Endress+Hauser SS1000, Hardware Installation And Maintenance Manual

Page: 112 / 121

2-Pack Analyzer System
B
–
28 4900002256 rev. B 4-13-21
Table B-1 Potential analyzer issues and solutions (Continued)
Symptom Response
Front panel display is not lit and no
characters appear (Continued)
Check connections on the display
communication and power cables.
Strange characters appear on front panel
display
Check connections on the display
communication cable.
Pressing keys on front panel do not have
specified effect
Check connections on the keypad
cable.
System stuck in Fit Delta Exceeds Limit
for greater than 30 minutes
Refer to “Service Contact” on page
B-31 for service information.
Not getting enough flow to the sample cell Check both the micro filter and
membrane separator for
contamination. Replace if necessary.
Check if supply pressure is sufficient.
No reading on device connected to
current loop
Make sure that the connected device
can accept a 4-20 mA signal. The
analyzer is set to source current.
Make sure the device is connected to
the correct terminals (see Table 3–1 on
page 3–14 or Table 3–2 on page 3–16).
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.
Check the open circuit voltage (35 to
40 VDC) across the current loops
terminals (see Table 3–1 on page 3–14
or Table 3–2 on page 3–16).
Current loop is stuck at 4 mA or 20 mA Check display for an error message. If
alarm has been triggered, reset the
alarm.
On the current loop board, check the
voltage between the end of resistor R1
closest to the jumper and ground. If
the concentration reading is high, the
voltage should be near 1 VDC. If the
concentration reading is low, the
voltage should be near 4.7 VDC. If not,
the problem is probably on the ARM9
main board. Refer to “Service repair
order” on page B-32 to return to the
factory for service.