40
Entek IRD 6666 and 6667 Protection Monitors
Testing Calibration and Relays
Testing Calibration and Relays
To test the monitor’s calibration, you connect a known signal to the terminal block of the
monitor and read the signal from the display on the front of the monitor. You can test the
relays by changing the input signal to cause a relay to change state. This section covers the
following topics:
z
“Signal Inputs for Testing a 6666 Monitor” on page 40
z
“Calibration and System OK Relay Test for 6666 Monitor” on page 42
z
“Signal Inputs for Testing a 6667 Monitor” on page 43
z
“Calibration and System OK Relay Test for 6667 Monitor” on page 45
z
“Alarm Relay Test for 6666 and 6667 Monitors” on page 48
Signal Inputs for Testing a 6666 Monitor
When testing any of the 6600 monitors, you must use the correct input. For the 6666, the
monitor expects a range of resistance corresponding to the temperature sensor type which is
preset at the factory. The following table lists the available 6666 configurations. The
monitor part number is in the form 6666/AAAAAA where “A” indicates the RTD type for
the channel The part number is labeled on the monitor board.
* Do not use with the 6666 monitor.
** American Curve, Alpha = 0.00392
Suffix (“A”)
Range
Resistance
Low (ohms)
Resistance
High (ohms)
B
-20 to 200°C
92.16
175.83
C
0 to 250°C
100.00
194.07
D
0 to 200°C
100.00
175.83
E
0 to 150°C
100.00
157.31
F
0 to 100°C
100.00
138.50
G
0 to 50°C
100.00
119.40
H*
J*
K
-20 to 200°C
8.273
16.78
L
0 to 300°C
100.00
212.03
M
-40 to 100°C
92.76
200.64
N
0 to 300°F
107.80
247.50
P
0 to 300°F
93.06
156.92
R **
0 to 300°F
92.90
178.62
