Use; Specifications - ACR Electronics SmartReader Plus Reference Manual

1.9.3

Use

1. Connect a J, K, T, S or E type thermocouple to one or more channels. Make sure that
you observe polarity when making connections. To do this, connect a thermocouple's
negative wire (usually red) to the "-" terminal of the channel you want to use. Connect the
other (positive) wire to the "+" terminal. The following table lists the ANSI color code for
the thermocouple wires:
2. Connect the logger to your computer and run TrendReader. Select the equation number
for each active thermocouple channel (refer to the
3. Check that you have the thermocouple's polarity correct by warming its tip. You will see
the Realtime temperature increase if the wires are connected correctly. If the temperature
decreases, reverse the connections.
NOTE: The inputs are not isolated from each other (they use the same common
"-" terminal internally). This means that the thermocouple tips cannot be touching
each other. If they are touching or are fastened to a conducting surface like a
metal frame, some looping can occur and the readings may fluctuate. They must
be insulated or prevented from making contact with each other electrically. Do
not use grounded thermocouples.
1.9.4

Specifications

Accuracy:
Thermocouple
Specifications are subject to change without notice.
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
Thermocouple Type
J
K
T
S
E
± 0.5% of range plus resolution
J -50 to 600°C
(-55 to 1100°F)
K -100 to 1150°C
(-145 to 2100°F)
T -200 to 400°C
(-325 to 750°F)
S 0 to 1450°C
(32 to 2642°F)
E -50 to 680°C
(-58 to 1250°F)
SmartReader Plus Data Logger
Positive (+) Wire
White
Yellow
Blue
Black
Violet
Range Resolution
0.30°C (0.55°F)
0.50°C (0.90°F)
0.40°C (0.75°F)
1.0°C (1.8°F)
0.24°C (0.44°F)
Negative (-) Wire
Red
Red
Red
Red
Red
Specifications section).
Equation
50
52
54
74
90
48