UEi Test Instruments DRS220 - Manual (Page 6)

DRS220 User’s Guide
8
Over Range Indication
If the weight applied to the weighing platform exceeds the maximum capacity of the
DRS220 (100 kg), a single “1” will be shown on the left side of the display. To
prevent damage to the DRS220, immediately remove the weight from the platform.
Hold Mode
A special feature of the DRS220 allows the emptying or replacing bins or containers
used for weighing without affecting the weight shown on the display. This Hold
Mode may be used as follows:
1. Allow load to settle until display is steady.
2. Press . The HOLD indicator will turn on and the current weight is now locked
on the display.
3. Remove, empty, or replace objects, bins, or containers on the platform.
4. Wait 5 seconds for the new load to stabilize.
5. Press . The HOLD indicator will turn off. Measurements will continue from
where they left off prior to initiating Hold Mode.
Programming
With the DRS220, a programmable threshold weight will sound an alarm. The alarm
will sound when the displayed weight (either positive for increasing weight, or
negative for decreasing weight) equals the programmed weight. To program the
alarm, perform the following steps:
1. Set up the DRS220 with the desired units and resolution as described in the
Quick Start Setup section above.
2. If measuring decreasing weight, place the objects or container with the objects or
material that will be removed on the weighing platform.
3. Press to start the SET Mode, indicated by the SET annunciator on the LCD
display.
DRS220 User’s Guide
9
4. Press and/or hold the or keys to set the desired alarm set point. To
change the set point faster, press . This will activate the FAST SET mode
which will change the set point 10x faster than normal. Press again to return
to the normal speed SET mode.
5. Press . The display will automatically change to zero and the RUN indicator
will show to indicate that the program is running.
6. When the applied (or removed) weight exceeds the programmed amount, the
alarm will sound and the DONE indicator will flash on the display.
7. Press any key to stop the alarm.
8. To cancel the RUN mode at any time, press the key.
NOTE: The RUN mode can only be initiated from the SET mode. If you cancel the
RUN mode by pressing , and wish to RUN again, press (the previous set
point will be restored) followed by again. The display will be zeroed when the
program restarts. You may program the SET mode without starting the RUN mode
by pressing after setting the program set point. The new value will be saved
until next time the SET mode is activated. can be used during the RUN mode
similarly as described in the HOLD MODE section. The CM-500 provides additional
functionality when using the RUN mode. Refer to the CM-500 User’s Guide for
details.
Tank Capacity Mode
It is often convenient to know the relative amount of material (i.e. refrigerant)
remaining in a container (tank). The DRS220’s Tank Capacity Mode allows a
continuous display of the percentage of material remaining in a tank. In order to
compute the percentage accurately, the DRS220 must be trained to know the
weights of an empty and full tank. To train the DRS220 Tank Capacity Mode,
perform the following steps: