HT instruments HT950N - Manual (Page 12)

HT950N
EN - 12
5.4. SETUP OF ALARM THRESHOLDS
On HT950N meter it’s possible to set up to four alarm thresholds with values within all
measure range. The sequence of programmable parameters presented cyclically by meter
is the following:
T2  T1  UF  UA
Parameters setup is possible using PARA and arrows keys [], [], [] with the
following procedure:
1. Power on HT950N meter.
2. Press PARA key. On PARA display appear “t2” message and on SET display is shown
the last programmed T2 value.
3. Press [] key to move cursor on units, tenths or hundreds values on SET display.
4. Press [] key to increase the parameter value variable from 0 to 9 as for units as for
tenths and from 0 to 1 for hundreds.
5. Press [] key to decrease the parameter value up to 0, minimum value for units,
tenths and hundreds.
6. Press ENT. key to confirm T2 value. HT950N automatically present the following “t1”
parameter.
7. Repeat the previous steps from 1 to 6 for fix the threshold values of T1, UF and UA
parameters.
8. Press ENT. key to exit from last item C_End and return on normal measurement.
WARNING
 Range of possible values for T2, T1, UF, UA parameters is from 0°C to
199°C.
 The set values of parameters are maintained on memory meter also
when instrument power off.
 HT950N don’t execute any measure and don’t show any value at
principal display during temperature threshold setup.

For >200°C temperature measure the meter always show the “200”
value on principal display. For temperature value > 230°C on principal
display is shown the “- - -“ message of disabled probes and T1 relay
open the circuit.