SS2100r H
2
S Analyzer
B–10 4900002189 rev. D 3-7-18
Table B-1 Potential instrument problems and their solutions (Continued)
Symptom Response
No reading on device connected to
current loop (Continued)
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.
Current loop is stuck at 4 mA or 20 mA Check display for error message. If
alarm has been triggered, reset the
alarm. Refer to the Firmware Manual
for instruction.
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 volt-
age should be near 4.7 VDC. If not, the
problem is probably on the ARM9 main
board. Return to factory for service.
Reading seems to always be high by a
fixed amount
Capture diagnostic data and send the
file to SpectraSensors (see “To read
diagnostic data with HyperTermi-
nal” in the Firmware Manual).
Reading seems to always be high by a
fixed percentage
Capture diagnostic data and send the
file to SpectraSensors (see “To read
diagnostic data with HyperTermi-
nal” in the Firmware Manual).
Reading displays 0.0 or seems relatively
low
Capture diagnostic data and send the
file to SpectraSensors (see “To read
diagnostic data with HyperTermi-
nal” in the Firmware Manual).
Check that Peak Tracking is enabled
(see “To change parameters in
Mode 2” in the Firmware Manual).
Reading is erratic or seems incorrect Check for contamination in the sample
system, especially if the readings are
much higher than expected.
Capture diagnostic data and send the
file to SpectraSensors (see “To read
diagnostic data with HyperTermi-
nal” in the Firmware Manual).
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