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Watlow Controls Series 998 User Manual

Dual channel, 1/8 din, microprocessor-based temperature/process controller
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Dual Channel, 1/8 DIN, Microprocessor-Based
Temperature/Process Controller
1241 Bundy Boulevard, P.O. Box 5580, Winona, Minnesota USA 55987-5580
0600-0010-000 Rev G
February 2000
Supersedes: W998-XUMN Rev F
Series 998
User's Manual
User Levels:
• New User........................... go to Introduction
• Experienced User................... go to page 4.1
• Expert User............................. go to page 4.1
Installers:
• Set-up..................................... go to page 1.1
• Installation & Wiring ................go to page 2.1
Watlow Controls
Phone: (507) 454-5300, Fax: (507) 452-4507 http://www.watlow.com
TOTAL
CUSTOMER
CUS
SATISFACTI
CTION
3 Y ear Warranty
ISO 9001
Registered Company
Winona, Minnesota USA
$10.00
Made in the U.S.A.
Printed on Recycled Paper 10% Postconsumer Waste

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Summary of Contents for Watlow Controls Series 998

  • Page 1 Series 998 User’s Manual Dual Channel, 1/8 DIN, Microprocessor-Based Temperature/Process Controller User Levels: • New User......go to Introduction • Experienced User....go to page 4.1 • Expert User......go to page 4.1 Installers: TOTAL • Set-up........go to page 1.1 CUSTOMER •...
  • Page 2 Your Feedback Your comments or suggestions on this manual are welcome, please send them to: Technical Writer, Watlow Controls, P.O. Box 5580, Winona, MN 55987-5580, Phone: (507) 454-5300, Fax: (507) 452-4507. The Series 998 User’s Manual is copyrighted by Watlow Winona, Inc., © February...

  • Page 3: Table Of Contents

    Table of Contents Introduction Chapter 5 Starting Out with the Watlow Series 998 The Operation Menus The Series 998 Navigating the Operation Menus Display Loop The System Menu Operation Menus The Set Point Menu Setup Menus System Prompts Factory Menus PID A Menu 5.13 PID B Menu...
  • Page 4 Notes WATLOW Series 998 User’s Manual Table of Contents...

  • Page 5: Introduction

    SERIES 998 The Series 998. Watlow’s Series 998 process controller is capable of two independent channels of process control. Each channel can be configured and tuned separately. Each alarm option (outputs 3 and 4) can be used to trigger an alarm based on either channel.

  • Page 6: Display Loop

    Output 2 Rate B [dE2A] [dE2b] Output 2 Derivative A Output 2 Derivative B [Ct2A] [Ct2b] Output 2 Cycle Time B Output 2 Cycle Time A [db`A] [db`b] Dead Band B Dead Band A Introduction WATLOW Series 998 User’s Manual...

  • Page 7: Setup Menus

    [A`Ou] [2`4`] [OtY3] Output 3 Module [A100] [2`20] [OtY4] Output 4 Module [b`50] [2`0`] [dISP] Test Displays [b`00] [2`10] [tout] Test Outputs [b`OH] [3`LO] [b`20] [3`HI] [b`15] [`rSt] Restore Factory Values [`dFL] Default Prompts Introduction WATLOW Series 998 User’s Manual...
  • Page 8 Notes Introduction WATLOW Series 998 User’s Manual...

  • Page 9: Hardware Setup

    Chapter 1 Hardware Setup DIP Switch Locations and Functions The Watlow Series 998 has at least one and as many as six dual in-line package (DIP) switches inside the controller, depending on the model number. They allow users to configure the controller for a variety of input sensors, to provide power for external signal conditioners or to lockout front panel access to some functions.

  • Page 10: Input Type Dip Switches

    ↑ thermocouple: R, S or B ↑ thermocouple: J, K, T, N, E, C, D, Pt2 Figure 1.2 - ↑ 0-20 or 4-20mA; 0-5, 1-5 or 0-10V Input DIP switches. Hardware Setup, Chapter 1 WATLOW Series 998 User’s Manual...
  • Page 11 DIPs. 3 - When the DIP switches are set, gently insert the controller chassis into the case and push it firmly into place until all four tabs snap into place. Hardware Setup, Chapter 1 WATLOW Series 998 User’s Manual...
  • Page 12 (Switch 1 has no effect.) ↑ ↑ lockout Setup and Factory menus Figure 1.4 - (Switch 1 has no effect.) Lockout DIP switch. Commu- Input Output Global nications Panel Diagnostics Calibration Lockout Hardware Setup, Chapter 1 WATLOW Series 998 User’s Manual...

  • Page 13: Installation And Wiring

    SERIES 998 2.18" (55mm) Adjustable Panel Mounting Bracket NOTE: Adjustable mount- ing brackets can also be side mount- Figure 2.1b - Series 998 0.68" 4.06" Dimensions. (103 mm) (17 mm) Installation and Wiring, Chapter 2 WATLOW Series 998 User’s Manual...

