Simulation.24 - Omega Engineering CL521 Operator's Manual

If the measuring device is intended for use so that the reference junction temperature is
controlled at some temperature other than 0°C, this temperature must be entered into
Register 9 in °C. For example, to enter 50°C into Register 9, enter;
5 0 STO 9
7.2.2 Simulation
Turn on the CL521 by pressing the ON key. If the Cl.521 was most recently used to
perform a similar simulation, it is ready to use once the power is switched on. If it has
not recently been used for simulation:
Check that the MEASUREMENT/CALIBRATION switch is in the CALIBRATION position.
If thermocouple measurement is selected, the display indicates a value of 0.
If the arrow at the top of the display indicates Pt100, press the ENT key. The CL521
changes automatically to thermocouple measurement and displays a value of 0.
If the displayed value is in millivolts (the arrow at the right edge of the display points to
mV), change the units to temperature by pressing the TC/mV key once.
Select the required thermocouple type by repeatedly pressing the TC TYPE key until the
arrow at the top of the display indicates the requested type.
Select the required reference junction compensation mode by repeatedly pressing the
CJ MODE key until the arrow at the left edge of the display indicates the required mode.
If the Open Input Check used in the instrument being checked disturbs the CL521
operation, it must be switched off during the time of simulation.
Thermocouple
type
Reference
junction
mode
Switch on
Temperature unit
Temperature/mV selection
Store value into
• a memory register
Recall
a register value
Enter a simulation
value to the TC & mV
connection
Increase/decrease
the simulation value
Figure 7-4. CL521 Calibrator/Thermometer
24