipolar signal ranges from ±5 mV up to ±80 mV (see section 13.4)
excitation voltage no
input impedance 10 MOhm typical (with 1 MOhms during
150 milliseconds,
ACCURACY AT 25 ºC see for each type of signal at section 10
*
accuracy values are indicated for 4/20 mA
output. For 0/10 Vdc output, add +0.05 % to
indicated accuracy values
±
THERMAL DRIFT
STEP RESPONSE
Response time according to the congured parameter ‘power lter’ (see section
13.9). Typical response times to reach 99% of the output signal, in response to a
100% step at the input.
with ‘no lter’ <115 mSec. typ. (
‘50 Hz lter’ or ‘60 Hz lter’
with
with ‘50 and 60 Hz lter’ <300 mSec. typ. (
OUTPUT SIGNAL RANGES
active current output 4/20 mA active
passive current output 4/20 mA passive
voltage output 0/10 Vdc,
CONFIGURATION SYSTEM
key pad + display accessible at the front of the instrument
conguration ‘conguration menu’ and ‘predened codes’
scalable units scalable input ranges
POWER SUPPLY
voltage range 18 to 265 Vac/dc isolated
AC frequency 45 to 65 Hz
consumption <3.0 W
power wires 1 mm
overvoltage category 2
ISOLATION
input - output 3000 Veff (60 seconds)
power - input 3000 Veff (60 seconds)
power - output 3000 Veff (60 seconds)
150 ppm/ºC (F.S.) for ranges up to 5 mV
±
100 ppm/ºC (F.S.) for ranges up to 20 mV
±
75 ppm/ºC (F.S.) for ranges up to 80 mV
<150 mSec. typ. (
max. <22 mA, min. 0 mA
maximum load <400 Ohm
max. 30 Vdc on terminals
max. <11 Vdc, min. -0.05 Vdc (typ.)
minimum load > 10 KOhm
scalable output ranges
scalable process display
(20 to 240 Vac/dc ±10%)
2
to 2.5 mm2 (AWG17 to AWG14)
every 10 seconds approx.)
0 to 99%
)
0 to 99%
)
0 to 99%
)
ENVIRONMENTAL
IP protection IP30
impact protection IK06
operation temperature from 0 to +50 ºC
storage temperature from -20 to +70 ºC
‘warm-up’ time 15 minutes
humidity 0 to 95% non condensing
altitude up to 2000 meters
MECHANICAL
size 106 x 108 x 22.5 mm
mounting standard DIN rail (35 x 7.5 mm)
connections
housing material polyamide V0
weight <150 grams
packaging 120 x 115 x 30 mm, cardboard
plug-in screw terminal
(pitch 5.08 mm)
10
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PCE Instruments
12. How to operate the instrument
12.1 Conguration system
The instrument is fully congurable from the 3 push button keypad and
the 4 red digit led display at the front of the instrument (see Table 16).
Table 16 | CONFIGURATION SYSTEM
Key ‘SQ’ (<)
Key ‘UP’ (5)
Key ‘LE’ (3)
SIGNAL CONVERTER
PCE-SCI series
Display
12.2 ‘Normal mode’ of operation
AT POWER-UP
When the power supply is connected, the instrument applies the
following sequence :
• the ‘display’ shows the rmware code ‘b3.xx’.
• the ‘display’ shows the congured ‘units’ and ‘input range’ (for
example: ‘Lc’ and ‘15’ for 0/15 mV in load cell mode, or ‘MV’ and ‘b15’
for ±15 mV in millivolt mode).
• the instrument is now in ‘normal mode’ of operation and the ‘display’
shows the ‘information’ congured at section 13.6.
FROM ‘NORMAL MODE’ OF OPERATION
From ‘normal mode’ of operation, the operator can access the following
functions:
• key ‘SQ’ (<) gives access to the ‘conguration menu’ (see section 12.3).
• key ‘UP’ (5) gives access to the ‘force’ menu (see section 12.4).
• key ‘LE’ (5) activates the ‘messages’ function (see section 12.5).
‘ECO’ FUNCTION (‘DISPLAY’ POWERED OFF)
The ‘Eco’ function powers off the display under the following conditions:
• the instrument is in ‘normal mode’ of operation.
• and there is no interaction from the operator for 60 seconds.
The decimal point remains active (ashing), indicating that the
instrument is working correctly. This is a congurable function, enabled
by default. To congure the ‘Eco’ function, see section 13.9.
12.3 How to operate the ‘Conguration menu’
HOW TO ENTER THE ‘CONFIGURATION MENU’
With the instrument in ‘normal mode’ of operation (see section 12.2),
press the ‘SQ’ (<) key and maintain for 1 second. The horizontal leds
light from bottom to top. When the upper led lights, the instrument
enters into the ‘conguration menu’.
When entering the ‘conguration menu’, the rst menu entry ‘Function
code’ (codE) is displayed. See section 14 for a full view of the
‘conguration menu’.
If the ‘SQ’ (<) key is released before entering into the
‘conguration menu’, the horizontal leds light downwards from
top to bottom, and the instrument returns to ‘normal mode’ of
operation.
HOW TO OPERATE INSIDE THE ‘CONFIGURATION MENU’
Inside the ‘conguration menu’, use the front keypad to move through
menu entries, parameters, and select conguration values:
• Key ‘SQ’ (<) functions as the ‘ENTER’ key. It selects the menu entry
currently displayed. At numerical value entries, it validates the number
displayed.
