HP 75000 B Series, User Manual, Page: 9 / 14

NOTES
1) When OTD is enabled, the inputs have up to 0.2
µ
A injected into them. If
this current will adversely affect your measurement, but you still want to
check for open transducers, you can enable OTD, make a single scan, check
the CVT for bad measurements, then disable OTD and make your regular
measurement scans. The specifications apply only when OTD is off.
2) Allow 5 minutes before checking for open transducers to allow filter
capacitors to charge.
To enable or disable Open Transducer Detection, use the
DIAGnostic:OTDetect <enable>, (@<ch_list>) command.
•
The enable parameter can specify ON or OFF
•
An SCP is addressed when the ch_list parameter specifies a channel
number contained on the SCP. The first channel on each SCP is:
0, 8, 16, 24, 32, 40, 48, and 56
To enable Open Transducer Detection on all channels on SCPs 1 and 3:
DIAG:OTD ON, (@100,116)
0 is on SCP 1 and 16 is on SCP3
To disable Open Transducer Detection on all channels on SCPs 1 and 3:
DIAG:OTD OFF, (@100,116)
Register Based Programming
The register-based commands shown here are covered in Appendix D of the
HP E1413/E1313 manual. You should read that section first to become
familiar with accessing registers and executing Register-Based Commands.
This section will relate those commands to the parameter values which are
specific to this Plug-on.
When Register Programming an SCP most communication is through the
Signal Conditioning Bus. For that you will use the Register Commands:
SCBWRITE <regaddr> <regvalue>
and
SCBREAD? <regaddr>
8 HP E1509 Fixed Amplifier SCP Register Based Programming