If a sash position sensor was NOT included with the HMS-1655L, then
the following section may be omitted.
Calibrating the Sash Position Sensor
Calibrating the sash position sensor once it has been installed at the
fume hood being monitored and/or controlled may be accomplished
using the
Sash Setup Position
option on the
Unit Setup
menu which
brings up the
Field Calibration
screen. Position the sash at the
minimum position and enter the actual measured height using the
slider. If the sash is closed completely, enter zero as the minimum
sash height. Tap the
Next
button to advance to the next step in the
calibration procedure. Set the sash to the maximum position and enter
the actual measured height using the slider at the calibration screen,
and tap the
OK
button to save the new calibration.
The next step is to configure the analog output that controls the
exhaust damper actuator of the monitored fume hood, if control is
required. If the specific application only requires monitoring, then the
next step may be omitted.
Setting Up the Analog Output
For those applications requiring control of an exhaust damper actuator,
the analog output must be configured accordingly. To access the analog
output configuration option, select the
Unit Setup
option from the
Main
Setup
menu, and then select the
Controller Setup
option.
At the first configuration screen, the user is prompted to select an
action mode (direct or reverse action), and the output range (0-5/0-10)
or (1-5/2-10V). The second screen allows the span of the output to
be limited to a percentage of the selected range. These settings only
relate to A0-1.
Once the operating mode and range are selected, the user is
prompted to specify the upper and lower limits of the analog output as
percentages. Most applications will use the default settings of zero and
100 percent. But for those applications where the top or bottom limits
need to be tweaked, these settings may be adjusted accordingly to
further limit the range of the actual analog output signal.
Setting Alarm Limits
To determine the limits at which the unit status changes from
Normal
to
Warning
, and from
Warning
to
Alarm
, the alarm limits must be
configured. To configure the alarm limits for the HMS-1655L Fume
Hood Controller, select the
Alarm Limits
option from the
Controller
Setup
menu. The high and low alarm limits, as well as the high and
low warning limits, for both occupied and unoccupied operating modes
may be specified in sequence. These limits should be specified to set
the face velocity range which should be considered
Normal
, as well as
the range which indicates a
Warning
condition, and the range which is
considered critical and indicates an
Alarm
condition.
Changing the Operating Mode
The HMS-1655L Fume Hood Controller can be set for
Occupied
,
Unoccupied
, or
Disabled
modes of operation. To change the operating
mode, select the
Unit Setup
option from the
Main Setup
menu, and
then select the
Hood Setup
option. At the
Hood Setup
menu, select
the
Operating Mode
option which allows the user to select one of
three operating modes. Changing the mode of operation automatically
selects the pre-programmed setpoint and analog output action mode
associated with each mode.
Adding Password Security
The HMS-1655L menu system can be protected by adding up to 10
multi-level passwords to the system. The
Password Setup
option on the
System Setup
menu allows the user to manage the security passwords.
Options on the
Password Setup
menu include those for adding, editing,
and deleting entries from the system as shown in Figure 7.
There is also an option that allows all of the system password entries
to be purged. To add a new password entry, select the
Add Password
option from the
Password Setup
menu, which prompts the user to
enter a minimum of four and up to eight digits. Once a valid password
has been specified, the user is prompted to specify one of four access
levels:
Unrestricted
,
Standard
,
Basic
, or
Restricted
.
All password entries are saved to non-volatile memory. In the event
that a password has been forgotten, there is a factory-default password
that will provide unrestricted access to the user menu system. Please
consult the factory for more information regarding this password. The
first password entry is automatically saved as unrestricted.
QUICK START GUIDE
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29
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Triatek reserves the right to change product specifications without notice.
HMS-1655L
HMS-1655L Quick Start Guide
Triatek reserves the right to change product specifications without notice.
MOUNTING/WIRING
