Figure 3-1 – West Control Solutions MRC 8000 User Manual

Page 24

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DOWN:

Used to:

1. Enter a mode
2. Turn a mode Off in the Enable mode
3. Decrease a parameter numerical value
4. View the setpoint for Pen 2 (if provided)
5. Decrease the setpoint value (Press hold)
6. Step display through parameter codes in a mode
7. Work in conjunction with other keys:

a. With the SCROLL key;

1) On power up to alter the model number
displayed
2) Enter Cal/Test functions

b. With the UP key;

1) Lamp test (Press release)
2) Enter the Enable mode (Press and hold for

11 seconds)

RESET: Used to:

Reset the limit output only when the condition that caused the

(Limit Only)

limit has been cleared.

AUTO/MAN: Used to:

1. In the Control mode to enter the Manual mode if proportional

The upper key is for

output(s) selected

Pen 1, the lower key

2. In the Manual mode to enter the Control mode if proportional

is for Pen 2 (if provided)

output(s) selected

FIGURE 3-1

LAMP TEST
From the Off, OPEr or Control modes, all display and status LEDs can be illuminated simulta-
neously by depressing the UP and DOWN keys at the same time. Any defective LEDs will not
light.

CHANGE CHART (also see Changing Charts, Section 5.2)
If the UP and DOWN keys are held depressed for more than 2 seconds but less than 4
seconds, the display will show CChg momentarily. The pen(s) will move to and remain at a
point above the top graduation on the chart and the chart will stop rotating to allow the chart to
be changed. The pens will remain fully upscale with the chart OFF; otherwise, the unit will
continue to operate normally in the current mode. To restore pen(s) position and chart
rotation, press the UP and DOWN keys for more than 2 seconds, but less than 4 seconds.

PEN RESYNCHRONIZATION
To resynchronize the pen(s), depress the UP and DOWN keys for 4 seconds, the display will
show P dn momentarily, the pen(s) are driven to the "Pen Home" position below the bottom
graduation on the chart while the unit resynchronizes their position. After about 14 seconds,
the pen(s) will return to their correct position. All other functions of the unit's present mode
continue to operate normally.

PEN 1

PEN 2

Recorders:
NO KEYS

Limits:
RESET

Recording Controllers:
AUTO/MAN

SCROLL
Key

UP
Key

DOWN
Key

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