Setup – Watlow Series 945, 1/4 DIN Microprocessor-BasedAuto-tuning Control User Manual

Page 15

Setup, Chapter 4

WATLOW Series 945 User's Manual

Setup

rSP

dEC

C _ F

Ot1

HYS1

Ot2

HYS2

Input: Selects the sensor input type. Only those input types which are compatible
with your unit will appear. See the model number information for your type.
Range: J, K (appears as H), t, n, c, r, S, b, Pt2, rtd, rt.d, 0-5, 420

Default: J or r

Remote Set Point: Enables models with process input capability to accept a remote
set point signal from another device. This parameter only appears if In = Thermo-
couple or RTD.

Range: OFF, 0-5, 420

Default: OFF

Decimal: Selects the location of the decimal point for all process related data. This
parameter only appears if the In parameter is 0-5 or 420.
Range: 0, 0.0, 0.00

Default: 0

Celsius _ Fahrenheit: Selects the units of temperature measurement. This para-
meter only appears if the In parameter is a thermocouple or RTD input. Dependent on
the dFL parameter. See Appendix II.

Range: C or F

If dFL = US: Default: C

If dFL = SI: Default: F

Range Low: Selects the low end of the set point range. See the model number and
specification information on the inside back cover, and Table 1 on Page 16 for sensor
range values. Also used to set the low end of the process or remote set point input
and/or the low end of the range for the retransmit output. 0.0VDC and 4mA represent
Range Low (rL) for process inputs and outputs. The process input and retransmit
output are linearly scaled between rL and rH.
Range: Sensor range low to rH

Default: Low limit of sensor type

Range High: Selects the high end of the set point range. See the model number and
specification information on the inside back cover, and Table 1 on Page 16 for your
sensor range values. Also used to set the high end of the process or remote set point
input and/or the high end of the range for the retransmit output. 5.0 VDC and 20mA
represent Range High (rH) for process input and output. The process input and
retransmit output are linearly scaled between rL and rH.
Range: Sensor range high to rL

Default: High limit of sensor type

Output 1: Selects the output action for the primary output. Action is in response to
the difference between set point and process variable. Select ht (heat) for reverse
acting or select CL (cool) for direct acting. Range: ht, CL Default: ht

Hysteresis 1: Selects the switching hysteresis for Output 1 when Pb1 = 0 (ON/
OFF). See Page 18 for the Pb1 parameter.
Range:

1°F - 99°F

0.1°F - 9.9°F

Default: 3°F/0.3°F

1°C - 55°C

0.1°C - 5.5°C

1 Unit - 99 Units

0.1 Units - 9.9 Units

Output 2: Selects the output action for the secondary output. Action in response to
the difference between set point and process variable. Select ht (heat) for reverse
acting or select CL (cool) for direct acting. This parameter only appears if you have a
secondary output. Range: CL, ht, no

Default: CL

Hysteresis 2: Selects the switching hysteresis for Output 2 when Pb2 = 0 (ON/OFF).
See Page 18 for the Pb2 parameter. This parameter only appears if you have a
secondary output; it will not appear if Ot2 = no.
Range: