Ariens Path-Pro 136E User Manual Page 7
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The Series 920 is a
PID
controller. You may input two complete sets of
PID
parameters
on
the front panel for heat/cool applications. This includes rate,
reset, proportional band and cycle time. By setting the proportional band(s) to
zero, the Series 920 becomes a simple
ON/OFFcontrol
with a
3°F
or
1.7°C
switching differential.
The 920s auxiliary outputs may be alarms or events. An event is an ON/OFF
auxiliary output relay signal. You can use events, based on time, temperature,
or other process variables, to trigger peripheral equipment or processes.
Operator-friendly features include automatic entry codes or “prompts” to aid in
setup. When there’s a power outage, the Watlow Series 920 stores all informa-
tion in a non-volatile memory.
When you first apply power, the unit will “come up” with default values for set
points, alarm points and control
parameter.
These default values provide
minimum operating information for the control until you program in the desired
data. The default values are listed in the Master Step Menus and Charts,
pp.
41-50.
Remove the Series 920 carefully from its shipping container. Be sure to set
this literature aside where it will not be discarded.
Packing List
Included with your Watlow Series 920 are two mounting brackets with integral
screws, and this manual.
If your unit has communications, the “How to Use
Data Communications with the Watlow Series 922” manual is also included.
Put Your Control to Work-Three Steps
Once your control is installed and wired, getting the Series 920 “up and run-
ning” is a three-part process:
l
First, match the control’s “personality”, to your system in what we call the
SETUP menu; input type, units of measure, range, calibration offset, output
action, alarm type, lock-out.
l
Second, tune the control making final
PID
entries.
l
Third, enter up to ten separate profiles in the PROGRAM menu.
WATLOW Series 920 User’s Manual
7
- Series 920 1
- Safety Information 2
- Your Program 3
- Contents 4
- Figures, Tables and Charts 5
- Chapter 1 6
- Starting out with the 6
- Watlow Series 920: 6
- Packing List 7
- How to Open the 920 8
- How to Set the DIP Switches 8
- User’s Manual 9
- Operating 10
- Chapter 11
- Keyboard Area 13
- Where To Go From Here 13
- A Brief Overview 14
- Enter Real Time of Day 14
- Before Entering Your Program 15
- Programming. File 1 15
- Step 4 must be 16
- Editing Your Program 17
- Adding an AUTOSTART Step Type 17
- Running Your Series 920 19
- Chapter 4 20
- How to Check for Ground Loops 22
- Noise Suppression Devices 22
- Available from Watlow 22
- C.M.Line Filter 23
- Installation Information 24
- Installation Procedure 24
- How to Wire the Series 920 25
- Power Wiring 26
- T.C. Compensation 27
- Load from 30
- Temperature Conrol 32
- How to Tune the Series 920 33
- Series 920 User’s 34
- Chapter 6 36
- How To Program The Series 920 36
- Event Outputs 37
- Guaranteed Soak 37
- The Four 38
- JUMPLOOP 38
- Rules to Follow 39
- SYSTEM Menu 40
- .:.:.:.: 41
- SETUP Menu 42
- Represents the 45
- PROGRAM Menu 49
- StepType 50
- To Program 52
- 920, Chapter 6 52
- Chart I- Master Step Chart 53
- Chapter 7 54
- Alarm Types 55
- The Operating Band 56
- Alarm Limits 57
- Clearing An Alarm Message 58
- An Alarm And The State 58
- The Alarm Relay 58
- Appendix 59
- Series 920 Specifications 59
- 920 User’s Manual 60
- 61
- Type J, K, or T 62
- Reference Compen 62
- Equipment Required 63
- Setup and Calibration 63
- @)(sJ(g; 64
- Glossary 67
- Accepts the sensor input and 68
- Isolation: 70
- ON/OFF control: 71
- WATLOW Series 920 73
- Manual 73
- Thermal System: 74
- Safety Information, 2 76
- Warranty Information 77
- Returning Merchandise 77
- Shipping Claims 77
- Series 920 Error Codes/Alarms 78
- Clearing an Error Code 79
- How to Clear an Alarm Code 79
- Series 920 Quick 80
- Reference 80
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