• Key ‘UP’ (5) moves vertically through the different menu entries. At
numerical value entries, it modies the selected digit by increasing its
value to 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
• Key ‘LE’ (3) functions as the ‘ESCAPE’ key. It leaves the selected
menu entry, and eventually, will leave the ‘conguration menu’.
When leaving the ‘conguration menu’, the changed parameters are
activated. At numerical value entries, the ‘LE’ (3) key allows to select
the active digit. To modify a numeric value press the ‘UP’ (5) key to
increase the value ‘+1’. Press the ‘SQ’ (<) key to validate the value.
WHEN EXITING THE ‘CONFIGURATION MENU’
When exiting the ‘conguration menu’ without changes (either by
‘rollback’ activation or because there are no changes in the conguration),
the horizontal leds light down from top to bottom, and the instrument
returns to ‘normal mode’ of operation.
When exiting the ‘conguration menu’ with changes, the display leds light
a round shape while the new conguration is stored. When the round
shape is nished, a start-up is applied (see section 12.2). After start-up,
the new conguration is active and the instrument is in ‘normal mode’ of
operation.
‘ROLLBACK’ FUNCTION
If there is no interaction from the operator for 60 seconds, the instrument
exits the ‘conguration menu’ discarding changes, and returns to ‘normal
mode’ of operation.
Table 17 | ‘ECO’ DECIMAL POINT
12
Flashing
When the operator is inside the ‘conguration menu’, the output
signal will remain overranged at maximum signal. Additional
congurations are available at the ‘On SQ’ parameter (see
section 13.9).
When the operator exits the ‘conguration menu’, the output
signal is temporarily set to minimum value for a time
<5 seconds, while the instrument restarts.
Page 13
12. How to operate the instrument (cont.)
12.4 How to operate the ‘Force’ menu
PCE Instruments | www.pce-instruments.com
HOW TO ENTER THE ‘FORCE’ MENU
With the instrument in ‘normal mode’ of operation (see section 12.2), press
and hold the ‘UP’ (5) key for 1 second. The horizontal leds light from bottom
to top. When the upper led lights, the instrument enters into the ‘force’ menu.
If the ‘UP’ (5) key is released before entering into the ‘force’ menu, the
horizontal leds light downwards from top to bottom, and the instrument
returns to ‘normal mode’ of operation.
HOW TO OPERATE INSIDE THE ‘FORCE’ MENU
The available functions inside the ‘force’ menu can be congured (see
section 13.7). By default, ‘Force High’, ‘Force Low’, ‘Force Set’ and ‘Tare’ are
available. Inside the ‘force’ menu:
• press the ‘UP’ (5) key to move to the next function.
• press the ‘SQ’ (<) key to activate the selected function.
When the function is active, the display will remain ashing. Press the ‘SQ’
(<) key to deactivate the function (display stops ashing), or wait for the
rollback to activate.
Table 18 | Example of ‘Force’ menu with all functions set to ‘on’
‘Force Low’
‘Force high’
Force Set
Tare Tare value in mV
DESCRIPTION OF ‘TARE’ FUNCTION
The ‘tare’ function allows to view the actual value of the tare and manually
apply a tare. Press the ‘SQ’ (<) key to enter the ‘tare’ function, and access
the actual tare value expressed in millivolts’ (see section 10.1) with 2 decimal
points. Press again the ‘SQ’ (<) key to apply a new tare. The instrument
will show ‘ok’ while the new tare is applied, and will return back to indicate
the new tare value applied. Tare value can also be accessed and manually
modied at the ‘conguration menu’ (see section 13.4).
HOW TO EXIT ‘FORCE’ MENU
To exit the ‘force’ menu, press the ‘LE’ (3) key, or press the key ‘UP’ (5) key
until the parameter ‘----’ appears, and select by pressing the ‘SQ’ (<) key, or
wait without pressing any key until the automatic ‘rollback’ activates.
When exiting the ‘force’ menu, the horizontal leds light down from top to
bottom, and the instrument returns to ‘normal mode’ of operation.
‘ROLLBACK’ FUNCTION
If there is no interaction from the operator for 60 seconds, the instrument
exits the ‘force’ menu and returns to ‘normal mode’ of operation.
12.5 How to activate the ‘Messages’ function
HOW TO ACTIVATE ‘MESSAGES’ FUNCTION
With the instrument in ‘normal mode’ of operation (see section
12.2), press the ‘LE’ (3) key to activate the ‘messages’ function. The
‘messages’ function displays information about the instrument status.
The information available is congurable (see section 13.8).
The ‘messages’ function ends when all the information has been
displayed or front keys ‘UP’ (5) or ‘SQ’ (<) are pressed. The ‘display’
returns to ‘normal mode’ of operation.
Exit
See section 13.7 for a list and a description of available functions.
DESCRIPTION OF ‘FORCE’ FUNCTIONS
The ‘force’ functions allow to manually force the output signal to the low
and high levels of the output signal selected. These functions allow to
easily validate the correct function of remote elements connected to the
instrument output, such as PLC, HMI’s, SCADAs, etc.
The ‘force low’ function sets the output signal to the minimum value of the
selected range (4 mA or 0 Vdc or the value congured at the ‘output_low’
parameter).
The ‘force high’ function sets the output signal to the maximum value of the
selected range (20 mA or 10 Vdc or the value congured at the ‘output_high’
parameter).
