G418
RTD Input Field Configurable Isolator |
TECHNICAL
SPECIFICATION (G418)
|
| Input |
|
|
Sensor Types:
Pt100, Pt500, Pt1000 (a: 0.00385W/W/°C or 0.00392W/W/°C); Cu10, Cu25,
Cu100. |
|
Sensor Connection: |
|
3-wire. |
| Common Mode(Input to Ground): |
|
1800VDC,
max. |
|
Zero Turn-Up: |
|
50% of full
scale range |
|
Span Turn-Down: |
|
50% of full scale range |
| Excitation Current |
|
<2mA for
Pt100, Pt500, Pt1000; |
|
|
|
<5mA for Cu100;<10mA for
Cu10, Cu25. |
| Leadwire Resistance |
|
40% of base
sensor resistance or 100W(whichever is less), max
per lead. |
| Leadwire Effect |
|
|
Less than 1% of the maximum
input temperature span |
| Output |
Voltage Output |
|
|
|
Output: |
|
0-5V, 0-10V |
|
Source Impedance: |
|
<10W |
|
Drive: |
|
10mA, max. (1KW, min @10V) |
| Current Output |
Output: |
|
0-1mA,
0-20mA, 4-20mA |
|
Source Impedance: |
|
>100KW |
|
Compliance: |
|
0-1mA; 7.5V,
max.(7.5KW) |
|
|
|
0-20mA; 12V, max.(600W) |
|
|
|
4-20mA; 12V,
max.(600W) |
| LED Diagnostics |
Solid Green: |
|
power on |
|
Flashing Green: |
|
0.5Hz input
under range (<-10%) |
|
|
|
1.0Hz input over range
(110%) |
|
|
|
4Hz input
open circuit (terminal 41) |
|
|
|
8Hz input open circuit
(terminal 42 or 43) |
|
Yellow ON: |
|
= CAL
OK |
| Accuracy
Including Linearity, Hysteresis |
±0.1% typical,
±0.2% max. of the maximum input temperature range configurable for the
RTD type; @ 25°C ambient and 0W lead
resistance. |
| Stability |
|
|
±0.015% of the max. input temperature range for the
RTD type per °C change in ambient temperature, max. |
| Response
Time (10 to 90%) |
|
200mSec., typical. |
| Common Mode Rejection |
|
DC to 60Hz:
120dB |
| Isolation |
|
|
1800VDC between input, output
and power. |
| ESD Susceptibility |
|
Meets
IEC801-2, Level 2 (4kV) |
| Humidity
(Non-Condensing) |
|
|
|
Operating: |
|
15 to 95%( @
45°C) |
|
Soak: |
|
90% for 24 hours( @
65°C) |
| Temperature Range |
|
|
|
Operating: |
|
0 to 55°C ( 32 to
131°F) |
|
Storage: |
|
-25 to
70°C (-13 to 158°F) |
| Wire
Terminations |
|
Screw terminals for 12-22
AWG |
| Power |
Consumption: |
|
1.5W
typical, 2.5 W Max. |
|
Range: |
|
9-30VDC |
| Weight |
|
|
0.54
lbs |
| Agency
Approvals |
|
CSA certified per standard
C22.2, No. 0-M91 and 142-M1987 (File No. LR42272) UL recognized per standard
UL508 (File No.E99775) CE Conformance per EMC directive 89/336/EEC and low
voltage 73/23/EEC. |
|
Diagnostic LED
The G418
is equipped with a dual function LED signal monitor. The green, front mounted
LED indicates both DC power and input signal status. Active DC power is
indicated by an illuminated LED. If the input signal is more than 110% of the
full scale range, the LED will flash at 1Hz. Below -10%, the flash rate is
0.5Hz. If the LED flashes very fast, then the RTD input wires are open circuit.
An 8Hz flash indicates that RTD input (+), terminal 41, is open circuit, or a
4Hz flash indicates that either RTD (-) or RTD Return, terminal 42 or 43, are
open. The CAL LED is on under normal operating conditions. If the CAL LED is
off when the unit is powered, consult the factory for assistance
Configuration
A major
advantage of the G418 is its wide ranging capabilities and ease of
configuration. The G418 has 16 input temperature range settings, six RTD type
settings and five output range settings. Trim potentiometers allow 50% input
zero and span adjustability within each of the 16 full scale input ranges.
Unless otherwise specified, the factory presets the Model
G418 as follows:
| Input: |
Pt100W |
| Range: |
-200 to 600°C |
| Output: |
4-20mA |
|
|
The DC power input accepts any DC source between 9 and 30V;
typically a 12V or 24VDC source is used (see Accessories). Calibration
- After configuring the dip switches, connect the input to
a calibrated RTD source or decade resistance box. Connect the output to the
actual device load (or a load approximately equivalent to the actual device
load value) and apply power.
- Set the calibrator to the desired minimum temperature and
adjust the zero potentiometer for the desired minimum output.
- Set the calibrator to the desired maximum temperature and
adjust the span potentiometer for the desired maximum output.
- Repeat steps 2 and 3, as necessary for best
accuracy.
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