2000I & 2000M Instrument’s User Guide, Revision B
34
The “Range Lock” mode can be selected by stepping through the menu, similar to
the operation of all earlier firmware versions. The three possible locked ranges,
20V, 2V, and 20mA, will appear in sequence. With the desired range on the dis-
play, pressing any one of the Units/Enter keys will lock the instrument in the
shown range. Unlocking the ranges can be accomplished in a similar fashion.
When in locked 20V or 20mA range, output levels below 2.2V or 2.2mA respec-
tively, will not cause the instrument to range down. Similarly, when in 2.0V
locked range, the instrument will not range down when programmed to output
levels below 0.22V. The full ranges are continuous therefore, without the level
switching that would occur in auto-range mode. Range locking can be made the
default (power-up) mode by selecting the “Set Defaults” menu choice.
When in 2.0V locked range, the output level cannot exceed 2.2V, irrespective of
the entered value. As before, when programming values which exceed the in-
strument's output level capability, the 2000 instruments will automatically go to
“Standby” operation, as these level requests are illegal commands.
Version F.02 accepts 22mA as a valid output level, where earlier firmware ver-
sions would only accept output current commands up to 21.999mA, and would
cause the instrument to revert to “Standby” state when programmed to output
22mA.
Calculating Output Mode of Operation
The 2000I, 2000M, 2000IN and 2000MN DC power source instruments have the
capacity to compute the actual output level from an
equation
entered in the spe-
cific data units of the instrument being calibrated. For example, a process control-
lers' 4 - 20mA input scaled to yield a 50 to 150psi range of pressure indications.
Further examples of the use of this feature are given in the
Applications
chapter.
Initiating and Setting-Up the Calculated Output Mode of
Operation
The sequence of key presses required to initiate the “Calculated Output” mode of
operation is as described below:
Summary of Contents for Xitron 2000 Series
Page 1: ...USER GUIDE 2000 Family DC Temperature Source Instruments...
Page 2: ......
Page 18: ...2000I 2000M Instrument s User Guide Revision B 18...
Page 42: ...2000I 2000M Instrument s User Guide Revision B 42...
Page 47: ...Using the Memory Options 47...
Page 60: ...2000I 2000M Instrument s User Guide Revision B 60...
Page 91: ......
Page 92: ...2000I 2000M Instrument s User Guide Revision B 92...
Page 95: ...Appendix B General Specifications 95...
Page 97: ...Password Page 97...