The ‘force set’ function sets the output signal to a value between 0 and 100%
of the maximum selected range (4 to 20 mA or 0 to 10 Vdc or the range
congured at the ‘output_low’ and ‘output_high’ parameters). When entering
the ‘force set’ function, the display reads ‘50’ (the output is forced to 50% of
the congured range). Use keys ‘UP’ (5) and ‘LE’ (3) to move up to 100% or
down to 0% of the congured range.
12.6 Fast and advanced congurations
FAST CONFIGURATION
The fastest way to congure the instrument is to activate one of the
predened conguration codes (see section 8).
Access the ‘conguration menu’ and enter the ‘Function code’ (codE)
menu entry. The code displayed is the current active input - output range.
Select the new code and validate. Selecting a code automatically exits
the ‘conguration menu’ and activates the new conguration.
*
There are different codes for 4/20 mA and 0/10 Vdc output
signals.
To customize the input and output signals, see the ‘Advanced scaling’
section of the ‘conguration menu’ (see section 13.4).
ADVANCED CONFIGURATION
Additional conguration parameters are available at the ‘conguration
menu’. The operator can customize the input and output signal ranges,
the messages seen on display, the functions available at the ‘force’ menu,
the messages associated to the ‘LE’ (3) key, activate lters, password
function, etc.
See section 13 for a detailed explanation on the ‘conguration menu’.
13
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PCE Instruments
13. Conguration menu
13.1 Function codes
The fastest way to congure the instrument, is to select a predened
conguration code (see section 8). At the ‘Conguration code’ (codE)
parameter use keys ‘UP’ (5) and ‘LE’ (3) to move up and down
through the list of codes. Locate the desired code, and press ‘SQ’ (<).
The instrument shows the ‘codE’ parameter. Press ‘LE’ (3) to exit the
‘conguration menu’. The instrument stores the new conguration,
applies a ‘power-up’ routine and returns to the ‘normal mode’ of operation
(see section 12.2).
Selecting a ‘reserved’ code or ‘----’ returns to the previous menu without
changes.
When entering the ‘Function code’ (codE) parameter, the active
‘conguration code’ is displayed. If the actual conguration does not
match any of the conguration codes, code ‘uSEr’ is displayed.
There are different codes for 4/20 mA output (codes from 010 to 099)
and 0/10 Vdc output (codes from 110 to 199) (see section 8).
Custom input and output signal ranges can be congured at the
‘Advanced scaling’ section of the ‘conguration menu’ (see section 13.4).
13.2 Initial conguration
At the ‘Input conguration’ (InP) menu entry, congure the reading
mode and the input signal range.
Conguration code
Input conf.
Mode
Signal range
Enter the code (see Table 8)
Load cell mode
Millivolt mode
0/5 mV
0/10 mV
0/15 mV
0/20 mV
0/25 mV
0/30 mV
0/40 mV
0/50 mV
If you have already selected a conguration code (see section
13.1), the input signal has been already selected and there is
no need to manually select the ‘Mode’ (ModE) or ‘Signal range’
(rAnG) parameters again.
At the ‘Mode’ (ModE) parameter select ‘cELL’ for load cell measurement,
or select ‘MV’ for millivolt measurement. See section 7.2 and 7.3 for an
explanation of the differences between both modes.
At the ‘Signal range’ (rAnG) parameter select the input signal range.
Input signal ranges can also be congured by selecting a pre-dened
conguration code (see section 13.1).
For an example on how to calculate the appropriate input signal range
for a given load cell, see section 7.7.
To customize to an intermediate range (for example 0/7.5 mV) see
section 13.4. To manually select the output signal see section 13.3.
At the ‘Excitation voltage’ (V.EXc) parameter select ‘oFF’ to disable the
excitation voltage. Excitation voltage is set to ‘on’ when selecting the
‘cELL’ mode, and set to ‘oFF’ when selecting the ‘MV’ mode at the ‘Mode’
(ModE) parameter.
0/60 mV
0/70 mV
0/80 mV
±5 mV
±10 mV
±20 mV
±30 mV
±40 mV
±50 mV
±60 mV
±70 mV
±80 mV
Excitation voltage
Excitation voltage
13.3 Output range
At the ‘Output range’ (out) menu entry, select the output signal range to
4/20 mA (value ‘420’) or to 0/10 Vdc (value ‘010’).
The output signal range selected can be later customized to operate in a
reduced range of signal (see section 13.4).
14
Output range
Page 15
13. Conguration menu (cont.)
PCE Instruments | www.pce-instruments.com
13.4 Advanced scaling
At the ‘Advanced scaling’ (Ad.Sc) menu, customize the actual value for
the tare, the input and output signal ranges and, if used, the process
value. When selecting a predened conguration code, the parameters
are congured according to the code selected. The parameters are
accessible for manual conguration:
• at ‘Tare ’ (tArE) view the actual value of the tare parameter, expressed
in ‘x.xx’ mV’ (see section 10.1). To reset the tare value manually set this
parameter to ‘0.00’. Selecting a new ‘conguration code’ (see section
13.1) or a new ‘signal range’ (see section 13.2) also restes the ‘tare’
value to zero.
• at the ‘Input low signal’ (In.Lo) parameter congure the low input
signal value. This value is expressed in ‘x.xx’ mV’ (see section 10.1).
The parameter value is not affected by changes at the tare value.
• at the ‘Input high signal’ (In.hI) parameter congure the high input
signal value. This value is expressed in ‘x.xx’ mV’ (see section 10.1).
The parameter value is not affected by changes at the tare value.
