Fluke 2180A - Manual (Page 53)

21X0A-002
Option -002
Output
602-1. INTRODUCTION
602-2. The 21X0-002 Option is an analog and digital
output unit. It provides either the2180A or2190A Model
Digital Thermometers with a recording output for a
permanent record when required. The option may be
ordered with the unit for factory installation or is
available as a kit for installation in the field.
602-3. The analog output is available on the rear panel
at two flush banana jacks with the polarity indicated. The
output is a scaled voltage source of 1 millivolt per degree
of temperature, regardless of the temperature scale
selected, with the polarity as read on the display. For
example; a reading of 251° F would output +251 mV dc;
97.3°C would output +97.3 mV dc; and -31.9°F would
output -31.9 mV dc.
602-4. The digital output is a clocked message that can
be in two different formats to match the requirement of
the customer’s equipment. Output on one set of lines is a
bit-parallel, byte-serial message format designed for
printer interface. Also available are the standard EIA
RS232C and current loop bit-serial outputs. Both
formats provide the channel number, the current reading
displayed, and any out of range or open thermocouple
information.
Table 602-1. Specifications
Analog Output
Type: Linearized and isolated.
Voltage: 1.0 mV/ or from —425 mV to 4.5V, 5 mA
max.
Temperature Coefficient: 200 ppm/ C from 25 C.
Noise: ^100 uV at 100 Hz bandwidth.
Accuracy: ±0.1% of reading ±1 mV.
Zero Drift: 200 uV/°C from 25°C,
Warm-Up Time: 5 minutes, to rated accuracy.
Digital Output
Types: Three, E.I.A. Standard RS-232-C Type 2, TTY
current loop, and parallel ASCII.
Connector: 36-pin AMP "Champ”.
Serial Baud Rates: 110, 150, 300, 600, 1200, 2400, 4800,
9600, switch-selectable.
RS-232-C Signals: Transmitted Data, Request to Send,
Clear to Send, Data Set Ready, Signal Common.
Parallel ASCII Signals: Data 8 lines, instrument address 3
lines. Address Valid, Data Valid, Acknowledge, ground,
+5V.
Parallel ASCII Data Rate: Three readings per second.
Parallel ASCII Interface: Plug-to-plug compatible with
similar Fluke equipment. CMOS compatible, drives one TTL load.
TTY Current Loop Signals: Source and controlled sink,
20 mA.
Out-of-Limit Signal: Exclamation point transmitted
with Option 21XO-006 only; not with Y2002.
Battery Operation: 4 to 5 hours typical at 25 C on fully
charged Y2003 or Y2009.
602-5. SPECIFICATIONS
602-6. Specifications for the Output Option, 21XO-002,
are as listed in Table 602-1.
602-7. INSTALLATION
602-8. Options for field installation can be installed
using the following procedure:
1. Disconnect the thermometer from all input
power sources.
2. Remove the screws on the bottom of the case
that fasten the top and bottom of the PTI case
together and remove the top half of the case.
3. Remove the center mounting screw that
attaches the Main PCB to the case and lift the pcb
clear of the case.
4. Attach the four spacers supplied with the
option to the component side of the pcb in the holes
forming a rough rectangular pattern (do not use the
fifth hole on the corner, next to Ul).
602-1