Reference Manual
00809-0100-4731, Rev FA
April 2003
A-7
APEX
™
and APEX Sentry
™
Radar Gauge
Power Supply APEX and APEX Sentry
• 90 to 250 V ac ±10%, 50/60 Hz
or
• 18 to 36 V dc
Power Consumption
• < 8 watts
Input APEX only (Non-intrinsically safe output)
• Accepts one RTD signal (optional), as defined in the following table:
APEX Sentry (and APEX with intrinsically safe output option code 2)
• No RTD input available
Output APEX and APEX Sentry
• 4-20 mA analog signal (10.5 to 55.0 V dc powered), superimposed with a
digital HART signal
• APEX output can be configured to provide level, volume, or standard
volume
• Default analog saturation settings: minimum is 3.9 mA; maximum is 20.8
mA
• Available with optional intrinsically safe 4–20 mA output for use with
galvanically isolated barriers
CALIBRATION APEX and APEX Sentry
• Continuous frequency self-calibration ensures stated level accuracy
SOFTWARE
FUNCTIONALITY
APEX and APEX Sentry
• Gauges are capable of digital communication over the 4–20 mA output
loop without disruption using the HART Communications Protocol.
• All configuration data and programs are retained in non-volatile memory.
Upon power interruption, all data is available when power is restored.
WEIGHT APEX and APEX Sentry
• Less than 19 lb (9 kg) with an ASME B.16 (ANSI) 2-in. Class 150 (DN 50,
PN 16) flange
• Less than 23 lb (10 kg) with an ASME B.16 (ANSI) 3-in. Class 150 (DN 80,
PN 16) flange
• Less than 30 lb (14 kg) with an ASME B.16 (ANSI) 4-in. Class 150 (DN
100, PN 16) flange
Input Range Accuracy
Pt 100 3-
or 4-wire RTD
–40 to 400 °F
(–40 to 204 °C)
±1.8°F
(
±1 °C)
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