Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 452

Temperature Input Terminals
Connecting the Devices
required for DRT2-TS04T
Adjustment
The following paragraphs explain how to connect the devices that must be
connected to the DRT2-TS04T for user adjustment. Wire the following devices
properly when adjusting the DRT2-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
■ DeviceNet Configurator (Version 2.40 or Higher)
The actual adjustment operations are performed with the Configurator. Check
the version of the Configurator, because the DRT2-TS04T cannot be adjusted
with an old version.
Refer to the DeviceNet Configurator Operation Manual for details on the Con-
figurator.
Adjustment Device Connection Diagram
Connect the reference voltage/current generator (STV), precision digital multi-
meter (DMM), and cold junction compensator to the input terminals. In the fol-
lowing examples, the devices are connected to input 1, but connect to the
corresponding terminals when adjusting inputs 2 to 4.
Compensating
conductors
Note The personal computer (Configurator) is connected through DeviceNet in the
diagram above. If a CS1W-DRM21 or CJ1W-DRM21 Master Unit is being
used, the Configurator can also be connected through the Master Unit using a
peripheral bus connection. Refer to the Configurator Operation Manual for
details.
° °
C (32 F).
DeviceNet
DRT2-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 7-6
° °
C (32 F) temperature for
DeviceNet Configurator
Ver. 2.40
431