DayTronic 3500 Series, Instruction Manual

Page: 53 / 122

As explained below, when you define each limit value, you will indicate whether
you want the limit to be LATCHING or NONLATCHING. You will also be able to
specify a HYSTERESIS "WINDOW" for any NONLATCHING limit.
a. Once you are in SETUP MODE, press the button labelled
The unit will display "HIL" (for "HIGH LIMIT"):
b. To display the unit's current HIGH LIMIT value, press
If you don't want to display the "HIL" value, press LIMIT again and proceed to
Step e.
c. To change the HIGH LIMIT, use the NUMERIC BUTTONS as explained in Sec-
tion 1.e to modify the displayed number. NOTE: You cannot change the preci-
sion (i.e., decimal-point location) of either limit value. This precision is
automatically set to match that of the SCALING FACTOR ("m" coefficient) that
currently applies to the data reading (see Section 4). Note too that you can-
not set a HIGH LIMIT that is lower than the existing LOW LIMIT—although the
two values may be equal—nor can either value exceed the unit's inherent
count range of ±32700.
d. When the desired HIGH LIMIT value appears, press ENTER to return to the
"HIL" display . Then press LIMIT again. The unit will display "HIHYS" (for "HIGH
HYSTERESIS"):
e. To display the current HIGH HYSTERESIS percentage, press ENTER . If you
don't want to display the HIGH HYSTERESIS, press LIMIT again and proceed
to Step h.
f. The number shown for the HIGH HYSTERESIS parameter is the percentage of
the current SCALING FACTOR ("m" coefficient) which, when subtracted from
the HIGH LIMIT value, determines the lower threshold of the HIGH HYSTERE-
SIS WINDOW. The window extends upwards (in the positive direction) from
this threshold to the HIGH LIMIT value itself, as illustrated in Fig. 19. For front-
panel display of the current "m" value, see Section 4.a.4.
3.15
S
ETUP
: I
NSTRUMENT
C
ONFIGURATION
3
3.a C
ONFIGURING
T
HROUGH THE
F
RONT
P
ANEL
HI
OK
LO
Greater Than Zone
HIL
LOL
Between ("OK") Zone
Less Than Zone Fig. 18 Limit Zones
ENTER
LIMIT