6
3.0
CALIBRATING THE TRANSMITTER (Continued)
An RTD calibrator may be used in place of the resistance source - refer to Figure 3-2.
Figure 3-2. Calibration Setup (RTD Simulator)
Table 3-1. Fahrenheit Temperature to OHMS Conversion Chart
Table 3-2. Celsius Temperature to OHMS Conversion Chart
1
2
3
4
5
ZS
DMM
(4–20 mA)
MONITOR
(–)
(+)
(–)
(+)
250 Ohms
INPUT
WIRE
SPAN
ZERO
RTD
CALIBRATOR
DC SUPPLY
24 VDC
V
Va
allu
ue
e
M
Mo
od
de
ell N
Nu
um
mb
be
err//R
Ra
an
ng
ge
e
T
TX
X9
92
2A
A--
7
7
8
8
9
9
1
10
0
(0 to 100°C) (0 to 150°C) (0 to 250°C) (0 to 400°C)
LO IN
100 Ω
100 Ω
100 Ω
100 Ω
HI IN
138.51 Ω
157.33 Ω
194.10 Ω
247.09 Ω
V
Va
allu
ue
e
M
Mo
od
de
ell N
Nu
um
mb
be
err//R
Ra
an
ng
ge
e
T
TX
X9
92
2A
A--
1
1
2
2
3
3
4
4
5
5
6
6
(-40 to 140°F) (0 to 200°F) (0 to 300°F) (0 to 500°F) (0 to 750°F) (0 to 1000°F)
LO IN
84.27 Ω
92.95 Ω
92.95 Ω
92.95 Ω
92.95 Ω
92.95 Ω
HI IN
123.24
Ω
135.85 Ω
156.96 Ω
197.71 Ω
246.74 Ω
293.56 Ω
