Omron CRT1 - 10-2008 Operation Manual page 503

Temperature Input Unit Functions
Connecting the Devices
Required for Adjustment
480
The following paragraphs explain how to connect the devices that must be
connected to the CRT1-TS04T for user adjustment. Wire the following devices
properly when adjusting the CRT1-TS04T.
■ Reference Voltage/Current Generator and Precision Digital Multimeter
Used to make adjustments at the upper limit and lower limit.
Prepare devices that can generate accurate 0 mV, 20 mV, and 50 mV volt-
ages. Use a precision digital multimeter that can measure the output voltage
and indicate when the voltage/current generator is not producing an accurate
voltage output.
■ Cold Junction Compensator (such as a ZERO-CON 0 ° C Bath) and
Compensating Conductors
Used to adjust the bias compensation value.
The cold junction compensator (the ZERO-CON 0 ° C bath is used in following
examples) is a device that maintains an accurate 0
thermocouple sensors. Use a cold junction compensator compatible with the
sensor being adjusted.
Note When using an R, S, E, B, or W type thermocouple, a K type can be substi-
tuted. Set the ZERO-CON to 0
■ CX-Integrator
Actual adjustments are made from the CX-Integrator windows.
Adjustment Device Connection Diagram
Connect the reference voltage/current generator (STV), precision digital multi-
meter (DMM), and ZERO-CON to the input terminals. Connect to the corre-
sponding input terminals when adjusting inputs 0 to 3.
Compensating
conductors
Note The personal computer (CX-Integrator) is connected through CompoNet in
the above diagram. If a CS1W-CRM21 or CJ1W-CRM21 Master Unit is being
used, the Temperature Input Unit can be adjusted by connecting the CX-Inte-
grator through the Master Unit using a peripheral bus connection.
° °
C (32 F).
CompoNet
CRT1-TS04T
Reference voltage/current generator (STV)
Remove when performing bias compensation.
Precision digital multimeter (DMM)
Use to confirm that the STV is generating an accurate voltage.
Cold junction compensator (such as a ZERO-CON)
Leave open (disabled) until performing bias compensation.
Section 11-5
° °
C (32 F) temperature for
DeviceNet Configurator
CX-Integrator