www.delta-controls.com
IOM-GR-A : AUGUST 2016
Compound range eg –12.5 to +12.5 mbar
(Models GR3, GR6 - range BC)
For normal operation, negative pressure may be
applied to the LP port, whereby the HP port is left
open to atmosphere and the set point is between 0
and +12.5 mbar.
For reverse operation, negative pressure may be
applied to the HP port, whereby the LP port is left
open to atmosphere and the set point is between 0
and –12.5 mbar.
For positive pressures, the opposite applies.
It is recommended that the minimum setting is to be
not less than 5% of FS either side approaching zero.
MAINTENANCE
Inspections should be carried out at quarterly to
yearly
intervals
depending
upon
operating
conditions.
Where a terminal enclosure is fitted, isolate the unit
from process and power and remove the lid. Check
all terminals for tightness. Check that cable tails are
not fouled or chafed. Check for internal
condensation. Rectify as necessary.
It is recommended that instruments used to provide
an alarm are operated periodically to ensure they
are functioning correctly.
If further maintenance is required, seek advice from
DELTA CONTROLS before attempting repair or
replacement of parts.
Should the diaphragm fail the process will vent to
atmosphere via a control orifice without pressurising
the switch enclosure. Periodically ensure the vent
area does not become blocked and vent plug has
not degraded. Ensure that the vent area is not
obstructed.
THE
EQUIPMENT
CONTAINS
NO
USERREPLACEABLE PARTS AND IS NOT
INTENDED TO BE REPAIRED BY THE
USER. REPAIR OF THE EQUIPMENT IS
TO
BE
CARRIED
OUT
BY
THE
MANUFACTURER, OR THEIR APPROVED
AGENTS, IN ACCORDANCE WITH THE
APPLICABLE CODE OF PRACTICE.
ELECTRICAL
ISOLATION—THESE
PRODUCTS ARE NOT SUITABLE FOR
ELECTRICAL
ISOLATION.
ALWAYS
ISOLATE CIRCUIT TO CARRY OUT ANY
ELECTRICAL WORK.
REPLACEMENT PARTS:
Use only factory authorised parts and the fitting
instructions that are supplied.