• at the ‘Output low signal’ (ou.Lo) parameter congure the low output
signal value. This value is expressed in ‘x.xx’ mA or in ‘x.xx’ Vdc.
• at the ‘Output high signal’ (ou.hI) parameter congure the high
output signal value. This value is expressed in ‘x.xx’ mA or in ‘x.xx’ Vdc.
These four parameters dene the relation between the input and the
output signal (see Table 19) and can be modied independently, to match
the specic input-output relation for your application (see Table 20).
Advanced scaling
Tare value (in mV’)
Input signal low (in mV’)
Input signal high (in mV’)
Output signal low
Output signal high
Process low
Process high
Process decimal point
Table 19 | EXAMPLE FOR CODE ‘011’ (0/10 mV=4/20 mA)
Output
20 mA
4 mA
0 mV’ 10 mV’
Selecting the predened code ‘011’ congures a range of 0/10 mV’=4/20 mA, and
the values congured are as indicated below:
input_low = 0.00 mV’ output_low = 4.00 mA
input_high = 10.00 mV’ output_high = 20.00 mA
Input
Additionally, a process value can be scaled using the last three
parameters of the ‘Advanced Scaling’ (Ad.Sc) menu. The actual process
value can be accessed through the ‘display information’ function (see
section 13.6) or the ‘messages’ function (see section 13.8).
• at the ‘Process low’ (Pr.Lo) parameter, congure the process value
associated to the low input signal value.
• at the ‘Process high’ (Pr.hI) parameter, congure the process value
associated to the high input signal value.
• at the ‘Process decimal point’ (Pr.dP) parameter, congure the
decimal point position for the process value.
Table 20 | EXAMPLE FOR CUSTOM RANGE (-8/+8 mV=1/9 Vdc)
Output
9 Vdc
1 Vdc
Input-8 mV’ +8 mV’
To congure -8/+8 mV’=1/9 Vdc, select code 122 (-10/+10 mV’=0/10 Vdc) and
then congure the parameters below:
input_low = -8.00 mV’ output_low = 1.00 Vdc
input_high = 8.00 mV’ output_high = 9.00 Vdc
15
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PCE Instruments
13. Conguration menu (cont.)
13.5 Field correction
At the ‘Field correction’ (F.cor) menu, there is access to the ‘eld
correction’ functions. The ‘eld correction’ functions allow to modify
the ‘input signal low’ and ‘input signal high’ parameters of the ‘Advanced
scaling’ menu (see section 13.4), based on the actual input signal
measured at the input. Functions used to correct and ne tune the
slope of the load cell, by loading low and high weights and applying the
correction low and high. Tares can are applied after the correction.
• select the ‘Field correction low’ (Fc.Lo) function to set the actual
input signal value at the ‘input signal low’ parameter of the ‘Advanced
scaling’ menu. While measuring the value, the message ‘ok’ remains
ashing for 5 seconds. When the measure is completed, the instrument
returns to the ‘Field correction low’ (Fc.Lo) parameter.
• select the ‘Field correction high’ (Fc.hI) function to set the actual
input signal value at the ‘input signal high’ parameter of the ‘Advanced
scaling’ menu. While measuring the value, the message ‘ok’ remains
ashing for 5 seconds. When the measure is completed, the instrument
returns to the ‘Field correction high’ (Fc.hI) parameter.
The ‘tare’ value is reset to ‘0’ when a ‘Field correction low’
(Fc.Lo) or ‘Field correction high’ (Fc.hI) is applied.
13.6 Display information
At the ‘Display information’ (dISP) menu select one parameter to read
on display when the instrument is in ‘normal mode’ of operation. If you
need access to more than one information, see the ‘messages’ function
(see section 13.8) associated to front key ‘LE’ (3).
• select ‘Measure’ (MEAS) to read the value of the actual millivolts at
signal terminals (for example: ‘MEAS mV 7.82’). Value is expressed in
millivolts (see section 10.1).
• select ‘Tare’ (tArE) to read the actual value of the ‘tare’ parameter.
(for example : ‘tArE mV 1.27’) This value is expressed in corrected
millivolts (mV’) (see section 10.1).
• select ‘Input signal value’ (InP.S) to read the input signal value and
the measurement units (for example: ‘Inp mV 8.52’). This value is
expressed in millivolts (mV’) (see section 10.1).
Field
correction
Display
information
Field correction
low
Field correction
low
‘ok’ message ashes while
the ‘eld correction’ function
is being applied and when
nished, the instrument
returns to previous menu
entry.
Millivolts at signal terminals (in mV)
Tare value (in mV’)
Input signal value (in mV’)
Output signal value
Label
Process value
Signal percentage
Excitation voltage (in Vdc)
Excitation current (in mA)
• select ‘Output signal value’ (out.S) to read the output signal value
and the measurement units (for example : ‘Out mA 12.40’).
• select ‘Label’ (LAbL) to read the value congured at the ‘label’ and
‘label2’ parameters (see section 13.9).
• select ‘Process value’ (Proc) to read the process value as scaled at
the process parameters (see section 13.4) (for example: ‘Proc 150.0’).
• select ‘Percentage’ (Prct) to read the percentage of input signal,
where ‘0’ is the value assigned to the ‘input signal low’ parameter, and
‘100’ is the value assigned to the ‘input signal high’ parameter (see
section 13.4) (for example: ‘Prct 23.5’).
