nvent 910 Series Installation, Operating And Maintenance Instructions page 30

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Purpose: This parameter specifies the lead resistance of a 2 wire Nickel Iron RTD connected to
the HTC's TS 1 input.
Range: 0 to 20.00 Ω
Procedure: Measure the resistance of one of the Nickel Iron RTD leads (from the RTD to the
HTC's TS 1 input) and use this value as the TS 1 LEAD RESISTANCE.
5.2.14 TS 1 HIGH LIMIT CUTOUT
Purpose: When enabled, the TS 1 high limit cutout feature will override the CONTROL
SETPOINT temperature and force the controller output off if the TS 1 reading exceeds the
HIGH TS 1 ALARM temperature setting. This is a non-latching condition, so once the TS 1
reading drops below the HIGH TS 1 ALARM temperature setting, the controller will resume
normal operation.
Setting: ENABLE or DISABLE
Procedure: Enable or disable the cutout feature as desired.
IMPORTANT:
• The TS 1 HIGH LIMIT CUTOUT feature overrides an autocycle test. A pending autocycle
will be initiated immediately after the TS 1 temperature drops below the HIGH TS 1 ALARM
temperature setting.
• If a TS 1 failure occurs and the TS 1 HIGH LIMIT CUTOUT feature is enabled, the switch output
will latch off regardless of the TS CONTROL MODE setting or the TS FAIL MODE setting.
• If the TS 1 HIGH LIMIT CUTOUT feature is enabled, then the HIGH TS 1 ALARM temperature
setting can be set, regardless of whether the HIGH TS 1 ALARM is enabled.
5.2.15 TS 2 TYPE
Purpose: This parameter specifies the type of RTD that is connected to the HTC's TS 2 input.
Setting: 3 wire 100 Ω Platinum or 2 (or 3) wire 100 Ω Nickel Iron (NI-FE).
Procedure: Select the type of RTD that is connected to the TS 2 input.
IMPORTANT: If a 2 wire 100 Ω Nickel Iron (NI-FE) RTD is selected then the TS 2 LEAD
RESISTANCE must be entered (see Section 5.2.16).
5.2.16 TS 2 LEAD RESISTANCE
(For NI-FE RTDs only.)
Purpose: This parameter specifies the lead resistance of a 2 wire Nickel Iron RTD connected to
the HTC's TS 2 input.
Range: 0 to 20.00 Ω
Procedure: Measure the resistance of one of the Nickel Iron RTD leads (from the RTD to the
HTC's TS 2 input) and use this value as the TS 2 LEAD RESISTANCE.
5.2.17 TS 2 HIGH LIMIT CUTOUT
Purpose: When enabled, the TS 2 high limit cutout feature will override the CONTROL
SETPOINT temperature and force the controller output off if the TS 2 reading exceeds the
HIGH TS 2 ALARM temperature setting. This is a non-latching condition, so once the TS 2
reading drops below the HIGH TS 2 ALARM temperature setting, the controller will resume
normal operation.
Setting: ENABLE or DISABLE
Procedure: Enable or disable the cutout feature as desired.
IMPORTANT:
• The TS 2 HIGH LIMIT CUTOUT feature overrides an autocycle test. A pending autocycle
will be initiated immediately after the TS 2 temperature drops below the HIGH TS 2 ALARM
temperature setting.
• If a TS 2 failure occurs and the TS 2 HIGH LIMIT CUTOUT feature is enabled, the switch output
will latch off regardless of the TS CONTROL MODE setting or the TS FAIL MODE setting.
• If the TS 2 HIGH LIMIT CUTOUT feature is enabled, then the HIGH TS 2 ALARM temperature
setting can be set, regardless of whether the HIGH TS 2 ALARM is enabled.