Dynisco SC170 Owner's manual

MODEL SC170MODEL SC170
MODEL SC170MODEL SC170
MODEL SC170
TWO-WIRE “SMART”TWO-WIRE “SMART”
TWO-WIRE “SMART”TWO-WIRE “SMART”
TWO-WIRE “SMART”
SIGNAL CONDITIONERSIGNAL CONDITIONER
SIGNAL CONDITIONERSIGNAL CONDITIONER
SIGNAL CONDITIONER
INSTALLATION AND OPERATION MANUALINSTALLATION AND OPERATION MANUAL
INSTALLATION AND OPERATION MANUALINSTALLATION AND OPERATION MANUAL
INSTALLATION AND OPERATION MANUAL

Contents
PREFACE 1
1.0 INTRODUCTION ............................................ 1
2.0 UNPACKING AND INSTALLATION ............. 2
2.1 Unpacking .............................................. 2
2.2 Mechanical Installation ............................ 3
2.2.1 Weather Proof Housing......................... 3
2.2.2 Thermowell Mounting ............................ 3
2.2.3 Pipe Mounting ........................................ 5
2.2.4 Surface Mounting .................................. 6
2.3 Electrical Installation ............................... 6
2.3.1 Output Terminals ................................... 7
2.3.2 Case Ground .......................................... 7
2.3.3 Input Terminals ...................................... 8
3.0 SIGNAL CONDITIONER OPERATION .......... 9
3.1 In a Hurry? ............................................. 9
3.1.1 Factory Configuration ............................ 10
3.1.2 Analog Operating Mode......................... 10
3.1.3 Operation With a Display ...................... 11
4.0 CONFIGURATION USING
THE TWO-LINE DISPLAY............................... 12
4.1 Entering the Display Mode ..................... 12
4.2 Display Mode Operation ........................ 13
4.3 Select Sensor Input................................. 14
4.4 Change Zero .......................................... 15
4.5 Change Full Scale.................................... 17
4.6 Select Fail Safe Reporting ....................... 17
4.7 Transmitter Fail Safe .............................. 17
4.8 Trim 4.0mA ........................................... 18
4.9 Trim 20.mA ........................................... 19
5.0 ACCESSORIES & INFORMATION .................. 21
6.0 SPECIFICATIONS ............................................ 22

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1.0 INTRODUCTION
The SC170 is a programmable, two-wire, isolated signal conditioner
that accommodates DC milliamperes, DC millivolts, DC volts,
Potentiometer (slidewire), two and three wire resistance as inputs.
This instrument is exceptionally versatile and can be used when any
one or all of the following requirements exist:
• Signal isolation
• Conversion of signal types (e.g., Millivolt input to 4 to 20mA
output)
• User-tailored noise filter to eliminate noise without damping
• Local digital display in engineering units
• Bar graph display indicating percent of span
• Local configuration without external calibration sources
• NIST traceable calibration warranted for 24 months.
The SC170 achieves its performance through the use of digital signal
processing and microcontroller technologies. Many of the features,
such as the automatic self diagnostics and the exceptional temperature
stability, are transparent to the user.
It is simple to setup and operate the SC170 signal conditioner. It can
be set up, with a smart local display, the LD-2, and a two-key
keyboard, the KB-2. These accessories facilitate local configuration
and ranging of the signal conditioner. In operation, the local LCD
display indicates the measured signal and units of measurement to six
digit resolution, an analog percent of range indication and also
provides a seven-character alphanumeric label or message indication.
The SC170 signal conditioner does not have any potentiometers or
switches to set, and there are no user-serviceable components inside
the enclosure. It has a two-year NIST traceable calibration warranty.
Opening the enclosure will void the manufacturer’s warranty.
This manual is divided into several main sections. Section One,
INTRODUCTION, describes briefly the signal conditioner and the
organization of this manual. Section Two, UNPACKING AND
INSTALLATION, contains much useful information for the first time
installer. Section Three, SIGNAL CONDITIONER OPERATION,
contains analog mode of operation. Section Four, CONFIGURATION,
THE DISPLAY MODE, explains display mode. Section Five,
APPLICATIONS INFORMATION, contains additional applications
information. Section Six, SPECIFICATIONS, deals with the signal
conditioner specification.

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2.0 UNPACKING AND
INSTALLATION
2.1 UNPACKING
Remove the Packing List to check off the actual equipment received.
If you have any questions on your shipment, please call DYNISCO
INSTRUMENTS Customer Service Department at [phone].
Upon receipt of shipment, inspect the container for any signs of
damage in transit. Especially take note of any evidence of rough
handling. Report any apparent damage immediately to the shipping
agent.
NOTE: The carrier will not honor any claims unless all shipping
material is saved for their examination. After examining and
removing the contents, save the packing material and carton in the
event reshipment is necessary.