• select ‘Excitation voltage’ (EX.V) to read the value of the excitation
voltage received by the load cell. This value is read from the ‘sense’
terminals (see section 7.2) (for example : ‘ExV 4.97’).
• select ‘Excitation current’ (EX.MA) to read the value of the current
provided through the excitation voltage terminals (for example: ‘ExMA 14.3’).
16
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13. Conguration menu (cont.)
13.7 Key ‘UP’ (‘force’ menu)
The key ‘UP’ (5) at the front of the instrument gives access to a
congurable list of functions (see section 12.4).
At the ‘Key UP (‘force’ menu)’ (K.uP) menu select which functions will
be available when pressing the front key ‘UP’ (5). Select ‘on’ to activate
the desired functions.
• congure ‘Force Low’ (F.Lo) to ‘on’ to activate the ‘Force low’ function
menu entry.
• congure ‘Force High’ (F.hI) to ‘on’ to activate the ‘Force high’ function
menu entry.
• congure ‘Force Set’ (F.SEt) to ‘on’ to activate the ‘Force set’ function
menu entry.
• congure ‘Ta re’ (tArE) to ‘on’ to activate the ‘Tare’ function menu
entry.
The functions congured to ‘on’ are available at the ‘force’ menu. See
section 12.4 for a description on each function and how to operate them.
Key ‘UP’
(‘force’ menu)
PCE Instruments | www.pce-instruments.com
Force low
Force high
Force set
Tare
13.8 Key ‘LE’ (‘messages’ function)
The key ‘LE’ (3) at the front of the instrument gives access to a
congurable set of information messages.
At the ‘Key LE (messages function)’ (K.LE) menu, select the informations
to be displayed when the front key ‘LE’ (3) is pressed (see section 12.5).
Select ‘on’ to activate each information.
• congure ‘mV at terminals’ (MEAS) to ‘on’ to see the value in
millivolts at terminals (for example : ‘MEAS mV 13.82’).
• congure ‘Tare value’ (tArE) to ‘on’ to see the actual value of the ‘tare’
parameter. (for example : ‘tArE mV 1.27’) This value is expressed in
corrected millivolts (mV’) (see section 10.1).
• congure ‘Input signal value’ (InP.S) to ‘on’ to see the input signal
value and the measurement units (for example: ‘Inp mV 8.52’). This
value is expressed in millivolts (mV’) (see section 10.1).
• congure ‘Output signal value’ (out.S) to ‘on’ to see the output signal
value and the measurement units (for example : ‘Out mA 12.40’).
• congure ‘Label’ (LAbL) to ‘on’ to see the value congured at the
‘label’ and ‘label2’ parameters (see section 13.9).
• congure ‘Process value’ (Proc) to ‘on’ to see the process value as
scaled at the process parameters (see section 13.4) (for example:
‘Proc 150.0’).
• congure ‘Percentage’ (Prct) to ‘on’ to see the percentage of
input signal, where ‘0’ is the value assigned to the ‘input signal low’
parameter, and ‘100’ is the value assigned to the ‘input signal high’
parameter (see section 13.4) (for example: ‘Prct 23.5’).
• congure ‘Excitation voltage’ (EX.V) to ‘on’ to see the value of the
excitation voltage received by the load cell. This value is read from the
‘sense’ terminals (see section 7.2) (for example : ‘ExV 4.97’).
• congure ‘Excitation current’ (EX.MA) to ‘on’ the value of the current
provided through the excitation voltage terminals (for example: ‘ExMA
14.3’).
When more than one parameter is set to ‘on’, values will be displayed
sequentially, in the same order as they are listed in the menu, with
a middle dash ‘-’ between them. When all information has been
displayed, the instrument returns to ‘normal mode’ of operation.
Key ‘LE’
(messages function)
mV at terminals
Tare value (in mV’)
Input signal value
(in mV’)
Output signal value
Label
Process value
Percentage
Excitation voltage
Excitation current
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PCE Instruments
13. Conguration menu (cont.)
13.9 ‘Tools’ menu
The ‘Tools’ (tool) menu groups several functions.
• at the ‘Eco mode’ (Eco) parameter, dene the time to wait before the
display is powered off (while in ‘normal mode’ of operation). Default
value is 60 seconds. Congure ‘0’ to disable the function and maintain
the display always on.
• at the ‘SOS mode’ (SoS) parameter select ‘on’ to activate the output
signal to a predened value. Select the value from 0 to 100 % of the
active output range (4/20 mA or 0/10 Vdc). To deactivate the ‘SOS
mode’ select ‘oFF’. See section 5 for more information on the ‘SOS
mode’.
• at the ‘Label’ (LAbL) parameter, dene an alphanumerical value to
be displayed on the display, when the instrument is in ‘normal mode’
of operation, or at the ‘messages’ function when the key ‘LE’ (3) is
pressed. The label can be used to identify the instrument with its
own internal factory code. If more than four characters are needed,
congure the ‘Label 2’ (LbL.2) parameter. The total label value is
the characters at ‘label’ followed by the characters at ‘label2’. For
additional information and a list of available characters, see section 6.
• at the ‘On error’ (on.Er) parameter, congure the behavior of the
output signal, in case of error at the input signal (see section 16).
• select ‘Output to high’ (to.hI) to force the output signal to overrange
to maximum value
• select ‘Output to low’ (to.Lo) to force the output signal to
underrange to minimum value
• select ‘Standard output’ (Stdr) to overrange output signal to
maximum value in case of input signal overrange, and to underrange
output signal to minimum value in case of input signal underrange.