  • Page 14: Installing The Series 998

    Top and Bottom (997 or 999) View Top and Bottom (996 or 998) Adjustable Panel or Side (997 or 999) View Mounting Bracket Release Tabs Mounting Slots Bezel Mounting Collar External Gasket Installation and Wiring, Chapter 2 WATLOW Series 998 User’s Manual...
  • Page 15 Make sure the inside gasket is seated properly and not twisted. 7. To release the mounting brackets, loosen the mounting bracket screws and push the brackets forward, then pull it up and out. Installation and Wiring, Chapter 2 WATLOW Series 998 User’s Manual...

  • Page 16: Wiring The Series 998

    National Electric Input-to-output Isolation Code (NEC) safety practices when The Series 998 uses optical isolation between the analog inputs and the wiring and connect- controller outputs/digital input. This isolation provides a 500VÅ (ac) bar- ing this unit to a rier to prevent ground loops when using grounded sensors and/or power source and peripheral equipment.

  • Page 17: Process Inputs

    Please make sure your customer’s transmitter / transducer fall within our Series 988 family (1/8 DIN) of controllers’ Process Input specification of 7 ohms input impedance. Installation and Wiring, Chapter 2 WATLOW Series 998 User’s Manual...

  • Page 18: Wiring Example

    Limit Sensor property and equip- ment, use National Electric Code (NEC) standard wiring practices to install and operate the series 998. Failure to do so could result in such dam- age. Installation and Wiring, Chapter 2 WATLOW Series 998 User’s Manual...

  • Page 19: Wiring Notes

    NOTE: Sketch in your application on this page or a copy of it. See wiring exam- ples in this chapter and in the Appen- dix. Figure 2.7 - Wiring notes. Installation and Wiring, Chapter 2 WATLOW Series 998 User’s Manual...

  • Page 20: Channel A Input Wiring

    Input impedance: 7Ω prevent a high in- rush current which could burn out the ↑ controller’s 7-ohm resistor. See page Dip Switch Setting 2.4. for recommen- dations. Installation and Wiring, Chapter 2 WATLOW Series 998 User’s Manual...

  • Page 21: Channel B Input Wiring

    0-20mA and 4-20mA process wiring to prevent a high in- rush current which 18 - could burn out the ↑ controller’s 7-ohm resistor. See page Dip Switch Setting 2.4. for recommen- dations. Installation and Wiring, Chapter 2 WATLOW Series 998 User’s Manual...

  • Page 22: Channel A Output Wiring

    — 0-5VÎ Î , 1-5VÎ Î and 0-10VÎ Î (dc) Process Figure 2.10d Load impedance: 500Ω min. 99 _ _ - _ _ F _ - _ _ _ _ 2.10 Installation and Wiring, Chapter 2 WATLOW Series 998 User’s Manual...

  • Page 23: Channel B Output Wiring

    — 0-5VÎ Î , 1-5VÎ Î and 0-10VÎ Î (dc) Process Figure 2.11d Load impedance: 500Ω min. 99 _ _ - _ _ _ F - _ _ _ _ Installation and Wiring, Chapter 2 2.11 WATLOW Series 998 User’s Manual...

  • Page 24: Output 3 Wiring

    99 _ _ - _ _ _ _ - T _ _ _ Transmitter connected to input 4-20mA out 1 or input 2. See Chapter 1 for DIP switch location and set- tings. Input 1 or 2 2.12 Installation and Wiring, Chapter 2 WATLOW Series 998 User’s Manual...

  • Page 25: Output 4 Wiring

    1 or input 2. Input 1 or 2 For data communications wiring refer to How to Use Data Communications with the Watlow Series 988 Family Controls. Installation and Wiring, Chapter 2 2.13 WATLOW Series 998 User’s Manual...
  • Page 26 Notes 2.14 WATLOW Series 998 User’s Manual Installation and Wiring, Chapter 2...

  • Page 27: Keys And Displays

    Press simultaneously for three seconds to enter the Setup Menu. Continue to press both keys for another three seconds to enter the Factory Menu. Figure 3.1 - Series 998 Keys and Displays. Keys and Displays, Chapter 3 WATLOW Series 998 User’s Manual...

  • Page 28: Display Key And Loop

    Display Loop Display Key and Loop On power up, the Series 998 displays the channel A set point value in the NOTE: lower display and the channel A process value in the upper display and Lower display alter- the CH A (channel A) indicator light is on. Press the Display key once to nately flashes view the channel B set point and process values (CH B will be lit).

  • Page 29: The Setup Menus

    After stepping from any point in through each menu, the Series 998 returns to the Setup Menu prompt. any menu. Use the Up-arrow or Down-arrow key to select the next menu, or use the Mode key to advance through the same menu again.

