16
2 6 6 H S H MODBUS TR A N S M IT TE R |
P R E SSU R E/ T EM P ER AT U R E M U LT I VA R I A B L E | O I/ 2 6 6 H SH M T- EN R E V. A
—Unscrew the housing cover of the communication
board/LCD side.
Important. With an Ex d / Flameproof design, please refer to
the section “Securing the housing cover in flameproof areas”.
—
L1/L5 display versions can be installed in different
positions (90° rotations)
— LS display installation shall be performed carefully
plugging in sensor connections
Important. Retighten the housing cover until it is hand-tight. If
necessary, refer to the section “Securing the housing cover in
flameproof areas”.
Important. Picture shows L1/L5 display versions. LS windowed
cover is dimensionally different (short) but features the same
threads and requires the same installation practices.
Each of the front faces of the electronics housing features
a locking screw (hex-head socket screw) on the bottom
side.
— Install the housing cover to the housing by hand-
tightening it.
— Turn the locking screw counterclockwise to secure
the housing cover. This involves unscrewing the screw
until the screw head stops at the housing cover.
Figure 16: Windowed front cover and LCD display
6.11 Installing/Removing the LCD display
6.12 Securing the housing cover in flameproof areas
7 Operation
7.1 Local push buttons functionality (option R1)
266 transmitters allow local adjustments via the on-board
non intrusive push buttons, when selected. The push
buttons are located under the identification nameplate. To
gain access to the local adjustments release the fixing
screws of the nameplate and rotate clockwise the
identification plate.
Warning - Potential damage to parts. Operating the control
buttons with a magnetic screwdriver is not permitted.
1
1 - Identification
nameplate
2 - Zero pushbutton
3 - Span pushbutton
4 - Write-protection
pushbutton
4
3
2
Figure 17: Pushbutton functionalities
7.2 Factory settings
Transmitters are calibrated at the factory to full span (0 to
URL) or according to the customer’s span if specified. The
calibrated range is provided on the name plate whereas
the tag number on the additional tag plate. The calibrated
range and tag number are provided on the name plate. If
this data has not been specified, the transmitter will be
delivered with the following configuration:
Parameter
Factory setting
Lower Range Value (LRV) (4 mA) Zero
Upper Range Value (URV) (20
mA)
Upper Range Limit (URL)
Output transfer function
Linear
Damping
1 second
Transmitter failure (alarm)
Upscale (21 mA)
Optional LCD HMI scale
1 line PV and output signal
bargraph
Important. All of the configurable parameters here on the left
can easily be modified either via the optional LCD HMI, with a
HART handheld terminal or a compatible software solution.
Information regarding flange type and material, O-ring
materials, and filling liquid type is stored inside the non-
volatile memory of the device.
7.3 Configuration types
Pressure transmitters can be configured as follows:
— Configuration of the parameters for the lower and
upper range values (via Zero and Span push buttons),
without an integral LCD HMI.
— Configuration of the pressure transmitter using the
integral LCD HMI with keypad (menu-controlled).
— Configuration with a handheld terminal.
— Configuration using a PC/laptop via the graphical
user interface (DTM).
