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A.4 WATLOW Series 988 User’s Manual
Appendix
Specifications
Control Mode
• Dual input, quad output, optional retransmit of set
point or process variable.
• Programmable direct and reverse acting control out-
puts.
• One-step auto-tuning.
Operator Interface
• Local/remote set point capability.
• Dual, 4-digit LED displays: upper, 0.4” (10mm); lower,
0.3” (8mm).
• Mode, Auto/Man, Display, Up and Down keys.
Input
• Contact input for software function select.
• Type J, K, T, N, C(W5)
2
, D(W3)
2
, E, R, S, B, Pt 2
2
thermocouple, 1° or 0.1° RTD.
• 0-50mVÎ (dc), 0-20mA, 4-20mA, 0-5VÎ (dc), 1-5VÎ
(dc), 0-10VÎ (dc) process.
• Slidewire, digital event input or heater current options.
• Sensor break protection de-energizes control output to
protect system or selectable bumpless transfer to
manual operation. Latching or non-latching.
• °F or °C display or process units, user selectable.
Sensor Ranges
J t/c: 32 to 1500°F or 0 to 816°C
K t/c: -328 to 2500°F or -200 to 1371°C
T t/c: -328 to 750°F or -200 to 399°C
N t/c: 32 to 2372°F or 0 to 1300°C
R t/c: 32 to 3200°F or 0 to 1760°C
S t/c: 32 to 3200°F or 0 to 1760°C
B t/c: 1598 to 3300°F or 870 to 1816°C
E t/c: -328 to 1470°F or -200 to 799°C
C t/c (W5)
2
: 32 to 4200°F or 0 to 2316°C
D t/c (W3)
2
: 32 to 4200°F or 0 to 2316°C
Pt 2
2
: 32 to 2543°F or 0 to 1395°C
1°RTD (JIS): -328 to 1166°F or -200 to 630°C
1°RTD (DIN): -328 to 1472°F or -200 to 800°C
0.1°RTD
(JIS and DIN):-99.9 to 999.9°F or -73.3 to 537.7°C
0-5VÎ (dc): -999 to 9999
1-5VÎ (dc): -999 to 9999
0-10VÎ (dc): -999 to 9999
0-20mA: -999 to 9999
4-20mA: -999 to 9999
0-50mVÎ (dc):-999 to 9999
Slidewire: 100 to 1200Ω
Current: 0 to 50A
Potentiometer: 0 to 1200Ω
Output Options
• Solid-state relay, 0.5A @ 24VÅ (ac) min., 253VÅ (ac)
max., opto-isolated, burst fire. With or without contact
suppression.
• Open collector: Max. voltage 42VÎ (dc), max. current
1A.
• Switched dc signal: Min. turn-on voltage of 3VÎ (dc)
into min. 500Ω load; max. On voltage not greater than
32VÎ (dc) into an infinite load, isolated.
• Electromechanical relay
1
, Form C, 5A @ 120/240VÅ
(ac), 6A @ 28VÎ (dc), 1/8 hp. @ 120VÅ (ac) or
125VA @ 120VÅ (ac). With or without contact sup-
pression. Off-state output impedance with RC sup-
pression is 20kΩ.
• Process, 0-20mA, 4-20mA into 800Ω maximum, 0-
5VÎ (dc), 1-5VÎ (dc) or 0-10VÎ (dc) into 1kΩ mini-
mum
1
, reverse acting, isolated.
• Electromechanical relay, Form A/B, 5A @ 120/240VÅ
(ac), 6A @ 28VÎ (dc), 1/8 hp. @ 120VÅ (ac) or
125VA @ 120VÅ (ac). Without contact suppression.
• External transmitter power supply, 5V ±5% @ 30mA,
12V ±5% @ 30mA or 20V ±5% @ 30mA.
• EIA/TIA-232 communications or EIA/TIA-485, EIA/TIA-
422 communications, opto-isolated.
Accuracy
• Calibration accuracy and sensor conformity: ± 0.1% of
span, ±1 LSD, 77°F ± 5°F (25°C ± 3°C) ambient and
rated line voltage ±10%.
• Accuracy span: 1000°F (540°C) minimum.
• Temperature stability: ± 0.2°F/°F (0.1°C/°C) change in
ambient.
• Voltage stability: ± 0.01% of span /% of rated line volt-
age.
Agency Approvals
• UL, C-UL File #43684
• CE: 89/336/EEC Electromagnetic Compatibility
Directive.
EN 50081-2: 1994 Emissions.
EN 50082-2: 1995 Immunity.
• 73/23/EEC Low-Voltage Directive.
EN 61010-1: 1993 Safety.
• NEMA 4X
Terminals
• #6 compression universal head screws (tighten to 5
inch/pounds maximum), accepts 20-14 gauge wire.
Line Voltage/Power
• 100 to 240VÅ
1
(ac) +10%/-15%, 50/60Hz, ± 5%.
• 24 to 28V‡
1
(ac/dc) +10%/-15%, 50/60Hz, ±5%.
• 16VA maximum.
• Fused internally (factory replaceable only) Slo-Blo®
type (time-lag): 2A, 250V for high-voltage versions;
5A, 250V for low-voltage versions.
• Non-volatile memory retains data if power fails.
Operating Environment
• 32 to 149°F (0 to 65°C), 0 to 90% RH, non-condens-
ing.
Storage Temperature
• -40 to 185°F (-40 to 85°C).
Mechanical
• 1/8 DIN panel mount, NEMA 4X (IP65 equivalent) front
panel.
• Overall width x height x depth:
horizontal - 4.03" x 2.18" x 4.74"
(102mm x 55mm x 120mm);
vertical - 2.18" x 4.03" x 4.74"
(55mm x 102mm x 120mm).
• Depth behind panel; 4.06" (103mm).
• Weight: less than or equal to 14.0oz (0.40kg).
Sample/Update Rates
• 1 input: 10Hz.
• 2 inputs: 5Hz.
• Retransmit: 1Hz.
• Remote set point: 1Hz.
• PID: 10Hz.
• Outputs: 10Hz.
• Display: 2Hz.
• Alarm Outputs: 1 Hz
Resolution
• Inputs: 16 bits.
• Outputs: 12 bits.
1
Electromechanical relays are warranted for 100,000 clo-
sures only. Solid-state switching devices are recom-
mended for applications requiring fast cycle times or
extended service life.
2
Not an ANSI symbol.
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