RANGE:
Charge: 100fC - 20,000nC
Current: 10fA - 200nA
Exposure: 100µR - 20,000R
Exposure Rate: 1µR/min - 2000R/min
Reproducibility: 0.5% of
reading
Linearity: 0.3% of reading
Leakage Current: Less than 3 x 10-15 A
Calibration Accuracy:
Charge: 0.5% of full scale
Current: 1.5% of full scale
Input Impedance: >1014
ohms
STABILITY:
Temperature: .01% / °C, 10° to 40°C
Long Term: 0.5% / year
Display: 4 1/2 Digit LED
with unit annunciators.
Bias Supply: Internal: 0 to
± 350 Volts, adjustable in 3 volt increments. External: 0 to ± 400 Volts, via
rear panel. Bias voltage may be read on display by pressing READ.
Calibration Factors: Eight
user programmed factors, selectable by a rotary switch.
Power: Internal
rechargeable batteries, automatically trickle charged whenever unit is plugged
in. Overcharge protection. 120V or 220V charger provided.
Connectors: Input triaxial
BNC connector. RS-232 DB25 rear connector configured as DCE. Banana jacks on
rear panel for analog output (0-10V) and external bias input.
Dimensions: 9"W x 13" D
x 5" H (22.8 cm x 33 cm x 12.7cm)
Weight: 7.34 lbs (3.33 kg)
MODE:
CHG: Places the unit in the charge measurement mode.
CUR. Places the unit in the
current measurement mode.
EXP.: Places the unit in
the exposure measurement mode. Instrument measures charge, and converts to
exposure units based upon user selected chamber calibration factor. SI units are available.
RATE: Places the unit in
the exposure rate mode. Instrument measures current then converts to exposure
rate units
based upon user selected chamber calibration factor.
ZERO: Zeros the
electrometer by measuring and compensating for offset levels.
HOLD: Acts as a toggle to
suspend / re-activate display update.
RESET: Resets the display
to zero.
ELECTRODE BIAS:
50%: Acts as a toggle to reduce bias voltage by 50%. Switch LED illuminates to
show reduction is active.
READ: Displays the measured
electrode bias voltage.
UP / DOWN:
Increases/decreases the electrode bias voltage in three volt
increments/decrements.
POL.: Changes the polarity
of the electrode bias voltage.
BIAS:
Selects either the internal or external chamber bias voltage.
RS-232 DIP Switch: Sets the
Model 530 communication parameters.
CALIBRATION SELECT: Used to
select one of eight calibration factors for use in the EXPOSURE and RATE modes.
Exposure and Rate Limits:
Charge - .0001 nC - 19999 nC
Current - 00.01 pA - 199.99 nA
Exposure (Exp.) and
exposure rate ranges for chamber sensitivity ranges
|
Chamber
Sensitivity |
Exposure |
Exposure Rate Range |
|
Range ( R/nC ) |
|
|
|
|
||
|
1.000 x
10 -3 - 9.999 x 10 -3 |
0.001 mR
- * |
00.01 mR
/ min - ** |
|
1.000 x
10 -2 - 9.999 x 10 -2 |
00.01 mR
- * |
.0001 R /
min - ** |
|
1.000 x 10 -1 - 9.999 x 10 -1 |
.0001 R - * |
0.001 R / min - ** |
|
1.000 x 10 0 - 9.999 x 10 0 |
0.001 R - 19999 R |
00.01 R / min - ** |
|
1.000 x 10 +1 - 9.999 x 10 +1 |
00.01 R - 19999 R |
000.1 R / min - 19999 R / min |
* limited by exposure
equivalent to charge limit of approximately 38000 nC
** limited by exposure rate equivalent to current limit of approximately 200 nA
Dose and dose rate ranges
for chamber sensitivity ranges
|
Chamber
Sensitivity) |
Dose
Range |
Dose Rate
range |
|
Range (
Gy/nC) |
|
|
|
|
||
|
1.000 x
10 -5 - 9.999 x 10 -5 |
0.0001
mGy - * |
0.0001
mGy / min ** |
|
1.000 x
10 -4 - 9.999 x 10 -4 |
0.0001
mGy - * |
0.001 mGy
/ min - ** |
|
1.000 x
10 -3 - 9.999 x 10 -3 |
0.001 mGy
- * |
00.01 mGy
/ min - ** |
|
1.000 x
10 -2 - 9.999 x 10 -2 |
00.01 mGy
- * |
0.0001 Gy
/ min - ** |
|
1.000 x
10 -1 - 9.999 x 10 -1 |
0.0001 Gy
- * |
0.001 Gy
/ min - ** |
* limited by exposure
equivalent to charge limit of approximately 38000 nC
** limited by exposure rate equivalent to current limit of approximately 200 nA
The following table and
graphs illustrate the maximum exposure and rate versus the chamber sensitivity.
|
Sensitivity |
Maximum |
Maximum
Rate |
|
|
Exposure (R) |
(R/min) |
|
|
||
|
1.00 x 10 -3 |
38 |
12 |
|
1.00 x 10 -2 |
380 |
120 |
|
1.00 x 10 -1 |
3800 |
1200 |
|
1.00 x 10 0 |
19999 |
12000 |
|
1.00 x 10 +1 |
19999 |
19999 |
|
1.00 x 10 +2 |
19999 |
19999 |
The following table and
graphs illustrate the maximum dose and rate versus the chamber sensitivity.
|
Sensitivity |
Maximum |
Maximum
Rate |
|
|
Dose (Gy) |
(Gy/min) |
|
|
||
|
1.00 x 10 -5 |
0.38 |
0.12 |
|
1.00 x 10 -4 |
3.80 |
1.20 |
|
1.00 x 10 -3 |
38 |
12 |
|
1.00 x 10 -2 |
380 |
120 |
|
1.00 x 10 -1 |
3800 |
1200 |
|
1.00 x 10 0 |
19999 |
12000 |