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3
Ranging the Display
1. Range switches 5 and 6 (
Figure 2
) are for coarse adjustment of the zero (4 mA). Set
switches 5 and 6 for where your low-end reading falls according to
Table 1
. Tenth-degree
resolution can only display temperatures from -50.0 to 199.9. For tenth-degree resolution
set switch 4 to the ON position
(this simply turns on the decimal point)
, then multiply your
desired zero and span temperatures by 10 and choose switch values from both
Tables 1
and
2
using these multiplied counts.
Table 1
Zero Reading (Counts)
Switch
-500 to 0
0 to 500
500 to 1000
4
0.1 degree = ON, 1 degree = OFF
5
ON
OFF
OFF
6
OFF
OFF
ON
2. Switches 1 and 2 are for coarse adjustment of the span (20 mA). To determine the correct
switch settings, subtract the span temperature (the 20 mA temperature marked on the side
of the transmitter) from the zero temperature (the 4 mA temperature marked on the side of
the transmitter).
Example: If your span (20mA) temperature is 200°F and your zero
temperature (4mA) is –100°F, then the Span Reading value is (200°F) – (-100°F) = 300°F.
Per
Table 2
below, the appropriate switch settings are then 1=ON, 2=ON.
Special Notes:
If these switch settings do not allow calibration, use the settings in the neighboring
column. Switch 3 is not used.
Table 2
Span Reading (Counts)
Switch
0 to 500
500 to 1000
1000 to 1500
1500 to 1999
1
ON
OFF
ON
OFF
2
ON
ON
OFF
OFF
3. Set the unit’s designator using
Table 3
. For example, if °C is chosen as the temperature
units, then set switches 7=ON and 8=OFF.
NOTE:
Indicator requires calibration anytime temperature units are changed using dip
switches.
Table3
Temperature Units
Switch
°F
°C
7
OFF
ON
8
ON
OFF
Figure 2