  • Page 30: Input Menu

    [Ftr2] *Input 2 Software Filter µ ↓ [Lin2] *Input 2 Linearization µ ↓ ← µ [`Alt] *Altitude *Prompts may not appear, depending Figure 4.2 - on controller configuration. The Input Menu. Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 31 A. A wet bulb input on input 2, in com- bination with the dry bulb temperature, senses relative humidity on chan- nel B. The Series 998 calculates the temperature difference between the two bulbs to determine percent relative humidity. With a wet bulb/dry bulb configuration, the Input 2 Linearization prompt [Lin2] must be set to [`Wb].
  • Page 32 Rotronic configuration, channel A is used to measure temperature and channel B must be a process input with the Input 2 Linearization prompt [Lin2] set to [H260]. The Series 998 provides temperature compensation for the Rotronic sensor. The humidify and dehumidify outputs (outputs 1B and 2B) are disabled NOTE: when the channel A temperature falls below -5˚F/-20˚C, or goes above...
  • Page 33 Setup-Input Input Prompts When you are in the Setup menus, the Series 998 displays the menu NOTE: selection ( [InPt], [OtPt], [GLbL] or [COM] ) in the upper display, and Decimal points may [`SEt] in the lower display. not always be in the position specified The Up-arrow >...
  • Page 34 • This affects propbands, alarm set points, process set points, calibration offsets, deadbands and ranges. [dEC1] This prompt appears only if you have set Input 1 [`In1] to a process input. Default ↓ [```)] [``)0] [`)00] [)000] [dEC1] [DEC1] [dEC1] [dEC1] Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...