• at the ‘On ‘SQ’’ (on.Sq) parameter, congure the behavior of the
output signal when the operator is inside ‘conguration menu’ (see
section 12.3).
• select ‘Output to high’ (to.hI) to force the output signal to overrange
to maximum value (21.5 mA, 10.5 Vdc)
• select ‘Output to low’ (to.Lo) to force the output signal to
underrange to minimum value (0 mA, 0 Vdc)
• select ‘Hold output’ (hoLd) to hold the output signal while the
operator remains inside ‘conguration menu’.
• at the ‘Power lter’ (P.FLt) parameter, select a lter for specic power
frequency rejection. The lter selection has an effect on the response
times (see section 11).
• select ‘No lter’ (nonE) to disable frequency rejection lters. This
enables the fastest response time.
• select ‘50 Hz lter’ (50.hZ) to enable rejection to 50 Hz frequency.
• select ‘60 Hz lter’ (60.hZ) to enable rejection to 60 Hz frequency.
• select ‘50 and 60 Hz lter’ (both) to enable rejection to both 50 Hz
and 60 Hz frequencies. This is the slowest response time.
• at the ‘Average lter’ (AVr) parameter, congure the recursive lter
to be applied to measured input signal. The lter can be used to reduce
oscillations on noisy signals. Congure the lter strength between
‘0’ and ‘100’. The lter is stronger with higher values. Increasing the
strength of the lter slows the response speed of the instrument.
Value ‘0’ disables the lter.
Tools
‘Eco’ mode
SOS mode
Label
Label 2
On error
On ‘SQ’
Power lter
Average lter
5 to 255 seconds (0 disabled) (60 sec. default)
% of output
Alphanumerical
Alphanumerical
Output to high
Output to low
Standard output
Output to high
Output to low
Hold output
No lter
50 Hz lter
60 Hz lter
50 and 60 Hz lter
0 to 100
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13. Conguration menu (cont.)
• at the ‘Dead band’ (d.bnd) parameter set a value between ‘0.0’ %
and ‘100.0’ %. This is a percentage of the ‘input signal high’ parameter
congured at the ‘Advanced scaling’ section. Input signals below this
value, are treated as a ‘0’.
example : instrument congured with code ‘011’ (0/10 mVdc = 4/20 mA)
and ‘input signal high’ parameter modied to 8 mVdc for an effective
input - output relation of ‘0/8 mVdc = 4/20 mA’. Congure the ‘Dead band’
parameter to ‘1.0’ to set a dead band value of 0.08 mVdc. All signals below
0.08 mVdc will be treated as 0 mVdc, and the output will be 4 mA.
• the ‘Version’ (VEr) parameter informs about the rmware version
running in the instrument.
• at the ‘Password’ (PASS) parameter dene a 4 digit code to
block access to the ‘conguration menu’. Activate the password to
prevent access to the instrument conguration by non authorized
personnel. To activate the ‘Password’ function select ‘on’, enter the
code and validate. The password will be requested when accessing
the ‘conguration menu’. The password does not block access to the
‘force’ menu. To deactivate the password, set the parameter to ‘oFF’.
• at the ‘Factory reset’ (FAct) parameter select ‘yes’ to activate the
default factory conguration (see section 15 for a list of factory
default parameters).
PCE Instruments | www.pce-instruments.com
‘Dead band’
Version
Password
Factory reset
0.0 to 100.0%
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PCE Instruments
14. Full conguration menu
Press ‘SQ’ (<) for 1 second to access the ‘conguration menu’. For
a description on how to operate inside the menus see section 12.
For a full vision of the ‘conguration menu’ structure see section 13.
Enter the function code (see section 8)
Function code
Output range
Tare value (in mV’)
Input conf.
Mode
Signal range
Load cell mode
Millivolt mode
0/5 mV
0/10 mV
0/15 mV
0/20 mV
0/25 mV
0/30 mV
0/40 mV
0/50 mV
0/60 mV
0/70 mV
0/80 mV
±5 mV
Advanced scaling
Field correction
Field correction
low
Field correction
low
Input signal low (in mV’)
Input signal high (in mV’)
Output signal low
Output signal high
Process low
Process high
Process decimal point
‘ok’ message ashes while
the ‘eld correction’ function
is being applied and when
nished, the instrument
returns to previous menu
entry.
Excitation voltage
±10 mV
±20 mV
±30 mV
±40 mV
±50 mV
±60 mV
±70 mV
±80 mV
Excitation voltage
Display
information
Millivolts at signal terminals (in mV)
Tare value (in mV’)
Input signal value (in mV’)
Output signal value
Label
Process value
Signal percentage
Excitation voltage
Excitation current
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14. Full conguration menu (cont.)
