|
SR2300
RTD INPUT
FIELD RANGEABLE
TWO-WIRE TRANSMITTER
FEATURES
 | Provides DC Output Proportional to an RTD Input |
| 3-Wire or 2-Wire, 10 ohms to 1000 ohms RTDs |
| Test Points for Loop Current Monitoring Without Breaking Loop Circuit |
| Linearized for Platinum RTDs |
| Unlimited* Choice of Input Ranges via Interchangeable Range Cards |
| Reverse Polarity-Protected |
| 50 mm Diameter Case - 33 mm Mounting Hole Spacing |
| NEMA-4 and Explosion-Proof Connection Heads Available |
| Low Cost |
| Intrinsically Safe Design with FM and CSA Approvals Pending |
| 5 + 5 Year Warranty |
DESCRIPTION
The SR2300 is a low-cost, reliable, RTD input two-wire transmitter for field or
panel mounting in various industrial housings and enclosures. It provides
a DC output current (4/20 mA) proportional to an RTD input.
Filtering and conditioning to reduce susceptibility to transients and noisy
operations provide accurate, trouble-free operation. Ranging is
accomplished via a plug-in card which characterizes the input for the desired
RTD type and sets the temperature range. Linearization is provided for
platinum RTDs.
The SR2300 utilizes a single constant current source to excite the RTD. An
accurate and stable leadwire compensation circuit uses the third lead of a
3-wire RTD to compensate for the RTD lead resistance. The output ZERO and
SPAN controls are accessible through the top of the case. Zero is
adjustable ± 20% and span ± 15%. Terminations are made to screw terminal
connectors on the top of the case.
Test points located on the SR2300 front panel allow monitoring of loop current
value, using a milliammeter, without breaking the loop current.
TYPICAL APPLICATION
Remote temperature data acquisition.
MOUNTING
The SR2300 can be mounted in a connection head (TSH-A6L), explosion-proof
housing (XJAY), or on a flat surface using the two 4.5 mm diameter mounting
holes provided. Standard 33 mm hole center spacing allows for mounting in most
connection heads. The 5.08 mm center hole allows clearance for input wiring or
for a 3/16 diameter temperature probe. An optional DIN-Rail mounting kit is
available (DMP2000).
SPECIFICATIONS
RTD INPUT
3-Wire or
2-Wire,
10 ohms to 1000 ohms
Pt, Ni,
Cu
INPUT RANGE
select any range from
-100°C to
850°C
(min span
20°F/10°C)
EXCITATION CURRENT
2.4 mA (10 ohms to 500
ohms)
0.24 mA (>500
ohms)
OPERATING TEMPERATURE
-13°F to
176°F
-25°C to
80°C
LINEARITY
(Pt RTD, output vs.
temp)
± 0.03% of span
(fullscale temp < or = 400°C)
± 0.075% of span
(fullscale temp >
400°C)
(others, output vs. resistance)
± 0.01% of span
POWER
10-36 VDC, polarity protected
SUPPLY VOLTAGE EFFECT
0.02% of span max, 10 to 36 V
|
COMMON MODE REJECTION
120 dB, DC to 60 Hz
MAX LOAD RESISTANCE
=[(V supply - 10)/20 mA] kilohms
RESPONSE TIME
- Step Change
150 ms for 99% of final value
ACCURACY
± 0.1% of span or
0.02 ohms,
whichever is greater
OUTPUT RANGE
4/20 mA
Current limited = 35 mA
TEMPERATURE STABILITY
± 0.02% of span per°C
*
Within specified range limits |
ORDERING INFORMATION
| SR2300, |
( |
|
) |
, |
( |
|
) |
|
|
|
|
| |
|
|
|
| |
|
|
|
|
|
| |
|
|
|
| |
|
|
Temperature Range |
|
|
| |
|
|
|
|
|
|
(specify°F
or°C) |
|
|
| |
|
|
|
|
|
|
|
|
|
| |
|
Sensor Type:
4270 - 10 Ohm Copper .00427
3850 - 100 Ohm Platinum .00385
3920 - 100 Ohm Platinum .00392
xxxx - Other RTD (specify) |
Example: SR2300,3850,0/250F
|