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2.2 MECHANICAL INSTALLATION
2.2.1 Weather Proof Housing
Optional weather-proof and explosion-proof housings are available.
The XP-HDC2-L accommodates a signal conditioner when the display
option is not required. The XP-HDGC2-L, with its glass window,
may be used when the display option is desired. These housings have
appropriate mounting plates in the bottom to attach the SC170 in any
of four orientations 90°apart. In addition special captive 6-32
machine screws are installed on the signal conditioner to facilitate
installation and removal. These captive screws are installed only if the
signal conditioner and housing are ordered at the same time. Figure
2-1 indicates the dimensions of these housings.
2.2.2 Conduit Mounting
The weather-proof housing has two 1/2” female NPT conduit entries.
These can be used to mount the housing directly onto the 1/2” male
NPT ends of conduits. Alternatively, a 1/2” union coupling can be
placed between the weatherproof housing and the wiring from the
signal source.
Fig. 2-1 Optional Weather Proof Housing

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Fig. 2-4 Din-Rail Kit
Fig. 2-2 XP-HDGC2-L
Fig. 2-3 XP-HDC2-L

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2.2.3 Pipe Mounting
A stainless steel bracket, the PB-2, is available for mounting the
weatherproof housing onto any 2" pipe in any of four operations.
The housing is attached to the bracket as shown in Figure 2-5.
Fig. 2-6 Pipe Mounting Bracket with XP-HDC2-L
Fig. 2-5

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2.2.4 Surface Mounting
The weatherproof housings, type XP-HDC2-L and the XP-HDGC2L,
have two mounting ears allowing them to be attached to any flat
surface by means of two bolts. If the additional weather resistance is
not required, the SC170 can be mounted directly on a flat surface by
the two mounting ears found on these units. In applications requiring
several signal conditioners, these can be mounted on the plate
normally found inside of NEMA-4 rated rectangular metal enclosures.
2.3 ELECTRICAL INSTALLATION
The SC170 has two groups of terminals.
Terminals 1 and 2 also serve as the mounting screw locations for the
LCD display. These terminals, designated as SET 1 and SET 2, in
conjunction with terminal 7 as common, are used for setup,
configuration and trim purposes. The SET 1 and the SET 2 terminals
are marked as such and are located near the upper left and upper
right areas of the signal conditioner cover. There is a slanted line
pointing directly from the word SET 1 towards the corresponding
terminal inside of a round black insulating area. The SET 2 terminal
can be found similarly on the right-hand side of the signal conditioner.
Terminals labeled 3, 4, 5, 6, and 7 are used in various connections to
accommodate the different input signals. Terminal 8 is used to ground
the enclosure.
Terminals 9 and 10 are the 4 to 20mA output terminals. These are
normally connected to the corresponding polarity terminals of the
power supply of the current loop. Refer to Figure 2-7 for the
terminal connections arrangement.
Fig. 2-7 Terminal Connections

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2.3.1 Output Terminals
The output terminals 9 and 10 are connected to a power supply
having a nominal 24 Volt DC voltage and capable of supplying 100mA
for the SC170. In the analog mode, these signal conditioners require a
maximum of 23mA. The + OUT and - OUT terminals of the power
supply. The maximum series resistance in the circuit (including wiring
lead resistance) can be calculated using the formula:
Vs - 12
Rs = ————————
0.023
The following chart gives maximum series resistance:
2.3.2 Case Ground
Terminal 8 provides a connection to the metal enclosure of the signal
conditioner. For safety, optimum performance and EMI immunity the
case of the instrument should be connected to a good local earth
ground. When using grounded sensors that are connected to the
local electrical ground, then the signal conditioner case should be
connected to that same ground point.
Max. Series Resistance Rs Supply Voltage Vs
1300 ohms 42.0 Volts
520 ohms 24.0 Volts
417 ohms 21.6 Volts
250 ohms 18.0 Volts
0 ohms 12.0 Volts

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2.3.3 Input Terminals
2.3.3.1 DC Milliampere Input
Apply signal to 6(+) and 7(-).
Fig. 2-8 Typical Connection for Milliampere Input
2.3.3.2 DC Millivolt Input
Apply signal to 5(+) and 7(-).
Fig. 2-9 Typical Connection for Millivolt Input
2.3.3.3 DC Volt Input
Apply signal to 3(+) and 7(-).
Fig. 2-10 Typical Connection for Voltage Input
–
+