HYDROSENSE HS2410
Revision 5.0
P a g e 17 | 27
5.0 CONTROL
SETUP
(<CONTROL>
K
EY
)
To access the control setup settings, you will require a password. The password is “2000”.
5.1
RELAY SETTINGS <1>
Four relay alarm points are available for remote alarm. Of these, two are general-purpose alarm relays
with user settable alarm points, dead band (differential alarm points), and time delay. The remaining
two relays are to indicate Maintenace alarm (R3) and lamp failure (R4).
If the general-purpose alarm relays are to be used, press
<CONTROL>
, then press
<1>
for Relay
Settings Menu.
5.1.1 SETPOINTS
Press <1> for setpoints. Enter the value in PPM for relay R1 to activate. Press <ENTER>. Now enter
the value for the relay R1 to de-activate and press <ENTER>. A small differential between Relay HI and
Relay LO may be desired to eliminate relay chatter if the PPM concentration is fluctuating at the alarm
level. Similarly, enter the high and low alarm points for the second relay R2 if it is to be used. Note: for
a single point alarm with no differential, enter the LO alarm value identical to the HI alarm value.
5.1.2 RELAY TIME DELAY
To delay the relay alarm for a preset time (in seconds), press <2> for Enter On delay in the Relay
Setting Menu. This will suppress the alarm to eliminate a spurious momentary alarm that may be
caused by an oil globule or process variable not indicative of an alarm condition.
5.1.3 RELAY ENABLE / DISABLE
The relays may be disabled from operating for maintenance purposes. Confirm the relays are activated
in the lower right corner of the display in the RELAY SETTINGS menu. If the display reads ON (in the
lower right corner), the relays are activated. Press <3> to enable the relays or press <4> to disable the
relays.
The control functions are now entered. Press <CALIB> to calibrate or <DISPLAY> to return to the main
display.
5.2
OPERATING RANGE - mA OUTPUT SETTINGS
Determine the desired operating range of the instrument. This will reflect the 0 to 100% OUTPUT
display on the main menu, and the 4 to 20 mA output range of the instrument. For example, if the
operating range of the process is 0 to 30 PPM, a range of 0 to 50 PPM may be desirable. The display
will show 0-50 PPM equal to 0-100%. The control signal of 4-20 mA will represent 0-50 PPM. Press
<CONTROL>
on the keypad, enter the password at the prompt, then press
<2>
for 4-20 mA Settings.
The display will prompt you to enter the zero point in PPM. This will typically be
0.0
. Enter the value
and press
<ENTER>
. The display will prompt you to enter the span value (i.e., 50.0). Key in the
desired value and press
<ENTER>
.
5.2.1 Confirm 4-20 mA OUTPUT direction
The display will require a confirmation if the 4-20 mA signal is to be direct acting (4-20 mA = 0-100%),
or if inverse acting is required (20-4 mA = 0-100%). The lower left display will read mA: DIR. If this is
required, press
<ENTER>
. If inverse is required, press
<1>
.
