Teledyne HVG-2020B Instruction Manual page 31

HVG-2020B Instruction Manual
RHIGH=
Runs Pirani high-range calibration with provided pressure. RHIGH=30 performs Pirani curve
fit calculations at the given pressure of 30 Torr. Should only be performed between 20 and
50 Torr.
RMID=
Runs Pirani mid-range calibration with provided pressure. RMID = 0.1 performs Pirani curve
fit calculations at the given pressure of 0.1 Torr. Should only be performed between 0.1 and
1.0 Torr.
SETKG=
Runs Pirani Gas Bend Factor calibration with provided pressure. SETKG=10.1 performs Pirani
Gas Bend Factor calculations at the given pressure of 10.1 Torr. SETKG, without the "=" and
number, performs the same calculation with the current Piezo reading. Should only be
performed between 1.0 and 12.0 Torr. Can only be performed when R8 is set to 7 or 8
(custom gas).
SPAN=
Calibrates the Piezo sensor span based on the current pressure value given. Pressure value is
stored in S28 also.
TEMPSET=
Calibrates the Piezo sensor temperature based on the current temperature value given.
TDAO
DAC zero output (Unlock Write)
In calibration mode, generate output voltage equivalent to 0.00001 Torr on the DAC (value
determined by S51).
TDAS
DAC span output (Unlock Write)
In calibration mode, generate output voltage equivalent to full scale pressure on the DAC
(value determined by S52).
TDAZ
DAC zero count output
In calibration mode, generate output voltage equivalent to 0 counts on the DAC. This will
typically be -0.23 V.
TOFF
DAC adjust complete
In calibration mode, write the D/A converter values to memory.
ZERO
Set Pressure Zero
Sets S15 (Piezo Zero Value) and R15 (Pirani Zero Value) to the current sensor counts. The
effect of this is the current pressure reading becomes the zero-pressure point.
ZRO
Alias for ZERO
For backward compatibility.
EAR99 Technology Subject to Restrictions Contained on the Cover Page
Pirani High-range Cal (Factory Write Only)
Pirani Mid-range Cal (Factory Write Only)
Pirani Gas Bend Factor Cal (Unlock Write Only)
(Factory Write) Span the Piezo Sensor
(Factory Read/Write) Calibrate the Piezo Sensor Temperature
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