Initial Start-Up; Transmitter Configuration" Menu; Single / Dual Gas Monitor Configuration; Initial Catalytic Bead Lel Monitor Start-Up - AMC -DTR Installation And Operation Instructions Manual

Sensor transmitter

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5 INITIAL START-UP

Figure 15 shows the AMC-DTR XMITTER CONFIG menu used to activate channels, precisely

calibrate 4-20mA outputs and set time / date. Its menus are set at the factory and typically not

needed by the user. To access from any data display, press and hold the NEXT key for 5-

seconds until the screen appears requesting a special key sequence (4-UP keystrokes).

Figure 15: Transmitter Configuration Menu

AMC-DTR-EC's are 2-wire 4-20mA devices and support only one electrochemical sensor.

Addition of the DTR-10-0233 Power Supply board automatically adds the catalytic bead sensor

input and dual 4-20mA outputs. If both the O2/TOXIC and LEL/Current menu items are ON, the

AMC-DTR will function as a dual gas monitor with both sensor inputs and 4-20mA outputs

active. Either input may be turned off for single gas EC or LEL monitors.

AMC-DTR LEL Monitors are factory equipped with a local Simple or Smart Catalytic Bead LEL

sensor, which rarely require adjustments, other than routine calibrations, to provide accurate

LEL readings. However, after installation the checks in the following sub-sections should be

performed to insure proper operation. In addition, alarm levels, Measurement Name ASCII

fields and other variables may require attention by users in order to best serve their application.

CAUTION:

Sensor Volts in excess of the rated values may destroy catalytic bead sensors. AMC-DTR

sensors are rated for 2 volts.

The voltage displayed on the LCD is monitored across TB1-REF and TB1-ACT on the AMC-

DTR Power Supply board (Figure 6) and may be confirmed with a voltmeter. This TB-1 value is

correct for locally mounted sensors only. Sensors mounted more than a few feet away from the

AMC-DTR may receive a lower voltage due to the inherent voltage drop across sensor wiring.

Remote mounted sensors must have their sensor voltage (across ACTIVE and REFERENCE

beads) measured AT THE SENSOR end of the cable. The AMC-DTR setting will require a

AMC-DTR Sensor Transmitter User Manual

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