35040

Operators Manual

Table 2-1. Description of Quantities

Quantity

Description

Units

Comments

 

 

 

 

 

Air Density

 

Calculated by instrument and depends on front panel

ADCF

Correction

None

Temperature and Pressure settings.

 

Factor

 

 

 

 

 

Charge during

 

Electrical charge delivered to readout in response to

QExposure

C

radiation incident upon detector since the last

exposure

 

 

exposure.

 

 

 

QAccum

Accumulated

C

The sum of all charge accumulated due to exposures

Charge

since the RESET/MEASURE button was last pressed.

 

 

 

Previous

 

The sum of all accumulated charge not including the

QAccum_previous

Accumulated

C

current exposure since the RESET/MEASURE button

 

Charge

 

was last pressed.

QElectrometer

Electrometer

C

Factory calibrated electrical charge.

Charge

 

 

 

Q

Charge

C

Calibrated electrical charge.

 

 

 

 

QScaleFactor

Charge Scale

C / C

Calibrates the charge measured by the electrometer.

Factor

Viewed on a Test Function screen.

 

 

QOffset

Charge

C

The electrical charge measured when no incident

Leakage

radiation is present.

 

 

I

Current

A

Calibrated electrical current.

 

 

 

 

IAvg

Average

A

The constant electrical current required to accumulate

Current

charge Q over time TStart to T.

 

 

 

 

Ion

 

ICCF

Ion Chamber

Chamber

Values are field programmable via Customization

Calibration

Calibration

Software.

 

Factor

Units

 

 

 

 

/ A or C

 

ILeakage

Leakage

A

The electrical current measured when no incident

Current

radiation is present.

 

 

IScaleFactor

Current Scale

A / A

Calibrates the current. Viewed on a Test Function

Factor

screen.

 

 

RateMultiplier

Rate Units

s

Specifies the number of seconds the rate divisor is

Multiplier

equal to 1(s), 60(min), 3600(hr).

 

 

T

Q Sampling

s

The time corresponding to Q and I.

Time

 

 

 

Time

Effective Time

s

The time required to accumulate charge QExposure

of Exposure

with a constant electrical current IAvg.

 

 

TOffset

QOffset

s

The time corresponding to QOffset and ILeakage.

Sampling Time

 

 

 

QTimed

Timed Charge

C

The electrical charge delivered during the timer

interval.

 

 

 

 

Predicted

 

The total amount of timed charge that should be

QTimed_Predicted

C

accumulated at the completion of the timer interval,

Timed Charge

 

 

based on the observed delivery rate.

 

 

 

2-4

Page 18
Image 18
Fluke 35040 Quantity Description Units Comments, QExposure, QAccumprevious, QElectrometer, QScaleFactor, QOffset, IAvg