Vaisala DMT340 - Manual (Page 136)

User's Guide _______________________________________________________________________
134 __________________________________________________________________ M210704EN-G
RSEL
Use the serial line to select the quantity, setpoints and hysteresis or
enable/disable the relay outputs. Enter the RSEL command.
RSEL [q1 q2 q3 q4]
where
q1 = Quantity for the relay 1 or Fault/Online
q2 = Quantity for the relay 2 or Fault/Online
q3 = Quantity for the relay 3 or Fault/Online
q4 = Quantity for the relay 4 or Fault/Online
Factory setting: All relays disabled. Use the quantity abbreviations
presented above. See Table 2 on page 18 and Table 3 on page 18.
Example of window limit switch (upper and lower setpoints for control
parameter): Selecting relay 1 to follow dewpoint/frost point temperature
measurement and relay 2 to follow temperature measurement. Two relay
setpoints are set for both relays.
>rsel tdf t
Rel1 Tdf above: - ? -10
Rel1 Tdf below: - ? -30
Rel1 Tdf hyst : 0.00 'C ? 5
Rel1 Tdf enabl: OFF ? on
Rel2 T above: - ? 30
Rel2 T below: - ? 20
Rel2 T hyst : 0.00 'C ? 1
Rel2 T enabl: OFF ? on
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Example of normal limit switch (one setpoint for relay
activation/deactivation): Selecting relay 1 to follow relative humidity,
relay 2 to follow temperature, relay 3 to follow dewpoint, and relay 4 to
follow dewpoint. One setpoint is chosen for all the outputs.
>rsel rh t td td
Rel1 RH above: 60.00 %RH ? 70
Rel1 RH below: 70.00 %RH ? -
Rel1 RH hyst : 2.00 %RH ? 2
Rel1 RH enabl: ON ? on
Rel2 T above: 50.00 'C ? 60
Rel2 T below: 40.00 'C ? -
Rel2 T hyst : 2.00 'C ? 2
Rel2 T enabl: ON ? on
Rel3 Td above: 5.00 'C ? 10
Rel3 Td below: 0.00 'C ? -
Rel3 Td hyst : 1.00 'C ? 1
Rel3 Td enabl: OFF ? on
Rel4 Td above: 0.00 'C ? 20
Rel4 Td below: 0.00 'C ? -
Rel4 Td hyst : 0.00 'C ? 2
Rel4 Td enabl: OFF ? on
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