  • Page 35: Global Menu

    [-200]…[`399] [```n] [``32]…[2372] [```0]…[1300] [```E] [-328]…[1470] [-200]…[`799] (W5) [```C] [``32]…[4200] [```0]…[2316] (W3) [```d] [``32]…[4200] [```0]…[2316] [`Pt2] [``32]…[2543] [```0]…[1395] [`rL1] [`rH1] Range Low 1 and Range High 1 continued on next page. Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 36 [``°C] & [`r†d] [-5%5] … [[``)0] … [`5%5] [`C_F] [`In1] [CAL1] [CAL1] [CAL1] (Global Menu) (Input Menu) [-999] … [```0] … [`999] units [CAL1] [CAL1] [CAL1] a process input is selected Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 37 • Select a negative value to filter the input signal. • Set the value to [```0] to disable the filter. [Ftr1] This prompt always appears. Default ↓ [`-60] … [```0] … [``60] [Ftr1] [Ftr1] [Ftr1] Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 38 [`rtd] [`r†d] [``no] [`In2] [`In2] [`In2] ↑ 4-20mA 0-20mA 0-5VÎ 1-5VÎ 0-10VÎ (dc) no Input 2 DIP [4-20] [0-20] [`0-5] [`1-5] [0-10] [``no] [`In2] [`In2] [`In2] [`In2] [`In2] [`In2] ↑ process 4.10 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 39 • Choose between Fahrenheit and Celsius at the [`C_F] prompt in the [`rL2] Global Menu. [`rH2] [`rL2] [`rH2] These prompts appear only if [`In2] is not set to [``no]. Range Low 2 and Range High 2 continued on next page. Setup Menus, Chapter 4 4.11 WATLOW Series 998 User’s Manual...
  • Page 40 [``32]…[3200] [```0]…[1760] [`in2] [```S] [``32]…[3200] [```0]…[1760] [```b] [``32]…[3300] [```0]…[1816] [`rtd] [-328]…[1472] [-200]…[`800] [`r†d] [-9(9]…[99(9] [-7#3]…[53&7] [4-20] [-999]…[`999] units [0-20] [-999]…[`999] units [`0-5] [-999]…[`999] units [`1-5] [-999]…[`999] units [0-10] [-999]…[`999] units 4.12 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 41 European (DIN, 0.003850Ω/Ω/°C) or the Japanese (JIS, 0.003916Ω/Ω/°C) linearization standard. [rtd2] This prompt appears only if you have set [`In2] to [`rtd] or [`r†d]. Default ↓ [`din] [`JIS] [rtd2] [rtd2] Setup Menus, Chapter 4 4.13 WATLOW Series 998 User’s Manual...
  • Page 42 Altitude Compensation Set barometric correction for altitude above sea level. [`Alt] This prompt appears only if [Lin2] is set to [`Wb]. Default ↓ [```0] [2500] [5000] feet [`ALt] [`ALt] [`ALt] 4.14 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 43 Notes Setup Menus, Chapter 4 4.15 WATLOW Series 998 User’s Manual...
  • Page 44 [`ArL] *Retransmit Low Limit µ ↓ *Prompts may not [`ArH] *Retransmit High Limit µ appear, depending on ↓ controller configuration. ← µ [ACAL] *Retransmit Calibration Offset Figure 4.16 - The Output Menu. 4.16 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 45 Output Prompts NOTE: Decimal points may not always be in the When you are in the Setup menus, the Series 998 displays the menu position specified selection ( [InPt], [OtPt], [GLbL] or [COM] ) in the upper display, and below, depending [`SEt] in the lower display.
  • Page 46 [``°C] & [`r†d] [``)1] … [``@0] … [`5%5] [`C_F] [`In2] [HY1A] [HY1A] [HY1A] (Global Menu) (Input Menu) [```1] … [```3] … [`999] units [HY1A] [HY1A] [HY1A] a process input is selected 4.18 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 47 This prompt only appears if [Ot1A] is set to [``Ht]. [Ot2A] This prompt appears only if channel A output is something other than a process output (99__-__F_-____). Default ↓ [``no] [``Ht] [``CL] [Ot2A] [Ot2A] [Ot2A] Setup Menus, Chapter 4 4.19 WATLOW Series 998 User’s Manual...
  • Page 48 [PrcA] This prompt appears only on controllers equipped with channel A process hardware (99__-__F_-____). Default ↓ 4-20mA 0-20mA 0-5VÎ 1-5VÎ 0-10VÎ (dc) [4-20] [0-20] [`0-5] [`1-5] [0-10] [PrcA] [PrcA] [PrcA] [PrcA] [PrcA] 4.20 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 49 [``)1] … [``@0] … [`5%5] [``°C] & [`r†d] [`C_F] [`In1] [HY1b] [HY1b] [HY1b] (Global Menu) (Input Menu) [```1] … [```3] … [`999] units [HY1b] [HY1b] [HY1b] a process input is selected Setup Menus, Chapter 4 4.21 WATLOW Series 998 User’s Manual...
  • Page 50 [``°C] & [`r†d] [``)1] … [``@0] … [`5%5] [`C_F] [`In1] [HY2b] [HY2b] [HY2b] (Global Menu) (Input Menu) [```1] … [```3] … [`999] units [HY2b] [HY2b] [HY2b] a process input is selected 4.22 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 51 [`Ot3] This prompt appears only on controllers equipped with output 3 See Chapter 7 for hardware for a relay (99__-____-B___, or 99__-____-J___ or 99__-____-K___) more information on or switched dc (99__-____-C___). alarms. Default ↓ [`AL3] [AL3n] [``no] [`Ot3] [`Ot3] [`Ot3] Setup Menus, Chapter 4 4.23 WATLOW Series 998 User’s Manual...
