Thermo Scientific 2870 Operating And Maintenance Manual page 43

Reciprocal shaking water baths

Table of Contents

Section 11 Part Replacement

11-4

Reciprocal Shaking Water Baths

Replace CPU or Display/

Keyboard Board. See note

on following page.**

* Calibration of the low and high end of the sensor input is done at the factory. Field calibration of the sensor may be per-

formed using the following technique: Enter the configuration routine and press the top left switch until a little "c" (Item H) is

displayed. Add water that is around 10°C to the bath completely covering the sensor. Insert a calibrated thermometer. After

the thermometer stabilizes, match the display setting to the thermometer reading by pressing the "UP" or "DOWN" push but-

ton switch. Press the top left switch. The readout will now display a big "C" (Item I). Remove water from the bath and add

hot water of about 70 - 80°C. After the unit stabilizes, match readout display to temperature on thermometer and press the

top left switch. Calibration is now complete.

**Note: When replacing CPU printed circuit board reprogramming may be necessary. Follow thoroughly instructions provided

with the replacement circuit board.

6. continued

Immediately following power up with the push-button depressed, the readout will display a

3-digit number. This is the software revision. The readout will then begin to do a self-test of

digits. Press the "Select/Enter" push-button once. The readout will display 0000. Follow the

listing below to complete the configuration.

A. Enter 37 using up/down arrows.

B. Enter 12 using up/down arrows.

C. Enter 2.0 using up/down arrows.

D. Enter 500 using up/down arrows.

E. Enter 1 using up/down arrows.

F. Display Not Used.

G. Display Not Used.

H. LOW TEMP CALIBRATION*

LITTLE c. Factory Setting.

I. HI TEMP CALIBRATION

BIG C. Factory Setting.

Configuration is now complete

Press "Select/Enter"

Thermo Scientific

Table of Contents

2871 2872 2873