Symptoms / Alarms Alarm codes Cause Remedy
Displayed flow rate appears
to be frozen, or display con‐
tinuously reads "wait for the
sensor connect" after power
cycle.
150: Sensor signal disrup‐
ted
Broken or disconnected inter‐
nal SSL cable between barri‐
er module and DSL frontend
module.
1. Check SSL cable
connections.
2. Verify that barrier module
is fully plugged into
backplane.
Barrier module may be defec‐
tive
Contact Technical Support
DSL frontend module may be
defective
9.3 Using a pipe simulator test block (A1)
Introduction
In cases where users desire or require the need to verify proper operation of the flow system,
Siemens offers test blocks to allow bench testing the transmitter, sensors and cables. If the
system operates properly using the test block, then focus on application conditions as the
source of the problem. Size A and B universal sensors use the 7ME39600TB10 Test Block and
Size C and D universal sensors use the 7ME39600TB20 Test Block.
Note
Test blocks do not support the FSS200 High Precision sensors.
Installation on test blocks
The test blocks provide two test surfaces. Each surface supports a specific sensor size. For
example, one surface of the 7ME39600TB10 Test Block supports Size "A" Sensors and the
other supports Size "B" Sensors.
The Test Blocks include two labels, one on each side-plate. The labels identify the sensor size,
data to be entered, and the surface to be used with the specific sensor size. See illustration
below.
Diagnostics and troubleshooting
9.3 Using a pipe simulator test block (A1)
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD 93
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