ViewSmart 200/2050/2150 Controller User's Manual
Document: UM-1021
Revision Level B
18
2.3.5
DIAGNOSTICS MENU
WARNING: Alarm processing is halted with the
Diagnostics
mode active.
The
Diagnostics
menu in Figure 2.13 is useful for testing standard and optional Input /
Output devices such as relays and 4-20mA outputs. Diagnostic menu items are described
below:
Figure 2.13
Output Zero / Output Span
DAC value (digital to analog converter) menu items are
set at the factory to calibrate optional 10-0223 4-20mA Output boards. If field
adjustment is required, monitor the 4-20mA output and set the
Output Zero
DAC value
for 4mA on each channel then set the
Output Span
DAC value for 20mA on each
channel. These menu items may also be used to drive 4-20mA into receiver devices
without stimulating sensor inputs.
Input Min / Max
ADC (analog to digital converter) menu items are set at the factory
with default values for each channel of either 200 to 1000 counts, or, 400 to 2000 counts.
Direct sensor input options 10-0216, 10-0219 and 10-0220 (see Section 3) default to the
10-bit settings of 200 to 1000 counts. 4-20mA input option 10-0221-2 default to the 11-
bit settings 400 to 2000 counts. These settings may be utilized to affect what input values
provide ZERO and SPAN readouts. For example, if an application required 8mA input to
a 10-0221-2 4-20mA input option to read ZERO at 800 counts, an
Input Min
setting of
800 would accomplish this.