  • Page 52 [`AL3] This prompt appears only on controllers equipped with output 3 alarm hardware (99__-____-B___, or 99__-____-C___, or 99__-____-K___ or 99__-____-J___), and with [`Ot3] set to [`AL3] or [AL3n]. Default ↓ [`PrA] [`deA] [`Prb] [`]dEb] [`AL3] [`AL3] [`AL3] [`AL3] 4.24 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 53 [``°C] & [`r†d] [``)1] … [[``@0] … [`5%5] [`C_F] [`In1] [HYS3] [HYS3] [HYS3] (Global Menu) (Input Menu) [```1] … [```3] … [`999] units [HYS3] [HYS3] [HYS3] a process input is selected Setup Menus, Chapter 4 4.25 WATLOW Series 998 User’s Manual...
  • Page 54 [SIL3] This prompt appears only on controllers equipped with output 3 hardware (not 99__-____-A___) and with [`Ot3] (Output Menu) set to [`AL3] or [AL3n]. Default ↓ [`OFF] [``On] [SIL3] [SIL3] 4.26 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 55 (99__-____-_B__, or 99__-____-_D__, or 99__-____-_E__ or 99__-____-_K__) or switched dc (99__-____-_C__), and with [`Ot4] set to [`AL4] or [AL4n]. Default ↓ [`PrA] [`deA] [`Prb] [`deb] [`AL4] [`AL4] [`AL4] [`AL4] Setup Menus, Chapter 4 4.27 WATLOW Series 998 User’s Manual...
  • Page 56 [LAt4] This prompt appears only on controllers equipped with output 4 hardware for a relay (99__-____-_B__, or 99__-____-_D__, or 99__-____-_E__ or 99__-____-_K__, or switched dc (99__-____-_C__) and with [`Ot4] set to [`AL4] or [AL4n]. Default ↓ [`nLA] [`LAt] [LAt4] [LAt4] 4.28 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 57 [Aout] This prompt appears only on controllers equipped with output 3 retransmit hardware (99__ - ____ - M___ or 99__ - ____ - N___). Default ↓ [PrcA] [SP`A] [Prcb] [SP`b] [``no] [Aout] [Aout] [Aout] [Aout] [Aout] Setup Menus, Chapter 4 4.29 WATLOW Series 998 User’s Manual...
  • Page 58 [Aout] is set to [PrcA] or [Prcb]. [`ArL] This prompt appears only on controllers equipped with retransmit hardware (99__-____-M___ or 99__-____-N___) and with [Aout] not set to [``no]. [-999] … [`ArH] [`ArL] [`ArL] 4.30 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 59 [ACAL] [ACAL] (Global Menu) [``°C] [-555] … [[```0] … [`555] [`C_F] [ACAL] [ACAL] [ACAL] (Global Menu) [-999] … [```0] … [`999] units [ACAL] [ACAL] [ACAL] a process input is selected Setup Menus, Chapter 4 4.31 WATLOW Series 998 User’s Manual...
  • Page 60 [``°f] [``°C] [`C_F] [`C_F] Press the Up-arrow key > or the Down-arrow key < to select one of the prompt values. Figure 4.32 - The Global Menu. 4.32 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 61 Setup-Global Global Prompts NOTE: When you are in the Setup menus, the Series 998 displays the menu Decimal points may selection ( [InPt], [OtPt], [GLbL] or [COM] ) in the upper display, and not always be in the [`SEt] in the lower display.
  • Page 62 • [`LOC] locks out the front panel keys. • [`ALr] resets an alarm. • [`OFF] turns all control outputs off (de-energize relays). [`Ei1] This prompt always appears. Default ↓ [``no] [`LOC] [`ALr] [`OFF] [`Ei1] [`Ei1] [`Ei1] [`Ei1] 4.34 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 63 • [StPt] Activates ramping on power up and any set point change. nately flashes {`rp`} and lower [rP`A] This prompt always appears. display value when ramping is in Default process. ↓ [`OFF] [Strt] [StPt] [rP`A] [rP`A] [rP`A] Setup Menus, Chapter 4 4.35 WATLOW Series 998 User’s Manual...
  • Page 64 Set the rate of heating for channel B. [rt`b] This prompt appears when [rP`B] is set to [Strt] or [StPt]. Default ↓ [```0] … [`100] … [9999] degrees/minute [rt`b] [rt`b] [rt`b] 4.36 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 65 Notes Setup Menus, Chapter 4 4.37 WATLOW Series 998 User’s Manual...
  • Page 66 (99__-____-_R__ or 99__-____-_S__). See Data Communications with the Series 988 Family of Figure 4.38 - Controllers for detailed informa- The Communications tion on communications. Menu. 4.38 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...
  • Page 67 Setup-Communications Communications Prompts When you are in the Setup menus, the Series 998 displays the menu selection ( [InPt], [OtPt], [GLbL] or [COM] ) in the upper display, and [`SEt] in the lower display. The Up-arrow > or Down-arrow key < selects another menu. Press the Mode key µ...
  • Page 68 • [`485] selects EIA/TIA-485. • [`422] selects EIA/TIA-422. [IntF] This prompt appears only on controllers equipped with communi- cations hardware for EIA/TIA-485 and EIA/TIA-422 (99__-____-_S__). Default ↓ [`485] [`422] [IntF] [IntF] 4.40 Setup Menus, Chapter 4 WATLOW Series 998 User’s Manual...

