Minco TT190, TT230 Operating Instructions

MINCO

TT190

TT190 and TT230

2-wire Temperature Transmitters

Installation and Operating Instructions

INTRINSICALLY SAFE

NON-INCENDIVE

MINCOMINCO PRODUCTS, INC.

TT230

7300 Commerce Lane, Minneapolis, Minnesota 55432-3177 U.S.A.
Telephone: [phone] FAX: [phone]

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Description

Models TT190 and TT230 are 2-wire temperature transmitters for T/C (thermocouple thermometers).
These transmitters are FM-approved for use in Class I, Divisions 1 or 2, Groups A, B, C, and D
hazardous locations and appear in the approval guide as IS/I/1/ABCD and NI/I/2/ABCD. The
TemptranTM converts the T/C's signal into a 4 to 20 mA current. The current changes according to
the range marked on the Temptran: 4 mA at the lowest temperature of the range, rising to 20 mA at
the top of the range. The leads that supply power also carry the current signal.

Installation

If installing the Temptran in a hazardous location, the installer must adhere to installation
requirements as set forth by the National Electrical Code (NEC) and any other applicable codes and
standards. See pages 3-7 for further information on installing these transmitters in a hazardous
location.

Locate the Temptran near the T/C, in an area where the ambient temperature stays between -40 and
85 C (-40 and 185 F). Mount with #8 machine screws using the two mounting holes provided in
the transmitter case.

Connect the Temptran as shown below, observing the +/- polarity of the current loop and T/C
connections. Maximum DC supply voltage = 35 VDC. The T/C connections for the Temptran in the
wiring diagram below must be connected as shown or the transmitter will not function properly.

For model TT190, the Temptran has been factory-calibrated for its marked temperature range. Do
not change its zero and span adjustments.

Wiring Diagram

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Installation of TT190 and TT230 TemptransTM in Class I, Divisions 1 or 2, Groups A, B, C, and D
hazardous locations.

Read these instructions thoroughly before installing transmitters.
Per Factory Mutual,

1) Installation shall be in accord with these instructions and the National Electric Code.

2) If installing in a Class I, Division 1 hazardous area, then refer to dwg. INST. 704, "CONTROL
DOCUMENT, SYSTEM APPROVALS FOR INTRINSICALLY SAFE TRANSMITTERS" on pages
5-7 of this manual.

3) If installing in a Class I, Division 2 hazardous area, the transmitters must be mounted in a vent­free enclosure, meeting the "Electrical Utilization Enclosure Requirements" stated below with
which only the Approved equipment will be installed. All unused openings should be sealed.

4) Tampering and replacement with non-factory components may adversely affect the safe use of
the system.

Electrical Utilization Enclosure Requirements (Required for Division 2 areas only)

1. Each of the transmitters must be mounted within an enclosure to prevent personal injury resulting

from accessibility to live parts. This enclosure must comply with the requirements listed below.
Further details of the enclosure requirements may be found in ANSI/ISA Standards S82.01, S82.02,
and S82.03.

1.1 Accessibility - The transmitters must be installed within the enclosure so that its circuits are
accessible by the use of a tool only. A part is accessible when a) the IEC articulate accessibility
probe applied in every possible position to the exterior or exposed surfaces, including the bottom,
or b) the IEC rigid accessibility probe applied with a maximum force of 30 newtons (6.75 lbs
force) in every possible position to the exterior or exposed surface, including the bottom, touches
the part.

1.2 Protection From Fire - If the enclosure is non-metallic, it shall have the proper flammability
rating as detailed within ANSI/ISA Standard S82.01.

1.3 Grounding - A metallic enclosure must have a protective grounding terminal and be marked
as such. The size of the ground terminal is to be equivalent to the size of the supply circuit
conductor terminals. All accessible non-current conductive parts must be bonded to the
protective grounding terminal.

1.4 General Construction - The equipment enclosure, or parts of the enclosure, required to be in
place to comply with the requirements for protection from electric shock, personal injury,
protection from internal parts and wiring, and external cord and cable assembly strain relief shall
comply with the following tests for mechanical strength:

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