PCE Instruments | www.pce-instruments.com
Key ‘UP’
(‘force’ menu)
Key ‘LE’
(messages function)
Force low
Force high
Force set
Tare
mV at terminals
Tare value (in mV’)
Input signal value
(in mV’)
Output signal value
Tools ‘Eco’ mode
SOS mode
Label
Label 2
On error
On ‘SQ’
5 to 255 seconds (0 disabled) (60 sec. default)
% of output
Alphanumerical
Alphanumerical
Output to high
Output to low
Output standard
Output to high
Output to low
Hold output
Label
Process value
Percentage
Excitation voltage
Excitation current
Power lter
Average lter
‘Dead band’
Version
Password
No lter
Filter for 50 Hz
Filter for 60 Hz
Filter for 50 Hz and 60 Hz
0 to 100
0.0 to 100.0%
Factory reset
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PCE Instruments
15. Factory default parameters
16. Error codes
Function code (codE) 11 [c.011]
Input conguration (InP)
Mode (ModE) load cell (cELL)
Signal range (rAnG) 10.00 mV
Excitation voltage (V.EXc) on
Output range (out) 4/20 mA
Advanced scaling (Ad.Sc)
Tare (tArE) 0.00 [mV’]
Input signal low (In.Lo) 0.00 [mV’]
Input signal high (In.hI) 10.00 [mV’]
Output signal low (ou.Lo) 4.00 [mA]
Output signal high (ou.hI) 20.00 [mA]
Process low (Pr.Lo) 0
Process high (Pr.hI) 1000
Process decimal point (Pr.dP) 8888 (no decimal point)
Display information (dISP) mV at signal terminals (MEAS)
Key ‘UP’ (‘force’ menu) (K.uP)
Force low (F.Lo) on
Force high (F.hI) on
Force set (FSEt) on
Tare (tArE) on
Key ‘LE’ (‘messages’ function) (K.LE)
Measure (MEAS) off
Tare value (tArE) off
Input signal value (InP.S) off
Output signal value (out.S) on
Label (LAbL) off
Process value (Proc) off
Percentage (Prct) off
Excitation voltage (EX.V) off
Excitation current (EX.MA) off
Tools (tooL)
‘Eco’ mode (Eco) 60 [seconds]
SOS mode (SoS) off
Label (LAbL) LAbL
Label 2 (LbL.2) ---- (disabled)
On error (on.Er) to.hI (output to maximum value)
On ‘SQ’ (on.Sq) to.hI (output to maximum value)
Power lter (P.FLt) both (50 and 60 Hz lter)
Average lter (AVr) 0 (disabled)
Dead band (d.bnd) 0.0 (disabled)
Password (PASS) off (disabled)
RESET TO DEFAULT FACTORY PARAMETERS
To recover the instrument to default factory parameters, enter into
‘conguration menu’ and go to ‘Tools’ / ‘Factory reset’ and select ‘yes’
• access the ‘conguration menu’ (press key ‘SQ’ (<) for 1 second)
• press key ‘UP’ (5) to locate ‘tools’ and press ‘SQ’ (<)
• parameter ‘Eco mode’ appears on display
• press key ‘UP’ (5) to locate ‘Factory reset’ and press ‘SQ’ (<)
• value ‘no’ appears on display
• press key ‘UP’ (5) and ‘Yes’ appears on display
• press key ‘SQ’ (<) to apply the factory reset
• the leds light a round shape while the new conguration is applied
• the start up message appears (‘Lc 10’)
• the actual signal input value is displayed
• the instrument is in ‘normal mode’ of operation
In case of error, the error code is shown ashing on the digits. The error
code is not visible inside ‘conguration mode’ or inside the ‘force’ menu.
The error code remains active on display until the problem that caused
the error is solved. In case of multiple error codes, solve the rst problem
to see the next active error code.
In case of error, the output can be congured to overrange or underrange.
See the ‘On error’ (on.Er) parameter at section 13.9.
Table 21 | Error codes
Error Description
‘Er.01’ Password error. The password code entered is not correct.
‘Er.02’
‘Er.03’
‘Er.04’
‘Er.05’
‘Er.08’
‘Er.09’
‘Er.10’
‘Er.15’
‘Er.17’
Input hardware overrange. The input signal is higher than the
maximum signal that can be measured.
Input hardware underrange. The input signal is lower than the
minimum signal that can be measured.
Output hardware overrange. The output signal should be higher
than the maximum output signal that can be generated.
Output hardware underrange. The output signal should be lower
than the minimum output signal that can be generated.
Scaled input slope not valid. The values for ‘Input signal low’ (In.
Lo) and ‘Input signal high’ (In.hI) can not be the same. Enter a
different value to validate the parameter
Scaled output slope not valid. The values for ‘Output signal low’
(ou.Lo) and ‘Output signal high’ (ou.hI) can not be the same. Enter
a different value to validate the parameter
Scaled process display slope not valid. The values for ‘Process
low’ (Pr.Lo) and ‘Process high’ (Pr.hI) can not be the same. Enter
a different value to validate the parameter
Error at ‘sense’ wires. Signal detected at ‘sense’ wires is below
3.5 Vdc. Correct value should be around 5 Vdc. Short circuit,
broken cell, ...
Overload at the excitation current. The current provided by the
excitation terminals is higher than 70 mA. Short circuit, broken
cell, too many cells, ...
(see section 13.4).
(see section 13.4).
(see section 13.4).
Messages do not affect the output signal, and do not trigger the ‘On
error’ (on.Er) function.
Table 22 | Messages
Message Description
‘d.oVr’
‘d.udr’
‘-nA-’
Display overrange. The display value should be higher than the
maximum value that can be displayed.
Display underrange. The display value should be lower than the
minimum value that can be displayed.
Function not available. For the actual conguration, the function is
not available.
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PCE Instruments | www.pce-instruments.com
17. Precautions on installation
Check the documentation when you nd this symbol, to know
the nature of a potential danger and actions to prevent it.
Risk of electrical shock. Instrument terminals can be
connected to dangerous voltage.
Instrument protected with double isolation. No earth
connection required.
Instrument conforms to CE rules and regulations.
