Rice Lake Static Weighing - Manual (Page 6)

2 CW-90/90X Checkweigher
1.2 Overview
The CW-90/CW-90X is a high-speed digital weight indicator and scale base programmed to compare weight
readings with predetermined tolerance limits defining an “accept” band.
If the current weight reading is within the acceptable range, the green “ACCEPT” LED is illuminated. If the
current weight reading is less than the acceptable range, one or more of the red “UNDER” segments is illuminated.
If the current weight reading is greater than the acceptable range, one or more of the yellow “OVER” segments is
illuminated.
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Features include:
• Large .8” (20.3 mm) LED display with “under,” “accept,” and “over” bands
• Full numeric keypad (CW-90 only)
• Four configurable digital inputs/outputs
• Two independent communication ports (2) full duplex, (1) unidirectional active 20 mA current loop
1.3 Operating Modes
The CW-90/CW-90X has two modes of operation:
Normal (Weighing) Mode
Normal mode is the “production” mode of the indicator. The indicator displays the gross or net weight, depending
on whether a tare has been entered. LED annunciators indicate the type of weight value.
Menu mode
Most of the procedures described in this manual, including configuration and calibration, require the indicator to be
in Menu mode.To enter Menu mode, press the
MENU key (if the Audit jumper is in the “ON” position).The
indicator displays “AUDIT.”

If the Audit jumper is in the “OFF” position, remove the large fillister head screw from the bottom of the enclosure.
Insert a screwdriver into the access hole and press the setup switch once to enter Menu mode.
1.4 Keypad Functions
Key Function
Turns the CW-90/CW-90X unit on/off.
Note
If the PC jumper is set to SW, the POWER button must be used to turn the unit on and off. If
the PC jumper is set to ON, the unit will automatically power on when it’s plugged in and the
only way to turn it off is to unplug power.
Enters Menu mode, allowing configuration if the Audit jumper is in the “ON” position. Also used as an “escape”
key in Menu mode.
Sets the current gross weight to zero, provided the amount of weight to be removed or added is within the
specified zero range and the scale is not in motion. The zero band is defaulted to 1.9% of full scale, but can be
configured for up to 100% of full scale.
Note
1.9% is required for legal for trade applications.
Switches the weight display to an alternate unit. The alternate unit is defined in the Setup menu, and could be
kg, g, lb, oz, or lb/oz. Conversions of the weight reading, the Tare value, the Over value, and the Under value
occur when the unit of measure is changed with the Units key.
Note
When working in lb/oz, any entered values need to be entered in ounces. This applies when
entering over, under, target, and tare values.
Sends “on-demand” serial information out the serial port, provided the conditions for standstill are met. PRINT
will be displayed while the unit prints.
Table 1-1. Keypad Functions