Micropilot FMR60/62/67
Endress+Hauser 21
Test sequence B
Preparation
1. Prepare a test tank with test medium (dielectric constant comparable to that of the medium to
be measured). The tank can either be open or closed. For installation instructions, refer to the
Operating Instructions (→ 7).
2. Navigate to: Setup → Advanced setup → Deactivate SIL/WHG > Reset write protection and
enter the relevant locking code (WHG: 7450; SIL: 7452; SIL and WHG: 7454).
The SIL mode is deactivated.
3. Remove the device and mount it in a closed test tank or above an open test tank.
4. Connect suitable measuring device (recommended accuracy better than ±0.1 mA) to the
current output.
5. Perform interference echo mapping if the shape and size of the test tank is different.
6. Determine the safety setting (level limit or range monitoring).
Procedure for level limit monitoring
1. Approach a level directly below (MAX monitoring) or directly above (MIN monitoring) the
level limit to be monitored.
2. Read the output current, record it and assess for accuracy.
3. Approach the level directly above (MAX monitoring) or directly below (MIN monitoring) the
level limit to be monitored.
4. Read the output current, record it and assess for accuracy.
The test is to be considered successful if the current in step 2 does not result in activation
of the safety function but the current in step 4 does.
Procedure for range monitoring
1. Approach five levels within the range to be monitored.
2. Read the output current at each level value, record it and assess for accuracy.
The test is to be considered successful if the current values in step 2 are within the
required level of accuracy.
The proof-test is to be considered to have failed if the expected current value deviates for a
specific level by > ±2 %. For troubleshooting, refer to the Operating Instructions (→ 7). 99 %
of dangerous, undetected failures are detected using this test (Proof test coverage, PTC = 0.99).
L
CAUTION
Re-installation in the original tank
SIL mode is not activated.
‣
The SIL mode must be reactivated (→ 12) .
‣
If an interference echo mapping was performed in the test tank, it is necessary following
installation in the original tank to carry out another interference echo mapping that is valid for
that tank.
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