Calibration:tare; Calibration:tare (@<Ch_List>) - HP E1313A Manual

CALibration:TARE

Important Note
for
Thermocouples
Parameters
Comments
Chapter 5
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CAL:STORE TARE
CALibration:TARE (@<
channels specified and stores the value in on-board RAM as a calibration constant
for those channels. Future measurements made with these channels will be
compensated by the amount of the tare value. Use
for voltage offsets in system wiring and residual sensor offsets. Where tare values
need to be retained for long periods, they can be stored in the module's Flash
Memory (Electrically Erasable Programmable Read Only Memory) by executing
the CALibration:STORe TARE
" Compensating for System Offsets" on page 138.
•
You must not use
CALibration:TARE
thermocouple wire. The voltage that a thermocouple wire pair generates cannot
be removed by introducing a short anywhere between its junction and its
connection to an isothermal panel (either the HP E1313/E1413's terminal module
or a remote isothermal reference block). Thermal voltage is generated along the
entire length of a thermocouple pair where there is any temperature gradient along
that length. To CALibration:TARE
an unwanted offset in the voltage/temperature relationship for that thermocouple.
If you inadvertently
CALibration:TARE
CALibration:TARE" on page 139.
•
You should use
CALibration:TARE
thermocouple wire) between the HP E1313/E1413 and a remote thermocouple
reference block. Disconnect the thermocouples and introduce copper shorting
wires between each channel's HI and LO, then execute
these channels.
Parameter Parameter
Name Type
ch_list
< > channel list (string)
• CALibration:TARE
also performs the equivalent of a
uses the Tare constants to set a DAC which will remove each channel offset as
"seen" by the module's A/D converter. As an example, assume that the system
wiring to channel 0 generates a +0.1 Volt offset with 0 Volts (a short) applied at the
Unit Under Test (UUT). Before
reading of 0.1 Volts for channel 0. After
return a reading of 0 Volts with a short applied at the UUT and the system wiring
offset will be removed from all measurements of the signal to channel 0.
Optional depending on necessity of long
term storage.
ch_list measures offset (or tare) voltage present on the
>)
CALibration:TARE
command. For more information see
on field wiring that is made up of
thermocouple wire this way would introduce
a thermocouple wire pair, see " Resetting
to compensate wiring offsets (copper wire, not
CALibration:TARE
CALibration:TARE (@100)
HP E1313/E1413 Command Reference
CALibration
to compensate
CALibration:TARE for
Range of Default
Values
100 - 163
operation. This operation
*CAL?
, the module would return a
, the module will
Units
none
181