Sage SIE Series, Руководство по эксплуатации и инструкция

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S A G E M E T E R I N G , I N C .
O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l
42
REV. 03-SIE/SRE
Sensor Functionality and Zero Calibration Self Check
USE KEYPAD
1
The SIE and SRE Series Keypad can be used to access
the raw calibration milliwatts (mw) as an important
diagnostic procedure. At any time, you can check
this reading at a “no flow” condition and compare
the reading to the original re ported “zero flow” value
noted on the last few lines of your meter’s Certificate
of Conformance or the flow meter's data tag. This
diagnostic procedure not only checks the sensor per-
formance and the “live zero” calibration point, but it
also verifies that the sensor is clean. It essentially
provides a means to validate that the meter is operat-
ing properly, verifies that there is no shift or drift,
and eliminates the need for annual factory calibra-
tions. This simple field diagnostic procedure also ver-
ifies that the sensor is free from contamination, even
without inspection.
1. Verify that meter has no gas flow
2
Close appropriate valves in the process to have a
“no flow” condition so you can check the “live
zero” mw output of the actual gas (it should be
checked at the same pressure as noted on
Certificate of Conformance).
If it is not possible to close valves in the
process (e.g. natural gas supply must be kept flow-
ing), a user with a Sage SVA05 or SVA07 Isolation
Valve Assembly can check “zero” of the actual gas
and pressure without shutting off the gas supply.
Refer to SVA SERIES ISOLATION VALVE ASSEMBLY
DETAILS ON PAGE 35.
a) Loosen Lower Collar Clamp completely
b) Slightly loosen compression fitting until Probe
can be lifted
c) Lift Probe until Safety Chain is taut
d) Tighten compression fitting
e) Close Valve
f) Check zero mw as per “2” below
Optionally, do an ambient air check by re -
moving probe and covering up sensor by capping
the sensor with a plastic bag, empty plastic water
bottle or other means of preventing flow (see 8).
2. Assumes you are already in the correct channel.
(See example 9, on page 54 if you have a
Multiple Channel meter.)
3. Verify that meter is in Flow Mode.
4. If not, refer to Example 2 on page 52.
5. After removing enclosure cover, press Flow/Shift
five times (brings up Analysis Menu).
6. Press Forward/Up twice (brings up RTD Power).
7. Press Select/Set once.
8. You are now observing the raw milliwatts (mw)
coming off the sensor circuit. Check the
observed reading (after a few minutes of
“no flow” stabilization), against the last line(s)
of your Meter’s Certificate of Conformance.
9. A value within 5 milliwatts of the original
Factory value (assuming the same gas is checked
at same pressure) indicates that the meter is still
in calibration.
10. A value greater than 5 milliwatts, but less than
or equal to 10 milliwatts, also indicates that the
meter is still in calibration, but this reading may
have been influenced by one or more of the fol-