Grieve Corporation ETR-901 Installation Manual
INSTRUCTION
MANUAL
MANUAL NO. 17
48mm, 1/16 DIN Solid State Temperature
Controller - Relay Output - Solid State
Output - For Heating -
Model Series: ETR-901, ETR-902, ETR-905
ETR-901
ETR-902
ETR-905
All temperature controls in this series are made to fit
into panel cut-outs which measure 1
25
⁄32” (45mm)
square. Aminimum of 4” (102mm) in depth is required
for electrical clearances of rear terminal connections.
The following specifications are common to all models:
INPUT
Thermocouple (T/C): Type K, J. Specified on
Control Label.
RTD: PT 100 ohm DIN (
=
.00385) or JIS (
=
.00392) Two or Three-Wire.
Cold Junction Automatic
Compensation:
Input Break Protection: Built-in, upscale on open
sensor and output off.
Input Impedance: 10M ohm.
Common Mode
Rejection (CMR): CMRR 120 dB, Min.
Normal Mode
Rejection (NMR): NMRR 60 dB, Min. (60Hz)
CONTROL OUTPUT
Relay–Heating: SPDT relay, 3 amps
maximum resistive load at
120V/240VAC, 24VDC.
Optional: 3-32VDC: For control of solid state
relay.
CONTROL MODES
On-Off: Hysteresis: 5.0% of scale
symmetrically above and
below the set point.
Proportional: Proportional Band fixed at
5% of scale. Standard
relay cycle time, 20
seconds. 1 second for SSR
controls.On ETR-905,
manual reset is 4% of
scale, externally adjustable.
INDICATION
Output: “Red” LED, heater on.
“Green” LED, heater off.
SET POINT
Resolution: ETR-901, 902: 0.2% of
SPAN.
ETR-905: least significant
digit.
Accuracy: ETR-901, 902: 0.2% of
SPAN.
ETR-905: least significant
digit.
2
Mounting Dimensions
Lead Termination
MANUAL RESET ADJUSTMENT
(Applies to the ETR-905 only.)
When the process stabilizes, approximately one half
hour after adjusting set point, an adjustment in “reset”
may also be necessary. Start with the reset adjustment
pointing to zero. If the temperature indication stabilizes
above the set point temperature, then adjust the reset
to the “minus” side. If the temperature indication
stabilizes below the set point temperature, then adjust
to the “plus” side. By turning this adjustment once or
more, the indicated temperature should eventually
match the set point temperature. It is very important to
wait approximately 15 minutes after each adjustment to
allow the system to stabilize.
WIRING
All wiring should conform to local and national codes:
Following Diagrams for ETR-901 and ETR-902
Models:
(Do not operate 120 volt controls on 240 volts.)
Diagram 1: For 120VAC operation and relay output.
An external magnetic contactor must be
used if the heater load exceeds 360
watts.
Diagram 2: For 120VAC operation and 3-32VDC
output. For use with solid-state relay
for heater control. Solid-state relays
can be single or three-phase.
Following Diagrams for ETR-905 Model:
Diagram 3: For 90-264VAC operation and relay
output. An external magnetic contactor
must be used if the heater load
exceeds 3 amps.
Diagram 4: For 90-264VAC operation and 3-32VDC
output. For use with a solid-state relay
for heater control. Solid-state relays
can be single or three-phase.
NOTE: The use of motor starters in place of magnetic
contactors should be avoided. They have very large
inductive loads that can damage the controller’s relay.
POWER
Rating: ETR-901 and 902 models
110/220VAC
NOT field
selectable ±15%, 50/60Hz.
ETR-905 model 90-
264VAC. 24V AC/DC
models available on special
order.
Consumption: Less than 3VA.
ENVIRONMENTAL & PHYSICAL
Operating Temperature: 10° to 125°F (-12 to 52°C).
Humidity: 10 to 90% RH (non-
condensing).
Insulation: 20M ohm Min, (5000VDC).
Breakdown: 2000VAC, 50/60Hz,
1 minute.
Vibration: 10 - 55Hz, Amplitude
1.0mm.
Shock: 660 ft./S
2
(20g).
Weight: 9 oz. (250 grams)
DIMENSIONS
H 17⁄8” (48mm)
W 17⁄8” (48mm)
D 33⁄4” (95mm)
Depth behind panel 33⁄8”
(86mm)
Panel Cutout: 1
25
⁄32” sq. (45mm sq.)
DIN Case: Plastic, full plug-in
construction, with screw
terminals on rear,
adjustable brackets for
panel mounting.
MOUNTING
When mounting the instrument, it is important the
control remains within the ambient temperature range
of 10 to 125°F. Mounting it in any position is permissible. After inserting the control into the panel, secure it
with the two mounting brackets provided with each unit.
Mounting Bracket
1-25/32"
(45mm)
1-25/32"
(45mm)
Panel Cutout
Panel
3 3/8"
(86mm)
3 3/4"
(95mm)
9/16"
5/16"
SPADE TONGUE
CONNECTOR FOR
NO. 6 STUD
3/8"
20 Ga. Wire
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