XITRON 2000I, Руководство пользователя

Страница: 43 / 96

Operating the 2000 Instrument 43
7. If “Active CJC” has been selected, then the unit will return to normal
operation, displaying the present output level and status. If the
instrument is presently performing a thermocouple simulation, then this
data will be used immediately, or it will be used when the temperature to
be simulated is entered. Otherwise, the instrument prompts you to enter
the reference junction’s (reference) temperature for thermocouple
simulations.
8. The display will show the presently stored data similarly to:
+1000.00ºC
9. Next enter the required default reference temperature.
10. Terminate the entry by pressing the required Units/Enter keys (ºC or ºF).
Notes:
1) If a single junction thermocouple is to be simulated, you can select either
0ºC or 32ºF as the reference temperature. The hot junction temperatures will
be entered as the temperature rise of this junction goes above the ambient
temperature, or the present ambient temperature may be entered as the
reference temperature. In this case the entered hot junction temperature will
be absolute temperatures.
2) The reference temperature may be entered in either ºC or ºF units. The
units used for display during the actual usage of this mode are determined by
those used to enter the hot junction temperature.
The instrument will then return to normal operation, displaying the present
output level and status. If the instrument is presently performing a
thermocouple simulation, then this data will be used immediately, otherwise
this data will be used whenever a temperature to be simulated is entered.
For Thermocouple specifications refer to Appendix A— Output Specifications
on page 87.
Deselecting Thermocouple Simulation Mode
To deselect the thermocouple simulation mode, select for a voltage or current
output by pressing the Units/Entry keys (V or A). This method offers the
ability to view the actual output level being used for the Thermocouple
Simulation.