  • Page 69: The Operation Menus

    You will not see every prompt in any of these menus. The controller’s con- figuration and model number determine which prompts appear. After stepping through each menu, the Series 998 returns to the Operation Menu prompt. Use the Up-arrow and Down-arrow keys to select the next menu, or use the Mode key to advance through the same menu again.

  • Page 70: The System Menu

    *Prompts may not appear, depending [Ot3S [Ot3s] on controller configuration. Press the Up-arrow key to step through the prompt values. The Down-arrow key backs through the values. Figure 5.2 - The System Menu. Operation Menus, Chapter 5 WATLOW Series 998 User’s Manual...

  • Page 71: System Prompts

    After you step past the Set Point 2A prompt [SP2A] and the Set Point 2B NOTE: prompt [SP2b] to the Operation menus, the Series 998 displays the menu Decimal points may selection ( [`SYS], [PidA] or [PidB] ) in the upper display and [OPEr] in not always be in the the lower display.
  • Page 72 Indicates whether the output 4 circuit is energized, [CLOS], or de- energized, [OPEn]. This is a read-only prompt. [Ot4S] This prompt appears only in controllers with output 4 hardware (not 99__-____-_A__). [OPEn] [CLOS] [Ot4S] [Ot4S] Operation Menus, Chapter 5 WATLOW Series 998 User’s Manual...
  • Page 73 [`AL3] [`AL3] [A3HI] [`rH1] (or [`rH2] ) sensor (Output Menu) (Input Menu) range [`dEA] or [`dEb] [```0] … [`999] … [9999] [`AL3] [`AL3] [A3HI] [A3HI] [A3HI] (Output Menu) Operation Menus, Chapter 5 WATLOW Series 998 User’s Manual...
  • Page 74 [`AL4] [`AL4] [A4HI] [`rH1] (or [`rH2] ) sensor (Output Menu) (Input Menu) range [`dEA] or [`dEb] [```0] … [`999] … [9999] [`AL4] [`AL4] [A4HI] [A4HI] [A4HI] (Output Menu) Operation Menus, Chapter 5 WATLOW Series 998 User’s Manual...
  • Page 75 Operation-System [`AUt] Auto-tune Initiate an auto-tune. [`AUt] This prompt always appears. NOTE: For more informa- Default tion on auto-tune ↓ see Chapter 7. [`OFF] [PidA] [Pidb] [`AUt] [`AUt] [`AUt] Operation Menus, Chapter 5 WATLOW Series 998 User’s Manual...
  • Page 76 … [dE1A] [dE1A] [dE1A] [dE1A] Press the Up-arrow key > to step through the prompt values. The Down-arrow key < backs through the values. Figure 5.8 - The PID A Menu. Operation Menus, Chapter 5 WATLOW Series 998 User’s Manual...
  • Page 77 After you step past the Set Point 2A prompt [SP2A] and the Set Point 2B position specified prompt [SP2b] to the Operation menus, the Series 998 displays the menu below, depending on the Decimal 1...
  • Page 78 When set to [```0] integral is disabled. [It1A] This prompt appears only if [`dFL] (Calibration Menu) is set to [``S1] and [Pb1A] is not set to [```0]. Default ↓ [`)00] … [9(99] min./repeat [It1A] [It1A] 5.10 Operation Menus, Chapter 5 WATLOW Series 998 User’s Manual...
  • Page 79 When set to [```0] derivative is disabled. [dE1A] This prompt appears only if [`dFL] (Calibration Menu) is set to [``SI] and [Pb1A] is set higher than [```0]. Default ↓ [`)00] … [`(99] min. [dE1A] [dE1A] Operation Menus, Chapter 5 5.11 WATLOW Series 998 User’s Manual...
  • Page 80 [db`A] [db`A] (Global Menu) [``°C] [-555] … [```0] … [`555] [`C_F] [db`A] [db`A] [db`A] (Global Menu) [-999] … [```0] … [`999] a process units input is selected [db`A] [db`A] [db`A] 5.12 Operation Menus, Chapter 5 WATLOW Series 998 User’s Manual...
  • Page 81 [dE1b] [dE1b] [dE1b] [dE1b] Press the Up-arrow key > to step through the prompt values. The Down-arrow key < backs through the values. Figure 5.13 - The PID B Menu. Operation Menus, Chapter 5 5.13 WATLOW Series 998 User’s Manual...
  • Page 82 After you step past the Set Point 2A prompt [SP2A] and the Set Point 2B not always be in the prompt [SP2b] to the Operation menus, the Series 998 displays the menu position specified selection ( [`SYS], [PidA] or [PidB] ) in the upper display and [OPEr] in below depending the lower display.
  • Page 83 [It1b] This prompt appears only if [`dFL] (Calibration Menu) is set to [``S1] and [Pb1b] is not set to [```0]. Default ↓ [`)00] … [9(99] min. / repeat [It1b] [It1b] Operation Menus, Chapter 5 5.15 WATLOW Series 998 User’s Manual...
  • Page 84 When set to [```0] derivative is disabled. [dE1b] This prompt appears only if [`dFL] (Calibration Menu) is set to [``SI] and [Pb1b] is set higher than [```0]. Default ↓ [`)00] … [`(99] min. [dE1b] [dEbb] 5.16 Operation Menus, Chapter 5 WATLOW Series 998 User’s Manual...
  • Page 85 [db`b] [db`b] (Global Menu) [``°C] [-555] … [```0] … [`555] [`C_F] [db`b] [db`b] [db`b] (Global Menu) [-999] … [```0] … [`999] a process units input is selected [db`b] [db`b] [db`b] Operation Menus, Chapter 5 5.17 WATLOW Series 998 User’s Manual...
  • Page 86 Notes 5.18 Operation Menus, Chapter 5 WATLOW Series 998 User’s Manual...

  • Page 87: The Factory Menus

    After can only be entered when the Setup stepping through each menu, the Series 998 returns to the Factory Menu prompt [`SEt] is prompt. Use the Up-arrow or Down-arrow key to select the next menu, or displayed.

  • Page 88: Panel Lockout Menu

    [```3] *Prompt may not appear, depending on controller configuration. [`LOC] [`LOC] [`LOC] [`LOC] Press > or < to select one of the prompt values. Figure 6.2 - The Panel Lockout Menu. Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...

  • Page 89: Front Panel Lockout

    Factory-Panel Lockout Panel Lockout Prompts When you are in the Factory menus, the Series 998 displays the menu selection ( [PLOC], [diAg] or [`CAL] ) in the upper display and [FctY] in the lower display. The Up-arrow > or Down-arrow key < selects another menu. Press the Mode key µ...
  • Page 90 Select the lockout level for the PID B Menu. Set the lockout to no lock- out [none], read only [read] or full lockout [FULL]. [Pidb] This prompt always appears. Default ↓ [none] [read] [FULL] [Pidb] [Pidb] [Pidb] Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...
  • Page 91 Select the lockout level for the Global Menu. Set the lockout to no lock- out [none], read only [read] or full lockout [FULL]. [gLbL] This prompt always appears. Default ↓ [none] [read] [FULL] [gLbL] [gLbL] [gLbL] Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...

