Endress+Hauser SS2000XP, Руководство по эксплуатации

Страница: 51 / 60

BA02183C SS500XP/SS2000XP Gas Analyzer
Hauser B
–
15
Front panel display is not lit
and no characters appear
Check for correct voltage on terminal block input.
Observe polarity on DC powered units.
Check for correct voltage after fuses.
Check for 5 VDC on red wires, 12 VDC on yellow
wires, and 24 VDC on orange wires from power
supply (black wires are ground).
Check connections on display communication and
power cables.
Strange characters appear on
front panel display
Check connections on display communication
cable.
Reading seems to always be
low by a fixed amount
Refer to the Device Parameters manual for
“Adjusting Analyzer Reading to Match Spe -
cific Standard(s)” .
Capture diagnostic data and send the file to
Hauser (refer to “To read diagnostic
data with HyperTerminal” in the Device Param -
eters manual).
No reading on device con -
nected to
current loop
Make sure that connected device can accept a
4–20 mA signal. The analyzer is set to source cur -
rent.
Make sure the device is connected to the correct
terminals on the green connector (see Figure 3–2
on page 3–7).
Check the open circuit voltage (35 to 40 VDC)
across the current loops terminals on the green
connector (see Figure 3–2 on page 3–7).
Replace the current loop device with a milliampere
meter and look for current between 4 mA and
20 mA. A voltmeter connected across a 249-ohm
resistor can be used instead of the milliampere
meter; it should read between 1 and 5 volts.
Reading seems to always be
low by a fixed percentage
Refer to the Device Parameters manual for
“Adjusting Analyzer Reading to Match Spe -
cific Standard(s)” .
Reading seems to always be
high by a fixed percentage
Refer to the Device Parameters manual for
“Adjusting Analyzer Reading to Match Spe -
cific Standard(s)” .
Capture diagnostic data and send the file to
Hauser (refer to “To read diagnostic
data with HyperTerminal” in the Device Param -
eters manual).
Table B-1 Potential instrument problems and solutions (Continued)
Symptom Response