Scanner 2000 Steam Mass Flow Transmitter ... - Spirax Sarco

Scanner ® 2000 microEFM Appendix A
To view logs recorded prior to this date, press the push-button switch repeatedly. The index number will
increase in value (02, 03, etc.) as the logs progress back in time, and the corresponding daily log volumes and
dates will appear on the LCD. The log display will remain in view for 30 seconds before the LCD resumes its
automatic scroll of display parameters.
Explosion-Proof RTD Assembly
The Barton Model 21 RTD, shown in Figure A.6 is a 4-wire, 100-ohm explosion-proof RTD assembly that
can be connected to the Scanner 2000 enclosure without conduit. Factory-sealed, armored leads are covered in
PVC. The RTD assembly can be ordered with tech cable lengths of 5, 10, 30, or 50 ft, and is available with a
6-in. or 12-in. RTD probe. Cable length and probe length are specified in the model part number: 9A-21-XX-
YY where XX is the cable length and YY is the probe length.
The Model 21 RTD is CSA-certified for use in Class I Groups B, C, and D and Class II, Groups E, F and G;
and Class III hazardous area environments.
Each RTD assembly is fitted with 1/2-in. and 3/4-in. connectors for adapting to various size conduit openings
and threadolets. The RTD is field-adjustable for insertion lengths of up to 12 in. For wiring instructions, see
Figure 3.5, page 64.
Probe length
Figure A.6—Explosion-proof RTD assembly
Cable length
Explosion-Proof Communications Adapter
The explosion-proof communications adapter (Figure A.7, page A-4) provides an RS-485 connection for
connecting a laptop or PC to the instrument without removing the instrument cover. When the adapter is
ordered with a Scanner 2000, it is factory installed. It may be relocated to either conduit opening in the
instrument housing.
An RS-232 to RS-485 converter cable (available from Cameron’s Measurement Systems Division) is required
for connecting the adapter to a laptop computer. A variety of converter cable options are listed in the Spare
Parts list of this manual (see page 81).
The adapter is shipped pre-assembled in the Scanner 2000 when it is ordered with the unit. The installed
adapter is comprised of an RS-485 adapter socket, a blanking plug, and a union nut. A plug connector that
mates with the RS-485 adapter socket when the adapter is in use is shipped with the device (uninstalled).
This plug connector should be wired to an RS-485 converter cable, and stored with the cable when the COM
adapter is not in use. Wiring instructions for connecting the plug connector to an RS-485 converter cable are
provided in Figure A.9, page A-5.
A-3