  • Page 92: Diagnostics Menu

    Select the lockout level for the Calibration Menu. Set the lockout to no lockout [none], read only [read] or full lockout [FULL]. [`CAL] This prompt always appears. Default ↓ [none] [read] [FULL] [`CAL] [`CAL] [`CAL] Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...
  • Page 93 Notes Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...
  • Page 94 [diSP] Test Displays NOTE: µ ↓ In the Diagnostics Menu only the values of [dISP] ← µ [tout] Test Outputs and [tout] can be changed. Figure 6.8 - The Diagnostics Menu. Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...
  • Page 95 Shows the ambient temperature at the input 1 terminals. The temper- ature is shown in °F in the form [00)0] regardless of the settings of [deC1], [deC2], [`dfl] or [`C_F]. [AMb] This prompt always appears. Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...
  • Page 96 • [UOFF] universal off • [Urtd] universal rtd • [Utch] universal high-gain thermocouple • [UtcL] universal low-gain thermocouple • [UMu] universal millivolts • [UPrc] universal process [ity1] [ity2] These prompts always appear. 6.10 Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...
  • Page 97 • [Uret] voltage/retransmit (N) • [Iret] current/retransmit (M) • [SpLy] power supply (T) • [`232] EIA/TIA-232 communications (R) • [`485] EIA/TIA-485 or EIA/TIA-422 communications (S) [Oty1] [Oty2] [Oty3] [Oty4] These prompts always appear. Factory Menus, Chapter 6 6.11 WATLOW Series 998 User’s Manual...
  • Page 98 [`OFF] is selected. If any of the LEDs fail to light contact the factory. [tout] This prompt always appears. Default ↓ [`OFF] [out1] [out2] [out3] [out4] [tout] [tout] [tout] [tout] [tout] 6.12 Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...
  • Page 99 Notes Factory Menus, Chapter 6 6.13 WATLOW Series 998 User’s Manual...
  • Page 100 Display key ¥ to return to the Display loop. Refer to Calibrating Watlow Process Controls Figure 6.14 - for information about the The Calibration Menu Calibration Menu. 6.14 Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...
  • Page 101 • [``SI] (international) sets the controller to °C; derivative in minutes; proportional band in percent of span; and integral in minutes per repeat. [`dFL] This prompt always appears. Default ↓ [``US] [``sI] [`dFL] [`dFL] Factory Menus, Chapter 6 6.15 WATLOW Series 998 User’s Manual...
  • Page 102 Notes 6.16 Factory Menus, Chapter 6 WATLOW Series 998 User’s Manual...

  • Page 103: Tuning, Manual Operation, Alarms And Error Codes

    Once auto-tune has begun, the process must cross the set point four times within 80 minutes for the 998 to successfully complete the auto- tune. If this does not happen within the time limit, the Series 998 chooses PID values based on the 80-minute tuning cycle performed.

  • Page 104: Manual Tuning

    The parameters within the procedure apply to both output 1A, 2A, 1b and 2b and PID A and PID B. 1. Apply power to the Series 998 and enter a set point. Begin with these PID parameters: [``Pb] set to [```1];...

  • Page 105: Manual And Automatic Operation

    The Auto/Manual light (located at the key) indicates auto or manual oper- ation. When it is on, the channel indicated by the CH A or CH B light, is Tuning, Alarms and Error Codes, Chapter 7 WATLOW Series 998 User’s Manual...

  • Page 106: Changing The Output 3 Alarm Jumper

    Using Alarms Output 3 and/or 4 of the Series 998 can be selected as alarms. This is accomplished in the Output Menu under the [`Ot3] or [`Ot4] prompt. If [`AL3] or [`AL4] is selected, the output is energized in the non-alarm condition and de-energizes the output in the alarm condition.
  • Page 107 Any future deviation outside this safe region triggers an alarm. If an alarm occurs at this point, the output can be silenced by pressing the Auto/Man key once, but the alarm message is still displayed. Tuning, Alarms and Error Codes, Chapter 7 WATLOW Series 998 User’s Manual...

  • Page 108: Error Code E1 And E2 Messages

    Error Codes Error Code E1 and E2 Messages Four dashes, [----], in the upper display indicate a Series 998 error. The associated channel goes to 0% output. To view the error code press the Auto/Man key once. The upper display shows the error code for five sec- onds before returning to the [----] display.

