4
Overview
WARNING:
BEFORE OPENING THE VALVE, MAKE SURE THE TRANSMITTER IS LOCKED.
BE SURE THE VALVE IS CLOSED WHEN HE TRANSMITTER IS RETRACTED FROM VALVE.
THIS IS EXTREMELY IMPORTANT OTHERWISE THE TRANSMITTER WILL PUSH OUT OF THE PROCESS.
Installing Transmitter 2000-RANGE-VALVE
The position of the valve depends on the welding position of the weld-on nipple. Before welding, locate weld-on nipple so that the
valve is in the right position.
* DO NOT DAMAGE THE THREAD.*
Mounting Position
When the transmitter is mounted horizontally, the cable gland MUST be pointed downwards.
Mounting Position Effect
All transmitters are calibrated in vertical position.
If the transmitter is mounted in a different position, there will be a little zero shift.
If the transmitter is mounted up, there is a zero shift (e.g. 4,03 mA instead of 4mA). If the transmitter is mounted down, there is a zero
shift (e.g. 3.97 mA instead of 4mA).
After installation of the transmitter the zero must be set to 4.00 mA with “P103” in the programming mode. This will not
affect the span.
Calibration
All transmitters are fully calibrated at the factory, to the conditions stipulated in users order. When the buyer has not requested
calibration, the transmitter will be calibrated at the highest span. It is advised to re-calibrate the transmitter after shipment.
Under the cover (3) you will find the terminal board.
The push buttons “Zero”, “Span” and “Prog” are under the other
cover (1).
External loads must be placed in the negative leg of the 2-wire
loop.
The figure left shows the wiring connection of the transmitter. The
2-wires must be connected to 3(-) and 4 (+) of the terminal board.
The signal wiring must be shielded and twisted pairs yield best
results. Do NOT run signal wiring in open trays with power wiring,
or near “heavy” electrical equipment (E.g.: Frequency controller or
heavy pumps).
Shielding must always be connected at the side of the power
supply. In case the mounting position is already connected
to earth (e.g. via the tank or pipe line)
DO NOT
connect the
instrument to earth.
Please ensure that the instrument is not
connected to earth twice to prevent the occurrence of an
‘earth loop’
. In applications with synthetic mounting positions the
case ground terminal (internal or external) must be connected to
earth.
SERIES 2000-RANGE-VALVE