BAS LC-22C Instruction Manual - page 5
Section 3. INSTALLATION
LC-22C CONTROLLER
This section concerns installation for stand-alone operation of the LC-22C with the optional
universal probe. For operation of the other accessories, see subsequent sections.
1.
Use the cable adapter (EF-1575) to convert the special safety receptacle on the back panel
of the LC-22C to a standard 3-prong socket. Plug the device to be controlled (e.g.,
heating mantle, tape, etc.) into this socket. If you only wish to measure temperature
and do not need to control it, you can skip this step.
2.
Plug the cable leads from the stainless steel UNIVERSAL PROBE (EW-8116) into the
red, yellow, and black jacks on the back panel of the LC-22C labeled “PROBE 1" or
”PROBE 2". The black jack provides grounding for the instrument and must be
connected for safety purposes.
3.
The liquid probe is usually accurate to within 1°C of the actual set-point when shipped.
The reproducibility or precision of the temperature set-point is
±
0.1°C regardless of
the actual temperature. If greater accuracy is desired, follow the calibration procedure.
To perform the calibration, first remove the top cover of the LC-22C by removing the
four screws located on the sides of the top cover. Since both channel 1 and channel 2
are identical, calibrating instructions will be given for channel 1 adjustments, while
channel 2 adjustments will appear in parentheses ().
To calibrate the probe, place it in an ice bath and connect the probe leads to the
“PROBE 1" (”PROBE 2") jacks on the back panel. Turn the main power on and rotate
the display selector knob to “SENS 1" (”SENS 2"). Using a small screwdriver, rotate
the adjusting screw on the top of the potentiometer R45 (R56) for a reading of 00.0°
on the front-panel digital readout. Remove the probe from the ice bath. If a two-point
calibration is desired, go to step 5.
4.
This completes the single-point calibration of the liquid probe. The top cover should be
reinstalled using the four retaining screws on the sides of the cover.
5.
A two-point calibration can be made by placing the probe in boiling water and adjusting
R46 (R55) first to a display reading of 99.9, then to 00.0 (indicating 100.0°C) with the
center decimal point on. There could be a very slight interaction between the freezing
and boiling point adjustments, so additional adjustments to R45 and R46 (R56 and
R55) could be needed to obtain the highest degree of accuracy. Remove the probe
from the high temperature bath.
6.
This completes the two-point calibration of the liquid probe. The top cover should be
reinstalled using the four retaining screws on the sides of the cover.
LC-22C CONTROLLER
Section 3. INSTALLATION
3