Power Supply
12 to 42 VDC
Current Display
4 to 20 mA
±
A
POWER/
6
OUTPUT
+
4
5
-
Indicator
Adjustable
3
1
2
Resistance
Source
RTD
S
-
+
MC2160X
IRMA
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
ON
3
1 2
5
4
6 7 8
Step 2.1
Steps 2.3 to 2.15
Step 2.16
2.0 Basic Calibration (Factory Calibration)
Basic Calibration Wiring
The Basic Calibration should only be performed with an ambient temperature between
21°C and 29°C. The Basic Calibration was performed on the unit at the factory and
generally does not need to be done again. This procedure initializes the unit by
calibrating the input circuitry. The Basic Calibration should be performed only if a
condition exists as described in the “Calibration Malfunction” section. After completion
of this calibration, the unit needs to be scaled in Field Calibration. The Basic Calibration
procedure is described below.
Note: To abort this calibration and reset to the previous settings, set the BASIC CAL
switch OFF prior to the final setting of the OUTPUT CAL switch (Step 2.15) and turn
off power for 5 seconds. Then turn on power and the previous settings will be loaded.
2.1 Connect an Adjustable Resistance Source with an accuracy of 0.03% to the RTD
input terminals using a third sense wire. Set the RANGE (#7), TYPE (#4),
OUTPUT CAL (#1), and FIELD CAL (#2) switches OFF. Set the BASIC CAL
switch (#3) ON.
2.2 Apply power and allow a 30 minute warm-up period. [Current goes to 3.5 mA
(nominal)]
2.3 Set the OUTPUT CAL switch (#1) ON and then OFF.
2.4 Set the resistance source to 40 ohms and wait 5 seconds.
2.5 Set the OUTPUT CAL switch (#1) ON and then OFF.
2.6 Set the resistance source to 60 ohms and wait 5 seconds.
2.7 Set the OUTPUT CAL switch (#1) ON and then OFF.
2.8 Set the resistance source to 100 ohms wait 5 seconds.
2.9 Set the OUTPUT CAL switch (#1) ON and then OFF.
2.10 Set the resistance source to 175 ohms and wait 5 seconds.
2.11 Set the OUTPUT CAL switch (#1) ON and then OFF.
2.12 Set the resistance source to 250 ohms and wait 5 seconds.
2.13 Set the OUTPUT CAL switch (#1) ON and then OFF.
2.14 Set the resistance source to 315 ohms and wait 5 seconds.
2.15 Set the OUTPUT CAL switch (#1) ON and then OFF.
2.16 Set the BASIC CAL switch (#3) OFF. [Current increases to 3.6 mA (nominal) or
more]
2.17 Perform a Field Calibration. (See Section 1.0)
TEST
OUTPUT CAL
FIELD CAL
BASIC CAL
385/392
OPEN SEN DN/UP
RTD/OHMS
RANGE
RANGE
DIP SWITCH SETTINGS:
ON = 1
OFF = 0
M2161A
1
2
4
5
6
7
8
ON
Test
Pad
RED LION CONTROLS
MADE IN U.S.A.
MODEL IRMA
YORK, PA.
5
AUDIN - 8, avenue de la malle - 51370 Saint Brice Courcelles - Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : [email protected]
