Garnet SeeLevel II 900-D4S Single Manual page 8

the load resistor, which would be read by the remote equipment.
Do not apply more than 30 volts across the outputs, and at least 7
volts must be maintained across them to work properly.
Unlike the digital display, the 4-20 mA signal is analog, so there
may be some degradation in accuracy with it. Consequently, the
remote equipment may read slightly different than the gauge
display.
Display 1-5 V Outputs: The 1-5V signal is available at terminal
blocks inside the display enclosure. One of the 1-5V outputs is
the volume; it derives its output value from the volume display.
1.0V corresponds to an empty tank (for example, 0 barrels) and
the user sets the full scale (5.0V) value of the output. For example,
if the user set the full scale at 400.0 barrels and the barrel reading
was 300.0, then the 1-5V output would be 4.75V (300/400*5V+1V).
These outputs can also be programmed to be off.
The other 1-5V output always indicates the temperature as shown
on the temperature display. An output of 1V corresponds to
-54.4°F (-48°C) and an output of 5V corresponds to +233.6°F
(+112°C), for a scale of 72.0°F/V or 40.0°C/V. This output scale
cannot be changed by programming, but it will be turned on or
off with the volume 1-5V outputs.
These outputs must be provided with external power to operate.
A typical connection would be to connect an external +24 V and
ground from the power source to the 1-5V PWR IN and 1-5V
GND of each 1-5V output terminal, and connect the signal line
to the 1-5V OUT. Do not apply more than 30 volts across the
outputs, and at least 7 volts must be maintained across them to
work properly.
Unlike the digital display, the 1-5V signal is analog, so there may be
some degradation in accuracy with it. Consequently, the remote
equipment may read slightly different than the gauge display.
Display Enclosure: The entire display is enclosed in a weatherproof
fiberglass enclosure with a hinged cover. This provides all weather
operation and easy access to the internal batteries. The enclosure
must always be kept tightly closed when not changing batteries to
prevent water damage to the electronics. Never open the display
enclosure when rain or water could enter the box.
Page 8 900D4S Manual