Rice Lake Condec UMC600IS - Manual (Page 33)

30 UMC 600IS Installation Manual
4.0 Calibration
The UMC 600IS indicator can be calibrated using single slope span calibration or five-point linearization. Zero
must be calibrated (see Section 4.1) before either span or linearization calibration can be performed.
The analog option is calibrated after the unit is calibrated using option 2. Analog output, (Section 3.3.2) provides
settings for zero, span, and trim adjustments. The settings are all digital therefore no potentiometers are required.
During the trim adjustments for zero/span, the analog output is forced to the zero/span previously selected in option
mode parameters 2.5 and 2.6. While reading the analog output, the trim is increased or decreased from 0 to ± 175
until the reading corresponds with the values entered in parameters 2.5 and 2.6.
4.1 Zero Calibration
Zero calibration is accomplished by the following steps:
1. Clear the scale (no load).
2. Close SW1-3 (dead load). The leftmost display digit should be flashing C as shown in Figure 4-1.
Figure 4-1. Close Switch 3 Figure 4-2. Close Switch 3 and Open Switch 1
3. Adjust dead load potentiometer to obtain a reading at or near zero (see Figure 4-2).
4. Open SW1-3 and close SW1-1 to put the indicator in the digital calibration mode. The display may
change from a zero reading, which is acceptable.
5. Press the ZERO key. The display should read ---CAL , then return to a zero reading.
4.2 Single Slope Span Calibration
1. Place a test weight on the scale and wait for the motion LED to go out.
2. Enter weight value using keyboard. When correct, press ENT . The display will read ---CAL briefly, then
return to the correct reading.
3. Recheck by clearing scale.
4. Open all switches to place the unit in normal weighing mode (Figure 4-3).
Figure 4-3. SW1 with All Switches Open
5. Reinstall the black overlay if previously removed.
6. Close center bar and tighten center bar screws. Seal the unit if used in a legal-for-trade application.
1
6
2
7
3
8
4
9
5
0
CE
ENT
TARE
RECALL
ZERO NET
GROSS TARE lb/kg
CONV PRINT
1 SET
POINT
2 SET
POINT
CAPACITY 600 x 0.1
ZERO
NET
GROSS
lb
kg
MOTION
DEAD LOAD (3)
CONF (2)
CAL (1)
3 4 2 1
OPEN
NORM
FLASHING
DEAD LOAD
POTENTIOMETER
1
6
2
7
3
8
4
9
5
0
CE
ENT
TARE
RECALL
ZERO NET
GROSS TARE lb/kg
CONV PRINT
1 SET
POINT
2 SET
POINT
CAPACITY 600 x 0.1
ZERO
NET
GROSS
lb
kg
MOTION
DEAD LOAD (3)
CONF (2)
CAL (1)
3 4 2 1
OPEN
NORM
FLASHING
3 4 2 1
OPEN