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. A minimum 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.
