West Control Solutions MRC 7000 Recorder Manual - Manual (Page 6)

6
1.1.2 RECORDING
The instrument records the selected process variable on a 10-inch circular chart. One box of
standard charts is provided with each recorder. Charts are available in a wide selection of
ranges. Chart rotation speed is programmable from 0.1 to 999.9 hours per revolution in 0.1
hour increments. The instrument can be ordered with one or two pens. Pen 1 is red and Pen 2
is green. Pens are the disposable fiber-tip type.
1.1.3 DISPLAYS
Each instrument is provided with a digital display and status indicator for each pen provided,
(See Figure 1-1, page 5). The digital display is configured to display the Process Value. The
display in the upper right corner is for Pen 1, the display in the lower right corner is for Pen 2
(if provided). The display includes status indicators for Alarm 1 and Alarm 2, degrees C,
degrees F, engineering units, and setpoint (for limits). See Figure 1-2 (below).
Display resolution is programmable for 0.1 or 1 degree for thermocouple and RTD inputs, and
zero, one, two or three decimal places for other input types.
1.1.4 ALARM
Two alarm indications are standard for each pen on all instruments. Alarm settings are
programmable. Alarm type may be set as process direct or reverse (high or low). Alarm
outputs can be provided by assigning any relay(s) Single Pole/Single Throw (SPST or Solid
State Relay (SSR) driver) to the respective alarm.
1.1.5 LIMIT
Limit indication is standard on limit devices. Limit settings are programmable. Limits may be
High or Low and can be provided by assigning any relay to the respective limit.
1.1.6 PROCESS VALUE RE-TRANSMISSION OUTPUT
If an instrument is specified with mADC current output(s), any of the outputs may be pro-
grammed to operate as a process value re-transmission output. The output is scaleable.
1.1.7 DIGITAL COMMUNICATIONS
The instrument can be ordered with a Digital Communications option that provides the
capability of bi-directional communications with a supervisory computer.
FIGURE 1-2
Digital Display
C
F
U
Alarm 1 Alarm 2
ALRM1 ALRM2
Minus Sign
Limit
Setpoint