  • Page 109: Error Code Actions

    ...and the control was in auto operation when the error occurred, it goes into manual (% power) operation. The power level is determined by the [FAIL] value (-100 to 100%). See the table. Tuning, Alarms and Error Codes, Chapter 7 WATLOW Series 998 User’s Manual...
  • Page 110 • If [`Err] is set to [`LAt], correct the problem and cycle power. You can also clear the error by pressing the Up-arror or Down-arrow keys > < to enter the Setup Menu, then press the Display key ∂. Tuning, Alarms and Error Codes, Chapter 7 WATLOW Series 998 User’s Manual...

  • Page 111: Burst Fired Zero Cross Output

    • Retransmit • Transmitter Power Supply Burst Fired Zero Cross Output The Series 998 can provide a variable time base, zero cross output with superior controllability compared to a fixed time base, time proportioning ç control. This eliminates the need for additional hardware associated with power control devices.

  • Page 112: Retransmit

    0-5VÎ, 1-5VÎ or 0-10VÎ (dc) can be selected. Here’s an example: The Series 998 is controlling the temperature of a heat treat oven. The temperature of the process must be recorded on a chart recorder. The oven’s temperature operating range is from 600 to 900°F. The chart recorder requires a 4-20mA signal.

  • Page 113: Dead Band

    Transmitter Power Supply When option “T” is ordered for output 3 or 4, the Series 998 can supply power to external signal conditioners, transducers or transmitters. Via internal DIP switches, user selectable options include 5, 12 or 20VÎ (dc) @ 30mA ratings, which are UL listed.
  • Page 114 Notes Applications, Chapter 8 WATLOW Series 998/999 User’s Manual...

  • Page 115: Appendix

    3 Year Warranty Warranty Returns The Watlow Series 998 is warranted to be free of 1. Call Watlow Customer Service, (507) 454-5300, defects in material and workmanship for 36 months for a Return Material Authorization (RMA) num- after delivery to the first purchaser for use, providing ber before returning any item for repair.
  • Page 116 — In proportional controllers, the difference thermocouple metals and the electronic instru- between set point and actual value after the system sta- ment. See junction, reference. bilizes. junction, reference — The junction in a ther- Appendix WATLOW Series 998 User’s Manual...
  • Page 117 Expressed in units, degrees or percent of span. See mistor can have either a negative or positive tem- PID. perature coefficient. Appendix WATLOW Series 998 User’s Manual...
  • Page 118 — Action that provides output switching only at or near the zero-voltage crossing points of the ac sine wave. See burst fire. zero switching — See zero cross. Appendix WATLOW Series 998 User’s Manual...

  • Page 119: Index

    7.3 hysteresis 4 4.28 process B 3.2, 4.23 cycle time, output 1A or 2A 5.12 process input 2.4, 2.5 cycle time, output 1B or 2B 5.17 process retransmit 2.12 proportional band adjustment 7.2 Appendix WATLOW Series 998 User’s Manual...
  • Page 120 (alarms) 3 4.26 silencing (alarms) 4 4.29 specifications A.8 software filter 1 4.9 software filter 2 4.14 software revision 6.9 switched dc 2.12, 2.13 System Menu 5.2 - 5.7 system menu lockout 6.4 Appendix WATLOW Series 998 User’s Manual...

  • Page 121: Prompt Index

    [OtY3] output 3 module type 6.11 [OtY4] output 4 module type 6.11 [tout] test outputs 6.12 [`Ei1] event input 1 4.34 [Ei1S] event input 1 status 5.4 [Pb1a] proportional band, output 1A [`Err] error latching 4.34 Appendix WATLOW Series 998 User’s Manual...

  • Page 122: Specifications

    (0 to 1760°C) • Retransmit: 1Hz. Type S 32 to 3200°F (0 to 1760°C) • PID: 10Hz. • • Control outputs: 10Hz. • Alarm outputs: 1Hz. • Display: 2Hz. Resolution • Inputs: 16 bits. Appendix WATLOW Series 998 User’s Manual...

  • Page 123: Ordering Information

    Not an ANSI symbol. ® is a registered trademark of the Underwriters Laboratories, Inc. Slo-Blo ® is a registered trademark of Littelfuse, Inc. Appendix WATLOW Series 998 User’s Manual...

  • Page 124: Declaration Of Conformity

    73/23/EEC Directive liée aux basses tensions EN 61010-1 : 1993 Exigences de sécurité pour le matériel électrique de ________________________________________ mesure, commande et de laboratoire, Partie 1 : Signature of Authorized Representative Exigences générales A.10 Appendix WATLOW Series 998 User’s Manual (1231)
  • Page 125 Notes Appendix A.11 WATLOW Series 998 User’s Manual...
  • Page 126 Watlow Series 998 User’s Manual Watlow Controls, 1241 Bundy Boulevard, P.O. Box 5580, Winona, Minnesota USA 55987-5580 Phone: (507) 454-5300, Fax: (507) 452-4507 http://www.watlow.com...

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