Honeywell Searchpoint Optima Plus - 9.5 Test 4-20 mA Loop Integrity

MAN0905_Issue 7_07/17 Searchpoint Optima Plus with optional HART
®
output
Operating Instructions
2108M0550
41
9.5 Test 4-20 mA Loop Integrity
It is recommended that the 4-20 mA loop integrity is tested by setting the Searchpoint Optima Plus to
outputanoverrangecurrent.Thiswillconrmthattherearenofaultsinthesystemthatwouldcausea
current limit.
Note:Thisfunctionwilltimeoutafter10minutesofinactivity.
Note:Whenconnectingordisconnectingamultimeter,powerofftheSearchpointOptimaPlus,otherwise
the unit will indicate a latched warning that the 4-20 mA loop was broken. If this occurs it can be cleared
usingtheSHC1HandheldInterrogator.SeeClearFaultsorWarnings.
1. Select Calibrate then Force 4-20.
2. Use
and to set the mA value to 21 mA and press Enter.
Searchpoint Optima Plus will now output 21 mA.
3. Check that the signal at the controller is > 20 mA, then press Enter.
4. Press Enter to release the 4-20 mA output signal.
5. Press Escape to return to the main menu.
Note:Ifthecurrentatthecontrollerisnotcorrect,checkthe4-20mAloopconnectionsandcabling,and
check that the loop resistance is less than 600 Ω.Incurrentsourcemode,forsupplyvoltagesof18to
20 Vdc the maximum loop resistance is 500 Ω.
9. Commissioning using SHC1
Handheld Interrogator