Murphy Dual Temperature SWICHGAGE MDTM89 manual

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Table of contents for the manual

  • Page 1

    MDTM-8907N page 1 of 4 MDTM-8907N Revised 10-07 Section 10 (00-02-0165) Description Murphy's model MDTM89 is an electronic, dual-temperature moni- tor . It monitors two thermocouples, displays the temperature of the thermocouple selected, and has adjustable trip points for each input. A toggle switch provides for selection of the thermocouple [...]

  • Page 2

    MDTM-8907N page 2 of 4 One Thermocouple Only Even though the MDTM89 is a dual temperature monitor , it will monitor and display one temperature with equal results. When monitoring one temperature, always jumper the unused thermocou- ple terminals on the back of the MDTM89 with a short length of wire. The unused channel will display approximate ambi[...]

  • Page 3

    MDTM-8907N page 3 of 4 3. When connecting the thermocouple extension wire to your thermo- couple leads, twist the wire connections, then install wire nuts, such as ceramic type, which have no metal insert. DO NOT SOLDER. T o prevent problems of interference from electrical noise, DO NOT route thermocouple wires in the same conduit or within 12 inch[...]

  • Page 4

    MDTM-8907N page 4 of 4 12/24 VDC 12/24 NC NEG TC1 TP1 TC2 See T able 1 for wire color code. See T able 1 for wire color code. Load Load Power Source Power Source Thermocouple TC1 Input Thermocouple TC2 Input TP2 H N 120 V AC/24 VDC Isolation Module 120 V AC 24 VDC ISOLA TION MODULE TC1 TC2 See T able 1 for wire color code. See T able 1 for wire col[...]