KMS-2/Exia Transmitter
Installation and Operating Manual
ATEX
Rev D 20/09/2018 KMS-2/Exia IOM Page 9 of 13
Caution
The float failure and write protect switches should be set to the ‘OFF’ position before
adjustment to the ranging are made, and reinstated as necessary afterwards.
It is important that the float is kept stationary for approximately 10 seconds before and
after operation of the calibration buttons to ensure that the output signal has stabilised to
the correct value.
Fault signalling Current
(Rev 5 Onwards)
When the magnetic field from the float is not detected the default output level is set Upscale (22mA).
To change to Downscale (3.5mA)
1. Press and release the span & zero buttons
2. Setting is indicated on LCD display and or respective LED
3. To change, press and release respective button
a) Zero button (Downscale 3.5mA)*
b) Span button (Upscale 22mA)*
4. Relevant LED will flash to signify save to memory
5. When complete display will revert to normal measurement mode.
*If change not required wait 20 Seconds unit will return to “Measurement Mode”
Low level alarm
The Low Level alarm output signal will change the output to 3.8mA if the float drops more than 13mm
below zero point. When off the output will remain at 4mA below the zero point until the return signal is lost
i.e. the sensor is no longer sensing the magnetic field then output will change to either 3.5mA (Downscale
or 22mA (Upscale).
1) Write Protect
On: Range setting inhibited
Off
2) Alarm Function
On: Low Level (3.8mA)
Off: No Alarm Output Remains at 4mA
Fig. 6
Configuration switches
Caution
Turn power off before changing alarm switch settings to prevent unexpected changes in
loop current. Ensure that the write protect is set to ‘ON’ after changes to range
adjustments.
Fixed Output
To allow for loop calibration the transmitter output can be fixed to either 4 or 20mA. The zero or span
button should be depressed until the respective LED lights, the output will then remain static. To reset to
normal operation either depress the opposite button or cycle the power.
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