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2.0. TECHNICAL
SPECIFICATIONS, MODEL RS400-HTO
MEASUREMENT DISPLAY
4 1/2 digit LCD
MEASUREMENT RANGE
1 to 19,999
μ
Sv/hr
NOTE: Conversion factor according to ICRP-68 Table C1
where: 1
μ
Sv/h = 3.09E4 Bq/m
3
= 0.835
μ
Ci/m
3
SENSITIVITY
2-3
μ
Sv/hr h (2
μ
Ci/m
3
)
ACCURACY
±10%
GAMMA COMPENSATION
multiple chambers in a cruciform pattern to reduce errors due
to external gamma radiation Gamma response less than 0.2
μ
Sv/hr per mR/hr for any field direction.
RESPONSE RATE
30 seconds to reach 90% of final reading,
NOISE LEVEL
± 2
μ
Sv/hr 1 S.D. (10 second electronic time constant)
ZERO
STABILITY
±
2
μ
Sv/hr after 3 minutes (or less) warm-up
ALARM (ACOUSTIC)
1. ten position stepped attenuator set point for signal alarm
2 to 1,000
μ
Sv/hr, steady tone. OFF position included.
2. low flow produces an intermittent tone
3. Mute switch silences audible tone
ALARM (VISUAL)
LEVEL:
red LED; when tritium level exceeds set point
FLOW:
yellow flashing LED; low pump flow
LOW BAT:
red LED; D-cell batteries need to be replaced
-AND-
HVPS:
red LED illuminates to indicate a malfunction
with the high voltage power supply (HVPS)
used to bias the ionization chambers
EXTERNAL CONNECTIONS
miniature DIN plug with RS232 serial data output for tritium
measurement, and alarm status
DUST FILTERS
in line disposable cartridge, Pall P/N 12082
SAMPLING SYSTEM
6 hose barb ports are located on the
front
panel
PUMP
miniature internal pump for 3 to 5 volume changes per minute