This instrument has been designed and veried conforming to the
61010-1 CE Security Regulation, for industrial applications. Installation
of this instrument must be performed by qualied personnel only. This
manual contains the appropriate information for the installation. Using
the instrument in ways not specied by the manufacturer may lead to a
reduction of the specied protection level. Disconnect the instrument
from all external circuits before starting any maintenance and / or
installation action.
The instrument does not have a general switch and will start operation
as soon as power is connected. The instrument does not have protection
fuse, the fuse must be added during installation.
The instrument is designed to be DIN rail mounted, inside a closed
cabinet, protected from direct impacts. An appropriate ventilation of the
instrument must be assured. Do not expose the instrument to excess of
humidity. Maintain clean by using a humid rag and do NOT use abrasive
products such as alcohols, solvents, etc. General recommendations for
electrical installations apply, and for proper functionality we recommend
: if possible, install the instrument far from electrical noise or magnetic
eld generators such as power relays, electrical motors, speed variators,
... If possible, do not install along the same conduits power cables
(power, motor controllers, electrovalves, ...) together with signal and/or
control cables. The use of shielded cables is recommended to prevent
the coupling of environmental electromagnetic noise, connected to earth
only one cable end side. Before proceeding to the power connection,
verify that the voltage level available matches the power levels indicated
in the label on the instrument. In case of re, disconnect the instrument
from the power line, re alarm according to local rules, disconnect the air
conditioning, attack re with carbonic snow, never with water.
Conformity with security regulations EN-61010-1 requires a
closed front cover. There is no need to open the front cover
under normal usage or conguration. The output terminal
prevents the front cover from opening. An open front cover may expose
areas with dangerous voltages. Remove connections with dangerous
voltages before opening. Only to be performed by qualied operators.
19. CE declaration of conformity
Manufacturer PCE INSTRUMENTS
Products PCE-SCI-L
The manufacturer declares that the instruments indicated comply with the
directives and rules indicated below.
Electromagnetic compatibility directive 2014/30/EU
Low voltage directive 2014/35/EU
ROHS directive 2015/863/EU
WEEE directive 2012/19/EU
Security rules EN-61010-1
Instrument Fixed, Permanently connected
Pollution degree 1 and 2 (without condensation)
Isolation Double
Overvoltage category 2
Electromagnetic compatibility rules EN-61326-1
EM environment
CISPR 11 Instrument Class A & Class B Group 1
Industrial
According to directive 2012/19/EU, electronic equipment
must be recycled in a selective and controlled way at the
end of its useful life.
18. Warranty
This instrument is warranted against all manufacturing defects for a
period of 36 months, as requested by the European legislation. This
warranty does not apply in case of misuse or accident, and the scope
of the warranty is limited to repair of the instrument, not being the
manufacturer responsible for additional damages or additional costs.
Within the warranty period and after examination by the manufacturer,
the unit will be repaired or substituted when found to be defective.
23
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GERMANY
PCE Deutschland GmbH
Im Langel 26
D-59872 Meschede
Deutschland
Tel.: +49 (0) 2903 976 99 0
Fax: +49 (0) 2903 976 99 29
info@pce-instruments.com
www.pce-instruments.com/deutsch
FRANCE
PCE Instruments France EURL
23, rue de Strasbourg
67250 Soultz-Sous-Forets
France
Téléphone: +33 (0) 972 3537 17
Numéro de fax: +33 (0) 972 3537 18
info@pce-france.fr
www.pce-instruments.com/french
SPAIN
PCE Ibérica S.L.
Calle Mula, 8
02500 Tobarra (Albacete)
España
Tel. : +34 967 543 548
Fax: +34 967 543 542
info@pce-iberica.es
www.pce-instruments.com/espanol
NETHERLANDS
PCE Brookhuis B.V. Institutenweg 15
7521 PH Enschede
Nederland
Telefoon: +31 (0)53 737 01 92
Fax: +31 53 430 36 46
info@pcebenelux.nl
www.pce-instruments.com/dutch
USA
PCE Americas Inc.
1201 Jupiter Park Drive, suite 8
Jupiter / Palm Beach
33458 FL
USA
Tel: +1 (561) 320-9162
Fax: +1 (561) 320-9176
info@pce-americas.com
www.pce-instruments.com/us
UNITED KINGDOM
PCE Instruments UK Ltd
Trafford House
Chester Rd, Old Trafford
Manchester M32 0RS
United Kingdom
Tel: +44 (0) 2380 98703 0
Fax: +44 (0) 2380 98703 9
info@industrial-needs.com
www.pce-instruments.com/english
TURKEY
PCE Teknik Cihazları Ltd.Şti.
Halkalı Merkez Mah.
Pehlivan Sok. No.6/C
34303 Küçükçekmece - İstanbul
Türkiye
Tel: 0212 471 11 47
Faks: 0212 705 53 93
info@pce-cihazlari.com.tr
www.pce-instruments.com/turkish
ITALY
PCE Italia s.r.l.
Via Pesciatina 878 / B-Interno 6
55010 Loc. Gragnano
Capannori (Lucca)
Italia
Telefono: +39 0583 975 114
Fax: +39 0583 974 824
info@pce-italia.it
www.pce-instruments.com/italiano
DENMARK
PCE Instruments Denmark ApS
Birk Centerpark 40
7400 Herning
Denmark
Tel.: +45 70 30 53 08
kontakt@pce-instruments.com
www.pce-instruments.com/dansk
www.pce-instruments.com
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