32 ■ Watlow MINICHEF 2000 Specifications

Audible Output Options
• Switched dc signal, 4.5V to 5.25V, 30mAmaximum
output, minimum load resistance > 150Ω, non-isolated.
• Internal audible alarm, 75dB at 10 cm.
Connectors
• Sensor Input Terminal Strip4: RIACON, 6-position,
quick-connect.
• Power Supply & Input/Output Terminal4: AMP,
15-position, quick-connect.
Power/ Line Voltage
• 20.4 to 26.4VÅ(ac), 47 to 63Hz.
• 15VAmaximum.
��� For CE applications, input power must be limited to
15W external to the control.
• Program retention upon power failure via non-volatile
memory.
• Battery/real-time clock option: 6-year lithium battery,
provides power backup upon power failure, operation
resumption after power recovery, ability to display time
of day.
Operating Environment
• 32 to 176°F (0 to 80°C), 0 to 90% RH, non-condensing.
Storage Temperature
• -40 to 176°F (-40 to 80°C).
Mechanical
• Case: polycarbonate Lexan with adjustable mounting
collar (vertical or horizontal orientation), designed for
mounting on 16-, 18-, 20- and 22-gauge panels.
• Internal panel mounting requires a specified panel
cutout and four #6-32 studs or equivalent.
• Overall width x height x depth: horizontal - 4.13 in x
3.25 in x 2.00 in; vertical - 3.25 in x 4.13 in x 2.00 in
(Assumes mating connectors are attached. Does not
include wire bundle space requirements.).
• Vibration: 2g, 10 to 150Hz, applied in any one of three
axes.
• Weight: 6.50oz maximum.
Program Storage
• All non-embedded user and factory programs are
stored in non-volatile memory. Can be changed by
reprogramming.
Sample/Update Rates
• 1 input: 4Hz.
• 2 inputs: 4Hz.
• PID: 1Hz.
• Control outputs: 100Hz.
• Display: 10Hz.
1The MINICHEF 2000 controller is to be used in systems with an
external high temperature limiting device.
2Thermocouple lead resistance of 200Ωcauses < 1°C error. RTD, 22
gauge wire will not contribute more than 0.086°F error/ft.
3Dual channel applications require either two thermocouple sen-
sors or two identical RTD sensor types.
4For mating connector information, see Ordering Information
Accessory section.
5Certified for thermometer accuracy (oven and hot food holding
applications from 32°F to 60°F) when used with RTD or type J thermo
couple probes.
Specifications (1032)
Control Mode
• Single and dual heat channels, PID or on/off.1
• Microprocessor-based, programmable, reverse-acting
control outputs.
• User-selectable embedded application software defines
operation of display, keys, inputs, outputs, timing
action.
• One-step auto-tuning, WatHelp diagnostics, WatCurve
temperature compensation.
Agency
• CE approved:
89/336/EEC Electromagnetic Compatibility Directive
-EN 50081-1: Emissions
-EN 50082-1: Immunity
73/23/EEC Low-Voltage Directive
-EN 60730-1 and EN 60730-2-9: Safety
• NSF Listed, Criteria 2.5
• AGA: UL tested to AGA standard Z21.23, UL File
#E43684.
• UL and C-UL recognized, UL 197, 873, 991 and CSA
standard C22.2-24, File # E43684.
Operator Interface
• Membrane overlay, contamination and water resistant,
(supplied by customer).
• LED display, 5-digit, 0.56 in high, red.
• Displays times, temperatures, user prompts and
diagnostic codes.
• User-selectable time and temperature display formats.
• Temperature display formats—˚F or ˚C.
• Time display formats—H:MM:SS, HH:MM, or MMM:SS.
• 8 discrete indicator LEDs, red.
• 6 tactile feedback keys.
• Menu-driven operation and manual modes available.
• WatHelp diagnostics.
• Real-time clock option displays time of day.
Accuracy
• Calibration accuracy and sensor conformity2: ± 2.0°F
for Type J thermocouple and RTD, ±0.35% of span for
Type K and E thermocouples, ±1 LSD, 77°F ±5°F
ambient and rated line voltage of ±10%.
• Accuracy span: 1000°F (540°C) minimum.
• Temperature stability: ±0.15˚F/ ˚F (0.15˚C/˚C) change
in ambient typical.
Sensors/ Inputs
• Contact inputs, TTL compatible with internal pull-up
resistor, two available.
• Thermocouple,3software selectable Type J, K or E,
32 to 1200°F. (Dual-channel applications require at
least one ungrounded thermocouple).
•RTD,
32- or 3-wire, platinum, 100, 500, 1000Ω, at 0°C,
software selectable DIN or JIS curves, 0 to 1200°F
(3-wire will function as 2-wire).
• Input A/D resolution: 15 bit.
Output Options
• Solid-state relay, 0.4A, with or without contact suppres-
sion.
• Switched dc signal, 4.5V to 5.25V, 30mAmaximum
output, minimum load resistance > 150Ω, non-isolated.