![]() 4) Tampering and replacement with non-factory components may adversely affect the safe use of the systemģ Electrical Utilization Enclosure Requirements (Required for Division 2 areas only) 1. 3) If installing transmitters in a Class I, Division 2 hazardous area, then 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. The Simple Apparatus referenced in these pages is the RTD temperature sensor. 704, "CONTROL DOCUMENT, SYSTEM APPROVALS FOR INTRINSICALLY SAFE TRANSMITTERS" on pages 5-7 of this manual. 2) If installing transmitters in a Class I, Division 1 hazardous area, then refer to Minco INST. Per Factory Mutual, 1) Installation shall be in accord with these instructions and the National Electric Code. Read these instructions thoroughly before installing transmitters in a hazardous area. Wiring Diagram Installation of TT176, TT216, and TT676 Temptrans TM in Class I, Divisions 1 or 2, Groups A, B, C, and D hazardous locations. Do not change its zero and span adjustments. For models TT176 and TT676, the Temptran has been factory-calibrated for its marked temperature range or else for a specific RTD. The RTD connections for the Temptran in the wiring diagram below must be connected as shown or the transmitter will not function properly. Connect the Temptran as shown below, observing the +/- polarity of the current loop. Mount with #8 machine screws using the two mounting holes provided in the transmitter case. Locate the Temptran near the RTD, in an area where the ambient temperature stays between -40 and 85 C (-40 and 185 F). ![]() ![]() Refer to pages 3-7 for further information on installing these transmitters in a hazardous location. ![]() 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. Request Minco Application Aid 15 for more information. The leads that supply power also carry the current signal. 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 Temptran TM converts the RTD's signal into a 4 to 20 ma current. These transmitters are FM-approved for use in Class I, Divisions 1 & 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. Telephone: (763) / FAX: (763)Ģ Description Models TT176, TT216, and TT676 are 2-wire temperature transmitters for RTD (resistance temperature detector) thermometers. The transmitter can be mounted at the field location in a standard DIN form B head or on a DIN rail inside a local box.1 MINCO TT176, TT216, and TT676 2-wire Temperature Transmitters Installation and Operating Instructions INTRINSICALLY SAFE NON-INCENDIVE TT216 TT176/TT676 MINCO MINCO PRODUCTS, INC Commerce Lane, Minneapolis, MN U.S.A. Because amplification and conversion of the input signal is performed within a few feet of the sensor, electrical interference in noisy environments is eliminated. Temperature measurement can be done with one of several RTD’s: 100 Ω, 1000 Ω platinum, 100 Ω Nickel and 1000 Ω Nickel. Drawing power directly from the signal line, only 2 wires are needed for power and signal. This industry-standard 4-20mA signal travels thousands of feet over a pair of wires, ignoring electrical interference and bringing the temperature, accurately, into your computer or controller. This transmitter amplifies a signal from a RTD or linear resistance, and it turns the signal into a current which increases from 4 to 20 milliamperes as the temperature or input signal increases.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |