AD2037_15 Datasheet, PDF (3/8 Pages) Analog Devices – 6 CHANNEL SCANNING DIGITAL BOLTMETER THERMOMETER

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Figure 1. AD2037 Block Diagram
linearization and cold junction compensation. just connect
the sensors to the rear terminal block, calibrate them if
necessary, and the AD2038 is ready to make measurements.
AUTO/SCAN
The AD2037/38 while in the Auto/Scan mode, will permit
unattended scanning of all six inpu t channels. The rate of the
Due to the AD590's high impedance current output, it is
insensitive to voltage drops over long lines thus enabling
channel select is 3.2 seconds, 1.6 seconds or 0:8 seconds per
channel. The AD2037 or AD2038 can be used as a stand-alone
remote monitoring with no need for costly transmitters or
instrument and with the Scan input held high will continually
special wire.
scan six channels. When the Scan input is brought low the
AD203 7/38 will continue to cycle and stop at Channel "0".
For normal applications the AD590j can be used and cali-
brated at a single temperature point. Where better linearity or
MANUAL CHANNEL SELECTION
(
sensor interchangeability is needed, the "K" and "L" versions
are available. All versions are available to MIL-STD-883A Class
A switch on the front enables the user to manually select an
individual channel input. As in the Auto/Scan mode, the BCD
B processing. In addition, the AC2626 (an AD590jF mounted
output of the selected channel and the channel number are
in a 3/16 inch diameter, by 6 inch long stainless steel probe)
available. Selection of an individual channel automatically
will soon be available. The probe will be supplied with 3 feet
disables scan and external channel selection is overridden. The
of wire for easy i.nterface to the AD2038.
Mode Output pin indicates when the switch is in this condi-
tion. On special order, meters can be supplied with card edge
control for disabling the switch.
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Figure 2. Scan Timing Diagram
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